Java Android如何通过SurfaceView和MediaPlayer视频使用/显示MediaController?
我必须使用MediaPlayer播放视频,而不是视频视图。 我有一个Xml布局的SurfaceView,在活动端有一个MediaPlayer和一个MediaController 我找不到将MediaController与SurfaceView和MediaPlayer结合使用的方法。使用VideoView非常简单,但却不知道如何使用MediaPlayer 我在网上找到了一些例子,但都是关于播放音频,而不是视频 这是我创建MediaPlayer的surfaceCreated方法Java Android如何通过SurfaceView和MediaPlayer视频使用/显示MediaController?,java,android,android-widget,Java,Android,Android Widget,我必须使用MediaPlayer播放视频,而不是视频视图。 我有一个Xml布局的SurfaceView,在活动端有一个MediaPlayer和一个MediaController 我找不到将MediaController与SurfaceView和MediaPlayer结合使用的方法。使用VideoView非常简单,但却不知道如何使用MediaPlayer 我在网上找到了一些例子,但都是关于播放音频,而不是视频 这是我创建MediaPlayer的surfaceCreated方法 @Override
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDisplay(mSurfaceHolder);
mMediaPlayer.setDataSource(this, Uri.parse(mUrl));
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.prepare();
mMediaController = new MediaController(this);
} catch (Exception e) {
Log.e(TAG, "MediaPlayer Prepare: " + e.getMessage());
}
}
而这个MediaPlayer是一个预先准备好的方法
@Override
public void onPrepared(MediaPlayer mp) {
mVideoWidth = mp.getVideoWidth();
mVideoHeight = mp.getVideoHeight();
mSurfaceHolder.setFixedSize(mVideoWidth, mVideoHeight);
startVideoPlayback();
mMediaController.setMediaPlayer(this);
handler.post(new Runnable() {
public void run() {
mMediaController.setEnabled(true);
mMediaController.show();
}
});
}
上面的代码没有在SurfaceView上显示MediaController。我怎样才能做到这一点
提前感谢。为此,您必须实施活动
OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener,
OnVideoSizeChangedListener, SurfaceHolder.Callback, MediaPlayerControl
检查下面的工作代码
package com.example.demo;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.media.MediaPlayer.OnVideoSizeChangedListener;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.MediaController;
import android.widget.MediaController.MediaPlayerControl;
import android.widget.ProgressBar;
public class MainActivity extends Activity implements OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener,
OnVideoSizeChangedListener, SurfaceHolder.Callback, MediaPlayerControl{
String url = "your video url";
MediaPlayer mMediaPlayer ;
SurfaceView mSurfaceView ;
SurfaceHolder holder ;
private ConstantAnchorMediaController controller = null;
ProgressBar progressBar1 ;
MediaController mcontroller ;
Handler handler ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar1 = (ProgressBar)findViewById(R.id.progressBar1);
SurfaceView v = (SurfaceView) findViewById(R.id.surface);
handler = new Handler();
holder = v.getHolder();
holder.addCallback(this);
playVideo();
}
private void playVideo() {
try {
mcontroller = new MediaController(this);
mMediaPlayer = MediaPlayer.create(this, Uri.parse(url));
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setScreenOnWhilePlaying(true);
mMediaPlayer.setOnVideoSizeChangedListener(this);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
mcontroller.show();
return false;
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
mMediaPlayer.setDisplay(holder);
try {
mMediaPlayer.start();
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
// TODO Auto-generated method stub
}
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
// TODO Auto-generated method stub
}
@Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
progressBar1.setVisibility(View.GONE);
mcontroller.setMediaPlayer(this);
mcontroller.setAnchorView(findViewById(R.id.surface));
mcontroller.setEnabled(true);
handler.post(new Runnable() {
public void run() {
mcontroller.show();
}
});
}
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
// TODO Auto-generated method stub
}
public void start() {
mMediaPlayer.start();
}
public void pause() {
mMediaPlayer.pause();
}
public int getDuration() {
return mMediaPlayer.getDuration();
}
public int getCurrentPosition() {
return mMediaPlayer.getCurrentPosition();
}
public void seekTo(int i) {
mMediaPlayer.seekTo(i);
}
public boolean isPlaying() {
return mMediaPlayer.isPlaying();
}
public int getBufferPercentage() {
return 0;
}
public boolean canPause() {
return true;
}
public boolean canSeekBackward() {
return true;
}
public boolean canSeekForward() {
return true;
}
}
我尝试了这段代码,但它显示应用程序已停止,我确实需要帮助。请不要启动应用程序,它只显示应用程序已停止,在代码端没有错误displayed@Lily下载工作演示-我试过了,同样的问题,应用程序没有启动,只是显示应用程序已停止。有什么建议吗?这是日志cat上显示的消息:E/AndroidRuntime(20047):java.lang.RuntimeException:无法实例化活动组件信息{com.example.mediaplayer\u surf/com.example.mediaplayer\u surf.MainActivity}:java.lang.ClassNotFoundException:未找到类“com.example.mediaplayer\u surf.MainActivity”“在路径上:/data/app/com.example.mediaplayer_surf-2.apk”,然后还有其他不适合此处的消息