LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
layout.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener(){
    @SuppressWarnings("deprecation")
　　@Override 
　　public void onGlobalLayout() {            
　　　　layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);            
　　　　int width = layout.getMeasuredWidth();
       int height = layout.getMeasuredHeight();
   }  
});