[移动开发]Android开发之canvas画矩形和圆

主要代码:

package com.example.myapplication;

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

public  class MyView extends View{

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

    protected void onDraw(Canvas canvas){

        Paint paint=new Paint();
        paint.setColor(Color.BLUE);
        paint.setARGB(150,0,100,200);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(10);
        //画一个空心的矩形
        canvas.drawRect(100,300,300,500,paint);
        //画一个实心圆
        paint.setStyle(Paint.Style.FILL);
        canvas.drawCircle(500,500,150,paint);
        super.onDraw(canvas);
    }

}