Android 图片文字叠加设置

<RelativeLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content" >        <ImageView            android:id="@+id/gift_exchanged_item_Photo"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:scaleType="fitCenter"            android:contentDescription="@string/gift_image"            android:src="@drawable/gift1" />        <TextView            android:id="@+id/gift_exchanged_item_exchangecode"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignLeft="@id/gift_exchanged_item_Photo"            android:layout_alignTop="@id/gift_exchanged_item_Photo"            android:textColor="#fff" />        <ImageView            android:id="@+id/gift_exchanged_item_isused"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignBottom="@id/gift_exchanged_item_Photo"            android:layout_alignRight="@id/gift_exchanged_item_Photo"            android:contentDescription="@string/gift_image"            android:src="@drawable/consumed" />    </RelativeLayout>