Fix text/plain mime

- transfer one by one

.idea/compiler.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="1.8" />
+    <bytecodeTargetLevel target="11" />
   </component>
 </project>

.idea/gradle.xml

@@ -4,10 +4,9 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="PLATFORM" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="1.8" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
@@ -15,7 +14,6 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
-        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>

.idea/misc.xml

@@ -1,5 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="DesignSurface">
+    <option name="filePathToZoomLevelMap">
+      <map>
+        <entry key="app/src/main/res/layout/file_info.xml" value="0.24479166666666666" />
+        <entry key="app/src/main/res/layout/layout.xml" value="0.35989583333333336" />
+        <entry key="app/src/main/res/layout/settings_activity.xml" value="0.215625" />
+        <entry key="app/src/main/res/xml/network_security_config.xml" value="0.35989583333333336" />
+        <entry key="app/src/main/res/xml/root_preferences.xml" value="0.35833333333333334" />
+      </map>
+    </option>
+  </component>
   <component name="NullableNotNullManager">
     <option name="myDefaultNullable" value="org.jetbrains.annotations.Nullable" />
     <option name="myDefaultNotNull" value="androidx.annotation.NonNull" />
@@ -25,7 +36,7 @@
     </option>
     <option name="myNotNulls">
       <value>
-        <list size="13">
+        <list size="14">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
           <item index="1" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
           <item index="2" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
@@ -39,11 +50,12 @@
           <item index="10" class="java.lang.String" itemvalue="org.eclipse.jdt.annotation.NonNull" />
           <item index="11" class="java.lang.String" itemvalue="io.reactivex.annotations.NonNull" />
           <item index="12" class="java.lang.String" itemvalue="io.reactivex.rxjava3.annotations.NonNull" />
+          <item index="13" class="java.lang.String" itemvalue="lombok.NonNull" />
         </list>
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

.idea/runConfigurations.xml

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>

app/build.gradle

@@ -2,7 +2,6 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 30
-    buildToolsVersion "30.0.2"
 
     defaultConfig {
         applicationId "com.localtransfer"
@@ -21,8 +20,8 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
     }
 }
 

app/src/main/AndroidManifest.xml

@@ -3,13 +3,17 @@
     package="com.localtransfer">
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="28" />
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
-        android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:requestLegacyExternalStorage="true"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
@@ -17,7 +21,7 @@
             android:name=".TransferService"
             android:enabled="true"
             android:exported="true"></service>
-
+        <!-- android:usesCleartextTraffic="true" -->
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}"

app/src/main/java/com/localtransfer/DownloadFile.java

@@ -0,0 +1,289 @@
+package com.localtransfer;
+
+import android.animation.ObjectAnimator;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.Environment;
+import android.provider.MediaStore;
+import android.util.Log;
+import android.view.animation.Animation;
+import android.view.animation.LinearInterpolator;
+import android.widget.Button;
+import android.widget.LinearLayout;
+
+import androidx.core.content.FileProvider;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.sql.Timestamp;
+
+public class DownloadFile extends Transfer {
+
+    public String href;
+
+    public String mime;
+
+    public String type;
+
+    public Uri uri;
+
+    private Button button;
+
+    public DownloadFile(Integer id) {
+        this.id = id;
+        instances.add(this);
+        info = "Download complete";
+        state = STATE_NOT_REQUESTED;
+        drawable = R.drawable.ic_download_24;
+    }
+
+    @Override
+    public void startTransfer() {
+        super.startTransfer();
+
+        startedTime = new Timestamp(System.currentTimeMillis());
+
+        state = STATE_RUNNING;
+
+        buttonProgressStart();
+
+        if (uri == null && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
+            ContentValues values = new ContentValues();
+            values.put(MediaStore.MediaColumns.DISPLAY_NAME, name);
+            values.put(MediaStore.MediaColumns.MIME_TYPE, mime);
+            values.put(MediaStore.MediaColumns.RELATIVE_PATH, Transfer.shared_storage);
+            uri = resolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, values);
+        }
+        try {
+            downloadFile();
+        } catch (IOException | NullPointerException e) {
+            final String ExceptionName = e.getClass().getSimpleName();
+            final String ExceptionMess = e.getMessage();
+            e.printStackTrace();
+
+            state = Transfer.STATE_FAILED;
+            progressEnd();
+            buttonProgressEnd();
+
+            if(ExceptionName != null && ExceptionMess != null) {
+                errorSnackbar(ExceptionName + ": " + ExceptionMess);
+            }
+
+        }
+    }
+
+    public boolean exist(Context context) {
+        if (!Transfer.use_shared_storage){
+            File file = new File(activity.getFilesDir(), name);
+
+            uri = FileProvider.getUriForFile(activity, activity.getPackageName(), file);
+
+            if (file.exists() && file.length() == size)
+                return true;
+        }
+        else {
+            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
+                Cursor cursor = context.getContentResolver().query(MediaStore.Downloads.EXTERNAL_CONTENT_URI, null, null, null, null);
+                while (cursor.moveToNext()) {
+                    String MediaStore_File_name = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Downloads.DISPLAY_NAME));
+                    long MediaStore_File_size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Downloads.SIZE));
+                    if(MediaStore_File_name.equals(name) && MediaStore_File_size == size) {
+                        int cursor_id = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Downloads._ID));
+                        uri = ContentUris.withAppendedId(MediaStore.Downloads.EXTERNAL_CONTENT_URI, cursor_id);
+                        return true;
+                    }
+                }
+            }
+            else {
+                String save_location = null;
+                if (mime.equals("text/plain"))
+                    save_location = context.getCacheDir().toString();
+                else
+                    save_location = Environment.getExternalStorageDirectory() + "/" + Transfer.shared_storage;
+                new File(save_location).mkdirs();
+                File file = new File(save_location, name);
+                try {
+                    file.createNewFile();
+                } catch (IOException e) {
+                    final String ExceptionName = e.getClass().getSimpleName();
+                    final String ExceptionMess = e.getMessage();
+                    e.printStackTrace();
+
+                    if(ExceptionName != null && ExceptionMess != null) {
+                        errorSnackbar(ExceptionName + ": " + ExceptionMess);
+                    }
+                }
+                uri = Uri.fromFile(file);
+                if (file.exists() && file.length() == size)
+                    return true;
+            }
+        }
+        return false;
+    }
+
+    public void setButton(Button button) {
+        this.button = button;
+        if (this.state == STATE_STANDBY) {
+            buttonProgressStart();
+        }
+    }
+
+    public InputStream getThumbnail() {
+        InputStream thumbnail = null;
+        URL url;
+        try {
+            String query = URLEncoder.encode(href, StandardCharsets.UTF_8.toString());
+            String serverUrl = root + "/thumbnail.php?file=" + query;
+            url = new URL(protocol, host, port, serverUrl);
+            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            conn.setRequestMethod("GET");
+            conn.setConnectTimeout(2000);
+
+            conn.connect();
+
+            thumbnail = conn.getInputStream();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return thumbnail;
+    }
+
+    public void downloadFile() throws IOException {
+
+        URL url = null;
+        HttpURLConnection conn = null;
+        int maxBufferSize = 1 * 1024 * 1024;
+        byte[] buffer = new byte[maxBufferSize];
+        int bufferLength;
+        loaded = 0;
+
+        String[] parts = href.split("/");
+        String path = "";
+        for(int i=0; i< parts.length - 1; i++) {
+            path = path + parts[i] + "/";
+        }
+        String query = URLEncoder.encode(parts[parts.length - 1], StandardCharsets.UTF_8.toString());
+        url = new URL(protocol, host, port, path + query.replace("+", "%20"));
+        conn = (HttpURLConnection) url.openConnection();
+        conn.setDoOutput(true);
+        conn.setRequestMethod("GET");
+        conn.setConnectTimeout(2000);
+
+        Log.d("URL", url.toString());
+
+        conn.connect();
+
+        int responseCode = conn.getResponseCode();
+
+        if (responseCode == HttpURLConnection.HTTP_OK) {
+
+            OutputStream fileOutput = activity.getContentResolver().openOutputStream(uri);
+            InputStream in = conn.getInputStream();
+
+            while ((bufferLength = in.read(buffer)) > 0) {
+                fileOutput.write(buffer, 0, bufferLength);
+                loaded+= bufferLength;
+                percent = ((loaded * 100) / size);
+                progressUpdateDelay();
+                buttonProgressUpdate();
+            }
+            fileOutput.close();
+
+            conn.disconnect();
+
+            message = "File " + name + " successful download";
+            state = Transfer.STATE_SUCCESS;
+            progressEnd();
+            buttonProgressEnd();
+
+        }
+        else {
+            String s = conn.getResponseMessage();
+            throw new HttpErrorException("error code: " + responseCode + " " + s);
+        }
+
+        conn.disconnect();
+    }
+
+    public String deleteFile() throws IOException {
+
+        URL url = null;
+        HttpURLConnection conn = null;
+
+        String message;
+
+        String query = URLEncoder.encode(name, StandardCharsets.UTF_8.toString());
+        String serverUrl = root + "/delete.php?file=" + query;
+        url = new URL(protocol, host, port, serverUrl);
+        conn = (HttpURLConnection) url.openConnection();
+        conn.setRequestMethod("GET");
+        conn.setConnectTimeout(2000);
+
+        conn.connect();
+
+        int responseCode = conn.getResponseCode();
+
+        if (responseCode == HttpURLConnection.HTTP_OK) {
+
+            message = "File " + name + " successful deleted";
+        }
+        else {
+            String s = conn.getResponseMessage();
+            throw new HttpErrorException("error code: " + responseCode + " " + s);
+        }
+
+        conn.disconnect();
+
+        return message;
+    }
+
+    public void buttonProgressStart() {
+        activity.runOnUiThread(() -> {
+            final Drawable image = Transfer.activity.getDrawable(R.drawable.ic_spinner_rotate);
+
+            if(button != null) {
+                int h = image.getIntrinsicHeight();
+                int w = image.getIntrinsicWidth();
+                image.setBounds(0, 0, w, h);
+                button.setCompoundDrawables(button.getCompoundDrawables()[0], null, image, null);
+                ObjectAnimator anim = ObjectAnimator.ofInt(image, "level", 0, 10000);
+                anim.setDuration(1000);
+                anim.setRepeatCount(Animation.INFINITE);
+                anim.setInterpolator(new LinearInterpolator());
+                anim.start();
+            }
+        });
+    }
+
+    private void buttonProgressUpdate(){
+        activity.runOnUiThread(() -> {
+            if (app_started && button != null)
+                button.setText(String.format("Download in progress %d%%", percent));
+        });
+    }
+
+    public void buttonProgressEnd() {
+        activity.runOnUiThread(() -> {
+            if (button != null) {
+                final LinearLayout layout = (LinearLayout) button.getParent();
+                layout.findViewById(R.id.file_view).setVisibility(LinearLayout.VISIBLE);
+                layout.findViewById(R.id.file_share).setVisibility(LinearLayout.VISIBLE);
+                button.setVisibility(LinearLayout.GONE);
+                button.setEnabled(true);
+
+                button.setText(activity.getString(R.string.file_download));
+                button.setCompoundDrawables(button.getCompoundDrawables()[0], null, null, null);
+            }
+        });
+    }
+}

