public class MediaPlayer_Activity extends Activity {  
    private Button button1;  
    private Button button2;  
    private Button button3;  
    private TextView textView;  
    private TextView textView2;  
    private SeekBar seekBar;  
    private MediaPlayer mePlayer;  
    public boolean isPause=false;  
      
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_media_player_);  
        button1=(Button)findViewById(R.id.button_start);  
        button2=(Button)findViewById(R.id.button_pause);  
        button3=(Button)findViewById(R.id.button_end);  
        textView=(TextView)findViewById(R.id.textview_display);  
        textView2=(TextView)findViewById(R.id.textview_volume);  
        seekBar=(SeekBar)findViewById(R.id.seekbar);  
        button1.setOnClickListener(new MyButton());  
        button2.setOnClickListener(new MyButton());  
        button3.setOnClickListener(new MyButton());  
        button2.setEnabled(false);  
        button3.setEnabled(false);  
          
        //获取音频管理类的对象  
        final AudioManager audioManager=(AudioManager)MediaPlayer_Activity.this.  
                getSystemService(Context.AUDIO_SERVICE);  
        //设置当前调整音量只是针对媒体音乐  
        MediaPlayer_Activity.this.setVolumeControlStream(AudioManager.STREAM_MUSIC);  
        //设置拖动条的最大值---是系统的最大值  
        seekBar.setMax(audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC));  
        //获取当前的音量  
        int progress=audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);  
        seekBar.setProgress(progress);  
        textView2.setText("当前音量："+progress);  
        //为拖动条添加监听器  
        seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {  
              
            @Override  
            public void onStopTrackingTouch(SeekBar arg0) {  
                // TODO Auto-generated method stub  
                  
            }  
              
            @Override  
            public void onStartTrackingTouch(SeekBar arg0) {  
                // TODO Auto-generated method stub  
                  
            }  
              
            @Override  
            public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {  
                // TODO Auto-generated method stub  
                textView2.setText("当前音量："+arg1);  
                audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, arg1,  
                        AudioManager.FLAG_PLAY_SOUND);  
            }  
        });  
        mePlayer=MediaPlayer.create(MediaPlayer_Activity.this, R.raw.caiyunzhinan);  
        mePlayer.setOnCompletionListener(new OnCompletionListener() {  
              
            @Override  
            public void onCompletion(MediaPlayer mp) {  
                // TODO Auto-generated method stub  
                Start();  
            }  
        });  
    }  
    class MyButton implements OnClickListener{  
  
        @Override  
        public void onClick(View v) {  
            // TODO Auto-generated method stub  
            switch (v.getId()) {  
            case R.id.button_start:  
                Start();  
                break;  
            case R.id.button_pause:  
                Pause();  
                break;  
            case R.id.button_end:  
                End();  
                break;  
  
            default:  
                break;  
            }  
        }  
  
    }  
    public void Start() {  
        mePlayer.start();  
        button1.setEnabled(false);  
        button2.setEnabled(true);  
        button3.setEnabled(true);  
        textView.setText("开始播放音乐。。。");  
        if(isPause){  
            button2.setText("Continue");  
            isPause=false;  
        }  
    }  
    public void Pause() {  
        if (mePlayer.isPlaying()&&!isPause) {  
            mePlayer.pause();  
            isPause=true;  
            button2.setText("Continue");  
            textView.setText("暂停播放音乐。。。");  
            button1.setEnabled(true);  
        }  
        else {  
            mePlayer.start();  
            button2.setText("Pause");  
            textView.setText("播放音乐中。。。");  
            isPause=false;  
            button1.setEnabled(false);  
        }  
    }  
    public void End() {  
        mePlayer.stop();  
        button1.setEnabled(true);  
        button2.setEnabled(false);  
        button3.setEnabled(false);  
        textView.setText("音乐停止播放。。。");  
    }  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_media_player_, menu);  
        return true;  
    }  
  
}  

//java/6591