how to set setLayoutParams for linear layout elements

Question

How to set setLayoutParams() for LinearLayout elements. in MainActivity.java. I wrote the following code for set Layout params and

Answer 1

imageview1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, 50));  
textview1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, 50));
listview01.setLayoutParams(new
       LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));