Question

How to dynamically setting relative layout background?
My relative layout at the top,can not be set the id

Answer 1

Say you have a relative layout with the ID relativeLayout. You can set the background by using:

RelativeLayout rLayout = (RelativeLayout) findViewById(R.id.relativeLayout);
Resources res = getResources(); //resource handle
Drawable drawable = res.getDrawable(R.drawable.newImage); //new Image that was added to the res folder

rLayout.setBackgroundDrawable(drawable);