programmatically-set-weight-for-button in android

You are create when Dynamically button then set weight without use xml.

then use it this code

LinearLayout.LayoutParams size = new LinearLayout.LayoutParams

(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
size.weight = 1; 

Button btn = new Button(MainActivity.this);  

btn.setLayoutParams(size);

You have to use TableLayout.LayoutParams

TextView tv = new TextView(v.getContext());
tv.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, 

LayoutParams.WRAP_CONTENT, 1f));