Android Touch Screen test Instance code _android

The example of this article describes the Android touch screen test code, can realize the touch screen of the Click, move, leave and other events, for Android beginners have a good reference value.

The specific function code is as follows:

Package com.test;
Import android.app.Activity;
Import Android.os.Bundle;
Import Android.util.DisplayMetrics;
Import Android.util.Log;
Import android.view.MotionEvent;
Import Android.view.View;
Import Android.widget.AbsoluteLayout;
Import Android.widget.Button;
Import Android.widget.ImageView;
Import Android.widget.Toast;
  public class Touchactivity extends activity {/* DECLARE ImageView variable/private ImageView mImageView01;
  /* Declare related variables as a store picture wide, position using * * 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) {super.oncreate (savedinstancestate);
   
   Setcontentview (R.layout.main); 
   /* Get Screen Object * * displaymetrics DM = new Displaymetrics ();
   
   Getwindowmanager (). Getdefaultdisplay (). Getmetrics (DM);
   /* Get screen Resolution pixel * * Intscreenx = dm.widthpixels;
   
   Intscreeny = Dm.heightpixels;
   /* Set the picture's width/intwidth = 100;
   intheight = 100; /* ThroughFindviewbyid constructor creates ImageView object/mImageView01 = (ImageView) Findviewbyid (R.ID.MYIMAGEVIEW1);
   
   /* Assign the picture from drawable to ImageView to present/Mimageview01.setimageresource (R.drawable.baby);
   
   /* Initialize button position Center/Restorebutton (); /* When clicked ImageView, restore initial position/Mimageview01.setonclicklistener (new Button.onclicklistener () {@Override public vo
    ID OnClick (View v) {Restorebutton ();
  }
   });
   /* Overwrite Touch Event/public boolean ontouchevent (Motionevent event) {/* Get the position of the finger touch screen/float x = Event.getx ();
   
   Float y = event.gety (); try {/* Touch event handling/switch (Event.getaction ()) {/* Click on screen/Case MotionEvent.ACTION_DOWN:picM
       Ove (x, y);
     Break
       /* Mobile Position * * Case MotionEvent.ACTION_MOVE:picMove (x, y);
     Break 
       * * Leave screen/Case MotionEvent.ACTION_UP:picMove (x, y);
    Break
    }}catch (Exception e) {e.printstacktrace ();
  return true; /* The method of moving the picture * * private void PICMOve (float x, float y) {/* default trimmer picture with pointer relative position * * * mx=x-(INTWIDTH/2);
   
   my=y-(INTHEIGHT/2);
   /* Anti-screen RELATED processing * * * prevent screen to right over screen/if ((mx+intwidth) >intscreenx) {MX = Intscreenx-intwidth;
   /* Prevent screen to left over screen */else if (mx<0) {MX = 0;
   /* * Prevents the screen from being down over the screen/else if ((my+intheight) >intscreeny) {my=intscreeny-intheight;
   /* * Prevent the screen from up to over screen/else if (my<0) {my = 0;
   */* through Log to view picture position/LOG.I ("Jay", Float.tostring (MX) + "," +float.tostring (my)); /* with Setlayoutparams method, rearrange the position on the layout/mimageview01.setlayoutparams (New Absolutelayout.layoutparams (INTW
  Idth,intheight, (int) MX, (int) my);
   /* Restore event Handling at ImageView location/public void Restorebutton () {Intdefaultx = ((intscreenx-intwidth)/2);
   Intdefaulty = ((intscreeny-intheight)/2); /*toast Restore Position Coordinates * * Mmaketexttoast ("+ integer.tostring (INTDEFAULTX) +", "+ integer.tostring (intdefaul
   
   TY) + ")", true); /* to SetlayoutparaMs Method, rearranging the position on the layout/mimageview01.setlayoutparams (New Absolutelayout.layoutparams (intwidth,intheight,in
  tdefaultx,intdefaulty)); }/* Customize a method of sending a message * * public void Mmaketexttoast (String str, Boolean Islong) {if (islong==true) {Toast.mak
   EText (Touchactivity.this, str, toast.length_long). Show ();
   else {toast.maketext (touchactivity.this, str, toast.length_short). Show (); }
  }
}

Readers can also improve the response processing functions of various events on the basis of this instance, making them richer in functionality.