Android launcher icon still showing default in Android oreo [duplicate]

Answer 1

Add your app icon in a drawable folder and change menifest code. you will get success.

Answer 2

You Need Put Round Icon for 8.1

 <application
    android:name=".aaa"
    android:allowBackup="true"
    android:roundIcon="@mipmap/ic_launcher"
    android:icon="@mipmap/ic_launcher"
    android:label="aaa"
    android:theme="@style/AppTheme">