Android的播放视频功能

待我称王封你为后i 2022-08-06 15:04 230阅读 0赞

实现播放视频有两种方式，一种是使用VideoView；一种是使用SurfaceView

# [Android之SurfaceView实现视频播放][Android_SurfaceView] #

1.案例一

布局文件：

![复制代码][copycode.gif]

主程序：

![复制代码][copycode.gif]

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
        }
    }

![复制代码][copycode.gif]

2.案例二

布局文件main.xml

![复制代码][copycode.gif]

<?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>

![复制代码][copycode.gif]

主程序VodeoPlayActivity.java

![复制代码][copycode.gif]

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();
                }
            }
        }
    }

![复制代码][copycode.gif]

VideoView

在main.xml中加入：

> <AbsoluteLayout xmlns:android="[http://schemas.android.com/apk/res/android"][http_schemas.android.com_apk_res_android]  
> android:layout\_width="fill\_parent" android:layout\_height="fill\_parent">  
> <VideoView android:id="@+id/videoView" android:layout\_width="fill\_parent"  
> android:layout\_height="fill\_parent" android:layout\_x="10px"  
> android:layout\_y="10px" />  
> </AbsoluteLayout>

在类中，加入以下代码

> super.onCreate(savedInstanceState);  
> requestWindowFeature(Window.FEATURE\_NO\_TITLE);  
> getWindow().setFlags(WindowManager.LayoutParams.FLAG\_FULLSCREEN, WindowManager.LayoutParams.FLAG\_FULLSCREEN);//设置成全屏模式  
> setRequestedOrientation(ActivityInfo.SCREEN\_ORIENTATION\_LANDSCAPE);//强制为横屏  
> setContentView(R.layout.main);  
> videoView = (VideoView) findViewById(R.id.videoView);  
> // videoView.setVideoPath("/sdcard/xyx.3gp");  
> videoView.setVideoURI(Uri.parse("/sdcard/beijinghuanyingni.mp4"));  
> MediaController mediaController = new MediaController(this);  
> videoView.setMediaController(mediaController);  
> videoView.start();  
> //videoView.requestFocus();

首先我使用的是全屏，强制横屏播放视频。.setVideoURI是设置视频的路径，这里我用的是sdcard上的视频，如果用http的，则需写完整路径。最重要的一点，我看网上有用videoView.requestFocus();来加载视屏播放，这里我没有能播放成功，改用了videoView.start();来播放。  
这种方式是使用Android自带的按钮，无需自定义暂停、播放等按钮控件。

源码见：[http://henzil.googlecode.com/svn/trunk/play/][http_henzil.googlecode.com_svn_trunk_play]

[Android_SurfaceView]: http://www.cnblogs.com/devinzhang/archive/2012/02/03/2337576.html
[copycode.gif]: /images/20220805/b6570225f5d64165b78df6925f63470c.png
[http_schemas.android.com_apk_res_android]: http://schemas.android.com/apk/res/android%22
[http_henzil.googlecode.com_svn_trunk_play]: http://henzil.googlecode.com/svn/trunk/play/