Foreground Service Integration

- Add Foreground Service
- Reviewed Progress Method
- Reviewed Transfer Object Integration
- Fix Some Error

app/build.gradle

@@ -9,7 +9,7 @@ android {
         minSdkVersion 24
         targetSdkVersion 30
         versionCode 1
-        versionName "1.0"
+        versionName "2.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

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

@@ -78,16 +78,14 @@ public class MainActivity extends AppCompatActivity {
         String action = intent.getAction();
         String type = intent.getType();
 
-        Transfer tr = new Transfer();
-
         if (Intent.ACTION_SEND.equals(action) && type != null) {
             viewPager.setCurrentItem(2);
             if ("text/plain".equals(type)) {
                 String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
-                tr.handleSendText(sharedText);
+                Transfer.handleSendText(sharedText);
             } else {
                 Uri uri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
-                tr.handleSendFile(uri);
+                Transfer.handleSendFile(uri);
             }
         } else if (Intent.ACTION_SEND_MULTIPLE.equals(action) && type != null) {
             viewPager.setCurrentItem(2);
@@ -95,7 +93,7 @@ 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) tr.handleSendFile(uri);
+                for(Uri uri : fileUris) Transfer.handleSendFile(uri);
         }
 
     }
@@ -110,11 +108,10 @@ public class MainActivity extends AppCompatActivity {
             ViewPager viewPager = this.findViewById(R.id.view_pager);
             viewPager.setCurrentItem(2);
 
-            Transfer tr = new Transfer();
 
             if (type != null) {
                 String sharedText = data.getStringExtra(Intent.EXTRA_TEXT);
-                tr.handleSendText(sharedText);
+                Transfer.handleSendText(sharedText);
             }
             else {
                 ArrayList<Uri> fileUris = new ArrayList<>();
@@ -130,7 +127,7 @@ public class MainActivity extends AppCompatActivity {
                     fileUris.add(uri);
                 }
                 for (Uri uri : fileUris) {
-                    tr.handleSendFile(uri);
+                    Transfer.handleSendFile(uri);
                 }
             }
         }

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

@@ -1,32 +1,29 @@
 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.widget.Button;
+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.NotificationCompat;
 import androidx.core.app.NotificationManagerCompat;
-import androidx.core.content.ContextCompat;
 
-import java.util.ArrayList;
+import com.google.android.material.snackbar.Snackbar;
+
 import java.util.ConcurrentModificationException;
-import java.util.List;
-import java.util.Timer;
-import java.util.TimerTask;
 
 public class Progress {
 
-    public static final int UPLOAD = 1000;
-    public static final int DOWNLOAD = 1001;
-
-
     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);
@@ -34,163 +31,131 @@ public class Progress {
     private static Intent notificationIntent = new Intent(Transfer.activity, MainActivity.class);
     private static PendingIntent pendingIntent = PendingIntent.getActivity(Transfer.activity,0, notificationIntent, 0);
 
-    private static List<Progress> instances = new ArrayList<>();
-
-    private Integer id;
-    private String name;
-
-    private long size;
-    private String HumanSize;
-
-    public long loaded;
-    private String HumanLoaded;
-
-    public long percent;
-
     public static View root;
     public static boolean fragment_on = false;
     public static boolean app_started = false;
 
-    private Timer timer = new Timer();
+    private static long	savedTimeMillis;
-    private int drawable;
-    private String info;
 
-    public Button button;
+    public static void PreProgress(Transfer tr) {
-    private boolean run;
+        Transfer.activity.runOnUiThread(new Runnable() {
-
-    public Progress(String name, long size, int type) {
-
-        instances.add(this);
-
-        run = true;
-
-        this.name = name;
-        this.size = size;
-        this.HumanSize = Transfer.humanReadableByteCountBin(size);
-
-        id = View.generateViewId();
-
-        switch (type) {
-            case Progress.DOWNLOAD:
-                drawable = R.drawable.ic_download_24;
-                info = "Download complete";
-                break;
-            case Progress.UPLOAD:
-                drawable = R.drawable.ic_upload_24;
-                info = "Upload complete";
-                break;
-            default:
-                throw new IllegalStateException("Unexpected value: " + type);
-        }
-
-        Intent serviceIntent = new Intent(Transfer.activity, TransferService.class);
-        serviceIntent.putExtra("id", id);
-        ContextCompat.startForegroundService(Transfer.activity, serviceIntent);
-
-        timer.schedule(new TimerTask() {
             @Override
             public void run() {
-                showProgress();
-            }
-        }, 0, 1000);
-    }
 
