Try this structure:
<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:layout_width="match_parent"
android:layout_height="match_parent">
<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.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="SPECIFIC HEIGHT HERE!"
android:fitsSystemWindows="true"
android:theme="ADD A STYLE HERE IF YOU WANT">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
>
<ImageView
android:id="@+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="YOUR SOURCE"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="YOUR MULTIPLIER"
/>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="YOUR POPUP THEME">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:tabGravity="YOUR TAB GRAVITY"
app:tabIndicatorColor="YOUR TAB INDICATOR COLOR"
app:tabMode="YOUR TAB MODE">
</android.support.design.widget.TabLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
The important attribute is the layout_gravity
of the TabLayout to be bottom.
For API 21 and lower I encountered the issue of the TabLayout disappearing. If you face the same problem, for the TabLayout (for APIs lower than 21) use this:
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:translationY="YOU HAVE TO EXPERIMENT WITH THIS ATTRIBUTE - (in dps)"
app:tabGravity="YOUR TAB GRAVITY"
app:tabIndicatorColor="YOUR TAB INDICATOR COLOR"
app:tabMode="YOUR TAB MODE"
>
You have to experiment with the translationY
attribute depending on the size you gave your app bar. You will enter a value in dps and in a few minutes you will nail it.
Hope it works for you as it worked for me!