Java-android changing the app name and icon

First of all, in your resource file put the icon you want to change the picture dragged into the Drawable-xx folder, and then you open androidmanifest.xml This configuration list file to find the application tag in this sentence android:icon= "@ Drawable/ic_launcher "Where ic_launcher this is the name of the picture you want to quote,
For example, you find a aa.jpg image under Drawable-xx, you can refer to android:icon= "@drawable/aa" in the manifest file. Here is the app icon.

or directly replace the Ic_launcher icon, a few folders are replaced, different resolutions

Drawable
drawable-hdpi
drawable-ldpi
drawable-mdpi
drawable-xhdpi

Note: Xiaomi phone to restart the system before you can see the replacement icon;

Java-android changing the app name and icon