app/src/main/java/com/localtransfer/MainActivity.java

@@ -2,31 +2,33 @@ package com.localtransfer;
 
 import android.Manifest;
 import android.app.Activity;
+import android.app.Notification;
+import android.app.PendingIntent;
 import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Bundle;
-
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import com.google.android.material.snackbar.Snackbar;
-import com.google.android.material.tabs.TabLayout;
-
-import androidx.appcompat.widget.Toolbar;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-import androidx.preference.PreferenceManager;
-import androidx.viewpager.widget.ViewPager;
-import androidx.appcompat.app.AppCompatActivity;
-
 import android.os.Environment;
 import android.util.Log;
+import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.Toast;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.app.ActivityCompat;
+import androidx.core.app.NotificationManagerCompat;
+import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
+import androidx.viewpager.widget.ViewPager;
+
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.tabs.TabLayout;
+
 import java.io.File;
 import java.util.ArrayList;
 
@@ -59,7 +61,18 @@ public class MainActivity extends AppCompatActivity {
             }
         });
 
-        checkAndRequestPermissions();
+        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.Q) {
+            checkAndRequestPermissions();
+        }
+
+
+        Transfer.notifBuilder = new Notification.Builder(this);
+        Transfer.notifiManager = NotificationManagerCompat.from(this);
+        Transfer.inflater = (LayoutInflater) this.getSystemService(this.LAYOUT_INFLATER_SERVICE);
+        Transfer.resolver = this.getContentResolver();
+
+        Intent notificationIntent = new Intent(this, MainActivity.class);
+        Transfer.pendingIntent = PendingIntent.getActivity(this,0, notificationIntent, 0);
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
 
@@ -68,7 +81,8 @@ public class MainActivity extends AppCompatActivity {
                     .putString("host", getString(R.string.server_host_def))
                     .putString("port", getString(R.string.server_port_def))
                     .putString("root", getString(R.string.server_root_def))
-                    .putString("local_storage", getString(R.string.local_storage_def))
+                    .putString("shared_storage", getString(R.string.shared_storage_def))
+                    .putBoolean("use_shared_storage", false)
                     .apply();
 
         Transfer.parameter(this);
@@ -82,10 +96,10 @@ public class MainActivity extends AppCompatActivity {
             viewPager.setCurrentItem(2);
             if ("text/plain".equals(type)) {
                 String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
-                Transfer.handleSendText(sharedText);
+                UploadFile.handleSendText(sharedText);
             } else {
                 Uri uri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
-                Transfer.handleSendFile(uri);
+                UploadFile.handleSendFile(uri);
             }
         } else if (Intent.ACTION_SEND_MULTIPLE.equals(action) && type != null) {
             viewPager.setCurrentItem(2);
@@ -93,7 +107,7 @@ public class MainActivity extends AppCompatActivity {
             int nbItem = fileUris.size();
             Toast.makeText(this, "You select " + nbItem + " files", Toast.LENGTH_SHORT).show();
             if (fileUris != null)
-                for(Uri uri : fileUris) Transfer.handleSendFile(uri);
+                for(Uri uri : fileUris) UploadFile.handleSendFile(uri);
         }
 
     }
@@ -111,7 +125,7 @@ public class MainActivity extends AppCompatActivity {
 
             if (type != null) {
                 String sharedText = data.getStringExtra(Intent.EXTRA_TEXT);
-                Transfer.handleSendText(sharedText);
+                UploadFile.handleSendText(sharedText);
             }
             else {
                 ArrayList<Uri> fileUris = new ArrayList<>();
@@ -127,7 +141,7 @@ public class MainActivity extends AppCompatActivity {
                     fileUris.add(uri);
                 }
                 for (Uri uri : fileUris) {
-                    Transfer.handleSendFile(uri);
+                    UploadFile.handleSendFile(uri);
                 }
             }
         }
@@ -137,14 +151,14 @@ public class MainActivity extends AppCompatActivity {
     public void onResume(){
         super.onResume();
 
-        Progress.app_started = true;
+        Transfer.app_started = true;
     }
 
     @Override
     public void onPause(){
         super.onPause();
 
-        Progress.app_started = false;
+        Transfer.app_started = false;
     }
 
     @Override
@@ -182,7 +196,7 @@ public class MainActivity extends AppCompatActivity {
                 startActivity(settings);
                 break;
             case R.id.action_folder:
-                String save_location = Environment.getExternalStorageDirectory() + "/" + Transfer.local_storage;
+                String save_location = Environment.getExternalStorageDirectory() + "/" + Transfer.shared_storage;
                 Uri selectedUri = Uri.parse(save_location.toString());
                 boolean intentSuccess = false;
                 try {
@@ -213,7 +227,7 @@ public class MainActivity extends AppCompatActivity {
 
     public static final int REQUEST_ID_READ_EXTERNAL_STORAGE = 2001;
 
-    private  boolean checkAndRequestPermissions() {
+    private boolean checkAndRequestPermissions() {
 
         if (ContextCompat.checkSelfPermission(
                 this, Manifest.permission.READ_EXTERNAL_STORAGE) ==

