圆点指示器（布局）

selectshape

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <corners android:radius="30dp"/>
    <solid android:color="#ff0000"/>

</selector>

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noselectshape

<selector xmlns:android="http://schemas.android.com/apk/res/android">


    <corners android:radius="30dp"/>
    <solid android:color="#0000ff"/>
</selector>