Android.graphics.Canvas

import android.app.*;
import android.content.*;
import android.graphics.*;
import android.os.*;
import android.view.*;

public class CustomView extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MyView vw = new MyView(this);
        setContentView(vw);
    }

    protected class MyView extends View {
        public MyView(Context context) {
            super(context);
        }
        public void onDraw(Canvas canvas) {
            Paint Pnt = new Paint();
            Pnt.setColor(Color.BLUE);
            canvas.drawColor(Color.WHITE);
            canvas.drawCircle(100,100,80,Pnt);
        }
    }
}