app/src/main/java/com/localtransfer/Progress.java

@@ -1,161 +0,0 @@
-package com.localtransfer;
-
-import android.animation.ObjectAnimator;
-import android.app.Notification;
-import android.app.PendingIntent;
-import android.content.Intent;
-import android.graphics.Color;
-import android.graphics.drawable.Drawable;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.animation.Animation;
-import android.view.animation.LinearInterpolator;
-import android.widget.ImageView;
-import android.widget.LinearLayout;
-import android.widget.ProgressBar;
-import android.widget.TextView;
-import android.widget.Toast;
-
-import androidx.core.app.NotificationManagerCompat;
-
-import com.google.android.material.snackbar.Snackbar;
-
-import java.util.ConcurrentModificationException;
-
-public class Progress {
-
-    private static Notification.Builder bl = new Notification.Builder(Transfer.activity);
-    private static NotificationManagerCompat notifiManager = NotificationManagerCompat.from(Transfer.activity);
-    private static final LayoutInflater inflater = (LayoutInflater) Transfer.activity.getSystemService(Transfer.activity.LAYOUT_INFLATER_SERVICE);
-
-    private static Intent notificationIntent = new Intent(Transfer.activity, MainActivity.class);
-    private static PendingIntent pendingIntent = PendingIntent.getActivity(Transfer.activity,0, notificationIntent, 0);
-
-    public static View root;
-    public static boolean fragment_on = false;
-    public static boolean app_started = false;
-
-    private static long	savedTimeMillis;
-
-    public static void PreProgress(Transfer tr) {
-        Transfer.activity.runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-
-                final Drawable image = Transfer.activity.getDrawable(R.drawable.ic_spinner_rotate);
-
-                if(tr.button != null) {
-                    int h = image.getIntrinsicHeight();
-                    int w = image.getIntrinsicWidth();
-                    image.setBounds(0, 0, w, h);
-                    tr.button.setCompoundDrawables(tr.button.getCompoundDrawables()[0], null, image, null);
-                    ObjectAnimator anim = ObjectAnimator.ofInt(image, "level", 0, 10000);
-                    anim.setDuration(1000);
-                    anim.setRepeatCount(Animation.INFINITE);
-                    anim.setInterpolator(new LinearInterpolator());
-                    anim.start();
-                }
-            }
-        });
-    }
-
-    public static void ProgressUpdateDelay(Transfer tr) {
-        // Run only every second to reduce CPU usage
-        if (System.currentTimeMillis() > (savedTimeMillis + 1000)) {
-            savedTimeMillis = System.currentTimeMillis();
-            ProgressUpdate(tr);
-        }
-    }
-
-    private static void ProgressUpdate(Transfer tr){
-        Transfer.activity.runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-
-                if (Progress.app_started && tr.button != null)
-                    tr.button.setText(String.format("Download in progress %d%%", tr.percent));
-
-                try {
-
-                    bl.setSmallIcon(R.drawable.ic_upload_and_download_from_the_cloud)
-                            .setContentTitle(tr.fileName)
-                            .setContentText(String.format("%d%% %s/%s", tr.percent, tr.loadedHuman, tr.fileSizeHuman))
-                            .setProgress(100, (int) tr.percent, false)
-                            .setContentIntent(pendingIntent);
-                    notifiManager.notify(Transfer.NOTIF_SERVICE, bl.build());
-
-                    if (app_started && fragment_on)
-                        showProgressFragment(tr);
-
-                } catch (ConcurrentModificationException e) {
-                    e.printStackTrace();
-                }
-            }
-        });
-    }
-
-    public static void PostProgress(Transfer tr) {
-        ProgressUpdate(tr);
-        Transfer.activity.runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-
-                notifiManager.cancel(Transfer.NOTIF_SERVICE);
-
-                if (!app_started) {
-                    bl.setSmallIcon(R.drawable.ic_upload_and_download_from_the_cloud)
-                            .setContentTitle(tr.fileName)
-                            .setContentText(tr.info)
-                            .setProgress(0, 0, false)
-                            .setContentIntent(pendingIntent);
-                    notifiManager.notify(tr.id, bl.build());
-                }
-
-                if (tr.button != null) {
-                    final LinearLayout layout = (LinearLayout) tr.button.getParent();
-                    layout.findViewById(R.id.file_view).setVisibility(LinearLayout.VISIBLE);
-                    layout.findViewById(R.id.file_share).setVisibility(LinearLayout.VISIBLE);
-                    tr.button.setVisibility(LinearLayout.GONE);
-                    tr.button.setEnabled(true);
-
-                    tr.button.setText(Transfer.activity.getString(R.string.file_download));
-                    tr.button.setCompoundDrawables(tr.button.getCompoundDrawables()[0], null, null, null);
-                }
-
-                System.out.println(tr.message);
-                /*Snackbar.make(Transfer.activity.findViewById(R.id.view_pager), tr.message, Snackbar.LENGTH_LONG)
-                        .setAction("Action", null).show();*/
-                Toast.makeText(Transfer.activity, tr.message, Toast.LENGTH_SHORT).show();
-
-            }
-        });
-    }
-
-    public static void showProgressFragment(Transfer tr){
-
-        LinearLayout groot = root.findViewById(R.id.groot);
-
-        final View progress;
-
-        if (groot.findViewById(tr.id) != null) {
-            progress = groot.findViewById(tr.id);
-        } else {
-            progress = inflater.inflate(R.layout.progress, null);
-            progress.setId(tr.id);
-            Transfer.activity.runOnUiThread(() -> {
-                groot.addView(progress, 0);
-            });
-        }
-
-        ((ProgressBar) progress.findViewById(R.id.progressBar)).setProgress((int) tr.percent);
-        ((ImageView) progress.findViewById(R.id.transferType)).setImageResource(tr.drawable);
-        ((TextView) progress.findViewById(R.id.progressText)).setText(tr.percent + " %");
-        ((TextView) progress.findViewById(R.id.fileName)).setText(tr.fileName);
-        ((TextView) progress.findViewById(R.id.fileSize)).setText(String.format("%s/%s", tr.loadedHuman, tr.fileSizeHuman));
-
-        if (tr.state == Transfer.STATE_SUCCESS)
-            ((TextView) progress.findViewById(R.id.fileName)).setTextColor(Color.GREEN);
-        else if (tr.state == Transfer.STATE_FAILED)
-            ((TextView) progress.findViewById(R.id.fileName)).setTextColor(Color.RED);
-    }
-}

app/src/main/java/com/localtransfer/SettingsActivity.java

@@ -1,8 +1,10 @@
 package com.localtransfer;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.os.Environment;
 import android.util.Log;
@@ -10,9 +12,12 @@ import android.view.MenuItem;
 
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 import androidx.preference.PreferenceManager;
+import androidx.preference.SwitchPreference;
 
 import lib.folderpicker.FolderPicker;
 
@@ -42,8 +47,32 @@ public class SettingsActivity extends AppCompatActivity {
             setPreferencesFromResource(R.xml.root_preferences, rootKey);
 
             SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
-            directory = findPreference("local_storage");
-            directory.setSummary(prefs.getString("local_storage", null));
+
+            directory = findPreference("shared_storage");
+            directory.setSummary(prefs.getString("shared_storage", null));
+
+            SwitchPreference shared;
+            shared = findPreference("use_shared_storage");
+            if(shared.isChecked()) {
+                if(checkAndRequestPermissions())
+                    directory.setVisible(true);
+                else
+                    shared.setChecked(false);
+            }
+            else
+                directory.setVisible(false);
+
+            shared.setOnPreferenceClickListener(preference -> {
+                if(shared.isChecked()) {
+                    if(checkAndRequestPermissions())
+                        directory.setVisible(true);
+                    else
+                        shared.setChecked(false);
+                }
+                else
+                    directory.setVisible(false);
+                return false;
+            });
             directory.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
                 @Override
                 public boolean onPreferenceClick(Preference preference) {
@@ -54,6 +83,35 @@ public class SettingsActivity extends AppCompatActivity {
             });
         }
 
+        private boolean checkAndRequestPermissions() {
+
+            if (ContextCompat.checkSelfPermission(
+                    getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE) ==
+                    PackageManager.PERMISSION_GRANTED) {
+                Log.d("READ_EXTERNAL_STORAGE", "already granted");
+                return true;
+            }
+            else {
+                ActivityCompat.requestPermissions(getActivity(), new String[] {android.Manifest.permission.READ_EXTERNAL_STORAGE}, MainActivity.REQUEST_ID_READ_EXTERNAL_STORAGE);
+            }
+            return false;
+        }
+        @Override
+        public void onRequestPermissionsResult(int requestCode,
+                                               String permissions[],
+                                               int[] grantResults) {
+            switch (requestCode) {
+                case MainActivity.REQUEST_ID_READ_EXTERNAL_STORAGE:
+                    if (grantResults.length > 0 &&
+                            grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                        Log.d("READ_EXTERNAL_STORAGE", "granted");
+                    }  else {
+                        Log.d("READ_EXTERNAL_STORAGE", "No granted");
+                    }
+                    return;
+            }
+        }
+
         @Override
         public void onActivityResult(int requestCode, int resultCode, Intent data) {
             super.onActivityResult(requestCode, resultCode, data);
@@ -65,7 +123,7 @@ public class SettingsActivity extends AppCompatActivity {
                             String save_location = currentPath.replace(Environment.getExternalStorageDirectory() + "/", "");
                             Log.d("Path", save_location);
                             SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
-                            prefs.edit().putString("local_storage", save_location).apply();
+                            prefs.edit().putString("shared_storage", save_location).apply();
                             directory.setSummary(save_location);
                         }
                     }

app/src/main/java/com/localtransfer/Transfer.java

@@ -1,453 +1,269 @@
 package com.localtransfer;
 
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.database.Cursor;
-import android.net.Uri;
-import android.provider.OpenableColumns;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.LinearLayout;
-import android.widget.TextView;
+import static java.lang.Integer.valueOf;
 
-import androidx.core.content.ContextCompat;
-import androidx.core.content.FileProvider;
+import android.app.Activity;
+import android.app.Notification;
+import android.app.PendingIntent;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.Color;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.core.app.NotificationManagerCompat;
 import androidx.preference.PreferenceManager;
 
 import com.google.android.material.snackbar.Snackbar;
 
-import java.io.DataOutputStream;
-import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.ProtocolException;
 import java.net.URL;
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
+import java.sql.Timestamp;
 import java.text.CharacterIterator;
-import java.text.SimpleDateFormat;
 import java.text.StringCharacterIterator;
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.ConcurrentModificationException;
-import java.util.Date;
 import java.util.List;
-import java.util.Timer;
-import java.util.TimerTask;
-
-import static java.lang.Integer.valueOf;
 
 public class Transfer {
 
+    protected static Notification.Builder notifBuilder;
+    protected static NotificationManagerCompat notifiManager;
+    protected static LayoutInflater inflater;
+    protected static ContentResolver resolver;
+
+    protected static PendingIntent pendingIntent;
+
+    public static View fragment_progress;
+    public static boolean fragment_on = false;
+    public static boolean app_started = false;
+
+    protected static long savedTimeMillis;
+
     public static String host;
     public static Integer port;
     public static String root;
     public static String protocol;
-    public static String local_storage;
+    public static String shared_storage;
+    public static boolean use_shared_storage;
 
     public static Activity activity;
 
-    public static final int STATE_STANDBY = 100;
-    public static final int STATE_RUNNING = 101;
-    public static final int STATE_SUCCESS = 102;
-    public static final int STATE_FAILED = 103;
-
-    public static final int TYPE_DOWNLOAD = 200;
-    public static final int TYPE_UPLOAD = 201;
-
-    public static final int NOTIF_SERVICE = 1000;
-    public static final int NOTIF_GROUP = 1001;
-
-    public static boolean runningTransfer = false;
-
-    private static List<Transfer> instances = new ArrayList<>();
-
-    public static List getInstances() {
-        return instances;
-    }
-
     public int state;
-    public String error;
 
-    public int type;
-
-    public Integer id;
     public int drawable;
     public String info;
     public String message;
-    public String fileName;
 
-    public long fileSize;
-    public String fileSizeHuman;
+    public String sizeSI;
 
     public long loaded;
-    public String loadedHuman = "0";
+    public String loadedSI = "0";
     public long percent;
 
-    public Transfer(int type) {
+    public static final int NOTIF_SERVICE = 1000;
 
-        id = View.generateViewId();
+    public static final int STATE_NOT_REQUESTED = 100;
+    public static final int STATE_STANDBY = 110;
+    public static final int STATE_RUNNING = 120;
+    public static final int STATE_SUCCESS = 130;
+    public static final int STATE_FAILED = 140;
 
