Android-shape圆形&转圈圈

圆形：

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval"
    android:useLevel="false">
    <solid android:color="@color/deep_gray" />
    <padding
        android:bottom="1dp"
        android:left="1dp"
        android:right="1dp"
        android:top="1dp" />
    <solid android:color="@color/backg_gray" />
    <size
        android:width="30dp"
        android:height="30dp" />
</shape>

效果图：

---

---

转圈圈：

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:toDegrees="360" >

    <shape
        android:innerRadiusRatio="3"
        android:shape="ring"
        android:thicknessRatio="10"
        android:useLevel="false" >
        <gradient
            android:centerColor="#FF6A6A"
            android:endColor="#FF0000"
            android:startColor="#FFFFFF"
            android:type="sweep" />
    </shape>

</rotate>

效果图, 会转圈圈：

注意：如果在控件中没有设置宽和高，例如：控件设置了wrap_content，就需要在shape中设置宽和高：

<size
        android:width="30dp"
        android:height="30dp" />

完整代码：

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:toDegrees="360" >

    <shape
        android:innerRadiusRatio="3"
        android:shape="ring"
        android:thicknessRatio="10"
        android:useLevel="false" >
        <gradient
            android:centerColor="@color/backg_gray"
            android:endColor="@color/deep_gray"
            android:startColor="#FFFFFF"
            android:type="sweep" />

        <size
            android:width="30dp"
            android:height="30dp" />

    </shape>


</rotate>