canvas.drawArc()

package com.exercise.AndroidDraw;



import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Path;

import android.graphics.RectF;

import android.os.Bundle;

import android.view.View;



public class AndroidDrawActivity extends Activity {



	/** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(new MyView(this));

    }

    

    public class MyView extends View {



		public MyView(Context context) {

			super(context);

			// TODO Auto-generated constructor stub

		}



		@Override

		protected void onDraw(Canvas canvas) {

			// TODO Auto-generated method stub

			super.onDraw(canvas);



			

			float width = (float)getWidth();

			float height = (float)getHeight();

			float radius;

			

			if (width > height){

				radius = height/4;

			}else{

				radius = width/4;

			}

			

			Path path = new Path();

			path.addCircle(width/2, 

					height/2, radius, 

					Path.Direction.CW);

			

			Paint paint = new Paint();

			paint.setColor(Color.WHITE);

			paint.setStrokeWidth(5);	



			paint.setStyle(Paint.Style.FILL);

			float center_x, center_y;

			center_x = width/2;

			center_y = height/4;

			final RectF oval = new RectF();

			oval.set(center_x - radius, 

					center_y - radius, 

					center_x + radius, 

					center_y + radius);

			canvas.drawArc(oval, 90, 270, true, paint);

			

			paint.setStyle(Paint.Style.STROKE);

			center_x = width/2;

			center_y = height/2;

			oval.set(center_x - radius, 

					center_y - radius, 

					center_x + radius, 

					center_y + radius);

			canvas.drawArc(oval, 90, 270, true, paint);

			

			paint.setStyle(Paint.Style.STROKE);

			center_x = width/2;

			center_y = height * 3/4;

			oval.set(center_x - radius, 

					center_y - radius, 

					center_x + radius, 

					center_y + radius);

			canvas.drawArc(oval, 90, 270, false, paint);

			

		}



	}

}