android 开发视频播放器的时候报这样的错是怎么回事啊？在线等

[tigergogo2010]

这是源码

public class MainActivity extends Activity  implements OnClickListener{
    /** Called when the activity is first created. */
	private MediaPlayer mediaPlayer=new MediaPlayer();
	private SurfaceView sfView;
	private LinearLayout llBar;
	
	//是否在播放
	private boolean requirePlay=false;
	//当前播放位置
	private int currPos;
    @Override
    public void onCreate(Bundle savedInstanceState) {
    	
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        findViewById(R.id.btnPlay).setOnClickListener(this);
        findViewById(R.id.btnStop).setOnClickListener(this);
        sfView=(SurfaceView)findViewById(R.id.svView);
        llBar=(LinearLayout)findViewById(R.id.ll_Bar);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        sfView.getHolder().setFixedSize(100, 144);
        sfView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        sfView.getHolder().addCallback(new Callback(){
        	//销毁
        	public void surfaceDestroyed(SurfaceHolder holder){
        		
        	}
        	//创建
        	public void surfaceCreated(SurfaceHolder holder){
        		if(requirePlay){
        			play();
        			//定位到指定时间段
        			mediaPlayer.seekTo(currPos);
        		}
        	}
        	//改变
        	public void surfaceChanged(SurfaceHolder holder,int format,int width,int height){
        		
        	}
        });
    }
    public void onClick(View v){
    	int id=v.getId();
    	//开始播放
    	if(id==R.id.btnPlay){
    		play();
    	}
    	//停止播放
    	else if(id==R.id.btnStop){
    		mediaPlayer.stop();
    		requirePlay=false;
    	}
    }
    /**
     播放
     */
    private void play(){
    	try{
    		requirePlay=true;
    		//重置为初始状态
    		mediaPlayer.reset();
    		//设置音频为流类型
    		mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    		//设置页面输出
    		mediaPlayer.setDisplay(sfView.getHolder());
    		//设置文件路径
    		String path="http://flv.aedu.co/index.aspx?file=004";
    		if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())){
    			path=Environment.getExternalStorageDirectory()+"/youku.3gp";
    		}else{
    			Toast.makeText(this, "文件挂载问题", Toast.LENGTH_LONG).show();
    			return;
    		}
    		mediaPlayer.setDataSource(path);
    		mediaPlayer.prepare();
    		mediaPlayer.start();
    		llBar.setVisibility(View.GONE);
    	}catch(Exception e){
    		e.printStackTrace();
    	}
    }
    /**
     暂停
     */
    protected void onPause(){
    	super.onPause();
    	if(mediaPlayer.isPlaying()){
    		currPos=mediaPlayer.getCurrentPosition();
    		mediaPlayer.stop();
    		requirePlay=true;
    	}
    }
    /**
     销毁
     */
    protected void onDestroy(){
    	super.onDestroy();
    	mediaPlayer.release();
    }
    public boolean onKeyDown(int keyCode,KeyEvent event){
    	if(keyCode==KeyEvent.KEYCODE_SEARCH){
    		llBar.setVisibility(View.VISIBLE);
    	}
    	return true;
    }
}

这是报的错误
11-06 06:59:38.821: E/MediaPlayer(765): error (1, -2147483648)
11-06 06:59:38.832: W/System.err(765): java.io.IOException: Prepare failed.: status=0x1
11-06 06:59:38.832: W/System.err(765): at android.media.MediaPlayer.prepare(Native Method)
11-06 06:59:38.841: W/System.err(765): at My.Videos.MainActivity.play(MainActivity.java:94)
11-06 06:59:38.841: W/System.err(765): at My.Videos.MainActivity.onClick(MainActivity.java:63)
11-06 06:59:38.841: W/System.err(765): at android.view.View.performClick(View.java:2408)
11-06 06:59:38.841: W/System.err(765): at android.view.View$PerformClick.run(View.java:8816)
11-06 06:59:38.841: W/System.err(765): at android.os.Handler.handleCallback(Handler.java:587)
11-06 06:59:38.851: W/System.err(765): at android.os.Handler.dispatchMessage(Handler.java:92)
11-06 06:59:38.851: W/System.err(765): at android.os.Looper.loop(Looper.java:123)
11-06 06:59:38.851: W/System.err(765): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-06 06:59:38.851: W/System.err(765): at java.lang.reflect.Method.invokeNative(Native Method)
11-06 06:59:38.851: W/System.err(765): at java.lang.reflect.Method.invoke(Method.java:521)
11-06 06:59:38.851: W/System.err(765): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-06 06:59:38.861: W/System.err(765): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-06 06:59:38.861: W/System.err(765): at dalvik.system.NativeStart.main(Native Method)

[tigergogo2010]

自己顶一个,,,,,,,,,,,,