-        switch (type) {
-            case TYPE_DOWNLOAD:
-                drawable = R.drawable.ic_download_24;
-                info = "Download complete";
-                break;
-            case TYPE_UPLOAD:
-                drawable = R.drawable.ic_upload_24;
-                info = "Upload complete";
-                break;
-            default:
-                throw new IllegalStateException("Unexpected value: " + type);
+    public static Thread thread = new Thread();
+
+    Integer id;
+
+    public String name;
+
+    public long size;
+
+    Timestamp addedTime;
+    Timestamp startedTime;
+
+    static List<Transfer> instances = new ArrayList<>();
+
+    public static List<Transfer> getInstances() {
+        List<Transfer> in = new ArrayList<>();
+        for (Transfer file: instances) {
+            //if(Arrays.asList(STATE_STANDBY, STATE_RUNNING, STATE_SUCCESS, STATE_FAILED).contains(file.state)) {
+            if(file.state == STATE_STANDBY ||
+                    file.state == STATE_RUNNING ||
+                    file.state == STATE_SUCCESS ||
+                    file.state == STATE_FAILED) {
+                in.add(file);
+            }
         }
-
-        state = STATE_STANDBY;
-        this.type = type;
-
+        //in.sort(Comparator.comparing(Transfer::getAddedTime).reversed());
+        in.sort(Comparator.comparing(e -> e.addedTime));
+        return in;
     }
 
-    public void AddTransfer() {
-        instances.add(this);
-
-        if(!runningTransfer) {
-            Intent serviceIntent = new Intent(activity, TransferService.class);
-            ContextCompat.startForegroundService(activity, serviceIntent);
-            runningTransfer = true;
-            new Thread(() -> StartTransfer(this)).start();
+    public static Transfer getFileById(int id) {
+        for (Object obj: instances) {
+            Transfer p = (Transfer) obj;
+            if (p.id == id) return p;
         }
+        return null;
     }
 
-    private static void StartTransfer(Transfer tr) {
-        try {
-            switch (tr.type) {
-                case Transfer.TYPE_DOWNLOAD:
-                    tr.downloadFile();
-                    break;
-                case Transfer.TYPE_UPLOAD:
-                    tr.uploadFile();
-                    break;
-                default:
-                    throw new IllegalStateException("Unexpected value: " + tr.type);
-            }
-        } catch (IOException e) {
-            final String ExceptionName = e.getClass().getSimpleName();
-            final String ExceptionMess = e.getMessage();
-
-            tr.state = Transfer.STATE_FAILED;
-            tr.error = ExceptionName + ": " + ExceptionMess;
-            Progress.PostProgress(tr);
-
-            if(ExceptionName != null && ExceptionMess != null) {
-                Transfer.error(ExceptionMess);
-            }
-
-        }
-
-        try {
-            for (Object obj : Transfer.getInstances()) {
-                Transfer transfer = (Transfer) obj;
-                if (transfer.state == Transfer.STATE_STANDBY)
-                    StartTransfer(transfer);
-            }
-        } catch (ConcurrentModificationException e) {
-            e.printStackTrace();
-            try {
-                Thread.sleep(10);
-            } catch (InterruptedException InterrupEx) {
-                InterrupEx.printStackTrace();
-            }
-            for (Object obj : Transfer.getInstances()) {
-                Transfer transfer = (Transfer) obj;
-                if (transfer.state == Transfer.STATE_STANDBY)
-                    StartTransfer(transfer);
-            }
-        }
-
-        Intent serviceIntent = new Intent(Transfer.activity, TransferService.class);
-        Transfer.activity.stopService(serviceIntent);
-        Transfer.runningTransfer = false;
+    public Integer getId() {
+        return id;
     }
 
     public static void parameter(Context context) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
 
         host = prefs.getString("host", null);
-        port = valueOf(prefs.getString("port", null));
         root = prefs.getString("root", null);
-        local_storage = prefs.getString("local_storage", null);
+        shared_storage = prefs.getString("shared_storage", null);
+        use_shared_storage = prefs.getBoolean("use_shared_storage", false);
         if(prefs.getBoolean("protocol", false))
             protocol = "https";
         else
             protocol = "http";
+        String portValue = prefs.getString("port", null);
+        if(portValue.equals("")){
+            if(protocol.equals("http"))
+                port = 80;
+            else if(protocol.equals("https"))
+                port = 443;
+        }
+        else
+            port = valueOf(portValue);
     }
 
-    public Uri uri;
+    public void AddTransfer() {
 
-    public static void handleSendFile(Uri uri) {
-        if (uri != null) {
-            Transfer tr = new Transfer(Transfer.TYPE_UPLOAD);
-            tr.uri = uri;
+        state = STATE_STANDBY;
 
-            Cursor cursor = activity.getContentResolver().query(uri, null, null, null, null);
-            cursor.moveToFirst();
+        addedTime = new Timestamp(System.currentTimeMillis());
 
-            tr.fileName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
-            tr.fileSize = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
-            tr.fileSizeHuman = Transfer.humanReadableByteCountBin(tr.fileSize);
+        Thread.State state = thread.getState();
 
-            tr.AddTransfer();
+        if(state == Thread.State.NEW || state == Thread.State.TERMINATED) {
+            thread = new Thread(startTransfers);
+            thread.start();
+
+            /*Intent serviceIntent = new Intent(activity, TransferService.class);
+            ContextCompat.startForegroundService(activity, serviceIntent);*/
         }
     }
 
-    public static void handleSendText(String sharedText) {
-        if (sharedText != null) {
-            SimpleDateFormat sdfDate = new SimpleDateFormat("yyyyMMdd_HHmmss");
-            Date now = new Date();
-            String strDate = sdfDate.format(now);
-            Uri uri = null;
+    public void startTransfer() {
+
+    }
+
+    public static Runnable startTransfers = () -> {
+        try {
+            for (Transfer transfer : getInstances()) {
+                if (transfer.state == Transfer.STATE_STANDBY) {
+                    transfer.startTransfer();
+                    thread.run(); // restart thread for another potential standby transfer
+                    break; // ignore remainder instance
+                }
+            }
+        } catch (ConcurrentModificationException e) {
+            e.printStackTrace();
+        }
+
+    /*Intent serviceIntent = new Intent(Transfer.activity, TransferService.class);
+    Transfer.activity.stopService(serviceIntent);*/
+    };
+
+    public void progressUpdateDelay() {
+        // Run only every second to reduce CPU usage
+        if (System.currentTimeMillis() > (savedTimeMillis + 1000)) {
+            savedTimeMillis = System.currentTimeMillis();
+            progressUpdate();
+        }
+    }
+
+    private void progressUpdate(){
+
+        loadedSI = Transfer.humanReadableByteCountBin(loaded);
+
+        activity.runOnUiThread(() -> {
 
             try {
-                File outputFile = new File(activity.getCacheDir(), strDate + ".txt");
-                FileOutputStream fileOut = new FileOutputStream(outputFile);
-                OutputStreamWriter OutWriter = new OutputStreamWriter(fileOut);
-                OutWriter.append(sharedText);
-                OutWriter.close();
 
-                fileOut.flush();
-                fileOut.close();
+                notifBuilder.setSmallIcon(R.drawable.ic_upload_and_download_from_the_cloud)
+                        .setContentTitle(name)
+                        .setContentText(String.format("%d%% %s/%s", percent, loadedSI, sizeSI))
+                        .setProgress(100, (int) percent, false)
+                        .setContentIntent(pendingIntent);
+                notifiManager.notify(Transfer.NOTIF_SERVICE, notifBuilder.build());
 
-                uri = FileProvider.getUriForFile(activity, activity.getPackageName(), outputFile);
+                if (app_started && fragment_on)
+                    showProgressFragment();
 
-            } catch (IOException e) {
+            } catch (ConcurrentModificationException e) {
                 e.printStackTrace();
             }
-            handleSendFile(uri);
-        }
+        });
     }
 
-    public String uploadFile() throws IOException {
-        URL url = null;
-        HttpURLConnection conn = null;
-        DataOutputStream request = null;
-        String boundary = "*****";
-        int maxBufferSize = 1 * 1024 * 1024;
-        byte[] buffer = new byte[maxBufferSize];
-        int bufferLength;
-        loaded = 0;
+    public void progressEnd() {
+        progressUpdate();
+        activity.runOnUiThread(() -> {
 
-        String fileNameUTF8 = new String(fileName.getBytes(), StandardCharsets.ISO_8859_1);
+            notifiManager.cancel(Transfer.NOTIF_SERVICE);
 
-        String type = activity.getContentResolver().getType(uri);
-
-        url = new URL(protocol, host, port, root + "/upload.php");
-
-        url = checkRedirection(url);
-
-        Progress.PreProgress(this);
-
-        if(url != null) {
-
-            Log.d("URL", url.toString());
-
-            conn = (HttpURLConnection) url.openConnection();
-            conn.setDoInput(true); // Allow Inputs
-            conn.setDoOutput(true); // Allow Outputs
-            conn.setUseCaches(false); // Don't use a Cached Copy
-            conn.setChunkedStreamingMode(maxBufferSize);
-            conn.setRequestMethod("POST");
-            conn.setRequestProperty("Connection", "keep-alive");
-            conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
-
-            conn.connect();
-
-            request = new DataOutputStream(conn.getOutputStream());
-
-            request.writeBytes("--" + boundary + "\r\n");
-            request.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\"" + fileNameUTF8 + "\"\r\n");
-            request.writeBytes("Content-Type: " + type + "\r\n\r\n");
-
-            InputStream in = activity.getContentResolver().openInputStream(uri);
-
-            while ((bufferLength = in.read(buffer)) > 0) {
-                request.write(buffer, 0, bufferLength);
-                loaded+= (long) bufferLength;
-                loadedHuman = Transfer.humanReadableByteCountBin(loaded);
-                percent = ((loaded * 100) / fileSize);
-                Progress.ProgressUpdateDelay(this);
+            if (!app_started) {
+                notifBuilder.setSmallIcon(R.drawable.ic_upload_and_download_from_the_cloud)
+                        .setContentTitle(name)
+                        .setContentText(info)
+                        .setProgress(0, 0, false)
+                        .setContentIntent(pendingIntent);
+                notifiManager.notify(id, notifBuilder.build());
             }
 
