hcp-pad/tuichat/src/main/res/drawable/chat_bubble_self_cavity_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <stroke
        android:width="@dimen/chat_message_bg_stoke_width"
        android:color="@color/color_FF4A76FF" />

    <solid android:color="@color/color_FF4A76FF" />

    <corners
        android:radius="@dimen/divider_20px"
        android:topRightRadius="@dimen/divider_20px" />

    <padding
        android:bottom="@dimen/divider_24px"
        android:left="@dimen/divider_24px"
        android:right="@dimen/divider_24px"
        android:top="@dimen/divider_24px" />
</shape>