Как увеличить и уменьшить звук медиаплеера при перемещении пальца вверх и вниз?

Question

Я новичок в разработке Android и в настоящее время я разрабатываю приложение для простого музыкального плеера. Здесь вопрос заключается в том, как увеличить и уменьшить громкость музыкального проигрывателя при раздвижном пальце моей основной деятельности музыкального проигрывателя.

это мой игрок фрагмент музыки

public class Player extends Fragment implements WheelModel.Listener,MediaPlayer.OnCompletionListener,SeekBar.OnSeekBarChangeListener{ 

private ImageButton btnPlay; 
private ImageButton btnForward; 
private ImageButton btnBackward; 
private ImageButton btnNext; 
private ImageButton btnPrevious; 
private ImageButton btnRepeat; 
private ImageButton btnShuffle; 
private SeekBar songProgressBar; 
private TextView songTitleLabel; 
private TextView songCurrentDurationLabel; 
private TextView songTotalDurationLabel; 
// Media Player 
public static MediaPlayer mp,mp2; 
VisualizerView mVisualizerView; 
SliderView sl; 
private Visualizer mVisualizer; 
// Handler to update UI timer, progress bar etc,. 
private Handler mHandler = new Handler();; 
private SongsManager songManager; 
private Utilities utils; 
private int seekForwardTime = 5000; // 5000 milliseconds 
private int seekBackwardTime = 5000; // 5000 milliseconds 
private int currentSongIndex = 0; 
private boolean isShuffle = false; 
private boolean isRepeat = false; 
private ArrayList<SongModel> songsList = new ArrayList<SongModel>(); 
int songIndex; 
AudioManager audioManager; 
SongAdapter songAdapter; 

public Player(int position) { 
    songIndex = position; 
} 

public Player() { 

} 


    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     View android = inflater.inflate(R.layout.player, container, false); 
     ClickWheel wheel = (ClickWheel) android.findViewById(R.id.wheel); 
     wheel.getModel().addListener(this); 
     return android; 

    } 
@Override 
public void onViewCreated(View v, Bundle savedInstanceState) { 
    super.onViewCreated(v, savedInstanceState); 

    btnPlay = (ImageButton)getView().findViewById(R.id.btnPlay); 
    btnForward = (ImageButton) getView().findViewById(R.id.btnForward); 
    btnBackward = (ImageButton) getView().findViewById(R.id.btnBackward); 
    btnNext = (ImageButton) getView().findViewById(R.id.btnNext); 
    btnPrevious = (ImageButton) getView().findViewById(R.id.btnPrevious); 
    btnRepeat = (ImageButton) getView().findViewById(R.id.btnRepeat); 
    btnShuffle = (ImageButton) getView().findViewById(R.id.btnShuffle); 
    songProgressBar = (SeekBar) getView().findViewById(R.id.songProgressBar); 
    songTitleLabel = (TextView) getView().findViewById(R.id.songTitle); 
    songTitleLabel.setSelected(true); 
    songCurrentDurationLabel = (TextView) getView().findViewById(R.id.songCurrentDurationLabel); 
    songTotalDurationLabel = (TextView) getView().findViewById(R.id.songTotalDurationLabel); 


    mp = new MediaPlayer(); 

    songManager = new SongsManager(); 
    utils = new Utilities(); 

    songProgressBar.setOnSeekBarChangeListener(this); 
    mp.setOnCompletionListener(this); 
    songsList = songManager.getPlayList(); 

    if (songIndex == 0) { 
     playSong(0); 
    } else { 
     playSong(songIndex); 
    } 
    btnPlay.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      // check for already playing 
      if (mp.isPlaying()) { 
       if (mp != null) { 
        mp.pause(); 
        btnPlay.setImageResource(R.drawable.btn_play); 
       } 
      } else { 
       // Resume song 
       if (mp != null) { 
        mp.start(); 
        btnPlay.setImageResource(R.drawable.btn_pause); 
       } 
      } 

     } 
    }); 
    btnForward.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      int currentPosition = mp.getCurrentPosition(); 
      if(currentPosition + seekForwardTime <= mp.getDuration()){ 
       mp.seekTo(currentPosition + seekForwardTime); 
      }else{ 
       mp.seekTo(mp.getDuration()); 
      } 
     } 
    }); 
    btnBackward.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      int currentPosition = mp.getCurrentPosition(); 
      if(currentPosition - seekBackwardTime >= 0){ 
       mp.seekTo(currentPosition - seekBackwardTime); 
      }else{ 
       mp.seekTo(0); 
      } 

     } 
    }); 
    btnNext.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      if(currentSongIndex < (songsList.size() - 1)){ 
       playSong(currentSongIndex + 1); 
       currentSongIndex = currentSongIndex + 1; 
      }else{ 
       playSong(0); 
       currentSongIndex = 0; 
      } 

     } 
    }); 
    btnPrevious.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      if(currentSongIndex > 0){ 
       playSong(currentSongIndex - 1); 
       currentSongIndex = currentSongIndex - 1; 
      }else{ 
       playSong(songsList.size() - 1); 
       currentSongIndex = songsList.size() - 1; 
      } 

