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Question

So, I have an activity with navigation view. By click on its item I change fragment in activity. All fragment have the same toolbar. But one have this toolbar and TabLayout to it. I would like to know what is better to declare toolbar once on activity like this

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

    <include layout="@layout/toolbar" />

    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/toolbar" />

</RelativeLayout>

or declare it in each fragment.

The disadvantage of the first method is default toolbar shadow. When I add tabs in fragment, shadow looks like

When I tried 2 solution. All my toolbar was with back icon instead drawer animated logo.

Thanks.

Answer 1

I had the exact same problem. This is how I solved it:

• Move the toolbars to the fragments like you suggested (so you won't have a shadow separating the two). This allows for a way more flexible way to implement (different) toolbars in your layouts too.

• Replace the Toolbar's navigation icon by a custom one like this:

   toolbar.setNavigationIcon(R.drawable.ic_action_menu); 

(I used the Android Asset Studio to easily create an icon with the preferred color)

• Now open the NavigationView with the new menu(home) icon. You can do this through the MainActivity (the one with the NavigationView). Create a public method in that Activity that opens the drawer:

   public void openDrawer(){ mDrawerLayout.openDrawer(Gravity.LEFT); } 

• Now call this method in the OnOptionsItemSelected in your fragments like this:

   @Override public boolean onOptionsItemSelected(MenuItem item) { // handle item selection switch (item.getItemId()) { case android.R.id.home: //Menu icon ((MainActivity)getActivity()).openDrawer(); return true; default: return super.onOptionsItemSelected(item); } } 

That's it. Of course the downside is that you must implement the Toolbar in each Fragment. However, this is the only way (that I know of) that enables you to have the Toolbar (+TabLayout) in a Fragment and still be able to control your NavigationView.

Answer 2

You can use AppBarLayout from design support library like:

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

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

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

and then you can change visibility of tablayout.

For more information about desing layout library : link