Android开发之初探视频的播放

/*

* Android开发之初探视频的播放

* 北京Android俱乐部群：167839253

* Created on: 2011-8-24

* Author: blueeagle

* Email: liujiaxiang@gmail.com

*/

Android下视频的播放跟音频的播放是有一些区别的。需要有一个空间来存放视频文件。关于视频的播放其实费了一点功夫，程序代码很简单，但是对于播放，可能会出这样那样的问题，现在总结一下，步骤如下：

1.创建sdcard的镜像文件，可以在命令行下输入mksdcard 512M C:\sdcard.img

2.在Eclipse的window下找到Preferences菜单，然后点击Android->launch然后在Default emulator Options中填上“-sdcard C:\sdcard.img”

3.运行模拟器

有些时候，这样并不能成功，可以直接push到模拟器中。注意一定要选择一个小一点的3gp文件。

代码如下：

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/*

* Android开发之视频的播放

* MyVideo.java

* Created on: 2011-8-24

* Author: blueeagle

* Email: liujiaxiang@gmail.com

*/

package com.blueeagle;

import android.app.Activity;

import android.graphics.PixelFormat;

import android.media.AudioManager;

import android.media.MediaPlayer;

import android.os.Bundle;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MyVideo extends Activity implements OnClickListener,SurfaceHolder.Callback{

String path = "/data/222.3gp";

Button play_button;

Button pause_button;

boolean isPause = false;

SurfaceView mySurfaceView;

MediaPlayer myMediaPlayer;

SurfaceHolder surfaceHolder;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

play_button = (Button)findViewById(R.id.myButton);

play_button.setOnClickListener(this);

pause_button = (Button)findViewById(R.id.myButton2);

pause_button.setOnClickListener(this);

getWindow().setFormat(PixelFormat.UNKNOWN);

mySurfaceView = (SurfaceView)findViewById(R.id.mySurfaceView);

surfaceHolder = mySurfaceView.getHolder();

surfaceHolder.addCallback(this);

surfaceHolder.setFixedSize(176,144);

surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

myMediaPlayer = new MediaPlayer();

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if(v==play_button)

{

isPause = false;

System.out.println(path);

playVideo(path);

}

else if(v==pause_button){

if(isPause == false){

myMediaPlayer.pause();

isPause = true;

}

else{

myMediaPlayer.start();

isPause = false;

}

}

}

private void playVideo(String strPath){

if(myMediaPlayer.isPlaying()==true){

myMediaPlayer.reset();

}

myMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

myMediaPlayer.setDisplay(surfaceHolder);//设置Video影片以SurfaceHolder播放

try{

myMediaPlayer.setDataSource(strPath);

myMediaPlayer.prepare();

}

catch(Exception e){

e.printStackTrace();

}

myMediaPlayer.start();

}

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

// TODO Auto-generated method stub

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

// TODO Auto-generated method stub

}

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

// TODO Auto-generated method stub

}

}

main.xml

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<SurfaceView

android:id = "@+id/mySurfaceView"

android:layout_width="320px"

android:layout_height="200px">

</SurfaceView>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<Button

android:id="@+id/myButton"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="播放"/>

<Button

android:id="@+id/myButton2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="暂停"/>

</LinearLayout>

</LinearLayout>

运行结果如下图：