安卓学习：利用动画配置文件实现多个补间动画循环播放

效果

代码：

activity_mian.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    android:padding="10dp"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/lvBell"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_marginBottom="20dp"
        android:src="@drawable/bk031"/>

</LinearLayout>

创建动画配置文件animator

animator.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <!--    旋转动画-->
        <rotate
            android:duration="3000"
            android:fromDegrees="0"
            android:toDegrees="360"
            android:pivotX="50%"
            android:pivotY="50%"
            android:repeatCount="-1"
            android:repeatMode="reverse"/>
    <!--    透明度动画-->
        <alpha
            android:duration="3000"
            android:fromAlpha="1"
            android:repeatCount="-1"
            android:repeatMode="reverse"
            android:toAlpha="0" />
    <!--    平移动画-->
        <translate
            android:duration="3000"
            android:fromXDelta="80%"
            android:fromYDelta="0%"
            android:repeatCount="-1"
            android:repeatMode="reverse"
            android:toXDelta="-200%"
            android:toYDelta="0%" />
    <!--    缩放动画-->
        <scale
            android:duration="3000"
            android:fromXScale="1"
            android:fromYScale="1"
            android:pivotX="50%"
            android:pivotY="50%"
            android:repeatCount="-1"
            android:repeatMode="reverse"
            android:toXScale="0"
            android:toYScale="0" />
    </set>

主界面类 MainActivity.java