Touch and Drag to Erase Image in Android | Erase Android Bitmap parts | Android Studio Tutorial

Hi great tutorial,
But I have one issue please help me with that
The issue is,

First i draw a path on canvas using touch event, after that i want to erase that path on drawing over that

thanks a lot man. you've really helped me

How to change Stroke width On seek bar.. Can you solve it..?

can you send me source code of it....good job