Use of Android native video playback VideoView

<RelativeLayout xmlns:andro
 xmlns:tools="/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity">
 
 <VideoView
  android:
  android:layout_width="match_parent"
  android:layout_height="match_parent" />
 <ProgressBar
  android:
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_centerInParent="true" />
</RelativeLayout>

package ;
 
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public class VideoActivity extends AppCompatActivity {
 private ProgressBar progressBar;
 private VideoView videoView;
 private MediaController mediaController;
 private int intPositionWhenPause = -1;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  (savedInstanceState);
  setContentView(.activity_video);
 
  //Call the third-party player that comes with video playback or installed in the system//  Uri uri=("/mda-ig4tp6gnqwu5we8i/mda-ig4tp6gnqwu5we8i.mp4");
//  Intent intent=new Intent(Intent.ACTION_VIEW);
//  (uri,"video/*");
 // startActivity(intent);
 
   initVideoView();
  }
 
  /**
   * Initialize videoview playback
   */
 public void initVideoView() {
  //Initialization progress bar  progressBar = (ProgressBar) findViewById();
  //Initialize VideoView  videoView = (VideoView) findViewById();
  //Initialize the videoview control bar  mediaController = new MediaController(this);
  //Set the videoview control bar  (mediaController);
  //Set the display control bar  (0);
  //Steps after the playback is completed  (new () {
   @Override
   public void onCompletion(MediaPlayer mp) {
 
   }
  });
  //Set error listening. If you do not set the videoview, it will prompt the user for an error.  (new () {
   @Override
   public boolean onError(MediaPlayer mp, int what, int extra) {
    return false;
   }
  });
  //Set the callback function after the video file is loaded  (new () {
   @Override
   public void onPrepared(MediaPlayer mp) {
    ();
    ();
   }
  });
  //Set the videoView's click monitoring  (new () {
   @Override
   public boolean onTouch(View v, MotionEvent event) {
    return false;
   }
  });
  //Set the network video path  Uri uri = ("/mda-ig4tp6gnqwu5we8i/mda-ig4tp6gnqwu5we8i.mp4");
  (uri);
  //Set to full screen mode playback  setVideoViewLayoutParams(2);
 }
 
 /**
   * Set the videoview full screen and window modes
   *
   * @param paramsType Identification 1 is full screen mode 2 is window mode
   */
 public void setVideoViewLayoutParams(int paramsType) {
  //Full screen mode  if (1 == paramsType) {
   //Set full of the entire parent layout    LayoutParams = new (.MATCH_PARENT, .MATCH_PARENT);
   //Set the four sides aligned relative to the parent layout   (RelativeLayout.ALIGN_PARENT_BOTTOM);
   (RelativeLayout.ALIGN_PARENT_TOP);
   (RelativeLayout.ALIGN_PARENT_LEFT);
   (RelativeLayout.ALIGN_PARENT_RIGHT);
   //Add attributes for VideoView   (LayoutParams);
  } else {
   //Window mode   //Get the width and height of the entire screen   DisplayMetrics DisplayMetrics = new DisplayMetrics();
   ().getDefaultDisplay().getMetrics(DisplayMetrics);
   //Set the window mode distance 50 border   int videoHeight = ;
   int videoWidth = ;
    LayoutParams = new (videoWidth, videoHeight);
   //Set centered   (RelativeLayout.ALIGN_TOP);
   //Add attributes for VideoView   (LayoutParams);
  }
 }
 
 /**
   * Page pause effect processing
   */
 @Override
 protected void onPause() {
  ();
  //If the current page is paused, save the current playback position and save the global variable  intPositionWhenPause = ();
  //Stop playing back video files  ();
 }
 
 /**
   * Page resumes from pause
   */
 @Override
 protected void onResume() {
  ();
  //Jump to the saved position when paused  if (intPositionWhenPause >= 0) {
   (intPositionWhenPause);
   //Initial playback position   intPositionWhenPause = -1;
  }
 }
}