Android实现仿微软系统加载动画效果

这篇文章主要介绍了Android实现仿微软系统加载动画效果的方法，帮助大家更好的理解和学习使用Android，感兴趣的朋友可以了解下

效果图：

实现步骤：

初始化五个圆球分别设置中心点,方便画圆
利用ValueAnimator的值变化来获取旋转角度
onDraw来分别画每个圆

具体代码实现:

1、创建Circle对象

 package com.sjl.keeplive.track; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PointF; public class Circle { private PointF center; private float radius; public Circle() { center = new PointF(); } /** * 设置圆球半径 */ public void setRadius(float radius) { this.radius = radius; } /** * 设置中心点 * * @param x * @param y */ public void setCenter(float x, float y) { center.set(x, y); } public void draw(Canvas canvas, Paint paint) { canvas.drawCircle(center.x,center.y,radius,paint); } }

2、自定义MinSoftLoadingView实现代码

 package com.sjl.keeplive.track; import android.animation.ValueAnimator; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PointF; import android.support.annotation.Nullable; import android.util.AttributeSet; import android.view.View; public class MinSoftLoadingView extends View { private int circleCount = 5; private Circle[] circles; private Paint paint; private int width; private int height; private PointF center; private float circleRadius; private float[] rotates; private float roateRadius; public MinSoftLoadingView(Context context) { this(context, null); } public MinSoftLoadingView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public MinSoftLoadingView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); paint = new Paint(); paint.setAntiAlias(true); paint.setColor(Color.WHITE); //每个点旋转的角度 rotates = new float[circleCount]; } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); width = getWidth(); height = getHeight(); center = new PointF(width / 2.0f, height / 2.0f); //旋转扫描半径 roateRadius = Math.min(width, height); //圆球最大的那个半径 circleRadius = roateRadius / 10.0f; initCircle(); } /** * 初始化5个圆球 */ private void initCircle() { circles = new Circle[circleCount]; for (int i = 0; i