-            request.writeBytes("\r\n");
-            request.writeBytes("--" + boundary + "--\r\n");
+            System.out.println(message);
+            /*Snackbar.make(Transfer.activity.findViewById(R.id.view_pager), tr.message, Snackbar.LENGTH_LONG)
+                    .setAction("Action", null).show();*/
+            Toast.makeText(activity, message, Toast.LENGTH_SHORT).show();
 
-            in.close();
-
-            int responseCode = conn.getResponseCode();
-
-            if (responseCode == HttpURLConnection.HTTP_OK) {
-                message = "File " + fileName + " successful upload";
-                state = Transfer.STATE_SUCCESS;
-                Progress.PostProgress(this);
-            }
-            else {
-                String s = conn.getResponseMessage();
-                throw new HttpErrorException("HTTP Error code " + responseCode + " " + s);
-            }
-
-            request.flush();
-
-            request.close();
-
-            conn.disconnect();
-        }
-
-        return message;
+        });
     }
 
+    public void showProgressFragment(){
 
-    public File file;
-    public String href;
-    public Button button;
+        LinearLayout groot = fragment_progress.findViewById(R.id.groot);
 
-    public void downloadFile() throws IOException {
-        URL url = null;
-        HttpURLConnection conn = null;
-        int maxBufferSize = 1 * 1024 * 1024;
-        byte[] buffer = new byte[maxBufferSize];
-        int bufferLength;
-        loaded = 0;
+        View progress = groot.findViewById(id);
 
-        Progress.PreProgress(this);
-
-        String[] parts = href.split("/");
-        String path = "";
-        for(int i=0; i< parts.length - 1; i++) {
-            path = path + parts[i] + "/";
-        }
-        String query = URLEncoder.encode(parts[parts.length - 1], StandardCharsets.UTF_8.toString());
-        url = new URL(protocol, host, port, path + query.replace("+", "%20"));
-        conn = (HttpURLConnection) url.openConnection();
-        conn.setDoOutput(true);
-        conn.setRequestMethod("GET");
-        conn.setConnectTimeout(2000);
-
-        Log.d("URL", url.toString());
-
-        conn.connect();
-
-        int responseCode = conn.getResponseCode();
-
-        if (responseCode == HttpURLConnection.HTTP_OK) {
-
-            FileOutputStream fileOutput = new FileOutputStream(file);
-            InputStream in = conn.getInputStream();
-
-            while ((bufferLength = in.read(buffer)) > 0) {
-                fileOutput.write(buffer, 0, bufferLength);
-                loaded+= (long) bufferLength;
-                loadedHuman = Transfer.humanReadableByteCountBin(loaded);
-                percent = ((loaded * 100) / fileSize);
-                Progress.ProgressUpdateDelay(this);
-            }
-            fileOutput.close();
-
-            conn.disconnect();
-
-            message = "File " + fileName + " successful download";
-            state = Transfer.STATE_SUCCESS;
-            Progress.PostProgress(this);
-
-        }
-        else {
-            String s = conn.getResponseMessage();
-            throw new HttpErrorException("HTTP Error code " + responseCode + " " + s);
+        if (progress == null) {
+            progress = inflater.inflate(R.layout.progress, null);
+            progress.setId(id);
+            final View final_progress = progress;
+            activity.runOnUiThread(() -> {
+                groot.addView(final_progress, 0);
+            });
         }
 
-        conn.disconnect();
+        ((ProgressBar) progress.findViewById(R.id.progressBar)).setProgress((int) percent);
+        ((ImageView) progress.findViewById(R.id.transferType)).setImageResource(drawable);
+        ((TextView) progress.findViewById(R.id.progressText)).setText(percent + " %");
+        ((TextView) progress.findViewById(R.id.fileName)).setText(name);
+        ((TextView) progress.findViewById(R.id.fileSize)).setText(String.format("%s/%s", loadedSI, sizeSI));
+
+        if (state == Transfer.STATE_SUCCESS)
+            ((TextView) progress.findViewById(R.id.fileName)).setTextColor(Color.GREEN);
+        else if (state == Transfer.STATE_FAILED)
+            ((TextView) progress.findViewById(R.id.fileName)).setTextColor(Color.RED);
     }
 
-    public static boolean setButton(String name, Button button) {
-
-        for (Object obj: instances) {
-            Transfer tr = (Transfer) obj;
-            if (name.equals(tr.fileName) && tr.state == STATE_RUNNING) {
-                tr.button = button;
-                return true;
-            }
-        }
-        return false;
-    }
-
-    public static String getFileList() throws IOException {
-        URL url = null;
-        HttpURLConnection conn = null;
-
-        String fileList = "";
-        int buf;
-
-        url = new URL(protocol, host, port, root + "/list.php");
-        conn = (HttpURLConnection) url.openConnection();
-        conn.setConnectTimeout(2000);
-
-        conn.connect();
-
-        int responseCode = conn.getResponseCode();
-
-        if (responseCode == HttpURLConnection.HTTP_OK) {
-            InputStreamReader isw = new InputStreamReader(conn.getInputStream());
-
-            while ((buf = isw.read()) > 0) {
-                fileList = fileList + (char) buf;
-            }
-        }
-        else {
-            String s = conn.getResponseMessage();
-            throw new HttpErrorException("HTTP Error code " + responseCode + " " + s);
-        }
-
-        conn.disconnect();
-
-        return fileList;
-    }
-
-    public static String deleteFile(String file) throws IOException {
-
-        URL url = null;
-        HttpURLConnection conn = null;
-
-        String message;
-
-        String query = URLEncoder.encode(file, StandardCharsets.UTF_8.toString());
-        String serverUrl = root + "/delete.php?file=" + query;
-        url = new URL(protocol, host, port, serverUrl);
-        conn = (HttpURLConnection) url.openConnection();
-        conn.setRequestMethod("GET");
-        conn.setConnectTimeout(2000);
-
-        conn.connect();
-
-        int responseCode = conn.getResponseCode();
-
-        if (responseCode == HttpURLConnection.HTTP_OK) {
-
-            message = "File " + file + " successful deleted";
-        }
-        else {
-            String s = conn.getResponseMessage();
-            throw new HttpErrorException("HTTP Error code " + responseCode + " " + s);
-        }
-
-        conn.disconnect();
-
-        return message;
-    }
-
-    private static URL checkRedirection(URL url) throws IOException {
+    static URL checkRedirection(URL url) throws IOException {
         String location = null;
         HttpURLConnection conn = null;
         int responseCode;
@@ -488,18 +304,47 @@ public class Transfer {
         return url;
     }
 
-    public static void error(final String message) {
+    public static String getFileList() throws IOException {
+        URL url = null;
+        HttpURLConnection conn = null;
+
+        String fileList = "";
+        int buf;
+
+        url = new URL(protocol, host, port, root + "/list.php");
+        conn = (HttpURLConnection) url.openConnection();
+        conn.setConnectTimeout(2000);
+
+        conn.connect();
+
+        int responseCode = conn.getResponseCode();
+
+        if (responseCode == HttpURLConnection.HTTP_OK) {
+            InputStreamReader isw = new InputStreamReader(conn.getInputStream());
+
+            while ((buf = isw.read()) > 0) {
+                fileList = fileList + (char) buf;
+            }
+        }
+        else {
+            String s = conn.getResponseMessage();
+            throw new HttpErrorException("error code: " + responseCode + " " + s);
+        }
+
+        conn.disconnect();
+
+        return fileList;
+    }
+
+    private static int timeout;
+
+    public static void errorSnackbar(final String message) {
 
