android–媒体播放器中没有控制按钮显示

我是Android的新手,我试图制作一个非常简单的应用程序.它只是一个包含用于播放音频或视频文件的MediaPlayer的活动.
我设法播放了一首歌,但它不会向我展示媒体播放器的控制元素！

这是我使用的代码：

`public class Player extends Activity实现OnPreparedListener,
        MediaPlayerControl {

private static final String TAG = "AudioPlayer";
public static final String AUDIO_FILE_NAME = "audioFileName";
private String audioFile;
private MediaPlayer mediaPlayer;
private Handler handler = new Handler();
private MediaController mediaController;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_player);
Uri myUri = Uri.parse("android.resource://com.example.mediaplayer/"
+ R.raw.lied); // initialize Uri here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaCOntroller= new MediaController(this);
try {
mediaPlayer.setDataSource(getApplicationContext(), myUri);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException 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();
}
try {
mediaPlayer.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mediaPlayer.start();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.player, menu);
return true;
}
public void onPrepared(MediaPlayer mediaPlayer) {
Log.d(TAG, "onPrepared");
mediaController.setMediaPlayer(this);
mediaController.setAnchorView(findViewById(R.id.mediaController1));
handler.post(new Runnable() {
public void run() {
mediaController.setEnabled(true);
mediaController.show();
}
});
}
protected void onStop() {
super.onStop();
mediaPlayer.stop();
mediaPlayer.release();
}
public boolean onTouchEvent(MotionEvent event) {
// the MediaController will hide after 3 seconds - tap the screen to
// make it appear again
mediaController.show();
return false;
}
public boolean canPause() {
return true;
}
public boolean canSeekBackward() {
return true;
}
public boolean canSeekForward() {
return true;
}
public int getBufferPercentage() {
return 0;
}
public int getCurrentPosition() {
return mediaPlayer.getCurrentPosition();
}
public int getDuration() {
return mediaPlayer.getDuration();
}
public boolean isPlaying() {
return mediaPlayer.isPlaying();
}
public void pause() {
mediaPlayer.pause();
}
public void seekTo(int i) {
mediaPlayer.seekTo(i);
}
public void start() {
mediaPlayer.start();
}


}`

这是我的布局xml：

`

android:id="@+id/mediaController1"
android:layout_
android:layout_
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="122dp"
android:layout_marginTop="55dp"
android:visibility="visible" >

android:id="@+id/videoView1"
android:layout_
android:layout_
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />


`

希望你能帮我 ：-/

解决方法:

我认为你所寻找的是Android中的视频.播放媒体时有默认控件.

在xml布局文件夹中创建一个videoview,如下所示：

android:orientation="vertical"
android:layout_
android:layout_>
android:id="@+id/myvideoview"
android:layout_
android:layout_ />



假设您调用了该文件main.xml

现在创建一个名为MediaViewerTest.java的活动,如下所示：

public class MediaViewerTest extends Activity {
String SrcPath = http://myMediaFile.mp3"; // or however your getting your media source, im assuming web here
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
VideoView myVideoView = (VideoView)findViewById(R.id.myvideoview);
myVideoView.setVideoURI(Uri.parse(SrcPath));
myVideoView.setMediaController(new MediaController(this));
myVideoView.requestFocus();
myVideoView.start();
}
}