seekbar不滾動在媒體播放器

Question

我已經創建了一個簡單的Android媒體播放器，它工作正常只是seekbar不移動。當我手動移動seekbar時，它工作正常，並將其播放前進和後退。但它不會自動移動。以下是代碼;

public class Datadetail extends AppCompatActivity implements Runnable, OnSeekBarChangeListener{ 

TextView txtname; 
TextView txtaarti; 
String[] itemname; 
int position; 
int resID; 
private SeekBar seekbar; 
ImageButton buttonPlay; 
private MediaPlayer mplayer; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    this.setContentView(R.layout.data_detail); 

    Intent i = getIntent(); 

    position = i.getExtras().getInt("position"); 
    itemname = i.getStringArrayExtra("itemname"); 

    txtname = (TextView) findViewById(R.id.textView2); 
    txtname.setText(itemname[position]); 

    txtaarti = (TextView) findViewById(R.id.textView3); 
    txtaarti.setText(Aarti.aartitxt[position]); 

    seekbar = (SeekBar) findViewById(R.id.seekBar); 
    seekbar.setOnSeekBarChangeListener(this); 
    seekbar.setEnabled(false); 

    buttonPlay = (ImageButton) findViewById(R.id.imageButton); 

    playsong(position); 


    buttonPlay.setOnClickListener(new View.OnClickListener(){ 
     @Override 
     public void onClick(View view) { 
      if (mplayer.isPlaying()){ 
       if (mplayer != null){ 
        mplayer.pause(); 
        buttonPlay.setImageResource(R.mipmap.ic_play); 
       } 
      }else{ 
       if (mplayer != null){ 
        mplayer.start(); 
        seekbar.setMax(mplayer.getDuration()); 
        new Thread(String.valueOf(this)).start(); 
        buttonPlay.setImageResource(R.mipmap.ic_pause); 

       } 
      } 
      if (mplayer == null) { 
       if (mplayer.isPlaying() || mplayer.getDuration() > 0) { 
        mplayer.stop(); 
        mplayer = null; 
        seekbar.setProgress(0); 
       } 
      } 

     } 
    }); 
} 

public void playsong(int position) { 
      switch (position){ 
       case 0: 
        resID = R.raw.ganesh_aarti; 
        break; 
       case 1: 
        resID = R.raw.durga_aarti; 
        break; 

      } 
    if (mplayer !=null){ 
     mplayer.release(); 
    } 

    mplayer = MediaPlayer.create(this, resID); 
    seekbar.setEnabled(true); 
    buttonPlay.setImageResource(R.mipmap.ic_play); 

} 

@Override 
public void onBackPressed() { 
    if (mplayer.isPlaying()) { 
     mplayer.stop(); 
    } 
    mplayer.release(); 
    super.onBackPressed(); 
} 
public void run() { 
    int currentPosition = mplayer.getCurrentPosition(); 
    int total = mplayer.getDuration(); 

    while (mplayer != null && currentPosition < total) { 
     try { 
      Thread.sleep(1000); 
      currentPosition = mplayer.getCurrentPosition(); 
     } catch (InterruptedException e) { 
      return; 
     } catch (Exception e) { 
      return; 
     } 
     seekbar.setProgress(currentPosition); 
    } 
} 
public void onProgressChanged(SeekBar seekbar, int progress, boolean fromUser) { 
    try { 
     if (mplayer.isPlaying() || mplayer != null) { 
      if (fromUser) 
       mplayer.seekTo(progress); 
     } else if (mplayer != null) { 
      Toast.makeText(getApplicationContext(), "Media is not running", 
        Toast.LENGTH_SHORT).show(); 
      seekbar.setProgress(0); 
     } 
    } catch (Exception e) { 
     Log.e("seek bar", "" + e); 
     seekbar.setEnabled(false); 

    } 
} 

@Override 
public void onStartTrackingTouch(SeekBar seekbar) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onStopTrackingTouch(SeekBar seekbar) { 
    // TODO Auto-generated method stub 

} 

}

Answer 1

下面是答案，而且現在工作正常;

import android.content.Intent; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.ImageButton; 
import android.widget.SeekBar; 
import android.widget.SeekBar.OnSeekBarChangeListener; 
import android.widget.TextView; 
import android.os.Handler; 

public class Datadetail1 extends AppCompatActivity implements OnSeekBarChangeListener{ 

