在Android中關閉音頻問題

Question

我是Android編程的新手，我一直在開發媒體應用程序，它可以播放，暫停音頻並使用Seekbar來操作音量和媒體當前位置。當我運行該應用程序時，我有在將Seekbar進度值添加到MediaPlayer後關閉音頻。

import android.content.Context; 
import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.MediaController; 
import android.widget.SeekBar; 

import java.util.Timer; 
import java.util.TimerTask; 

public class MainActivity extends AppCompatActivity { 

MediaPlayer mediaPlayer; 
AudioManager audioManager; 
boolean isPlaying; 
public void songPlay(View view) 
{ 
    if(isPlaying) { 
     mediaPlayer.start(); 
     isPlaying = false; 

    } 
} 
public void songPause(View view) 
{ 
    mediaPlayer.pause(); 
    isPlaying = true; 
} 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    mediaPlayer = MediaPlayer.create(this,R.raw.nfy); 
    isPlaying = true; 
    audioManager= (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
    int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
    int currentVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC); 

    SeekBar seekBar = (SeekBar) findViewById(R.id.volumeBar); 
    seekBar.setMax(maxVolume); 
    seekBar.setProgress(currentVolume); 
    seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { 
     @Override 
     public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
      audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, progress, 0); 
     } 

     @Override 
     public void onStartTrackingTouch(SeekBar seekBar) { 

     } 

     @Override 
     public void onStopTrackingTouch(SeekBar seekBar) { 

     } 
    }); 


    final SeekBar scrubber = (SeekBar) findViewById(R.id.playBar); 
    scrubber.setMax(mediaPlayer.getDuration()); 
    new Timer().scheduleAtFixedRate(new TimerTask() { 
     @Override 
     public void run() { 
      scrubber.setProgress(mediaPlayer.getCurrentPosition()); 
     } 
    },0,1000); 

    scrubber.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { 
     @Override 
     public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
      if(mediaPlayer!=null && fromUser) 
      mediaPlayer.seekTo(progress); 
     } 

     @Override 
     public void onStartTrackingTouch(SeekBar seekBar) { 

     } 

     @Override 
     public void onStopTrackingTouch(SeekBar seekBar) { 

     } 
    }); 
} 

Answer 1

幾乎在那裏，請嘗試用以下內容替換onProgressChanged。

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