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>