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：

                    <?xmlversion="1.0"encoding="utf-8"?>
            <LinearLayoutxmlns: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。

                    packagegame.test; 
            
            importandroid.app.Activity; 
            importandroid.graphics.PixelFormat; 
            importandroid.media.AudioManager; 
            importandroid.media.MediaPlayer; 
            importandroid.os.Bundle; 
            importandroid.view.SurfaceHolder; 
            importandroid.view.SurfaceView; 
            importandroid.view.View; 
            importandroid.view.View.OnClickListener; 
            importandroid.widget.Button; 
            
            publicclassMainActivityextendsActivityimplementsSurfaceHolder.Callback{ 
            Stringpath="/sdcard/qtfy01.3gp"; 
            Buttonplay_btn,pause_btn; 
            booleanisPause=false; 
            SurfaceHoldersurfaceHolder; 
            MediaPlayermediaPlayer; 
            SurfaceViewsurfaceView; 
            
            /**Calledwhentheactivityisfirstcreated.*/
            @Override
            publicvoidonCreate(BundlesavedInstanceState){ 
            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=newMediaPlayer(); 
            } 
            
            privateOnClickListenervideo_listener=newOnClickListener(){ 
            @Override
            publicvoidonClick(Viewv){ 
            switch(v.getId()){ 
            caseR.id.play_btn: 
            isPause=false; 
            playVideo(path); 
            break; 
            
            caseR.id.pause_btn: 
            if(isPause==false){ 
            mediaPlayer.pause(); 
            isPause=true; 
            }else{ 
            mediaPlayer.start(); 
            isPause=false; 
            } 
            break; 
            } 
            } 
            
            privatevoidplayVideo(Stringpath){ 
            //TODOAuto-generatedmethodstub 
            if(mediaPlayer.isPlaying()==true){ 
            mediaPlayer.reset(); 
            } 
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
            mediaPlayer.setDisplay(surfaceHolder); 
            try{ 
            mediaPlayer.setDataSource(path); 
            mediaPlayer.prepare(); 
            }catch(Exceptione){ 
            //TODO:handleexception 
            e.printStackTrace(); 
            } 
            mediaPlayer.start(); 
            } 
            }; 
            
            @Override
            publicvoidsurfaceCreated(SurfaceHolderholder){ 
            //TODOAuto-generatedmethodstub 
            } 
            
            @Override
            publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth, 
            intheight){ 
            //TODOAuto-generatedmethodstub 
            } 
            
            @Override
            publicvoidsurfaceDestroyed(SurfaceHolderholder){ 
            //TODOAuto-generatedmethodstub 
            } 
            }

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