android - Wrap_content doesn't work on RelativeLayout : Action bar custom View -

i have created custom layout action bar : add code on activity :

layoutinflater inflater = (layoutinflater)getsystemservice (context.layout_inflater_service); view actionbarview = inflater.inflate (r.layout.main_actionbar, null);   getsupportactionbar ().setcustomview (actionbarview); 

and main_actionbar.xml layout :

<?xml version="1.0" encoding="utf-8"?> <relativelayout      xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:style="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@color/white" >      <relativelayout         android:id="@+id/lefticons"         android:layout_width="wrap_content"         android:layout_height="match_parent"         android:layout_toleftof="@+id/empty"         android:paddingtop="4dp"         android:paddingbottom="4dp"         android:background="@drawable/uiclickable_gray_states"         android:layout_alignparentleft="true" >          <imageview             android:id="@+id/back"             android:layout_width="wrap_content"             android:layout_height="match_parent"             android:gravity="center_vertical"             android:layout_marginright="5dp"             android:src="@drawable/icon_back" />          <!-- problem here -->         <imageview             android:id="@+id/thumbnail"             android:layout_width="wrap_content"             android:layout_height="match_parent"             android:layout_torightof="@+id/back"             android:paddingtop="5dp"             android:paddingbottom="5dp"             android:src="@drawable/bg"             android:scaletype="fitxy"             android:adjustviewbounds="true" />      </relativelayout>      <view          android:id="@+id/empty"         android:layout_width="100dp"         android:layout_height="match_parent"         android:background="@color/black_transparent"         android:layout_alignparentright="true" />  </relativelayout> 

my problem @+id/thumbnail have it's height match_parent , have it's width equals height. means : height == match_parent , width == height, can have square image.

it appears cannot done xml, created (with of tutorials on net) subclass of imageview , did without positive results :

@override protected void onmeasure (int widthmeasurespec, int heightmeasurespec) {     //int width = measurewidth (widthmeasurespec);     int height = measureheight (heightmeasurespec);     setmeasureddimension (height, height); }  private int measureheight (int measurespecheight) {     int result;     int specmode = measurespec.getmode (measurespecheight);     int specsize = measurespec.getsize (measurespecheight);      if (specmode == measurespec.exactly) {         // told how big         result = specsize;     } else if (specmode == measurespec.at_most) {         // child can large wants specified size.         result = specsize;     } else {         // measure text  (beware: ascent negative number)         result = canvassize;     }      return  (result + 2); } 

am doing wrong there ? thank you.