TextView txtname; 
TextView txtaarti; 
String[] itemname; 
int position; 
int resID; 
private SeekBar seekbar; 
ImageButton buttonPlay; 
private MediaPlayer mplayer; 
private Handler mHandler = new Handler(); 
private Utilities utils; 
private TextView songCurrentDurationLabel; 
private TextView songTotalDurationLabel; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    this.setContentView(R.layout.data_detail); 

    Intent i = getIntent(); 

    position = i.getExtras().getInt("position"); 
    itemname = i.getStringArrayExtra("itemname"); 

    txtname = (TextView) findViewById(R.id.textView2); 
    txtname.setText(itemname[position]); 

    txtaarti = (TextView) findViewById(R.id.textView3); 
    txtaarti.setText(Aarti.aartitxt[position]); 

    seekbar = (SeekBar) findViewById(R.id.seekBar); 
    seekbar.setOnSeekBarChangeListener(this); 
    seekbar.setEnabled(true); 

    songCurrentDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel); 
    songTotalDurationLabel = (TextView) findViewById(R.id.songTotalDurationLabel); 
    utils = new Utilities(); 
    mplayer = new MediaPlayer(); 

    buttonPlay = (ImageButton) findViewById(R.id.imageButton); 

    playsong(position); 

    buttonPlay.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      if (mplayer.isPlaying()) { 
       if (mplayer != null) { 
        mplayer.pause(); 
        buttonPlay.setImageResource(R.mipmap.ic_play); 
       } 
      } else { 
       if (mplayer != null) { 
        mplayer.start(); 
        buttonPlay.setImageResource(R.mipmap.ic_pause); 

       } 
      } 

     } 
    }); 
} 

public void playsong(int position) { 
    switch (position){ 
     case 0: 
      resID = R.raw.ganesh_aarti; 
      break; 
     case 1: 
      resID = R.raw.durga_aarti; 
      break; 

    } 
    if (mplayer !=null){ 
     mplayer.release(); 
    } 
     mplayer = MediaPlayer.create(this, resID); 
     buttonPlay.setImageResource(R.mipmap.ic_play); 
     seekbar.setProgress(0); 
     seekbar.setMax(100); 
     updateProgressBar(); 

} 
public void updateProgressBar() { 
    mHandler.postDelayed(mUpdateTimeTask, 100); 
} 
private Runnable mUpdateTimeTask = new Runnable() { 
    public void run() { 
     int totalDuration = mplayer.getDuration(); 
     int currentDuration = mplayer.getCurrentPosition(); 

     // Displaying Total Duration time 
     songTotalDurationLabel.setText(""+utils.milliSecondsToTimer(totalDuration)); 
     // Displaying time completed playing 
     songCurrentDurationLabel.setText(""+utils.milliSecondsToTimer(currentDuration)); 

     // Updating progress bar 
     int progress = (int)(utils.getProgressPercentage(currentDuration, totalDuration)); 
     //Log.d("Progress", ""+progress); 
     seekbar.setProgress(progress); 

     // Running this thread after 100 milliseconds 
     mHandler.postDelayed(this, 100); 
    } 
}; 


@Override 
public void onBackPressed() { 
    if (mplayer.isPlaying()) { 
     mplayer.stop(); 
    } 
    mHandler.removeCallbacks(mUpdateTimeTask); 
    mplayer.release(); 
    super.onBackPressed(); 
} 

public void onProgressChanged(SeekBar seekbar, int progress, boolean fromUser) { 

} 

@Override 
public void onStartTrackingTouch(SeekBar seekbar) { 
    // TODO Auto-generated method stub 
    mHandler.removeCallbacks(mUpdateTimeTask); 

} 

@Override 
public void onStopTrackingTouch(SeekBar seekbar) { 
    // TODO Auto-generated method stub 
    mHandler.removeCallbacks(mUpdateTimeTask); 
    int totalDuration = mplayer.getDuration(); 
    int currentPosition = utils.progressToTimer(seekbar.getProgress(), totalDuration); 

    // forward or backward to certain seconds 
    mplayer.seekTo(currentPosition); 

    // update timer progress again 
    updateProgressBar(); 

} 

}