app/src/main/res/drawable/msg_bg_left.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape = "rectangle">
<corners
android:radius = "10dp"
android:topLeftRadius = "0dp"/>
<solid android:color = "@color/colorMsgLeft"/>
</shape>