Get Height of LinearLayout or RelativeLayout in Android programmatically -

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i need length of linearlayout or relativelayout programmatically in android if have linearlayout follows 

<relativelayout         android:layout_width="match_parent"         android:layout_height="wrap_content" >

i need increase height of layout located in mid of screen taking screen height , increase or decrease height taking calculations on basis of screen height. there way of calculating height of layout height set wrap_content. tried height layout parameters gives me value of -1 or -2 not height in pixels or density pixels.

try following:

mylayoutref.post(new runnable() {     int height = mylayoutref.getheight; });

this runnable runs after layout has been drawn , laid out on screen, height returns real height , not 0


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