         System.out.println(message);
 
         if (activity != null) {
-            activity.runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    Snackbar.make(activity.findViewById(R.id.view_pager), message, Snackbar.LENGTH_LONG)
-                            .setAction("Action", null).show();
-                }
-            });
+            activity.runOnUiThread(() -> Snackbar.make(activity.findViewById(R.id.view_pager), message, Snackbar.LENGTH_LONG)
+                    .setAction("Action", null).show());
         }
     }
 

app/src/main/java/com/localtransfer/UploadFile.java

@@ -0,0 +1,201 @@
+package com.localtransfer;
+
+import android.database.Cursor;
+import android.net.Uri;
+import android.provider.OpenableColumns;
+import android.util.Log;
+import android.view.View;
+
+import androidx.core.content.FileProvider;
+
+import com.google.android.material.snackbar.Snackbar;
+
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStreamWriter;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.sql.Timestamp;
+import java.text.SimpleDateFormat;
+import java.util.ConcurrentModificationException;
+import java.util.Date;
+
+public class UploadFile extends Transfer {
+
+    public Uri uri;
+
+    public String type;
+
+    public UploadFile() {
+        this.id = View.generateViewId();
+        instances.add(this);
+        info = "Upload complete";
+        state = STATE_NOT_REQUESTED;
+        drawable = R.drawable.ic_upload_24;
+    }
+
+    public static void handleSendFile(Uri uri) {
+        if (uri != null) {
+            UploadFile file = new UploadFile();
+            file.uri = uri;
+
+            Cursor cursor = activity.getContentResolver().query(uri, null, null, null, null);
+            cursor.moveToFirst();
+
+            file.type = activity.getContentResolver().getType(uri);
+
+            int col_name = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
+            if (col_name != -1)
+                file.name = cursor.getString(col_name);
+            if(file.name == null)
+                file.name = file.type.split("/")[0] + "_" + new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()) + "." + file.type.split("/")[1];
+
+            int col_size = cursor.getColumnIndex(OpenableColumns.SIZE);
+            if (col_name != -1) {
+                file.size = cursor.getLong(col_size);
+                file.sizeSI = Transfer.humanReadableByteCountBin(file.size);
+            }
+
+            file.AddTransfer();
+        }
+    }
+
+    public static void handleSendText(String sharedText) {
+        if (sharedText != null) {
+            SimpleDateFormat sdfDate = new SimpleDateFormat("yyyyMMdd_HHmmss");
+            Date now = new Date();
+            String strDate = sdfDate.format(now);
+            Uri uri = null;
+
+            try {
+                File outputFile = new File(activity.getCacheDir(), strDate + ".txt");
+                FileOutputStream fileOut = new FileOutputStream(outputFile);
+                OutputStreamWriter OutWriter = new OutputStreamWriter(fileOut);
+                OutWriter.append(sharedText);
+                OutWriter.close();
+
+                fileOut.flush();
+                fileOut.close();
+
+                uri = FileProvider.getUriForFile(activity, activity.getPackageName(), outputFile);
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+            handleSendFile(uri);
+        }
+    }
+
+    @Override
+    public void startTransfer() {
+        super.startTransfer();
+
+        startedTime = new Timestamp(System.currentTimeMillis());
+
+        state = STATE_RUNNING;
+
+        try {
+            uploadFile();
+        } catch (IOException e) {
+            final String ExceptionName = e.getClass().getSimpleName();
+            final String ExceptionMess = e.getMessage();
+
+            state = Transfer.STATE_FAILED;
+            progressEnd();
+
+            if(ExceptionName != null && ExceptionMess != null) {
+                errorSnackbar(ExceptionMess);
+            }
+
+        }
+    }
+
+    private String uploadFile() throws IOException {
+        String message = null;
+        URL url = null;
+        HttpURLConnection conn = null;
+        DataOutputStream request = null;
+        String boundary = "*****";
+        final int maxBufferSize = 1 * 1024 * 1024;
+        byte[] buffer = new byte[maxBufferSize];
+        int bufferLength;
+        loaded = 0;
+
+        Cursor cursor = activity.getContentResolver().query(uri, null, null, null, null);
+        cursor.moveToFirst();
+
+        String fileNameUTF8 = new String(name.getBytes(), StandardCharsets.ISO_8859_1);
+
+        url = new URL(protocol, host, port, root + "/upload.php");
+
+        url = checkRedirection(url);
+
+        Log.d("URL", url.toString());
+
+        conn = (HttpURLConnection) url.openConnection();
+        conn.setDoInput(true); // Allow Inputs
+        conn.setDoOutput(true); // Allow Outputs
+        conn.setUseCaches(false); // Don't use a Cached Copy
+        conn.setChunkedStreamingMode(maxBufferSize);
+        conn.setRequestMethod("POST");
+        conn.setRequestProperty("Connection", "keep-alive");
+        conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
+
+        conn.connect();
+
+        request = new DataOutputStream(conn.getOutputStream());
+
+        request.writeBytes("--" + boundary + "\r\n");
+        request.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\"" + fileNameUTF8 + "\"\r\n");
+        request.writeBytes("Content-Type: " + type + "\r\n\r\n");
+
+        InputStream in = activity.getContentResolver().openInputStream(uri);
+
+        size = in.available();
+        sizeSI = Transfer.humanReadableByteCountBin(size);
+
+        while ((bufferLength = in.read(buffer)) > 0) {
+            request.write(buffer, 0, bufferLength);
+            loaded+= bufferLength;
+            percent = ((loaded * 100) / size);
+            progressUpdateDelay();
+        }
+
+        request.writeBytes("\r\n");
+        request.writeBytes("--" + boundary + "--\r\n");
+
+        in.close();
+
+        int responseCode = conn.getResponseCode();
+
+        if (responseCode == HttpURLConnection.HTTP_OK) {
+            message = "File " + name + " successful upload";
+            state = Transfer.STATE_SUCCESS;
+            progressEnd();
+        }
+        else {
+            String s = conn.getResponseMessage();
+            throw new HttpErrorException("error code: " + responseCode + " " + s);
+        }
+
+        request.flush();
+
+        request.close();
+
+        conn.disconnect();
+
+        System.out.println(message);
+        if (activity != null) {
+            String finalMessage = message;
+            activity.runOnUiThread(() ->
+                    Snackbar.make(activity.findViewById(R.id.view_pager), finalMessage, Snackbar.LENGTH_LONG)
+                            .setAction("Action", null).show());
+        }
+
+        return message;
+    }
+}

app/src/main/java/com/localtransfer/fragment/DownloadFragment.java

@@ -3,14 +3,10 @@ package com.localtransfer.fragment;
 import android.animation.ObjectAnimator;
 import android.content.ActivityNotFoundException;
 import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.graphics.drawable.Drawable;
-import android.net.Uri;
 import android.os.Bundle;
-
-import androidx.core.content.FileProvider;
-import androidx.fragment.app.Fragment;
-import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-
 import android.os.Environment;
 import android.view.ContextMenu;
 import android.view.Gravity;
@@ -24,10 +20,14 @@ import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.fragment.app.Fragment;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
 import com.google.android.material.snackbar.Snackbar;
-import com.localtransfer.BuildConfig;
 import com.localtransfer.R;
+import com.localtransfer.DownloadFile;
 import com.localtransfer.Transfer;
 
 import org.json.JSONArray;
@@ -35,8 +35,6 @@ import org.json.JSONException;
 import org.json.JSONObject;
 
 import java.io.BufferedReader;
-import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -52,6 +50,7 @@ public class DownloadFragment extends Fragment {
     }
 
     private View root;
+    private LayoutInflater inflater;
 
     public static DownloadFragment newInstance() {
         DownloadFragment fragment = new DownloadFragment();
@@ -68,17 +67,20 @@ public class DownloadFragment extends Fragment {
                              Bundle savedInstanceState) {
         root = inflater.inflate(R.layout.fragment_download, container, false);
 
+        this.inflater = inflater;
+
         new Timer().schedule(new TimerTask() {
             @Override
             public void run() {
-                showFileList();
+                listFile();
             }
         }, 100);
 
         SwipeRefreshLayout refresh = root.findViewById(R.id.refresh);
 
+
         refresh.setOnRefreshListener(() -> {
-            new Thread(() -> showFileList()).start();
+            listFile();
             refresh.setRefreshing(false);
         });
 
@@ -107,21 +109,21 @@ public class DownloadFragment extends Fragment {
     public boolean onContextItemSelected(MenuItem item) {
         if (item.getTitle() == "Delete") {
             LinearLayout fileDesc = (LinearLayout) root.findViewById(item.getItemId());
-            final String file = String.valueOf(fileDesc.getTag(R.id.ID_FILE_NAME));
+            DownloadFile file = (DownloadFile) DownloadFile.getFileById((Integer) fileDesc.getTag(R.id.ID_DOWNLOAD));
             new Thread(() -> {
                 try {
-                    String message = Transfer.deleteFile(file);
+                    String message = file.deleteFile();
                     System.out.println(message);
-                    Transfer.activity.runOnUiThread(() ->
+                    getActivity().runOnUiThread(() ->
                             Snackbar.make(getActivity().findViewById(R.id.view_pager), message, Snackbar.LENGTH_LONG)
                                     .setAction("Action", null).show());
-                    showFileList();
+                    listFile();
                 } catch (IOException e) {
                     String ExceptionName = e.getClass().getSimpleName();
                     String ExceptionMess = e.getMessage();
 
                     if(ExceptionName != null && ExceptionMess != null) {
-                        Transfer.error(ExceptionMess);
+                        Transfer.errorSnackbar(ExceptionMess);
                     }
 
                 }
@@ -133,204 +135,175 @@ public class DownloadFragment extends Fragment {
         return true;
     }
 
-    public void showFileList() {
+    public void listFile() {
+        new Thread(() -> {
+            final TextView title = new TextView(Transfer.activity);
+            final LinearLayout main_layout = root.findViewById(R.id.main_layout);
+            try {
+                String data = Transfer.getFileList();
 
-        final TextView title = new TextView(Transfer.activity);
-        title.setTextSize(18);
-        title.setGravity(Gravity.CENTER);
-        final LinearLayout main_layout = root.findViewById(R.id.main_layout);
-        final LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(getContext().LAYOUT_INFLATER_SERVICE);
+                if (data.equals("[]")) {
+                    title.setTextSize(18);
+                    title.setGravity(Gravity.CENTER);
+                    main_layout.removeAllViews();
+                    main_layout.addView(title);
+                    title.setHeight(1000);
+                    title.setText("No file to download");
+                }
+                else {
 
