Android hollow circle and stacking effect implementation code

package .zidingyiview2;

import ;
import ;
import ;
import ;
import ;
import ;


public class MyView extends View {
 private Context mcontext;
 private Paint mpaint;

 public MyView(Context context) {
  super(context);
 }

 public MyView(Context context, AttributeSet attrs) {
  super(context, attrs);
 }

 public MyView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
   = context;
 }

 @Override
 protected void onDraw(Canvas canvas) {
  (canvas);
// Get the screen width and height  float wi = () / 2;
  float he = () / 2;
// Create the first brush  Paint pa = new Paint();
// Color  ();
// Show round edges  (true);
// Set up hollow rings  ();
// Set the ring width  (6);
  Paint pa2 = new Paint();
  ();
  (true);
  Paint pa3 = new Paint();
  ();
  (true);
// What circle to draw  (wi-85, he-85, 80, pa2);
  (wi, he, 100, pa);
  (wi+110, he+110, 120, pa3);
 }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 xmlns:andro
 xmlns:tools="/tools"
 android:
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 tools:context=".">

 <.
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"/>
</RelativeLayout>