android多媒体类VideoView使用方法详解

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:app="http://schemas.android.com/apk/res-auto"   xmlns:tools="http://schemas.android.com/tools"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:orientation="vertical"   tools:context="com.example.lk.playvideotest.MainActivity">    <LinearLayout     android:layout_width="match_parent"     android:layout_height="wrap_content">     <Button       android:id="@+id/play"       android:layout_width="0dp"       android:layout_height="wrap_content"       android:layout_weight="1"       android:text="Play"       android:textAllCaps="false"/>     <Button       android:id="@+id/pause"       android:layout_width="0dp"       android:layout_height="wrap_content"       android:layout_weight="1"       android:text="Pause"       android:textAllCaps="false"/>     <Button       android:id="@+id/replay"       android:layout_width="0dp"       android:layout_height="wrap_content"       android:layout_weight="1"       android:text="RePlay"       android:textAllCaps="false"/>   </LinearLayout>   <VideoView     android:id="@+id/video_view"     android:layout_width="match_parent"     android:layout_height="wrap_content" />  </LinearLayout> 

public class MainActivity extends AppCompatActivity implements View.OnClickListener {   private VideoView videoView;    @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     videoView = (VideoView) findViewById(R.id.video_view);     Button play = (Button) findViewById(R.id.play);     Button pause = (Button) findViewById(R.id.pause);     Button replay = (Button) findViewById(R.id.replay);      play.setOnClickListener(this);     pause.setOnClickListener(this);     replay.setOnClickListener(this);     if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {       ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);     } else {       initVideoPath();     }   }    private void initVideoPath() {     File file = new File(Environment.getExternalStorageDirectory(), "movie.mp4");     videoView.setVideoPath(file.getPath());//指定视频文件的路径   }    @Override   public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {      switch (requestCode) {       case 1:         if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {           initVideoPath();         } else {           Toast.makeText(this, "拒绝权限将无法使用程序", Toast.LENGTH_SHORT).show();           finish();         }         break;       default:      }   }    @Override   public void onClick(View v) {     switch (v.getId()) {       case R.id.play:         if (!videoView.isPlaying()) {           videoView.start();//开始播放         }         break;       case R.id.pause:         if (!videoView.isPlaying()) {           videoView.pause();//暂停播放         }         break;       case R.id.replay:         if (!videoView.isPlaying()) {           videoView.resume();//重新播放         }         break;     }    }    @Override   protected void onDestroy() {     super.onDestroy();     if (videoView != null) {       videoView.suspend();//将VideoView所占用的资源释放掉     }   } } 

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