怎么在Android中实现一个仿微软系统加载动画效果？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
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(); } public void setRadius(float radius) { this.radius = radius; } 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(); } private void initCircle() { circles = new Circle[circleCount]; for (int i = 0; i < circleCount; i++) { circles[i] = new Circle(); circles[i].setCenter(center.x, center.y - roateRadius / 2 + circleRadius); circles[i].setRadius(circleRadius - circleRadius * i / 5); } //开始执行动画 startAnimation(); } private void startAnimation() { for (int i = 0; i < circleCount; i++) { final int index = i; ValueAnimator animator = ValueAnimator.ofFloat(0, 360); animator.setRepeatCount(ValueAnimator.INFINITE);//重复 animator.setDuration(2000); animator.setStartDelay(index * 100); //每一个随后的延迟时间 animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { rotates[index] = (float) animation.getAnimatedValue(); invalidate(); } }); animator.start(); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); for (int i = 0; i < circleCount; i++) { canvas.save(); canvas.rotate(rotates[i], center.x, center.y); circles[i].draw(canvas, paint); canvas.restore(); } }}3、布局文件中使用
<com.sjl.keeplive.track.MinSoftLoadingView android:layout_width="60dp" android:layout_height="60dp" android:layout_gravity="center"/>关于怎么在Android中实现一个仿微软系统加载动画效果问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注编程网行业资讯频道了解更多相关知识。
