xml - Android App 50 percent width -

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i trying build little android app , need 2 linearlayout side side. (50/50)

how looks: http://i.stack.imgur.com/c9ycf.png

i try use: android:layout_width="0dp" android:layout_weight="1" didn't work.

this xml:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/part">  <linearlayout     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="9pt"     android:layout_alignparenttop="true"     android:layout_alignparentleft="true"     android:baselinealigned="true"     android:background="#ff7f7f7f"     android:id="@+id/head">      <textview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:textappearance="?android:attr/textappearancesmall"         android:text="123456789"         android:id="@+id/textview"         android:paddingstart="3pt"         android:paddingleft="3pt"         android:textcolor="#ffffffff"         android:singleline="false" /> </linearlayout>  <linearlayout     android:id="@+id/left"     android:orientation="vertical"     android:layout_width="0dp"     android:layout_weight="1"     android:layout_height="fill_parent"     android:layout_alignparentleft="true"     android:layout_alignparentbottom="true"     android:layout_below="@+id/head"     android:background="#ffff0100" > </linearlayout>  <linearlayout     android:id="@+id/right"     android:orientation="vertical"     android:layout_width="0dp"     android:layout_weight="1"     android:layout_height="fill_parent"     android:layout_alignparentbottom="true"     android:layout_alignparentright="true"     android:layout_below="@+id/head"     android:background="#fffcff00" />

how should look: http://i.stack.imgur.com/tup01.png

have 1 more linearlayout horizontal orientation below @+id/head linearlayout. set width match_parent. keep last 2 linearlayouts inside new linearlayout , have android:layout_weight=0.5 both. like:

<relativelayout>    <linearlayout> </linearlayout>     <linearlayout       ...       android:orientation:"horizontal"/>          <linearlayout             android:weight="0.5"             android:width="0dp"              ... />          </linearlayout>          <linearlayout             android:weight="0.5"             android:width="0dp"              ... />         </linearlayout>     </linearlayout> </relativelayout>

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