动画化Android Ring Shape的后掠角 [英] Animate Android Ring Shape's sweep angle

问题描述

尝试对Android Ring Shape进行动画处理，以产生类似于所示图像序列的效果.

Attempting to animate the Android Ring Shape to produce an effect similiar to the shown sequence of images.

我发现了Ring的Shape Drawable类型.

I have found the Shape Drawable type of Ring.

<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="ring"
android:innerRadius="75dp"
android:thickness="25dp"
android:useLevel="false">

一起使用ArcShape(startAngle，sweepAngle)方法.

Along with the ArcShape(startAngle, sweepAngle) method.

ShapeDrawable shape = new ShapeDrawable(new ArcShape(0, 360));     
shape.setIntrinsicHeight(100);
shape.setIntrinsicWidth(100);
shape.getPaint().setColor(Color.BLACK);

但是，由于找不到可绘制形状的后掠角属性或无法为ArcShape创建内半径而出现问题.

However, the problems arise from being unable to find the drawable shape's sweep angle property or the ability to create an inner radius for ArcShape.

我正在尝试制作平滑的动画.

I am attempting to produce a smooth animation.

推荐答案

有用的材料:使用PorterDuff清除模式，可以移除"内部，留下甜甜圈形状.然后，您可以通过扩展Animation类进行重绘来使用弧的后掠角.

Using PorterDuff Clear mode the inner can be "removed", leaving a doughnut shape. You can then use the Arc's sweep angle by redrawing through extending the Animation class.

这篇关于动画化Android Ring Shape的后掠角的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！