how to change size of button dynamic in android

Question

I try setWidth() and setheight() method but it not work

Answer 1

I found this to be the best solution because it also allows the button to be repositioned at the same time by simply changing its margin:

int buttonWidth = (int) (screenWidth / 3.0);
RelativeLayout.LayoutParams params = (LayoutParams) myButton.getLayoutParams();
params.width = buttonWidth;
params.leftMargin = buttonWidth;
myButton.setLayoutParams(params);