-    public static List getInstances() {
+                final Drawable image = Transfer.activity.getDrawable(R.drawable.ic_spinner_rotate);
-        return instances;
-    }
 
-    public void stopProgress() {
+                if(tr.button != null) {
-        timer.cancel();
+                    int h = image.getIntrinsicHeight();
-        showProgress();
+                    int w = image.getIntrinsicWidth();
-
+                    image.setBounds(0, 0, w, h);
-        run = false;
+                    tr.button.setCompoundDrawables(tr.button.getCompoundDrawables()[0], null, image, null);
-
+                    ObjectAnimator anim = ObjectAnimator.ofInt(image, "level", 0, 10000);
-        Intent serviceIntent = new Intent(Transfer.activity, TransferService.class);
+                    anim.setDuration(1000);
-        Transfer.activity.stopService(serviceIntent);
+                    anim.setRepeatCount(Animation.INFINITE);
-
+                    anim.setInterpolator(new LinearInterpolator());
-        if(! app_started) {
+                    anim.start();
-            bl.setSmallIcon(R.drawable.ic_upload_and_download_from_the_cloud)
-                    .setContentTitle(name)
-                    .setContentText(info)
-                    .setProgress(0, 0, false)
-                    .setContentIntent(pendingIntent);
-            notifiManager.notify(id, bl.build());
-        }
-
-    }
-
-    public void delete() {
-        instances.remove(this);
-    }
-
-    public static Progress getProgress(int id) {
-
-        for (Object obj: instances) {
-            Progress p = (Progress) obj;
-            if (p.id == id) return p;
-        }
-        return null;
-    }
-
-    public static boolean setButton(String name, Button button) {
-
-        for (Object obj: instances) {
-            Progress p = (Progress) obj;
-            if (name.equals(p.name) && p.run) {
-                p.button = button;
-                return true;
                 }
             }
-        return false;
+        });
     }
 
-    private void showProgress(){
+    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 {
 
-            HumanLoaded = Transfer.humanReadableByteCountBin(loaded);
-
                     bl.setSmallIcon(R.drawable.ic_upload_and_download_from_the_cloud)
-                    .setContentTitle(name)
+                            .setContentTitle(tr.fileName)
-                    .setContentText(String.format("%d%% %s/%s", percent, HumanLoaded, HumanSize))
+                            .setContentText(String.format("%d%% %s/%s", tr.percent, tr.loadedHuman, tr.fileSizeHuman))
-                    .setProgress(100, (int) percent, false)
+                            .setProgress(100, (int) tr.percent, false)
                             .setContentIntent(pendingIntent);
-            notifiManager.notify(id, bl.build());
+                    notifiManager.notify(Transfer.NOTIF_SERVICE, bl.build());
 
-            if(app_started && fragment_on) {
+                    if (app_started && fragment_on)
-                showProgressFragment();
+                        showProgressFragment(tr);
-
-            }
 
                 } catch (ConcurrentModificationException e) {
                     e.printStackTrace();
                 }
-
+            }
+        });
     }
 
-    public void showProgressFragment(){
+    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(id) != null) {
+        if (groot.findViewById(tr.id) != null) {
-            progress = groot.findViewById(id);
+            progress = groot.findViewById(tr.id);
         } else {
             progress = inflater.inflate(R.layout.progress, null);
-            progress.setId(id);
+            progress.setId(tr.id);
             Transfer.activity.runOnUiThread(() -> {
                 groot.addView(progress, 0);
             });
         }
 
-        Transfer.activity.runOnUiThread(() -> {
+        ((ProgressBar) progress.findViewById(R.id.progressBar)).setProgress((int) tr.percent);
-            ((ProgressBar) progress.findViewById(R.id.progressBar)).setProgress((int) percent);
+        ((ImageView) progress.findViewById(R.id.transferType)).setImageResource(tr.drawable);
-            ((ImageView) progress.findViewById(R.id.transferType)).setImageResource(drawable);
+        ((TextView) progress.findViewById(R.id.progressText)).setText(tr.percent + " %");
-            ((TextView) progress.findViewById(R.id.progressText)).setText(percent + " %");
+        ((TextView) progress.findViewById(R.id.fileName)).setText(tr.fileName);
-            ((TextView) progress.findViewById(R.id.fileName)).setText(name);
+        ((TextView) progress.findViewById(R.id.fileSize)).setText(String.format("%s/%s", tr.loadedHuman, tr.fileSizeHuman));
-            ((TextView) progress.findViewById(R.id.fileSize)).setText(String.format("%s/%s", HumanLoaded, HumanSize));
-        });
 
