Help! HOW TO ADD ONLY TOAST NOTIFICATION?

[Requirements] 0. A working brain 1. A Computer 2. The apk file, obviously 3. dex/Apk decompiler with xml decoding support eg.(Apktool) 4. Text editor (Notepad++, Sublime Text, Atom, notepad) [Info] What exactly are we trying to do? *see image* Pretty much looks like that, but you may notice...