android - How to put layout inside another layout? -

I want to put one layout in another layout but when I do this, it will be on NullPointerException relLayout.addView (squareLayout); (Int i = 0; i <6; i ++) for line

  {for (int j = 0; j & lt; 7; j ++ ) {Find Relative Layout Relativity = (Relative Layout) VVID (Relays [ii] [J]); RelLayout.removeAllViews (); Find Relative Layout Square Layout = (Relative Layout) ViviIID (RID Square); RelLayout.addView (squareLayout); }}    Please tell me what should I do?  rellayout   
 
   relAllViews ()  while reaching the method Code> is not zero so either the  findViewById ()  or any other thread is set to empty for example  relLayout .   

 


  







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