幾個framelayout 的可以實現不重疊

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
     >

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1" 
        android:background="@drawable/cha4_icon">
    </FrameLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
          android:layout_weight="1"
          android:background="@drawable/cha4_icon">
    </FrameLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
          android:layout_weight="1"
          android:background="@drawable/cha4_icon">
    </FrameLayout>

   

   

</LinearLayout>