Android游戏开发学习笔记（三）：视频的播放

一、在命令行下输入mksdcard 512M c:\sdcard.img命令，创建sdcard镜像文件。

二、单击Eclipse的菜单命令“Window/Preferences”，打开Preferences窗口，在左侧选中“Android/Launch”，在右侧的“Default emulator options”中填入“-sdcard c:\sdcard.img”。

三、启动模拟器，切换视图到DDMS，找到“File Explorer”窗口，选中“mnt/sdcard”，执行右上角的“Push a file onto the device”，向sdcard中添加视频文件“qtfy01.3gp”。

四、编写项目的布局文件main.xml，代码如下：

<?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/surfaceView"
android:layout_width="fill_parent"
android:layout_height="380px"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<Button
android:id="@+id/play_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放"
/>
<Button
android:id="@+id/pause_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="暂停"
/>
</LinearLayout>
</LinearLayout>
五、编写MainActivity.java代码。

package game.test;

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 MainActivity extends Activity implements SurfaceHolder.Callback {
String path = "/sdcard/qtfy01.3gp";
Button play_btn, pause_btn;
boolean isPause = false;
SurfaceHolder surfaceHolder;
MediaPlayer mediaPlayer;
SurfaceView surfaceView;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
play_btn = (Button) findViewById(R.id.play_btn);
play_btn.setOnClickListener(video_listener);
pause_btn = (Button) findViewById(R.id.pause_btn);
pause_btn.setOnClickListener(video_listener);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setFixedSize(176, 144);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mediaPlayer = new MediaPlayer();
}

private OnClickListener video_listener = new OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.play_btn:
isPause = false;
playVideo(path);
break;

case R.id.pause_btn:
if (isPause == false) {
mediaPlayer.pause();
isPause = true;
} else {
mediaPlayer.start();
isPause = false;
}
break;
}
}

private void playVideo(String path) {
// TODO Auto-generated method stub
if (mediaPlayer.isPlaying() == true) {
mediaPlayer.reset();
}
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDisplay(surfaceHolder);
try {
mediaPlayer.setDataSource(path);
mediaPlayer.prepare();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
mediaPlayer.start();
}
};

@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}

本文出自 “Android学习心得” 博客，请务必保留此出处http://jlyh225.blog.51cto.com/1464469/655881