Android touch screen test instance code

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public class TouchActivity extends Activity {
  /*Declare ImageView variable*/
  private ImageView mImageView01;
  /*Declare the relevant variables as the width and height of the stored image, use */
  private int intWidth, intHeight, intDefaultX, intDefaultY;
  private float mX, mY; 
  /*Declare the resolution variable of the storage screen */
  private int intScreenX, intScreenY;
  public void onCreate(Bundle savedInstanceState)
  {
   (savedInstanceState); 
   setContentView();
   
   /* Get screen object */
   DisplayMetrics dm = new DisplayMetrics(); 
   getWindowManager().getDefaultDisplay().getMetrics(dm);
   
   /* Get screen resolution pixels */
   intScreenX = ;
   intScreenY = ;
   
   /* Set the width and height of the picture */
   intWidth = 100;
   intHeight = 100;
   /*Create ImageView object through findViewById constructor*/ 
   mImageView01 =(ImageView) findViewById(.myImageView1);
   /* Assign the image from Drawable to ImageView to render*/
   ();
   
   /* Initialization button position is centered */
   RestoreButton();
   
   /* When clicking ImageView, restore the initial position */
   (new ()
   {
    @Override
    public void onClick(View v)
    {
     RestoreButton();
    }
   });
  }
  
  /*Overwrite touch events*/
  public boolean onTouchEvent(MotionEvent event) 
  {
   /*Get the position of the finger touch screen*/
   float x = ();
   float y = ();
   
   try
   {
    /*Touch event handling*/
    switch (()) 
    {
     /*Click on the screen*/
     case MotionEvent.ACTION_DOWN:
      picMove(x, y);
       break;
     /*Move position*/
     case MotionEvent.ACTION_MOVE:
      picMove(x, y);
       break;
     /*Leave the screen*/
     case MotionEvent.ACTION_UP:
      picMove(x, y); 
       break;
    }
   }catch(Exception e)
    {
     ();
    }
   return true;
  }
  /*How to move pictures*/
  private void picMove(float x, float y)
  {
   /*Default fine-tuning of the relative position of the picture and the pointer*/
   mX=x-(intWidth/2);
   mY=y-(intHeight/2);
   
   /*Related processing to prevent pictures from exceeding the screen*/
   /*Prevent the screen from going to the right and exceeding the screen*/
   if((mX+intWidth)>intScreenX)
   {
    mX = intScreenX-intWidth;
   }
   /*Prevent the screen from going left and exceeding the screen*/
   else if(mX<0)
   {
    mX = 0;
   }
   /*Prevent the screen from going downwards*/
   else if ((mY+intHeight)>intScreenY)
   {
    mY=intScreenY-intHeight;
   }
   /*Prevent the screen from going upwards*/
   else if (mY<0)
   {
    mY = 0;
   }
   /*View the image location through log*/
   ("jay", (mX)+","+(mY));
   /* Rearrange the position on Layout with the setLayoutParams method */
   
   (
    new 
    (intWidth,intHeight,(int) mX,(int)mY)
   );
  }
  
  /* Event handling of restore ImageView location */
  public void RestoreButton()
  {
   intDefaultX = ((intScreenX-intWidth)/2);
   intDefaultY = ((intScreenY-intHeight)/2);
   /*Toast restore position coordinate*/
   mMakeTextToast
   (
    "("+
    (intDefaultX)+
    ","+
    (intDefaultY)+")",true
   );
   
   /* Rearrange the position on Layout with the setLayoutParams method */
   
   (
    new 
    (intWidth,intHeight,intDefaultX,intDefaultY)
   );
  }
  
  /*Customize the method of sending messages*/
  public void mMakeTextToast(String str, boolean isLong)
  {
   if(isLong==true)
   {
    (, str, Toast.LENGTH_LONG).show();
   }
   else
   {
    (, str, Toast.LENGTH_SHORT).show();
   }
  }
}