Hide AppBar when scrolling down

Question

I have an AppBar and a horizontal linearlayout (which includes an edit text and two imagebuttons) and other things in my layout. When user scrolls down,

Answer 1

You need to structure your layout like this:

<android.support.design.widget.CoordinatorLayout >
    <android.support.design.widget.AppBarLayout >
        <android.support.design.widget.CollapsingToolbarLayout >
            <ImageView />
            <android.support.v7.widget.Toolbar />
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>
    <!-- Your scrollable content here -->
</android.support.design.widget.CoordinatorLayout>

Complete tutorial at: http://blog.grafixartist.com/toolbar-animation-with-android-design-support-library/

Answer 2

In order to hide toolbar use the code below.

toolbar.animate().translationY(-toolbar.getBottom()).setInterpolator(new AccelerateInterpolator()).start();

Answer 3

I hope that this article will help you: https://guides.codepath.com/android/Handling-Scrolls-with-CoordinatorLayout

Try using CoordinatorLayout and CollapsingToolbar.

<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:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_scrollFlags="scroll|enterAlways">    
        </android.support.v7.widget.Toolbar>

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

Answer 4

check this out you need to set flag for it in CoordinatorLayout and CollapsingToolbar,

  <android.support.design.widget.CoordinatorLayout
         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.v4.widget.NestedScrollView
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             app:layout_behavior="@string/appbar_scrolling_view_behavior">

         <!-- Your scrolling content -->

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

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

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

         <android.support.design.widget.TabLayout
                 ...
                 app:layout_scrollFlags="scroll|enterAlways"/>

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

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

http://developer.android.com/reference/android/support/design/widget/AppBarLayout.html

Answer 5

In the Drawer.Layout add in android:fitsSystemWindows="true".

<android.support.v4.widget.DrawerLayout android:id="@+id/drawer_layout"
    .../...
    // add in
    android:fitsSystemWindows="true">

It's better to separate out your concerns. Using the sample provided by chrisbanes/cheesesquare, your layout would be better looking like this:

<android.support.v4.widget.DrawerLayout android:id="@+id/drawer_layout"
    .../...
    // add in
    android:fitsSystemWindows="true">

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

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

    <android.support.v7.widget.Toolbar 
        // Why are you using two themes?
        // android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>

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

Replace this:

    <LinearLayout .../...>
    <View .../...>
    </View>
    <LinearLayout .../...>
        <ImageButton
            .../...
            />
    </LinearLayout>
    <ScrollView .../...>
    <!--many views inside scrollview..... -->
    </ScrollView>
    </LinearLayout>

With

<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"/>

And then use the ViewPager to populate your list.

 ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
    if (viewPager != null) {
        setupViewPager(viewPager);
    }

private void setupViewPager(ViewPager viewPager) {
    Adapter adapter = new Adapter(getSupportFragmentManager());
    adapter.addFragment(new CheeseListFragment(), "Category 1");
    adapter.addFragment(new CheeseListFragment(), "Category 2");
    adapter.addFragment(new CheeseListFragment(), "Category 3");
    viewPager.setAdapter(adapter);
}

Then you can format this CheeseListFragment to add your image views individually.

It's also unnecessary to keep declaring your schema:

xmlns:app="http://schemas.android.com/apk/res-auto"

This is an indicator that you are copying and pasting code and not understanding it.

You should also be using a nestedScrollView without the view, and linear layout above it. Mind you, it's not clear what you are trying to acheive with that.

Answer 6

Try this code: Use layout_scrollFlags like below:

app:layout_scrollFlags="scroll|enterAlways"

and your XML file change like below:

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="MainActivity">

<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/toolbar"
        app:layout_scrollFlags="scroll|enterAlways"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay"/>

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

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

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

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

this is content_main XML file

<android.support.v4.widget.NestedScrollView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
app:layout_behavior="@string/appbar_scrolling_view_behavior">

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


</LinearLayout>

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