有没有办法隐藏Android软键盘中的一些键？

I am trying to get away from creating a custom keyboard. I was wondering if there was a way to hide a key in the default Android Soft Keyboard. For example, I have an EditText field that requires unsigned decimal numbers. But whenever the keyboard pops up, the "-" sign always shows and obviously, it is disabled. I would like to get rid of this "-" sign.I am trying to get away from creating a custom