Button.setBackground(Drawable background) throws NoSuchMethodError

Question

I\'m implementing a simple method to add a Button to a LinearLayout programatically.

When I invoke the setBackground(Drawable background) metho

Answer 1

To create a homogeneous background for a View, you can create a drawable resource of type shape, and use that with the setBackgroundResource.

red_background.xml

Activity:

Button b = (Button)findViewById(R.id.myButton);
b.setBackgroundResource(R.drawable.red_background);

But this will look pretty bad, flat and out of place. If you want a colored button that looks like a button, than you can either design it yourself (rounded corners, stroke, gradient fill...) or a fast and dirty solution is to add a PorterDuff filter to the button's background:

Button b = (Button)findViewById(R.id.myButton);
PorterDuffColorFilter redFilter = new PorterDuffColorFilter(Color.RED, PorterDuff.Mode.MULTIPLY);
b.getBackground().setColorFilter(redFilter);