-        String data = "";
-
-        try {
-            data = Transfer.getFileList();
-        } catch (IOException e) {
-            final String ExceptionName = e.getClass().getSimpleName();
-            final String ExceptionMess = e.getMessage();
-
-            if(ExceptionName != null && ExceptionMess != null) {
-                Transfer.error(ExceptionMess);
-                Transfer.activity.runOnUiThread(() -> {
-                    if(main_layout != null)
+                    getActivity().runOnUiThread(() -> {
                         main_layout.removeAllViews();
-                    if(title != null) {
-                        main_layout.addView(title);
-                        title.setText(ExceptionMess);
-                    }
-                });
-            }
-
-        }
-        if (data.equals("[]")) {
-            Transfer.activity.runOnUiThread(() -> {
-                main_layout.removeAllViews();
-                main_layout.addView(title);
-                title.setHeight(1000);
-                title.setText("No file to download");
-            });
-            return;
-        }
-
-        try {
-
-            JSONArray array;
-            array = new JSONArray(data);
-
-            Transfer.activity.runOnUiThread(() -> {
-                main_layout.removeAllViews();
-                final View line = inflater.inflate(R.layout.horizontal_line, null);
-                main_layout.addView(line);
-            });
-            for (int i = 0; i < array.length(); i++) {
-                JSONObject row = array.getJSONObject(i);
-                final String name = row.getString("name");
-                final String href = row.getString("href");
-                final long size = row.getLong("size");
-                final String mime = row.getString("mime");
-                final String type = row.getString("type");
-
-                Transfer.activity.runOnUiThread(() -> {
-                    title.setText("Choose file to download");
-                    View file_info = inflater.inflate(R.layout.file_info, null);
-                    main_layout.addView(file_info);
-                    ImageView image = file_info.findViewById(R.id.file_image);
-                    TextView viewName = file_info.findViewById(R.id.file_name);
-                    TextView viewType = file_info.findViewById(R.id.file_type);
-                    TextView viewSize = file_info.findViewById(R.id.file_size);
-                    LinearLayout fileDesc = file_info.findViewById(R.id.file_desc);
-                    LinearLayout file_buttons = file_info.findViewById(R.id.file_buttons);
-
-                    fileDesc.setId(View.generateViewId());
-                    file_buttons.setId(View.generateViewId());
-                    file_buttons.setTag(R.id.ID_FILE_BUTTONS, "FOR VISIBILITY");
-
-                    registerForContextMenu(fileDesc);
-                    fileDesc.setTag(R.id.ID_FILE_NAME, name);
-
-                    viewName.setText(name);
-                    viewType.setText(mime);
-                    viewSize.setText(Transfer.humanReadableByteCountBin(size));
-
-                    switch (type) {
-                        case "file-image":
-                            image.setImageResource(R.drawable.ic_icon_image);
-                            break;
-                        case "file-audio":
-                            image.setImageResource(R.drawable.ic_icon_music);
-                            break;
-                        case "file-video":
-                            image.setImageResource(R.drawable.ic_icon_video);
-                            break;
-                        default:
-                            image.setImageResource(R.drawable.ic_icon_file);
-                    }
-
-                    fileDesc.setOnClickListener(view -> {
-                        String save_location;
-
-                        if (mime.equals("text/plain"))
-                            save_location = getContext().getCacheDir().toString();
-                        else
-                            save_location = Environment.getExternalStorageDirectory() + "/" + Transfer.local_storage;
-
-                        File file = new File(save_location, name);
-
-                        file_buttons.setId(View.generateViewId());
-
-                        Button Bview = file_buttons.findViewById(R.id.file_view);
-                        Button Bshare = file_buttons.findViewById(R.id.file_share);
-                        Button dl = file_buttons.findViewById(R.id.file_download);
-
-                        dl.setOnClickListener(ListenerDL);
-                        Bview.setOnClickListener(ListenerView);
-                        Bshare.setOnClickListener(ListenerShare);
-
-                        if (file.exists() && file.length() == size) {
-                            Bview.setVisibility(LinearLayout.VISIBLE);
-                            Bshare.setVisibility(LinearLayout.VISIBLE);
-                            dl.setVisibility(LinearLayout.GONE);
-                        }
-                        else {
-                            dl.setVisibility(LinearLayout.VISIBLE);
-                            Bview.setVisibility(LinearLayout.GONE);
-                            Bshare.setVisibility(LinearLayout.GONE);
-                        }
-
-                        if (Transfer.setButton(name, dl)) {
-                            dl.setEnabled(false);
-                            final Drawable spinner = Transfer.activity.getDrawable(R.drawable.ic_spinner_rotate);
-                            int h = spinner.getIntrinsicHeight();
-                            int w = spinner.getIntrinsicWidth();
-                            spinner.setBounds(0, 0, w, h);
-                            dl.setCompoundDrawables(dl.getCompoundDrawables()[0], null, spinner, null);
-                            ObjectAnimator anim = ObjectAnimator.ofInt(spinner, "level", 0, 10000);
-                            anim.setDuration(1000);
-                            anim.setRepeatCount(Animation.INFINITE);
-                            anim.setInterpolator(new LinearInterpolator());
-                            anim.start();
-                        }
-
-                        file_buttons.setTag(R.id.ID_FILE_NAME, name);
-                        file_buttons.setTag(R.id.ID_FILE_SIZE, size);
-                        file_buttons.setTag(R.id.ID_FILE_HREF, href);
-                        file_buttons.setTag(R.id.ID_FILE_MIME, mime);
-                        file_buttons.setTag(R.id.ID_SAVE_LOCATION, save_location);
-                        int state = file_buttons.getVisibility();
-                        if(state == LinearLayout.GONE) {
-                            for(View child : getAllChildren(main_layout)) {
-                                if(child.getTag(R.id.ID_FILE_BUTTONS) != null)
-                                    child.setVisibility(LinearLayout.GONE);
-                            }
-                            file_buttons.setVisibility(LinearLayout.VISIBLE);
-                        }
-                        else if(state == LinearLayout.VISIBLE)
-                            file_buttons.setVisibility(LinearLayout.GONE);
+                        final View line = inflater.inflate(R.layout.horizontal_line, null);
+                        main_layout.addView(line);
                     });
 
-                });
+                    try {
+                        JSONArray array = new JSONArray(data);
+                        for (int i = 0; i < array.length(); i++) {
+                            Integer id = View.generateViewId();
+                            DownloadFile trFile = new DownloadFile(id);
+
+                            JSONObject row = array.getJSONObject(i);
+                            trFile.name = row.getString("name");
+                            trFile.size = row.getLong("size");
+                            trFile.href = row.getString("href");
+                            trFile.mime = row.getString("mime");
+                            trFile.type = row.getString("type");
+
+                            getActivity().runOnUiThread(() -> showFileList(trFile));
+
+                        }
+                    } catch (JSONException e) {
+                        e.printStackTrace();
+                    }
+                }
+            } catch (IOException e) {
+                final String ExceptionName = e.getClass().getSimpleName();
+                final String ExceptionMess = e.getMessage();
+
+                if(ExceptionName != null && ExceptionMess != null) {
+                    Transfer.errorSnackbar(ExceptionMess);
+                }
+
             }
-        } catch (JSONException e) {
-            e.printStackTrace();
+        }).start();
+    }
+
+    private void setThumbnail(DownloadFile file, ImageView image) {
+        new Thread(() -> {
+            InputStream thumbnail = file.getThumbnail();
+            Bitmap bitmap = BitmapFactory.decodeStream(thumbnail);
+            getActivity().runOnUiThread(() -> {
+                image.setImageBitmap(bitmap);
+            });
+        }).start();
+    }
+
+    private void showFileList(DownloadFile trFile) {
+
+        final LinearLayout main_layout = root.findViewById(R.id.main_layout);
+
+        View file_info = inflater.inflate(R.layout.file_info, null);
+        main_layout.addView(file_info);
+        ImageView image = file_info.findViewById(R.id.file_image);
+        TextView viewName = file_info.findViewById(R.id.file_name);
+        TextView viewType = file_info.findViewById(R.id.file_type);
+        TextView viewSize = file_info.findViewById(R.id.file_size);
+        LinearLayout fileDesc = file_info.findViewById(R.id.file_desc);
+        LinearLayout file_buttons = file_info.findViewById(R.id.file_buttons);
+
+        fileDesc.setId(View.generateViewId());
+
+        registerForContextMenu(fileDesc);
+
+        file_buttons.setId(trFile.getId());
+        file_buttons.setTag(R.id.ID_DOWNLOAD, trFile.getId());
+        fileDesc.setTag(R.id.ID_DOWNLOAD, trFile.getId());
+        file_buttons.setTag(R.id.ID_FILE_BUTTONS, "FOR VISIBILITY");
+
+
+        trFile.setButton(file_buttons.findViewById(R.id.file_download));
+
+        viewName.setText(trFile.name);
+        viewType.setText(trFile.mime);
+        viewSize.setText(Transfer.humanReadableByteCountBin(trFile.size));
+
+        switch (trFile.type) {
+            case "file-image":
+                image.setImageResource(R.drawable.ic_icon_image);
+                setThumbnail(trFile, image);
+                break;
+            case "file-video":
+                image.setImageResource(R.drawable.ic_icon_video);
+                setThumbnail(trFile, image);
+                break;
+            case "file-audio":
+                image.setImageResource(R.drawable.ic_icon_music);
+                break;
+            default:
+                image.setImageResource(R.drawable.ic_icon_file);
         }
+
+        fileDesc.setOnClickListener(view -> {
+
+            Button Bview = file_buttons.findViewById(R.id.file_view);
+            Button Bshare = file_buttons.findViewById(R.id.file_share);
+            Button Bdownload = file_buttons.findViewById(R.id.file_download);
+
+            Bdownload.setOnClickListener(ListenerDL);
+            Bview.setOnClickListener(ListenerView);
+            Bshare.setOnClickListener(ListenerShare);
+
+            if (trFile.exist(getContext())) {
+                Bview.setVisibility(LinearLayout.VISIBLE);
+                Bshare.setVisibility(LinearLayout.VISIBLE);
+                Bdownload.setVisibility(LinearLayout.GONE);
+            }
+            else {
+                Bdownload.setVisibility(LinearLayout.VISIBLE);
+                Bview.setVisibility(LinearLayout.GONE);
+                Bshare.setVisibility(LinearLayout.GONE);
+            }
+
+            trFile.setButton(Bdownload);
+
+            int state = file_buttons.getVisibility();
+            if(state == LinearLayout.GONE) {
+                for(View child : getAllChildren(main_layout)) {
+                    if(child.getTag(R.id.ID_FILE_BUTTONS) != null)
+                        child.setVisibility(LinearLayout.GONE);
+                }
+                file_buttons.setVisibility(LinearLayout.VISIBLE);
+            }
+            else if(state == LinearLayout.VISIBLE)
+                file_buttons.setVisibility(LinearLayout.GONE);
+        });
     }
 
     private View.OnClickListener ListenerDL = v -> {
         v.setEnabled(false);
         final LinearLayout layout = (LinearLayout) v.getParent();
-        final Button button = layout.findViewById(R.id.file_download);
+        final Button button = (Button) v;
+        button.setText(String.format("Download pending"));
 
