setBackground(): non-static method cannot be referenced from a static context

Question

I want to change the Background of a FrameLayout. This is the code I use right now:

FrameLayout.setBackground(getResources().getDrawable(R.drawable.background));

But this error occurs:

Non-static method 'setBackground(android.graphics.drawable.Drawable)' cannot be referenced from a static context.

What is wrong there?

Answer 1

FrameLayout is a class. When you call FrameLayout.setBackground() you are attempting to call a static method called setBackground() on the FrameLayout class itself. This error is telling you that such a static method does not exist.

What you really want to do is call the setBackground() method on a particular instance of a FrameLayout.

First you need to obtain a reference to your FrameLayout (generally through a call to findViewById(), then call setBackground() on that.