Android: how to make it no space between 2 button in a horizontal linearlayout

Question

I just found I cannot remove the space between 2 buttons even if I set the layout_marginRight and layout_marginLeft as below. But it make sense if

Answer 1

Try changing the color of the button, because the default interface of the button which is native to android is actually smaller than it's size, and it's center-fitted to make it look cool.

Change it's background to black or something and you'll see the real size of the button.

android:background="#000"