android MediaPlayer.prepare的问题

[wangtao4226]

07-09 11:32:00.679: E/MediaPlayer(5397): error (12, 0)
07-09 11:32:00.679: E/MediaPlayer(5397): error (6, 0)
07-09 11:32:00.679: W/System.err(5397): java.io.IOException: Prepare failed.: status=0xC
07-09 11:32:00.679: W/System.err(5397): at android.media.MediaPlayer.prepare(Native Method)
07-09 11:32:00.679: W/System.err(5397):

public class WifiActivityActivity extends Activity {
	private Button btn_01;
	private WifiManager mWifiManager;
	private String TAG = "WifiActivityActivity";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		btn_01 = (Button) findViewById(R.id.button1);
		btn_01.setOnClickListener(new OnClickListener() {

			@SuppressLint("ParserError")
			@Override
			public void onClick(View v) {
				mWifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
				Log.i(TAG, "mWifiManager statue" + mWifiManager.isWifiEnabled());
				if (mWifiManager.isWifiEnabled() == false) {
					mWifiManager.setWifiEnabled(true);
				}

			Message msg=mHandler.obtainMessage(1);
			mHandler.sendMessage(msg);
			
				

			}
		});
	}

	public void palyStone(){
		MediaPlayer mp = new MediaPlayer();
		AssetManager assetMger = getAssets();
		AssetFileDescriptor fileDesri;

		// uri=RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
		try {
			// mp.setDataSource(WifiActivityActivity.this, uri);
			fileDesri = assetMger.openFd("ringer/ring_wifi_error.mp3");
			mp.setDataSource(fileDesri.getFileDescriptor());
			mp.prepare();
			mp.start();
		} catch (IllegalArgumentException e1) {

			e1.printStackTrace();
		} catch (SecurityException e1) {

			e1.printStackTrace();
		} catch (IllegalStateException e1) {

			e1.printStackTrace();
		} catch (IOException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		
	}
	private Handler mHandler = new Handler() {

		public void handleMessage(Message msg) {
			switch (msg.what) {
			case 1:
				palyStone();
				
				break;

			default:
				break;
			}

		};
	};
}

[AMinfo]

文件不存在，参数传递不正确。

[hvk687]

1. mp.setDataSource(fileDesri.getFileDescriptor());
这边设置的是路径path.直接用文件的路径就可以
2. MediaPlayer mp = new MediaPlayer();
这个东西要设置成成员变量，因为MediaPlayer用完后是要释放的，不然会有memory leak.