     } 
    }); 
    btnRepeat.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      if(isRepeat){ 
       isRepeat = false; 
       Toast.makeText(getActivity().getApplicationContext(), "Repeat is OFF", Toast.LENGTH_SHORT).show(); 
       btnRepeat.setImageResource(R.drawable.btn_repeat); 
      }else{ 
       isRepeat = true; 
       Toast.makeText(getActivity().getApplicationContext(), "Repeat is ON", Toast.LENGTH_SHORT).show(); 
       isShuffle = false; 
       btnRepeat.setImageResource(R.drawable.btn_repeat_focused); 
       btnShuffle.setImageResource(R.drawable.btn_shuffle); 
      } 
     } 
    }); 
    btnShuffle.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      if(isShuffle){ 
       isShuffle = false; 
       Toast.makeText(getActivity().getApplicationContext(), "Shuffle is OFF", Toast.LENGTH_SHORT).show(); 
       btnShuffle.setImageResource(R.drawable.btn_shuffle); 
      }else{ 
       isShuffle= true; 
       Toast.makeText(getActivity().getApplicationContext(), "Shuffle is ON", Toast.LENGTH_SHORT).show(); 
       isRepeat = false; 
       btnShuffle.setImageResource(R.drawable.btn_shuffle_focused); 
       btnRepeat.setImageResource(R.drawable.btn_repeat); 
      } 
     } 
    }); 

} 
public void playSong(int songIndex) { 
    try { 
     Log.e("playSong()...", "....is called"); 
     mp.reset(); 
     mp.setDataSource(songsList.get(songIndex).getSongPath()); 
     mp.prepare(); 
     songProgressBar.setProgress(0); 
     songProgressBar.setMax(100); 
     String songTitle = songsList.get(songIndex).getSongTitle(); 
     songTitleLabel.setText(songTitle); 
     btnPlay.setImageResource(R.drawable.btn_pause); 
     mp.start(); 
     updateProgressBar(); 
    } catch (IllegalArgumentException e) { 
     e.printStackTrace(); 
    } catch (IllegalStateException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 
@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    Log.i("song...songIndex...", "..." + songIndex); 
    mHandler.removeCallbacks(mUpdateTimeTask); 
    if(resultCode == 100){ 
     currentSongIndex = data.getExtras().getInt("songIndex"); 
     // play selected song 
     playSong(currentSongIndex); 
    } 

} 
private Runnable mUpdateTimeTask = new Runnable() { 
    public void run() { 
     long totalDuration = mp.getDuration(); 
     long currentDuration = mp.getCurrentPosition(); 

     songTotalDurationLabel.setText(""+utils.milliSecondsToTimer(totalDuration)); 

     songCurrentDurationLabel.setText("" + utils.milliSecondsToTimer(currentDuration)); 

     int progress =(int)(utils.getProgressPercentage(currentDuration, totalDuration)); 

     songProgressBar.setProgress(progress); 

     mHandler.postDelayed(this, 100); 
    } 
}; 
private void updateProgressBar() { 
    mHandler.postDelayed(mUpdateTimeTask, 100); 
} 
@Override 
public void onCompletion(MediaPlayer mp) { 
    if(isRepeat){ 
     playSong(currentSongIndex); 
    } else if(isShuffle){ 
     Random rand = new Random(); 
     currentSongIndex = rand.nextInt((songsList.size() - 1) - 0 + 1) + 0; 
     playSong(currentSongIndex); 
    } else{ 
     if(currentSongIndex < (songsList.size() - 1)){ 
      playSong(currentSongIndex + 1); 
      currentSongIndex = currentSongIndex + 1; 
     }else{ 
      playSong(0); 
      currentSongIndex = 0; 
     } 
    } 
} 
@Override 
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 

} 
public void onStartTrackingTouch(SeekBar seekBar) { 
    mHandler.removeCallbacks(mUpdateTimeTask); 
} 
public void onStopTrackingTouch(SeekBar seekBar) { 
    mHandler.removeCallbacks(mUpdateTimeTask); 
    int totalDuration = mp.getDuration(); 
    int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration); 
    mp.seekTo(currentPosition); 
    updateProgressBar(); 
} 
@Override 
public void onDialPositionChanged(WheelModel sender, int nicksChanged) { 
    getActivity().setVolumeControlStream(AudioManager.STREAM_MUSIC); 
    mp2 =MediaPlayer.create(getActivity(),R.raw.djlazer); 
    mp2.start(); 
}} 

Если кто-нибудь знает логика из них, пожалуйста, помогите мне в этом.

заранее спасибо ...

Answer 1

событие, когда пользователь отпускает его палец MotionEvent.ACTION_UP. Я не знаю, есть ли какие-либо рекомендации, запрещающие использование View.OnTouchListener вместо onClick(), скорее всего, это зависит от ситуации. Вот мой пример рабочий код:

imageButton.setOnTouchListener(new OnTouchListener() { 
    @Override 
    public boolean onTouch(View v, MotionEvent event) { 
     if(event.getAction() == MotionEvent.ACTION_UP){ 

      // Do what you want 
      return true; 
     } 
     return false; 
    } 
});