GridView和Gallery嵌套在FrameLayout,GridView的getView()里面的position一直为0

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直接上代码:
这是我的activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
    >
 <TextView
        android:id="@+id/main_head_title"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:text="我擦"
        />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/main_head_title"
        >
        <FrameLayout
            android:id="@+id/fragment_ss"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </LinearLayout>
</RelativeLayout>

Fragment里面的xml

<LinearLayout 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="@color/darkgrey"
              android:orientation="vertical">

    <com.example.dell.gridviewtest.CustomGallery
        android:id="@+id/id_gallery"
        android:layout_width="match_parent"
        android:layout_height="110dp"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal"
        android:spacing="30dp"/>

    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:cacheColorHint="#0000"
        android:horizontalSpacing="1px"
        android:listSelector="#0000"
        android:numColumns="3"
        android:scrollbars="none"
        android:verticalSpacing="1px"/>

</LinearLayout>

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