Hi you can use this lib simply.

Support : Sony,Samsung,LG,HTC,Xiaomi,ASUS,ADW,APEX,NOVA,Huawei,ZUK,OPPO

ShortcutBadger

Add :

int badgeCount = 1;
ShortcutBadger.applyCount(context, badgeCount);  

Remove :

ShortcutBadger.applyCount(context, 0);