Incorrect factory position in fragment at startup

Question

I have one fragment activity. the fragment has a coordinator layout, which is a direct child of other representations.

Action layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar_layout" />

    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

Fragment Layout

<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.github.aakira.expandablelayout.ExpandableLinearLayout
        android:id="@+id/statistic_expand_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/toolbar"
        android:background="@color/colorPrimary"
        android:orientation="vertical"
        app:ael_duration="150"
        app:ael_interpolator="accelerateDecelerate">

        <com.github.mikephil.charting.charts.BarChart
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/overall_statistic_bar_chart"
            android:layout_width="match_parent"
            android:layout_height="@dimen/statistic_small"/>

        <TextView
            style="@style/SmallTextTheme"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="@dimen/spacing_small"
            android:gravity="center"
            android:text="@string/overall_statistic"
            android:textColor="@color/colorTextPrimary"/>

    </com.github.aakira.expandablelayout.ExpandableLinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/statistic_expand_layout"
        android:scrollbars="vertical"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="@dimen/spacing_tiny"
        android:layout_below="@id/statistic_expand_layout"
        android:background="@drawable/shadow_updown"/>

</RelativeLayout>

<android.support.design.widget.FloatingActionButton
    android:id="@+id/activity_main_fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/spacing_standard"
    android:src="@drawable/ic_add"
    app:layout_anchor="@id/recycler_view"
    app:layout_anchorGravity="bottom|end"/>

</android.support.design.widget.CoordinatorLayout>

When I start working with this fragment, the position fab is incorrect

but when I press any button or looking fab, it goes to the right position in the lower right corner. When I put this layout directly into action, the fab position is always correct. Can someone help me figure out what the problem is?

Answer 1

fab . .

: AppBarLayout CoordinatorLayout, , :

    <android.support.design.widget.CoordinatorLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="match_parent"
         android:layout_height="match_parent">

     <android.support.v4.widget.NestedScrollView
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             app:layout_behavior="@string/appbar_scrolling_view_behavior">

         <!-- Your scrolling content -->

     </android.support.v4.widget.NestedScrollView>

     <android.support.design.widget.AppBarLayout
             android:layout_height="wrap_content"
             android:layout_width="match_parent">

         <android.support.v7.widget.Toolbar
                 ...
                 app:layout_scrollFlags="scroll|enterAlways"/>

         <android.support.design.widget.TabLayout
                 ...
                 app:layout_scrollFlags="scroll|enterAlways"/>

     </android.support.design.widget.AppBarLayout>

 </android.support.design.widget.CoordinatorLayout>

, RelativeLayout . CoordinatorLayout Activity, AppBarLayout Toolbar CoordinatorLayout. CoordinatorLayout RelativeLayout, AppBarLayout.

. . : app:layout_behavior="@string/appbar_scrolling_view_behavior" AppBarLayout.

, .