<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    android:background="@android:color/transparent"    
    >

  <ImageView
            android:id="@+id/img_welcom"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="centerCrop"
            android:contentDescription="@string/app_name"
            android:src="@drawable/welcome" />
   

</RelativeLayout>
