Inflating AppBarLayout with Toolbar + TabLayout

Question

I currently have a DrawerLayout in my main.xml. There\'s a Toolbar wrapped in an AppBarLayout, and then a simple LinearLayout to swap out fragments.

One of the fragment

Answer 1

You can simply add TabLayout programmatically from Fragment in wich you need TabLayout

tabLayout = (TabLayout) inflater.inflate(R.layout.tablay, null);
appBarLayout = (AppBarLayout) getActivity().findViewById(R.id.appbar);
appBarLayout.addView(tabLayout, new LinearLayoutCompat.LayoutParams(
    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));

and remove TabLayout from AppBar in onDetach()

@Override
public void onDetach() {
    appBarLayout.removeView(tabLayout);
    super.onDetach();
}

Answer 2

To fix my problem I ended up putting the Toolbar, TabLayout, and ViewPager all in my MainActivity.

main_activity.xml:

<android.support.v4.widget.DrawerLayout 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/drawerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/rootLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

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

            <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:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />

            <android.support.design.widget.TabLayout
                android:id="@+id/tabLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:tabMode="fixed"
                app:tabGravity="fill"
                app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>

            <android.support.v4.view.ViewPager
                android:id="@+id/viewpager"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/white" />
        </android.support.design.widget.AppBarLayout>

        <RelativeLayout
            android:id="@+id/flContent"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

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

    <android.support.design.widget.NavigationView
        android:id="@+id/navigation"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/nav_header"
        app:itemIconTint="#333"
        app:itemTextColor="#333"
        app:menu="@menu/navigation_drawer_items" />

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

Then, in all of my fragments, I set the visibility for the TabLayout and the ViewPager programmatically in onCreateView:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        TabLayout tabLayout = (TabLayout) getActivity().findViewById(R.id.tabLayout);
        tabLayout.setVisibility(View.GONE);
        ViewPager mViewPager = (ViewPager) getActivity().findViewById(R.id.viewpager);
        mViewPager.setVisibility(View.GONE);

        return inflater.inflate(R.layout.fragment_layout, container, false);
}

Of course, in the fragment with tabs, you would want to set the visibility to View.VISIBLE instead of View.GONE.

Answer 3

The Artem_lens approach worked for me with some modifications.

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    ...

    mTabLayout = (TabLayout) inflater.inflate(
            R.layout.partial_tab_layout,
            container,
            false);
    mAppBarLayout = (AppBarLayout) getActivity().findViewById(R.id.app_bar);
    mAppBarLayout.addView(mTabLayout,
            new LinearLayoutCompat.LayoutParams(
                    ViewGroup.LayoutParams.MATCH_PARENT,
                    ViewGroup.LayoutParams.WRAP_CONTENT));

    ...
}

And removing the view at onDestroyView()

@Override
public void onDestroyView() {
    mAppBarLayout.removeView(mTabLayout);
    super.onDestroyView();
}

Answer 4

I modified the solution given by bleeding182 and got it to work for AppBarLayout as well (to resolve the problem pointed out by bopa).

@Override
public void onAttach(Context context) {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        getActivity().findViewById(R.id.appbar).setElevation(0);
    }
    super.onAttach(context);

}

@Override
public void onDetach() {
    super.onDetach();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        getActivity().findViewById(R.id.appbar).setElevation(R.dimen.toolbar_elevation);
    }
}

What I did was replace the call to getSupportActionBar() by giving an ID to my AppBarLayout and then calling findViewById() on it and then calling setElevation on its result. Tested on API 23.

Answer 5

The solution is simple in the XML. Just add the following code to your AppBarLayout: app:elevation="0dp". So the AppBarLayout should look like this:

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:elevation="0dp"
    android:theme="@style/AppTheme.AppBarOverlay">

Answer 6

You are able to have separate toolbar for each fragment. Its possible to set fragments toolbar as activity actionbar. Example code:

Toolbar toolbar = (Toolbar) v.findViewById(R.id.toolbar);
 ((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);

It should be possible to have titles, icons and other stuff as well. With it you can mimic shadow on pre lollipop devices, no matter what you have on them.