drawshape.java

来自「Android从入门到精通」· Java 代码 · 共 37 行

package com.androidbook.Drawing;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;

public class DrawShape extends Drawing {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new ViewWithRedDot(this));
	}

	 private static class ViewWithRedDot extends View {

	       
	        public ViewWithRedDot(Context context) {
	            super(context);

	        }
	        
	        @Override protected void onDraw(Canvas canvas) {
	            canvas.drawColor(Color.BLACK);

	            Paint circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
	            circlePaint.setColor(Color.RED);
	            canvas.drawCircle(canvas.getWidth()/2, canvas.getHeight()/2, canvas.getWidth()/3, circlePaint);
	            
	        }
	    }

}