<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

2.定義 VideoView

<VideoView
        android:id="@+id/video"
 

        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center" />

3.  Activity:

public VideoView  videoView;//宣告Video 物件

videoView=(VideoView)findViewById(R.id.video);

public   void   playVedio(){
    File  file  =new File("/sdcard/Movies/視訊9　再製影象.flv"
 
);//獲取SD上的檔案---flv格式可以播放

 // File  file  =new File("/sdcard/Movies/01.楊光福_Android_JNI_什麼jni.avi");//獲取SD上的檔案

// File  file  =new File("/sdcard/Movies/Wildlife.wmv");//獲取SD上的檔案---提示無檔案

  //例項化媒體控制器
    MediaController mediaController=new MediaController(this);
    if(file.exists()){
        videoView
 
.setVideoPath(file.getAbsolutePath());//指定要播放的視訊
        videoView.setMediaController(mediaController);//設定 VideoView與 MediaCtroller關聯
        videoView.requestFocus();//讓video獲得焦點
        try{

           videoView.start();
        }catch (Exception e){
            e.printStackTrace();
            Toast.makeText(MyActivity.this,"視訊播放出錯",Toast.LENGTH_SHORT).show();

        }
        videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                Toast.makeText(MyActivity.this,"視訊播放完畢",Toast.LENGTH_SHORT).show();
            }
        });


    }else{
        Toast.makeText(MyActivity.this,"視訊檔案不存在",Toast.LENGTH_SHORT).show();

    }
}