sheishuoAPP/uikit/res/drawable/nim_message_item_round_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/color_grey_eaeaea" />
    <corners android:topLeftRadius="15dp"
             android:topRightRadius="15dp"
             android:bottomRightRadius="15dp"
             android:bottomLeftRadius="15dp"/>
</shape>