+        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/Transfer.java

@@ -1,25 +1,19 @@
 package com.localtransfer;
 
-import android.animation.ObjectAnimator;
 import android.app.Activity;
 import android.content.Context;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.database.Cursor;
-import android.graphics.drawable.Drawable;
 import android.net.Uri;
-import android.os.Parcel;
-import android.os.Parcelable;
 import android.provider.OpenableColumns;
 import android.util.Log;
 import android.view.View;
-import android.view.animation.Animation;
-import android.view.animation.LinearInterpolator;
 import android.widget.Button;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
-import androidx.core.app.NotificationCompat;
+import androidx.core.content.ContextCompat;
-import androidx.core.app.NotificationManagerCompat;
 import androidx.core.content.FileProvider;
 import androidx.preference.PreferenceManager;
 
@@ -32,7 +26,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
-import java.io.Serializable;
 import java.net.HttpURLConnection;
 import java.net.ProtocolException;
 import java.net.URL;
@@ -41,6 +34,7 @@ import java.nio.charset.StandardCharsets;
 import java.text.CharacterIterator;
 import java.text.SimpleDateFormat;
 import java.text.StringCharacterIterator;
+import java.util.ArrayList;
 import java.util.ConcurrentModificationException;
 import java.util.Date;
 import java.util.List;
@@ -59,6 +53,127 @@ public class Transfer {
 
     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 long loaded;
+    public String loadedHuman = "0";
+    public long percent;
+
+    public Transfer(int type) {
+
+        id = View.generateViewId();
+
+        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);
+        }
+
+        state = STATE_STANDBY;
+        this.type = type;
+
+    }
+
+    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();
+        }
+    }
+
+    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 static void parameter(Context context) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
 
@@ -72,7 +187,267 @@ public class Transfer {
             protocol = "http";
     }
 
-    private URL checkRedirection(URL url) throws IOException {
+    public Uri uri;
+
+    public static void handleSendFile(Uri uri) {
+        if (uri != null) {
+            Transfer tr = new Transfer(Transfer.TYPE_UPLOAD);
+            tr.uri = uri;
+
+            Cursor cursor = activity.getContentResolver().query(uri, null, null, null, null);
+            cursor.moveToFirst();
+
+            tr.fileName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
+            tr.fileSize = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
+            tr.fileSizeHuman = Transfer.humanReadableByteCountBin(tr.fileSize);
+
+            tr.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);
+        }
+    }
+
+    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;
+
+        String fileNameUTF8 = new String(fileName.getBytes(), StandardCharsets.ISO_8859_1);
+
+        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);
+            }
+
+            request.writeBytes("\r\n");
+            request.writeBytes("--" + boundary + "--\r\n");
+
+            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 File file;
+    public String href;
+    public Button button;
+
+    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;
+
+        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);
+        }
+
+        conn.disconnect();
+    }
+
+    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 {
         String location = null;
         HttpURLConnection conn = null;
         int responseCode;
@@ -113,332 +488,19 @@ public class Transfer {
         return url;
     }
 
