android中Mediaplay的使用

最新推荐文章于 2025-07-09 15:14:27 发布

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最新推荐文章于 2025-07-09 15:14:27 发布

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分类专栏： Android 多媒体文章标签： Android android开发 app

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本文介绍了一个简单的Android音乐播放器应用实现，该应用能够播放存储在SD卡上的MP3文件，并提供了开始、暂停和停止等基本操作。通过实例代码展示了如何使用MediaPlayer组件进行音乐播放的控制。

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<span style="font-size:18px;">    package hope.cs.zhku;  
      
    import java.io.IOException;  
      
    import android.app.Activity;  
    import android.media.MediaPlayer;  
    import android.media.MediaPlayer.OnCompletionListener;  
    import android.os.Bundle;  
    import android.view.View;  
    import android.view.View.OnClickListener;  
    import android.widget.Button;  
      
    public class MainActivity extends Activity {  
        boolean isPlaying=false;  
        MediaPlayer mediaPlayer;  
        Button start;  
        Button pause;  
        Button stop;  
        /** Called when the activity is first created. */  
        @Override  
        public void onCreate(Bundle savedInstanceState) {  
              
              
            super.onCreate(savedInstanceState);  
            setContentView(R.layout.main);  
              
            start=(Button)findViewById(R.id.start);  
            pause=(Button)findViewById(R.id.parse);  
            stop=(Button)findViewById(R.id.stop);  
              
            mediaPlayer=new MediaPlayer();  
            try {  
                mediaPlayer.setDataSource("/sdcard/03. Lovin'you.mp3");  
                mediaPlayer.prepare();  
                mediaPlayer.start();  
                isPlaying=true;  
                mediaPlayer.setOnCompletionListener(new OnCompletionListener() {  
                      
                    @Override  
                    public void onCompletion(MediaPlayer mp) {  
                        // TODO Auto-generated method stub  
                        mp.release();  
                    }  
                });  
                  
            } catch (IllegalArgumentException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            } catch (IllegalStateException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            } catch (IOException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            } catch(Exception e){  
                e.printStackTrace();  
            }  
              
              
              
            start.setOnClickListener(new OnClickListener() {  
                  
                @Override  
                public void onClick(View v) {  
                    // TODO Auto-generated method stub  
                      
                    if(mediaPlayer.getCurrentPosition()>0){  
                        mediaPlayer.start();  
                    }  
                      
                    else if(!mediaPlayer.isPlaying()){  
                        try {  
                            mediaPlayer.setDataSource("/sdcard/03. Lovin'you.mp3");  
                            mediaPlayer.prepare();  
                            mediaPlayer.start();  
                            start.setClickable(false);  
                            pause.setClickable(true);  
                            stop.setClickable(true);  
                        } catch (IllegalArgumentException e) {  
                            // TODO Auto-generated catch block  
                            e.printStackTrace();  
                        } catch (IllegalStateException e) {  
                            // TODO Auto-generated catch block  
                            e.printStackTrace();  
                        } catch (IOException e) {  
                            // TODO Auto-generated catch block  
                            e.printStackTrace();  
                        }  
                    }  
                }  
            });  
              
              
            pause.setOnClickListener(new OnClickListener() {  
                  
                @Override  
                public void onClick(View v) {  
                    // TODO Auto-generated method stub  
                    if(mediaPlayer.isPlaying()){  
                        mediaPlayer.pause();  
                        pause.setClickable(false);  
                        start.setClickable(true);  
                    }  
                }  
            });  
              
            stop.setOnClickListener(new OnClickListener() {  
                  
                @Override  
                public void onClick(View v) {  
                    // TODO Auto-generated method stub  
                    if(mediaPlayer.isPlaying()){  
                        mediaPlayer.stop();  
                        mediaPlayer.reset();  
                        start.setClickable(true);  
                        pause.setClickable(true);  
                        stop.setClickable(false);  
                    }  
                }  
            });  
        }  
          
        @Override  
        public void onDestroy(){  
            super.onDestroy();  
            if(mediaPlayer!=null){  
                mediaPlayer.release();  
            }  
        }  
    }  </span>