Immutable bitmap passed to Canvas constructor

exception
Immutable bitmap passed to Canvas constructor
是因爲在進行對resource自選的操作出現錯誤
BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher)；
應該是
BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher).copy(Bitmap.Config.ARGB_8888, true);