Floating Action Button not showing fully inside a fragment

Question

I am using FAB button along with RecyclerView in a Fragment. This Fragment is an instance of a TabViewPager. I am having a issue with the FAB button. I have placed the RecyclerView and the fab button inside a FrameLayout, where the FAB buttton is positioned bottom right. Now the problem that I am facing is the FAB button is not fully visible. Its half of the portion is hidden as shown in the screenshot below. Can any one help me to solve this issue. Thanks in advance.

Note: The FAB is aligning properly once it is scrolled. The problem arises only if it is ideal (before scrolling done).

fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="10dp"
        app:backgroundTint="@color/red"
        android:src="@drawable/ic_done"/>
</FrameLayout>

tabviewpagerlayout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout        xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <android.support.design.widget.AppBarLayout
        android:id="@+id/appBarLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">


        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:layout_scrollFlags="scroll|enterAlways" />


        <android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

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

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

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

Answer 1

It's not an acceptable solution to have to show/hide the FAB whatever tab is selected. I've tried every layout combination, but moving the FAB to the activity layout was the only solution that worked. But what if you need the button only in one tab? It's the only way that works now, but I'm expecting an update of the design library since this version is too buggy. Anyway, the bottom line is that the FAB must be a direct descendant to the CoordinatorLayout, so it doesn't get pushed down by the collapsing Toolbar...