-    public void handleSendFile(Uri uri) {
+    public static void error(final String message) {
-        if (uri != null) {
-            new Thread(() -> {
-                try {
-                    uploadFile(uri);
-                } catch (IOException e) {
-                    final String ExceptionName = e.getClass().getSimpleName();
-                    final String ExceptionMess = e.getMessage();
-
-                    if(ExceptionName != null && ExceptionMess != null) {
-                        Transfer.error(ExceptionName + ": " + ExceptionMess, null, null);
-                    }
-
-                }
-            }).start();
-        }
-    }
-
-    public void handleSendText(String sharedText) {
-        if (sharedText != null) {
-            SimpleDateFormat sdfDate = new SimpleDateFormat("yyyyMMdd_HHmmss");
-            Date now = new Date();
-            String strDate = sdfDate.format(now);
-            new Thread(() -> {
-                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 uri = FileProvider.getUriForFile(activity, activity.getPackageName(), outputFile);
-
-                    uploadFile(uri);
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            }).start();
-        }
-    }
-
-    public String uploadFile(Uri uri) throws IOException {
-        String message = null;
-        URL url = null;
-        HttpURLConnection conn = null;
-        DataOutputStream request = null;
-        String boundary = "*****";
-        int maxBufferSize = 1 * 1024 * 1024;
-        byte[] buffer = new byte[maxBufferSize];
-        int bufferLength;
-        long loaded = 0;
-
-        Cursor cursor = activity.getContentResolver().query(uri, null, null, null, null);
-        cursor.moveToFirst();
-        String fileName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
-        String fileNameUTF8 = new String(fileName.getBytes(), StandardCharsets.ISO_8859_1);
-        long fileSize = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
-        String type = activity.getContentResolver().getType(uri);
-
-        url = new URL(protocol, host, port, root + "/upload.php");
-
-        url = checkRedirection(url);
-
-        Progress p = new Progress(fileName, fileSize, Progress.UPLOAD);
-
-        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;
-                p.loaded = loaded;
-                p.percent = ((loaded * 100) / fileSize);
-            }
-
-            request.writeBytes("\r\n");
-            request.writeBytes("--" + boundary + "--\r\n");
-
-            in.close();
-
-            int responseCode = conn.getResponseCode();
-
-            if (responseCode == HttpURLConnection.HTTP_OK) {
-                message = "File " + fileName + " successful upload";
-                p.stopProgress();
-            }
-            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;
-    }
-
-    public 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;
-    }
-
-    public void downloadFile(final File file, String name, long fileSize, String href, Button button) throws IOException {
-
-        /*final LinearLayout layout = activity.findViewById(id);
-        final Button button;
-        if(layout != null)
-            button = layout.findViewById(R.id.file_download);
-        else
-            button = null;*/
-
-        URL url = null;
-        HttpURLConnection conn = null;
-        int maxBufferSize = 1 * 1024 * 1024;
-        byte[] buffer = new byte[maxBufferSize];
-        int bufferLength;
-        long loaded = 0;
-
-        final Drawable image = activity.getDrawable(R.drawable.ic_spinner_rotate);
-
-        Progress p = new Progress(name, fileSize, Progress.DOWNLOAD);
-        if(button != null)
-            p.button = button;
-
-        if(p.button != null) {
-            activity.runOnUiThread(() -> {
-                int h = image.getIntrinsicHeight();
-                int w = image.getIntrinsicWidth();
-                image.setBounds(0, 0, w, h);
-                p.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();
-            });
-        }
-
-        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;
-                p.loaded = loaded;
-                p.percent = ((loaded * 100) / fileSize);
-                if(Progress.app_started && p.button != null)
-                    activity.runOnUiThread(() -> p.button.setText(String.format("Download in progress %d%%", p.percent)));
-            }
-            fileOutput.close();
-
-            conn.disconnect();
-
-            p.stopProgress();
-
-            if(p.button != null) {
-                activity.runOnUiThread(() -> {
-                    final LinearLayout layout = (LinearLayout) p.button.getParent();
-                    layout.findViewById(R.id.file_view).setVisibility(LinearLayout.VISIBLE);
-                    layout.findViewById(R.id.file_share).setVisibility(LinearLayout.VISIBLE);
-                    p.button.setVisibility(LinearLayout.GONE);
-                    p.button.setEnabled(true);
-
-                    p.button.setText(activity.getString(R.string.file_download));
-                    p.button.setCompoundDrawables(p.button.getCompoundDrawables()[0], null, null, null);
-                });
-            }
-            activity.runOnUiThread(() -> {
-                String message = "File " + name + " successful download";
-                System.out.println(message);
-                Snackbar.make(activity.findViewById(R.id.view_pager), message, Snackbar.LENGTH_LONG)
-                        .setAction("Action", null).show();
-            });
-        }
-        else {
-            String s = conn.getResponseMessage();
-            throw new HttpErrorException("error code: " + responseCode + " " + s);
-        }
-
-        conn.disconnect();
-    }
-
-    public 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("error code: " + responseCode + " " + s);
-        }
-
-        conn.disconnect();
-
-        return message;
-    }
-
-    private static int timeout;
-
-    public static void error(final String message, final TextView title, final LinearLayout layout) {
 
         System.out.println(message);
 
-        if (timeout == 0) {
         if (activity != null) {
             activity.runOnUiThread(new Runnable() {
                 @Override
                 public void run() {
-                        if(layout != null)
-                            layout.removeAllViews();
-                        if(title != null) {
-                            layout.addView(title);
-                            title.setText(message);
-                        }
                     Snackbar.make(activity.findViewById(R.id.view_pager), message, Snackbar.LENGTH_LONG)
                             .setAction("Action", null).show();
                 }
             });
         }
-            timeout = 1;
-            new Timer().schedule(new TimerTask() {
-                @Override
-                public void run() {
-                    timeout = 0;
-                }
-            }, 3000);
-        }
     }
 
     public static String humanReadableByteCountBin(long bytes) {

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

@@ -17,7 +17,6 @@ public class TransferService extends Service {
 
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
-        int id = intent.getIntExtra("id", 0);
 
