android 固定进度无限旋转的环形效果

效果图

Activity 中使用

val rotation: ObjectAnimator = ObjectAnimator.ofFloat(progressBar, "rotation", 0f, 360f)
rotation.duration = ·000 // 旋转持续时间为2秒
rotation.repeatCount = ObjectAnimator.INFINITE // 设置为无限循环
rotation.interpolator = LinearInterpolator() // 设置匀速插值器
rotation.start()

布局样式

<ProgressBar
    android:id="@+id/progressBar"
    android:background="@drawable/pb_circular_bg"
    android:progressDrawable="@drawable/pd_circular_progress"
    android:indeterminateOnly="false"
    android:indeterminate="false"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:max="100"
    android:progress="25"/>

背景样式 pb_circula_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:innerRadiusRatio="3"
    android:shape="ring"
    android:thicknessRatio="8"
    android:useLevel="false">
    <solid android:color="@color/theme_c_d9" />
</shape>

进度样式 pd_circular_progress.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:innerRadiusRatio="3"
    android:shape="ring"
    android:thicknessRatio="8"
    android:useLevel="true">
    <solid android:color="@color/colorPrimary" />
</shape>