Hi everyone!

I want a layout with alpha=0.5 to cover another layout with a button. However I am still able to click the button of the covered layout, although the other layout is in the front.

Why??


This is the xml layout:

Code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_weight="6" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="search_main"
            android:text="search" /> <!-- I can click this button -->
    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/layoutLoader"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:alpha="0.6"
        android:background="#000000" >

        <ProgressBar
            android:id="@+id/progressBarBusqueda"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_marginBottom="10dp"
            android:layout_marginTop="10dp" >
        </ProgressBar>
    </RelativeLayout>

</RelativeLayout>
thank you very much!!