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{

privateSurfaceView surfaceView;

privateSurfaceHolder surfaceHolder;

privateMediaPlayer mediaPlayer;

@Override

publicvoidonCreate(Bundle savedInstanceState) {

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

AssetFileDescriptor aFD = this.getAssets().openFd("welcome.3gp");

FileDescriptor fileDescriptor = aFD.getFileDescriptor();

this.mediaPlayer =newMediaPlayer();

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("http://xy2.163.com/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

publicvoidsurfaceChanged(SurfaceHolder holder,intformat,intwidth,

intheight) {

}

@Override

publicvoidsurfaceCreated(SurfaceHolder holder) {

//SurfaceCreated 创建成功才可以播放视频

PlayVideo();

}

@Override

publicvoidsurfaceDestroyed(SurfaceHolder holder) {

}

//@Override

publicvoidonBufferingUpdate(MediaPlayer mp,intpercent) {

// TODO Auto-generated method stub

}

//@Override

publicvoidonCompletion(MediaPlayer mp) {

// TODO Auto-generated method stub

}

//@Override

publicvoidonPrepared(MediaPlayer mp) {

//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("http://xy2.163.com/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.