android中使用surfaceview进行视频播放

//布局文件<?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" android:weightSum="1">    <SurfaceView android:layout_height="220dip" android:layout_gravity="center" android:id="@+id/surface" android:layout_weight="0.25" android:layout_width="320dip"></SurfaceView>    <LinearLayout android:id="@+id/linearLayout1" android:layout_height="wrap_content" android:layout_width="fill_parent">        <Button android:text="播放" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>        <Button android:text="暂停" android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>        <Button android:text="停止" android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>    </LinearLayout></LinearLayout>

//主界面，，，

public class SurfaceActivity extends Activity implements SurfaceHolder.Callback {    /** Called when the activity is first created. */    MediaPlayer player;    SurfaceView surface;    SurfaceHolder surfaceHolder;    Button play,pause,stop;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        play=(Button)findViewById(R.id.button1);        pause=(Button)findViewById(R.id.button2);        stop=(Button)findViewById(R.id.button3);        surface=(SurfaceView)findViewById(R.id.surface);        surfaceHolder=surface.getHolder();　　//SurfaceHolder是SurfaceView的控制接口        surfaceHolder.addCallback(this); 　　//因为这个类实现了SurfaceHolder.Callback接口，所以回调参数直接this        surfaceHolder.setFixedSize(320, 220);　　//显示的分辨率,不设置为视频默认        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);　　//Surface类型        play.setOnClickListener(new OnClickListener(){             @Override            public void onClick(View v) {                player.start();            }});        pause.setOnClickListener(new OnClickListener(){            @Override            public void onClick(View v) {                player.pause();            }});        stop.setOnClickListener(new OnClickListener(){             @Override            public void onClick(View v) {                player.stop();            }});    }    @Override    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {    }    @Override    public void surfaceCreated(SurfaceHolder arg0) {//必须在surface创建后才能初始化MediaPlayer,否则不会显示图像        player=new MediaPlayer();        player.setAudioStreamType(AudioManager.STREAM_MUSIC);        player.setDisplay(surfaceHolder);        //设置显示视频显示在SurfaceView上            try {                player.setDataSource("/sdcard/3.mp4");                player.prepare();            } catch (Exception e) {                e.printStackTrace();            }    }    @Override    public void surfaceDestroyed(SurfaceHolder arg0) {        // TODO Auto-generated method stub    }    @Override    protected void onDestroy() {        // TODO Auto-generated method stub        super.onDestroy();        if(player.isPlaying()){        player.stop();        }        player.release();        //Activity销毁时停止播放，释放资源。不做这个操作，即使退出还是能听到视频播放的声音    }}

<?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" android:background="#ffffff" ><TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/filename" /><EditText android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="oppo.mp4" android:id="@+id/filename" /><LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" >    <ImageButton android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/play" android:id="@+id/play" />    <ImageButton android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/pause" android:id="@+id/pause" />    <ImageButton android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/stop" android:id="@+id/stop" />    <ImageButton android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/reset" android:id="@+id/reset" /></LinearLayout> <SurfaceView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/surfaceview" /></LinearLayout>

public class VodeoPlayActivity extends Activity {    /** Called when the activity is first created. */    private EditText filenamEditText;    private MediaPlayer mediaPlayer;    private String filename;    private SurfaceView surfaceView;    private final static String TAG="VodeoPlayActivity";    private int prosition=0;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        filenamEditText=(EditText) this.findViewById(R.id.filename);        surfaceView=(SurfaceView)this.findViewById(R.id.surfaceview);        surfaceView.getHolder().setFixedSize(176, 144);//设置分辨率        surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//设置surfaceview不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前        surfaceView.getHolder().addCallback(new SurceCallBack());//对surface对象的状态进行监听        mediaPlayer=new MediaPlayer();        ButtonOnClikListiner buttonOnClikListinero=new ButtonOnClikListiner();        ImageButton start=(ImageButton) this.findViewById(R.id.play);        ImageButton pause=(ImageButton) this.findViewById(R.id.pause);        ImageButton stop=(ImageButton) this.findViewById(R.id.stop);        ImageButton replay=(ImageButton) this.findViewById(R.id.reset);        start.setOnClickListener(buttonOnClikListinero);        pause.setOnClickListener(buttonOnClikListinero);        stop.setOnClickListener(buttonOnClikListinero);        replay.setOnClickListener(buttonOnClikListinero);    }    private final class ButtonOnClikListiner implements View.OnClickListener{        @Override        public void onClick(View v) {            if(Environment.getExternalStorageState()==Environment.MEDIA_UNMOUNTED){                Toast.makeText(VodeoPlayActivity.this, "sd卡不存在", Toast.LENGTH_SHORT).show();                return;            }            filename=filenamEditText.getText().toString();            switch (v.getId()) {            case R.id.play:                play();                break;            case R.id.pause:                if(mediaPlayer.isPlaying()){                    mediaPlayer.pause();                }else{                    mediaPlayer.start();                }                break;            case R.id.reset:                if(mediaPlayer.isPlaying()){                    mediaPlayer.seekTo(0);                }else{                    play();                }                break;            case R.id.stop:                if(mediaPlayer.isPlaying()){                    mediaPlayer.stop();                }                break;            }        }      }    private void play() {        try {                File file=new File(Environment.getExternalStorageDirectory(),filename);                mediaPlayer.reset();//重置为初始状态                mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);//设置音乐流的类型                mediaPlayer.setDisplay(surfaceView.getHolder());//设置video影片以surfaceviewholder播放                mediaPlayer.setDataSource(file.getAbsolutePath());//设置路径                mediaPlayer.prepare();//缓冲                mediaPlayer.start();//播放            } catch (Exception e) {                Log.e(TAG, e.toString());                e.printStackTrace();            }    }    private final class SurceCallBack implements SurfaceHolder.Callback{        /** * 画面修改 */        @Override        public void surfaceChanged(SurfaceHolder holder, int format, int width,                int height) {            // TODO Auto-generated method stub        }        /** * 画面创建 */        @Override        public void surfaceCreated(SurfaceHolder holder) {            if(prosition>0&&filename!=null){                play();                mediaPlayer.seekTo(prosition);                prosition=0;            }        }        /** * 画面销毁 */        @Override        public void surfaceDestroyed(SurfaceHolder holder) {            if(mediaPlayer.isPlaying()){                prosition=mediaPlayer.getCurrentPosition();                mediaPlayer.stop();            }        }    }}

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