Android: не удается установить текст для TextView на runOnUiThread

Question

В моем приложении для музыкального плеера у меня есть способ настройки для TextView и SeekBar. В Runnable я проверяю onCompletion в экземпляре службы. Так что, когда песня будет завершена, TextView и SeekBar могут быть сброшены. В первое время я открываю мероприятие. Но, когда я уничтожил это действие, я отсоединяю экземпляр службы, поэтому, когда я начал новую активность, она подключилась к предыдущей Службе, метод ниже вызван снова. В этом случае TextView и SeekBar не могут быть сброшены. A проверил его, сделав два тоста. Он показывает название новой песни, как я хочу. Но он не устанавливается в TextView и SeekBar.

Это моя активность

public class SongsPlayerActivity extends AppCompatActivity { 
private ImageView 
     iv_background; 
private ImageView 
     iv_start_and_pause, iv_next, iv_previous, iv_hate, iv_love; 
private TextView 
     tv_song_title; 
private SeekBar sb_song_duration; 

private Bundle bundle; 
private String al_id, 
     al_path, 
     ar_path; 
private Bitmap bitmap; 
private ArrayList<Song> songs; 
private Runnable getSongsInAlbum = new Runnable() { 
    @Override 
    public void run() { 
     new AlbumImageLoader().execute(Variables.IP_ADDRESS + 
       "/RESOURCES" + 
       "/ALBUMS" + 
       "/" + ar_path + 
       "/" + al_path + 
       "/image.png"); 

     try { 
      new SongsLoader().execute(Variables.IP_ADDRESS + 
        "/Project_1_Web_Service" + 
        "/rest" + 
        "/Song" + 
        "/getSongsInAlbum" + 
        "/" + al_id).get(); 
     } catch (InterruptedException e) { 
      e.printStackTrace(); 
     } catch (ExecutionException e) { 
      e.printStackTrace(); 
     } 
    } 
}; 
private MusicService musicService; 
private Intent intent; 
private boolean musicBound = false; 
public ServiceConnection musicConnection = new ServiceConnection() { 
    @Override 
    public void onServiceConnected(ComponentName componentName, IBinder iBinder) { 
     MusicService.MusicBinder musicBinder = (MusicService.MusicBinder) iBinder; 
     musicService = musicBinder.getService(); 
     musicService.setAndPlay(ar_path, al_path, songs); 

     setAndUpdateUI(); 

     musicBound = true; 
     if(musicService.getSongPaused()){ 
      iv_start_and_pause.setImageResource(R.drawable.start); 
     } 
     else { 
      iv_start_and_pause.setImageResource(R.drawable.pause); 
     } 
    } 

    @Override 
    public void onServiceDisconnected(ComponentName componentName) { 
     musicBound = false; 
    } 
}; 

private Handler handler = new Handler(); 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_songs_player); 

    iv_background = (ImageView) findViewById(R.id.iv_background); 
    iv_next = (ImageView) findViewById(R.id.iv_next); 
    iv_previous = (ImageView) findViewById(R.id.iv_previous); 
    iv_start_and_pause = (ImageView) findViewById(R.id.iv_start_and_pause); 
    iv_hate = (ImageView) findViewById(R.id.iv_hate); 
    iv_love = (ImageView) findViewById(R.id.iv_love); 
    tv_song_title = (TextView) findViewById(R.id.tv_song_title); 
    sb_song_duration = (SeekBar) findViewById(R.id.sb_song_duration); 

    getAlbumInfo(); 

    loadSongsInAlbum(); 

    iv_next.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      playNextSong(); 
     } 
    }); 

    iv_previous.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      playPreviousSong(); 
     } 
    }); 

    iv_start_and_pause.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      startAndPauseSong(); 
     } 
    }); 

    sb_song_duration.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { 

     @Override 
     public void onStopTrackingTouch(SeekBar seekBar) { 

     } 

     @Override 
     public void onStartTrackingTouch(SeekBar seekBar) { 

     } 

     @Override 
     public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
      if(fromUser){ 
       musicService.seekTo(progress * 1000); 
      } 
     } 
    }); 
} 

