二进制XML文件行＃7：您必须提供layout_width属性

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="https://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    android:background="@drawable/off_background">

<ImageView 
    android:id="@+id/bottom_layer" 
    android:src="@drawable/handle"/>

<ImageView
    android:id="@+id/upper_layer"
    android:src="@drawable/switch_v"/>

</FrameLayout>
<?xml version="1.0" encoding="utf-8"?>
<FrameLa