使用SurfaceView播放视频,其实很简单,但是经常会碰见有声音没图像的问题.
其实使用SurfaceView播放视频只需要主要下面几个地方就可以了
1. surfaceChanged也就是Suface是否创建成功
2. onPrepared 也就是MideoPlayer是否加载并准备完成
3. surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
类型必须是SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS
Java代码
packageVideoTest.Test;
importjava.io.FileDescriptor;
importandroid.app.Activity;
importandroid.content.res.AssetFileDescriptor;
importandroid.media.AudioManager;
importandroid.media.MediaPlayer;
importandroid.media.MediaPlayer.OnBufferingUpdateListener;
importandroid.media.MediaPlayer.OnCompletionListener;
importandroid.media.MediaPlayer.OnPreparedListener;
importandroid.os.Bundle;
importandroid.view.SurfaceHolder;
importandroid.view.SurfaceView;
publicclassVideoTestextendsActivityimplementsSurfaceHolder.Callback,
OnBufferingUpdateListener,OnCompletionListener,OnPreparedListener{
privateSurfaceViewsurfaceView;
privateSurfaceHoldersurfaceHolder;
privateMediaPlayermediaPlayer;
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
this.surfaceView=newSurfaceView(this);
this.surfaceHolder=this.surfaceView.getHolder();
this.surfaceHolder.addCallback(this);
//类型必须设置成SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS
this.surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
setContentView(this.surfaceView);
}
@Override
publicvoidonDestroy(){
super.onDestroy();
if(this.mediaPlayer!=null){
this.mediaPlayer.release();
this.mediaPlayer=null;
}
}
publicvoidPlayVideo(){
try{
//视频文件放在assert中
AssetFileDescriptoraFD=this.getAssets().openFd("welcome.3gp");
FileDescriptorfileDescriptor=aFD.getFileDescriptor();
this.mediaPlayer=newMediaPlayer();
this.mediaPlayer.setDataSource(fileDescriptor,aFD.getStartOffset(),aFD.getLength());
aFD.close();
//视频放在SDCard中
//FilesdFile=Environment.getExternalStorageDirectory();
//this.mediaPlayer=newMediaPlayer();
//this.mediaPlayer.setDataSource(sdFile.getAbsoluteFile()+File.separator+"welcome.3gp");
//视频放在res中
//this.mediaPlayer=MediaPlayer.create(this,R.raw.welcome);
//网上的视频,没有测试
//this.mediaPlayer
//.setDataSource("/download/down/wukong.mp3");
this.mediaPlayer.setDisplay(this.surfaceHolder);
this.mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//准备完成后才可以播放,另外如果文件特别大或者从网上获得的资源
//会在这里等待时间过长,造成堵塞,这样的话就得用
//this.mediaPlayer.prepareAsync(),然后监听是否准备完毕在开始
this.mediaPlayer.prepare();
this.mediaPlayer.start();
}catch(Exceptione){
//TODO:handleexception
}
}
@Override
publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth,
intheight){
}
@Override
publicvoidsurfaceCreated(SurfaceHolderholder){
//SurfaceCreated创建成功才可以播放视频
PlayVideo();
}
@Override
publicvoidsurfaceDestroyed(SurfaceHolderholder){
}
//@Override
publicvoidonBufferingUpdate(MediaPlayermp,intpercent){
//TODOAuto-generatedmethodstub
}
//@Override
publicvoidonCompletion(MediaPlayermp){
//TODOAuto-generatedmethodstub
}
//@Override
publicvoidonPrepared(MediaPlayermp){
//MediaPlayer加载准备完毕才能开始播放
//mp.start();
}
}
package VideoTest.Test;
import java.io.FileDescriptor;
import android.app.Activity;
import android.content.res.AssetFileDescriptor;
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.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class VideoTest extends Activity implements SurfaceHolder.Callback,
OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener{
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private MediaPlayer mediaPlayer;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.surfaceView = new SurfaceView(this);
this.surfaceHolder = this.surfaceView.getHolder();
this.surfaceHolder.addCallback(this);
//类型必须设置成SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS
this.surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
setContentView(this.surfaceView);
}
@Override
public void onDestroy() {
super.onDestroy();
if (this.mediaPlayer != null) {
this.mediaPlayer.release();
this.mediaPlayer = null;
}
}
public void PlayVideo(){
try {
//视频文件放在 assert中
AssetFileDescriptor aFD = this.getAssets().openFd("welcome.3gp");
FileDescriptor fileDescriptor = aFD.getFileDescriptor();
this.mediaPlayer = new MediaPlayer();
this.mediaPlayer.setDataSource(fileDescriptor, aFD.getStartOffset(), aFD.getLength());
aFD.close();
//视频放在SDCard中
//File sdFile = Environment.getExternalStorageDirectory();
//this.mediaPlayer = new MediaPlayer();
//this.mediaPlayer.setDataSource(sdFile.getAbsoluteFile() + File.separator + "welcome.3gp");
//视频放在res中
//this.mediaPlayer = MediaPlayer.create(this, R.raw.welcome);
//网上的视频,没有测试
//this.mediaPlayer
//.setDataSource("/download/down/wukong.mp3");
this.mediaPlayer.setDisplay(this.surfaceHolder);
this.mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//准备完成后才可以播放,另外如果文件特别大或者从网上获得的资源
//会在这里等待时间过长,造成堵塞,这样的话就得用
//this.mediaPlayer.prepareAsync(),然后监听是否准备完毕在开始
this.mediaPlayer.prepare();
this.mediaPlayer.start();
} catch (Exception e) {
// TODO: handle exception
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
//SurfaceCreated 创建成功才可以播放视频
PlayVideo();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
//@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
// TODO Auto-generated method stub
}
//@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
}
//@Override
public void onPrepared(MediaPlayer mp) {
//MediaPlayer加载准备完毕才能开始播放
//mp.start();
}
}
但是,对于一些人可能会产生另一个问题就是
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
在设置成SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS类型后,无法画图了
SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS的意思是创建一个"PUSH"surface,这个surface没有自己的缓冲区,没有自己的缓冲Buffer.
