本文实例为大家分享了Android空心圆及层叠效果的具体代码，供大家参考，具体内容如下

package com.bwei.test.zidingyiview2;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;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); this.mcontext = context; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas);// 得到屏幕宽高 float wi = canvas.getWidth() / 2; float he = canvas.getHeight() / 2;// 创建第一个画笔 Paint pa = new Paint();// 上色 pa.setColor(Color.GREEN);// 显示圆边 pa.setAntiAlias(true);// 设置空心圆环 pa.setStyle(Paint.Style.STROKE);// 设置圆环宽度 pa.setStrokeWidth(6); Paint pa2 = new Paint(); pa2.setColor(Color.BLUE); pa2.setAntiAlias(true); Paint pa3 = new Paint(); pa3.setColor(Color.BLACK); pa3.setAntiAlias(true);// 画什么圆 canvas.drawCircle(wi-85, he-85, 80, pa2); canvas.drawCircle(wi, he, 100, pa); canvas.drawCircle(wi+110, he+110, 120, pa3); }}
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" 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="com.bwei.test.zidingyiview2.MainActivity"> <com.bwei.test.zidingyiview2.MyView android:layout_width="wrap_content" android:layout_height="wrap_content"/></RelativeLayout>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。