When You are adding default BottomSheet to flutter application there are certain difficulties you have to overcome. One is the heigh the sheet.

We cannot change the height of the sheet and the max height will be half of the screen. But we can customize the code of the bottom sheet to give full height.

First Create a new Dart File Called BottomSheetCustom and Copy the default bottom sheet code and Paste there. Then find the method getConstraintsForChild. In there we can change the Constrain values as below.