Remove background drawable programmatically in Android

Try this

RelativeLayout relative = (RelativeLayout) findViewById(R.id.widget29);
relative.setBackgroundResource(0);

Check the setBackground functions in the RelativeLayout documentation

setBackgroundResource(0) is the best option. From the documentation:

Set the background to a given resource. The resource should refer to a Drawable object or 0 to remove the background.

It works everywhere, because it's since API 1.

setBackground was added much later, in API 16, so it will not work if your minSdkVersion is lower than 16.

This helped me remove background color, hope it helps someone. setBackgroundColor(Color.TRANSPARENT)

Try this code:

imgView.setImageResource(android.R.color.transparent); 

also this one works:

imgView.setImageResource(0); 

but be careful this one doesn't work:

imgView.setImageResource(null); 

I try this code in android 4+:

view.setBackgroundDrawable(0);