Android ViewPager achieves image turnover effect

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public class MainActivity extends Activity implements OnPageChangeListener { 
  
 protected static final String TAG = "MainActivity"; 
 private List<ImageView> imageViewList; 
 private ViewPager mViewPager; 
 private final int[] imageResIDs = { 
   , 
   , 
   , 
   , 
    
 }; 
 private final String[] imageDescriptions = { 
   "Gong Li is not vulgar, so I can't be vulgar", 
   "The tree is back! Singing classic old songs to attract thousands of people to sing", 
   "Revealing the secret of how Beijing movies are upgraded", 
   "LeTV TV version delivery", 
   "The hot-blooded loser's counterattack" 
 }; 
 private TextView tvImageDescription; // Picture description private LinearLayout llPointGroup;  // Group of point controls private int previousPosition = 0;  // The previous position selected by viewpager private boolean isStop = false; // Control whether the child thread of the loop is stopped  
 private Handler handler = new Handler(){ 
 
  @Override 
  public void handleMessage(Message msg) { 
   (msg); 
    
   (() + 1); 
  } 
 }; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  (savedInstanceState); 
  setContentView(.activity_main); 
   
  initView(); 
   
  new Thread(new Runnable() { 
 
   @Override 
   public void run() { 
    // Send a message to the main thread every two seconds to switch the viewpager interface    while(!isStop) { 
     (2000); 
      
     (0); 
    } 
    (TAG, "The loop thread has stopped"); 
   }}).start(); 
 } 
  
 @Override 
 protected void onDestroy() { 
  isStop = true; 
  (); 
 } 
 
 private void initView() { 
  mViewPager = (ViewPager) findViewById(); 
  llPointGroup = (LinearLayout) findViewById(.ll_point_group); 
  tvImageDescription = (TextView) findViewById(.tv_image_description); 
   
  imageViewList = new ArrayList<ImageView>(); 
   
  ImageView iv; 
  View pointView; 
  LayoutParams params; 
  for (int i = 0; i < ; i++) { 
   iv = new ImageView(this); 
   (imageResIDs[i]); 
   (iv); 
    
   // Add points according to the picture   pointView = new View(this); 
   params = new LayoutParams(5, 5); 
    = 5; 
   (params); 
   (false); 
   (.point_bg); 
   (pointView); 
  } 
   
  MyPagerAdapter mAdapter = new MyPagerAdapter(); 
  (mAdapter); 
  (this); 
   
  int item = (Integer.MAX_VALUE / 2) - ((Integer.MAX_VALUE / 2) % ()); 
  (item);  // Set the position of the currently selected item   
  (imageDescriptions[previousPosition]); 
  (previousPosition).setEnabled(true); // The first point is selected } 
  
  
 class MyPagerAdapter extends PagerAdapter { 
 
  @Override 
  public int getCount() { 
   return Integer.MAX_VALUE; 
  } 
 
  /**
    * If the moving object and the incoming object are the same, it will return true, which means the multiplexed view object.
    * false Use object object
    */ 
  @Override 
  public boolean isViewFromObject(View arg0, Object arg1) { 
   return arg0 == arg1; 
  } 
 
  /**
    * The position of the object that needs to be destroyed is transmitted in
    */ 
  @Override 
  public void destroyItem(ViewGroup container, int position, Object object) { 
   // Remove the object with the specified position   ((position % ())); 
  } 
 
  /**
    * Load the view object at the position position
    */ 
  @Override 
  public Object instantiateItem(ViewGroup container, int position) { 
   // Add an object with the specified position   ((position % ())); 
   return (position % ()); 
  } 
 } 
 
 
 @Override 
 public void onPageScrollStateChanged(int arg0) { 
  // TODO Auto-generated method stub 
   
 } 
 
 @Override 
 public void onPageScrolled(int arg0, float arg1, int arg2) { 
  // TODO Auto-generated method stub 
   
 } 
 
 /**
   * Callback when viewpager page is switched
   * @param position is the page currently displayed
   */ 
 @Override 
 public void onPageSelected(int position) { 
  (imageDescriptions[position % ()]); 
  (position % ()).setEnabled(true); 
  (previousPosition).setEnabled(false); 
   
  previousPosition = position % (); 
 } 
}