frozzyk frozzyk - 3 months ago 38
Android Question

Toobar drops shadow on TabLayout

everybody! I have a fragment in FrameLayout container within activity, which has Navigation Drawer. Fragment has TabLayout. And the problem is, as you can see, that
activity's toolbar drops shadow on fragment's TabLayout. I dont want to place TabLayout in activity's AppBar layout because I won't have access to it from fragment and, moreover, I don't need that TabLayout anywhere else.

Screenshot

This is my

activity_main.xml


<?xml version="1.0" encoding="utf-8"?>




<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />

<android.support.design.widget.NavigationView
android:id="@+id/mainNavigationView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />




And this is
app_bar_main.xml


<?xml version="1.0" encoding="utf-8"?>




<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

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

<android.support.v7.widget.Toolbar
android:id="@+id/loginToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|snap"
app:popupTheme="@style/AppTheme.PopupOverlay" />

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

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




This is
fragment_by_day_schedule.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical">

<android.support.design.widget.TabLayout
android:id="@+id/byDayTabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabBackground="?attr/colorPrimary"
app:tabMode="scrollable" />

<android.support.v4.view.ViewPager
android:id="@+id/byDayViewPager"
android:layout_width="match_parent"
android:layout_height="match_parent" />

</LinearLayout>


I also want the Toolbar to hide when I scroll up list in fragment within ViewPager

Do you have any ideas how can I achive that?

Answer

Use this. Works on my projects.

ViewCompat.setElevation(mAppBarLayout, 0);

And your second question how to hide your toolbar? Change your parent layout linearlayout to layout.

<android.support.design.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

        <android.support.v7.widget.Toolbar
            android:id="@+id/loginToolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways|snap"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

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

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

After this you have to tell android when toolbar should be hide. You should tell which view can be scroll. You have add this app:layout_behavior="@string/appbar_scrolling_view_behavior" to in your ViewPager.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical">

 <android.support.design.widget.TabLayout
     android:id="@+id/byDayTabLayout"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     app:tabBackground="?attr/colorPrimary"
     app:tabMode="scrollable" />

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