@Override 
protected void onStart() { 
    super.onStart(); 
    if(intent == null){ 
     intent = new Intent(this, MusicService.class); 
     startService(intent); 
     bindService(intent, 
       musicConnection, 
       Context.BIND_AUTO_CREATE); 
    } 
} 

@Override 
protected void onDestroy(){ 
    unbindService(musicConnection); 
    super.onDestroy(); 
} 

public class AlbumImageLoader extends AsyncTask<String, Integer, String> { 
    @Override 
    protected String doInBackground(String... strings) { 
     try { 
      URL u = new URL(strings[0]); 
      bitmap = BitmapFactory.decodeStream(u.openConnection().getInputStream()); 
      //bitmap = ImageHelper.blurBitmap(getBaseContext(), bitmap, 2f); 
     } catch (MalformedURLException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     return null; 
    } 

    @Override 
    protected void onPostExecute(String s) { 
     iv_background.setImageBitmap(bitmap); 
    } 
} 

public class SongsLoader extends AsyncTask<String, Integer, String>{ 

    @Override 
    protected String doInBackground(String... strings) { 
     FileReader fileReader = new FileReader(); 
     String s = fileReader.readFile(strings[0]); 
     return s; 
    } 

    @Override 
    protected void onPostExecute(String s) { 
     super.onPostExecute(s); 
     try { 
      JSONArray albumJSONArray = new JSONArray(s); 
      for(int i = 0; i < albumJSONArray.length(); i++){ 
       JSONObject jsonObject = albumJSONArray.getJSONObject(i); 
       songs.add(new Song(
         jsonObject.getString("s_title"), 
         jsonObject.getString("ar_path"), 
         jsonObject.getString("al_path"), 
         jsonObject.getString("s_path") 
       )); 
      } 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 
    } 
} 

private void getAlbumInfo(){ 
    bundle = getIntent().getExtras(); 
    al_id = bundle.getString("al_id"); 
    al_path = bundle.getString("al_path"); 
    ar_path = bundle.getString("ar_path"); 
} 

private void loadSongsInAlbum(){ 
    songs = new ArrayList<>(); 
    runOnUiThread(getSongsInAlbum); 
} 

private void playNextSong(){ 
    musicService.playNextSong(); 
    iv_start_and_pause.setImageResource(R.drawable.pause); 

    setAndUpdateUI(); 
} 

private void playPreviousSong(){ 
    musicService.playPreviousSong(); 
    iv_start_and_pause.setImageResource(R.drawable.pause); 

    setAndUpdateUI(); 
} 

private void startAndPauseSong(){ 
    if(musicService.getSongPaused()){ 
     musicService.startSong(); 
     musicService.setSongPaused(false); 
     iv_start_and_pause.setImageResource(R.drawable.pause); 
    } 
    else { 
     musicService.pauseSong(); 
     musicService.setSongPaused(true); 
     iv_start_and_pause.setImageResource(R.drawable.start); 
    } 
} 

private void setAndUpdateUI(){ 
    sb_song_duration.setMax(musicService.getSongDuration()/1000); 
    tv_song_title.setText(musicService.getSongTitle()); 
    runOnUiThread(new Runnable() { 
     @Override 
     public void run() { 
      sb_song_duration.setProgress(musicService.getCurrentPosition()/1000); 
      if(musicService.getSongCompleted()){ 
       sb_song_duration.setMax(musicService.getSongDuration()/1000); 
       tv_song_title.setText(musicService.getSongTitle()); 
       musicService.setSongCompleted(false); 
      } 
      handler.postDelayed(this, 1000); 
     } 
    }); 
} 

Answer 1

Попробуйте использовать этот подход

private Runnable updateUI = new Runnable() { 
      @Override 
      public void run() { 

       sb_song_duration.setMax(musicService.getSongDuration()/1000); 
       tv_song_title.setText(musicService.getSongTitle()); 
       sb_song_duration.setProgress(musicService.getCurrentPosition()/1000); 

       if(musicService.getSongCompleted()){ 
        musicService.setSongCompleted(false); 
       } 
       handler.postDelayed(this, 1000); 
      } 
     }; 


private void setAndUpdateUI(){ 
    runOnUiThread(updateUI); 
}