How to strench child elements in LinearLayout

I have LinearLayout, and I am trying to make the child elements to be 100%. so far I have this

[E1] [E2] [E3] 

while I want them to be

[E1]  
[E2]  
[E3] 

what properties开发者_Go百科 should I change?? I tried several such as layout_width

Set LinearLayout orientation to vertical

android:orientation="vertical"

And make all elements fill parent.

You should change orientation property of your LinearLayout to vertical