         Intent notificationIntent = new Intent(this, MainActivity.class);
         PendingIntent pendingIntent = PendingIntent.getActivity(this,
@@ -27,7 +26,7 @@ public class TransferService extends Service {
                 .setContentIntent(pendingIntent)
                 .build();
 
-        startForeground(id, notification);
+        startForeground(Transfer.NOTIF_SERVICE, notification);
 
         //do heavy work on a background thread
         //stopSelf();

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

@@ -27,7 +27,6 @@ import android.widget.TextView;
 
 import com.google.android.material.snackbar.Snackbar;
 import com.localtransfer.BuildConfig;
-import com.localtransfer.Progress;
 import com.localtransfer.R;
 import com.localtransfer.Transfer;
 
@@ -111,8 +110,7 @@ public class DownloadFragment extends Fragment {
             final String file = String.valueOf(fileDesc.getTag(R.id.ID_FILE_NAME));
             new Thread(() -> {
                 try {
-                    Transfer tr = new Transfer();
+                    String message = Transfer.deleteFile(file);
-                    String message = tr.deleteFile(file);
                     System.out.println(message);
                     Transfer.activity.runOnUiThread(() ->
                             Snackbar.make(getActivity().findViewById(R.id.view_pager), message, Snackbar.LENGTH_LONG)
@@ -123,7 +121,7 @@ public class DownloadFragment extends Fragment {
                     String ExceptionMess = e.getMessage();
 
                     if(ExceptionName != null && ExceptionMess != null) {
-                        Transfer.error(ExceptionName + ": " + ExceptionMess, null, null);
+                        Transfer.error(ExceptionMess);
                     }
 
                 }
@@ -143,18 +141,24 @@ public class DownloadFragment extends Fragment {
         final LinearLayout main_layout = root.findViewById(R.id.main_layout);
         final LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(getContext().LAYOUT_INFLATER_SERVICE);
 
-        Transfer tr = new Transfer();
-
         String data = "";
 
         try {
-            data = tr.getFileList();
+            data = Transfer.getFileList();
         } catch (IOException e) {
             final String ExceptionName = e.getClass().getSimpleName();
             final String ExceptionMess = e.getMessage();
 
             if(ExceptionName != null && ExceptionMess != null) {
-                Transfer.error(ExceptionName + ": " + ExceptionMess, title, main_layout);
+                Transfer.error(ExceptionMess);
+                Transfer.activity.runOnUiThread(() -> {
+                    if(main_layout != null)
+                        main_layout.removeAllViews();
+                    if(title != null) {
+                        main_layout.addView(title);
+                        title.setText(ExceptionMess);
+                    }
+                });
             }
 
         }
@@ -253,7 +257,7 @@ public class DownloadFragment extends Fragment {
                             Bshare.setVisibility(LinearLayout.GONE);
                         }
 
-                        if (Progress.setButton(name, dl)) {
+                        if (Transfer.setButton(name, dl)) {
                             dl.setEnabled(false);
                             final Drawable spinner = Transfer.activity.getDrawable(R.drawable.ic_spinner_rotate);
                             int h = spinner.getIntrinsicHeight();
@@ -304,21 +308,14 @@ public class DownloadFragment extends Fragment {
         new File(save_location).mkdirs();
         File file = new File(save_location, name);
 
-        Transfer tr = new Transfer();
+        Transfer tr = new Transfer(Transfer.TYPE_DOWNLOAD);
-
+        tr.file = file;
-        new Thread(() -> {
+        tr.fileName = name;
-            try {
+        tr.fileSize = fileSize;
-                tr.downloadFile(file, name, fileSize, href, button);
+        tr.fileSizeHuman = Transfer.humanReadableByteCountBin(fileSize);
-            } catch (IOException e) {
+        tr.href = href;
-                final String ExceptionName = e.getClass().getSimpleName();
+        tr.button = button;
-                final String ExceptionMess = e.getMessage();
+        tr.AddTransfer();
-
-                if(ExceptionName != null && ExceptionMess != null) {
-                    Transfer.error(ExceptionName + ": " + ExceptionMess, null, null);
-                }
-
-            }
-        }).start();
     };
 
     private View.OnClickListener ListenerShare = v -> {

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

@@ -54,10 +54,10 @@ public class ProgressFragment extends Fragment {
 
         Progress.fragment_on = true;
 
-        List instances = Progress.getInstances();
+        List instances = Transfer.getInstances();
         for (Object obj: instances) {
-            Progress p = (Progress) obj;
+            Transfer tr = (Transfer) obj;
-            p.showProgressFragment();
+            Progress.showProgressFragment(tr);
         }
     }