Как закрыть активность и снова показать ту же активность снова, нажав на уведомление

Question

Я загружаю видео с помощью FTP. Я также показываю уведомление об этом. Если я нажму на уведомление, это приведет меня к экрану приложения. Таким образом, один и тот же экран будет работать два раза. Поэтому мне нужно дважды нажать кнопку «Назад». Я хочу избежать этого. Пожалуйста, помогите мне ...

public class loadVideo extends AsyncTask<Void, Void, Void> { 
     String status = null; 
     FTPClient ftp = new FTPClient(); 
     InputStream in = null; 
     int progress = 2; 
     String dbftpserver, dbftpusername, dbftpPassword, dbftpPort, 
       dbftpDirPath = null; 
     String hostName, username, password = null; 
     NotificationManager notificationManager = (NotificationManager) getApplicationContext() 
       .getSystemService(Context.NOTIFICATION_SERVICE); 

     int id = 10; 

     @Override 
     protected Void doInBackground(Void... arg0) { 
      UUID uniqueKey = UUID.randomUUID(); 
      fname = uniqueKey.toString(); 
      Log.e("UNIQUE NAME", fname); 
      String strquery1 = "SELECT FTP_Server,FTP_Username,FTP_Password,FTP_PORT,FTP_Directory_Path FROM hwd_settings WHERE ID = 1 "; 
      Cursor mCursor = (MainscreenActivity.JEEMAHWDroidDB).rawQuery(
        strquery1, null); 
      if (mCursor.getCount() != 0) { 
       mCursor.moveToLast(); 
       for (int i = mCursor.getCount() - 1; i >= 0; i--) { 
        dbftpserver = mCursor.getString(0); 
        dbftpusername = mCursor.getString(1); 
        dbftpPassword = mCursor.getString(2); 
        dbftpPort = mCursor.getString(3); 
        dbftpDirPath = mCursor.getString(4); 
       } 
      } 
      hostName = dbftpserver; 
      username = dbftpusername; 
      password = dbftpPassword; 
      try { 
       ftp.connect(hostName); 
       ftp.login(username, password); 
       ftp.setFileType(FTP.BINARY_FILE_TYPE); 
       ftp.enterLocalPassiveMode(); 
       ftp.changeWorkingDirectory(dbftpDirPath + "uploads"); 
       int reply = ftp.getReplyCode(); 
       System.out.println("Received Reply from FTP Connection:" 
         + reply); 
       if (FTPReply.isPositiveCompletion(reply)) { 
        System.out.println("Connected Success");      
        doftpVideo(); 
       } else { 
        Log.e("FTP", "CONNECTION ERROR"); 
        finish(); 
        Toast.makeText(getApplicationContext(), 
          "Unable to connect FTP", Toast.LENGTH_LONG).show(); 
       } 
       return null; 
      } catch (Exception i) { 
       i.printStackTrace(); 
       String temp = i.toString(); 
       if (temp.equalsIgnoreCase("java.net.UnknownHostException: " 
         + hostName)) { 
        showAlert(); 
       } 

      } 
      return null; 
     } 

     private void showAlert() { 
      AlertDialog.Builder alert = new AlertDialog.Builder(
        NewVideoActivity.this); 
      alert.setMessage("Unable to connect FTP"); 
      alert.setPositiveButton(getResources().getString(R.string.ok), 
        new DialogInterface.OnClickListener() { 
         public void onClick(DialogInterface dialog, 
           int whichButton) { 
          dialog.cancel(); 
         } 
        }).show(); 
     } 

     public void doftpVideo() { 
      Intent intent1 = new Intent(NewVideoActivity.this, 
        MainscreenActivity.class); 
      final PendingIntent pendingIntent = PendingIntent.getActivity(
        getApplicationContext(), 0, intent1, 0); 
      Notification notification = new Notification(); 
      final String location = selectedPath; 
      final SharedPreferences prefs = PreferenceManager 
        .getDefaultSharedPreferences(getApplicationContext()); 
      SharedPreferences.Editor prefsEditor = prefs.edit(); 
      try { 
       int icon = R.drawable.video_upload; // icon from resources 
       CharSequence tickerText = "Starting Video Upload"; // ticker-text 
       long when = System.currentTimeMillis(); // notification time 
       Context context = getApplicationContext(); // application 
                  // Context 
       CharSequence contentTitle = "JEEMAHWDroid"; // expanded message 
                  // title 
       CharSequence contentText = "Uploading " + strTitle; // expanded 
                    // message 
                    // text 
       notification = new Notification(icon, tickerText, when); 
       notification.flags = notification.flags 
         | Notification.FLAG_ONLY_ALERT_ONCE 
         | Notification.FLAG_NO_CLEAR; 
       notification.setLatestEventInfo(context, contentTitle, 
         contentText, pendingIntent); 
       notificationManager.notify(id, notification); 
       File f1 = new File(location); 
       in = new FileInputStream(f1); 
       ftp.storeFile(fname + "." + extension, in); 
       System.out.println("SUCCESS"); 
       System.out.println("Video Title:" + strTitle 
         + " is uploaded successfully"); 
       System.out.println("Video Name:" + fname 
         + " is uploaded successfully"); 
       status = "completed"; 
       prefsEditor.putString("status", status); 
       prefsEditor.commit(); 
       String tempStatus = prefs.getString("status", null); 
       System.out.println("tempSTATUS-->>>" + tempStatus); 
       strUserName = prefs.getString(
         getResources().getString(R.string.username), null); 
       strToken = prefs.getString(
         getResources().getString(R.string.token), null); 
       url = prefs.getString("VALUE", null); 
       doftpImage(); 
       doCreateRecord(); 
      } catch (Exception i) { 
       i.printStackTrace(); 
      } 
      return; 
     } 

Answer 1

установка android:launchMode="singleInstance" для MainscreenActivity в вашем AndroidManifest.xml

Answer 2

Try Установите FLAG_ACTIVITY_SINGLE_TOP флаг intent1.