空心圓

<?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/red"/>-->

    <stroke
        android:width="@dimen/dp_2"
        android:
 
color="@color/colorAccent"/>

    <size
        android:width="@dimen/dp_18"
        android:height="@dimen/dp_18"/>
</shape>

圓角矩形

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 填充顏色 -->
    <solid android:
 
color="@color/bg_edit_white"/>

    <!-- 線的寬度，顏色 -->
    <!--<stroke-->
    <!--android:width="1dp"-->
    <!--android:color="@color/gray_97"/>-->

    <!-- 矩形的圓角半徑 -->
    <corners
        android:bottomLeftRadius="@dimen/dp_4"
        android:bottomRightRadius=
 
"@dimen/dp_4"
        android:topLeftRadius="@dimen/dp_4"
        android:topRightRadius="@dimen/dp_4"/>
</shape>

實心小紅點

<?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/red"/>
    <corners android:radius="45dp"/>

    <size
        android:width="@dimen/dp_4"
        android:height="@dimen/dp_4"
        />
</shape>