-        final String name = (String) layout.getTag(R.id.ID_FILE_NAME);
-        final String save_location = String.valueOf(layout.getTag(R.id.ID_SAVE_LOCATION));
-        final long fileSize = (long) layout.getTag(R.id.ID_FILE_SIZE);
-        final String href = (String) layout.getTag(R.id.ID_FILE_HREF);
+        final Integer id = (Integer) layout.getTag(R.id.ID_DOWNLOAD);
 
-        new File(save_location).mkdirs();
-        File file = new File(save_location, name);
-
-        Transfer tr = new Transfer(Transfer.TYPE_DOWNLOAD);
-        tr.file = file;
-        tr.fileName = name;
-        tr.fileSize = fileSize;
-        tr.fileSizeHuman = Transfer.humanReadableByteCountBin(fileSize);
-        tr.href = href;
-        tr.button = button;
-        tr.AddTransfer();
+        DownloadFile file = (DownloadFile) DownloadFile.getFileById(id);
+        file.sizeSI = Transfer.humanReadableByteCountBin(file.size);
+        file.AddTransfer();
     };
 
     private View.OnClickListener ListenerShare = v -> {
         LinearLayout layout = (LinearLayout) v.getParent();
-        final String name = (String) layout.getTag(R.id.ID_FILE_NAME);
-        final String type = (String) layout.getTag(R.id.ID_FILE_MIME);
+        final Integer id = (Integer) layout.getTag(R.id.ID_DOWNLOAD);
 
-        final String save_location = String.valueOf(layout.getTag(R.id.ID_SAVE_LOCATION));
-        File file = new File(save_location, name);
-        Uri uri = FileProvider.getUriForFile(getContext(), BuildConfig.APPLICATION_ID, file);
+        DownloadFile dl = (DownloadFile) DownloadFile.getFileById(id);
 
-        if(type.equals("text/plain")) {
+        if(dl.mime.equals("text/plain")) {
             String text = null;
             try {
-                InputStream is = new FileInputStream(file);
+                InputStream is = getActivity().getContentResolver().openInputStream(dl.uri);
                 BufferedReader buf = new BufferedReader(new InputStreamReader(is));
 
                 String line;
@@ -348,47 +321,43 @@ public class DownloadFragment extends Fragment {
 
             try {
                 Intent intent = new Intent(Intent.ACTION_SEND);
-                intent.setType(type);
+                intent.setType(dl.mime);
                 intent.putExtra(Intent.EXTRA_TEXT, text);
                 startActivity(Intent.createChooser(intent, getString(R.string.share_title)));
             } catch (ActivityNotFoundException e) {
                 e.printStackTrace();
+                Toast.makeText(getActivity(), "Can't share " + dl.mime, Toast.LENGTH_SHORT).show();
             }
         }
         else {
             try {
                 Intent intent = new Intent(Intent.ACTION_SEND);
-                intent.putExtra(Intent.EXTRA_STREAM, uri);
-                intent.setType(type);
+                intent.putExtra(Intent.EXTRA_STREAM, dl.uri);
+                intent.setType(dl.mime);
                 intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                 startActivity(Intent.createChooser(intent, getString(R.string.share_title)));
             } catch (ActivityNotFoundException e) {
                 e.printStackTrace();
+                Toast.makeText(getActivity(), "Can't share " + dl.mime, Toast.LENGTH_SHORT).show();
             }
         }
-
-
     };
 
     private View.OnClickListener ListenerView = v -> {
         LinearLayout layout = (LinearLayout) v.getParent();
-        final String name = (String) layout.getTag(R.id.ID_FILE_NAME);
-        final String type = (String) layout.getTag(R.id.ID_FILE_MIME);
+        final Integer id = (Integer) layout.getTag(R.id.ID_DOWNLOAD);
 
-        final String save_location = String.valueOf(layout.getTag(R.id.ID_SAVE_LOCATION));
-        File file = new File(save_location, name);
-        Uri uri = FileProvider.getUriForFile(getContext(), BuildConfig.APPLICATION_ID, file);
+        DownloadFile dl = (DownloadFile) DownloadFile.getFileById(id);
 
         try {
             Intent intent = new Intent(Intent.ACTION_VIEW);
-            intent.setDataAndType(uri, type);
+            intent.setDataAndType(dl.uri, dl.mime);
             intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
             startActivity(intent);
         } catch (ActivityNotFoundException e) {
             e.printStackTrace();
+            Toast.makeText(getActivity(), "No " + dl.mime + " viewer", Toast.LENGTH_SHORT).show();
         }
-
-
     };
 
     private List<View> getAllChildren(View v) {

app/src/main/java/com/localtransfer/fragment/ProgressFragment.java

@@ -2,26 +2,16 @@ package com.localtransfer.fragment;
 
 import android.os.Bundle;
 
-import androidx.core.app.NotificationCompat;
-import androidx.core.app.NotificationManagerCompat;
 import androidx.fragment.app.Fragment;
 
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.LinearLayout;
-import android.widget.ProgressBar;
-import android.widget.TextView;
 
-import com.localtransfer.Progress;
 import com.localtransfer.R;
 import com.localtransfer.Transfer;
 
-import java.util.ConcurrentModificationException;
 import java.util.List;
-import java.util.Timer;
-import java.util.TimerTask;
 
 public class ProgressFragment extends Fragment {
 
@@ -43,21 +33,20 @@ public class ProgressFragment extends Fragment {
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
-        Progress.root = inflater.inflate(R.layout.fragment_progress, container, false);
+        Transfer.fragment_progress = inflater.inflate(R.layout.fragment_progress, container, false);
 
-        return Progress.root;
+        return Transfer.fragment_progress;
     }
 
     @Override
     public void onResume(){
         super.onResume();
 
-        Progress.fragment_on = true;
+        Transfer.fragment_on = true;
 
-        List instances = Transfer.getInstances();
-        for (Object obj: instances) {
-            Transfer tr = (Transfer) obj;
-            Progress.showProgressFragment(tr);
+        List<Transfer> instances = Transfer.getInstances();
+        for (Transfer file: instances) {
+            file.showProgressFragment();
         }
     }
 
@@ -65,6 +54,6 @@ public class ProgressFragment extends Fragment {
     public void onPause(){
         super.onPause();
 
-        Progress.fragment_on = false;
+        Transfer.fragment_on = false;
     }
 }

app/src/main/res/values/ids.xml

@@ -1,9 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <item name="ID_FILE_NAME" type="id" />
-    <item name="ID_FILE_SIZE" type="id" />
-    <item name="ID_FILE_HREF" type="id" />
-    <item name="ID_FILE_MIME" type="id" />
-    <item name="ID_SAVE_LOCATION" type="id" />
+    <item name="ID_DOWNLOAD" type="id" />
     <item name="ID_FILE_BUTTONS" type="id" />
 </resources>

app/src/main/res/values/strings.xml

@@ -25,13 +25,14 @@
     <string name="server_protocol">Use secure https</string>
     <string name="server_host_def">www.netdldata.net</string>
     <string name="server_port">Port</string>
-    <string name="server_port_def">80</string>
+    <string name="server_port_def"></string>
     <string name="server_root">Root</string>
     <string name="server_root_def">/transfer</string>
 
     <!-- Local Preferences -->
-    <string name="local_storage">Local Storage</string>
-    <string name="local_storage_def">Download/TransferLocal</string>
+    <string name="use_shared_storage">Use shared storage</string>
+    <string name="shared_storage">Shared Storage</string>
+    <string name="shared_storage_def">Download/TransferLocal</string>
 
     <!-- File buttons -->
     <string name="file_share">Share</string>

app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">netdldata.net</domain>
+    </domain-config>
+</network-security-config>

app/src/main/res/xml/root_preferences.xml

@@ -31,11 +31,17 @@
 
     <PreferenceCategory app:title="@string/local_header">
 
+        <SwitchPreference
+            android:defaultValue="false"
+            android:key="use_shared_storage"
+            android:title="@string/use_shared_storage" />
+
         <Preference
-            app:key="local_storage"
-            app:title="@string/local_storage"
-            app:defaultValue="@string/local_storage_def"
-            app:useSimpleSummaryProvider="true" />
+            app:key="shared_storage"
+            app:title="@string/shared_storage"
+            app:defaultValue="@string/shared_storage_def"
+            app:useSimpleSummaryProvider="true"
+            app:isPreferenceVisible="false"/>
 
     </PreferenceCategory>
 

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.2'
+        classpath 'com.android.tools.build:gradle:7.1.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip