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

Actually, that design seems to be wrong.Why? let me explain that to you.

Except those xmlns:android="http://schemas.android.com/apk/res/android" which it wasn't necessary or using: android:layout_alignParentTop="true" in the LinearLayout or using that ScrollView under the contents or etc, seems like you don't have any idea what's going on.(no problem).

Note: the most important thing was, adding:

app:layout_behavior="@string/appbar_scrolling_view_behavior" which also mentioned here:

http://guides.codepath.com/android/Handling-Scrolls-with-CoordinatorLayout

And this flag should hide that section:(exitUntilCollapsed)

app:layout_scrollFlags="scroll|exitUntilCollapsed"

exitUntilCollapsed: When the scroll flag is set, scrolling down will normally cause the entire content to move.

So finally: http://i.stack.imgur.com/qf1So.gif

Hope this is what you were looking for, if it wasn't please edit your question and add some screenshots.

Feel free to change the flags or add a new to achieve what you exactly need.

---

UPDATE:

If you want to hide that Toolbar(red section) after collapsing, just use this in the CollapsingToolbarLayout:

app:layout_scrollFlags="scroll|snap"

Finally, you will get the same result(something like googleplay design).

Codes:

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/main_content"
        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 Scrollable contents should be here - such as,
            ViewPager or etc -->

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:scrollbarSize="15sp"
                android:text="You Contents" />

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

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsingtoolbarly"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                app:contentScrim="?attr/colorPrimary"
                app:layout_scrollFlags="scroll|snap">

                <android.support.v7.widget.Toolbar
                    android:id="@+id/my_toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    android:elevation="4dp"
                    android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

                <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="190dp"
                    android:minHeight="190dp"
                    android:scaleType="fitXY"
                    android:src="@drawable/header"
                    app:layout_collapseMode="parallax" />


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

            <LinearLayout
                android:id="@+id/mylin"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <View
                    android:layout_width="fill_parent"
                    android:layout_height="30dp" />

                <LinearLayout
                    android:id="@+id/topLayout"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal">

                    <ImageButton
                        android:id="@+id/btn_sil"
                        android:layout_width="45dp"
                        android:layout_height="45dp"
                        android:background="@drawable/ic_arrow_drop_up_black_24dp"
                        android:gravity="center"
                        android:paddingBottom="15dp"
                        android:paddingLeft="10dp"
                        android:paddingRight="10dp"
                        android:paddingTop="0dp" />

                    <EditText
                        android:id="@+id/et_word"
                        android:layout_width="fill_parent"
                        android:layout_height="wrap_content"
                        android:background="@android:color/transparent"
                        android:ems="12"
                        android:gravity="center" />

                    <ImageButton
                        android:id="@+id/btn_getir"
                        android:layout_width="45dp"
                        android:layout_height="45dp"
                        android:background="@drawable/ic_arrow_drop_up_black_24dp"
                        android:gravity="center"
                        android:paddingBottom="15dp"
                        android:paddingLeft="10dp"
                        android:paddingRight="10dp"
                        android:paddingTop="0dp" />

                </LinearLayout>

            </LinearLayout>

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


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

    <!-- And finally, NavigationView -->

    <!-- <android.support.design.widget.NavigationView
          android:id="@+id/nav_view"
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          app:headerLayout="@layout/app_header"
          app:insetForeground="@color/app_color_primary_dark"
          app:menu="@menu/navigation_menu" /> -->

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

Results: after collapsing, the searchedittext won't hide:

UPDATE: New way :)

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

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

        <LinearLayout
            android:id="@+id/mylin"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <View
                android:layout_width="fill_parent"
                android:layout_height="30dp" />

            <LinearLayout
                android:id="@+id/topLayout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <ImageButton
                    android:id="@+id/btn_sil"
                    android:layout_width="45dp"
                    android:layout_height="45dp"
                    android:background="@drawable/ic_arrow_drop_up_black_24dp"
                    android:gravity="center"
                    android:paddingBottom="15dp"
                    android:paddingLeft="10dp"
                    android:paddingRight="10dp"
                    android:paddingTop="0dp" />

                <EditText
                    android:id="@+id/et_word"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:background="@android:color/transparent"
                    android:ems="12"
                    android:gravity="center" />

                <ImageButton
                    android:id="@+id/btn_getir"
                    android:layout_width="45dp"
                    android:layout_height="45dp"
                    android:background="@drawable/ic_arrow_drop_up_black_24dp"
                    android:gravity="center"
                    android:paddingBottom="15dp"
                    android:paddingLeft="10dp"
                    android:paddingRight="10dp"
                    android:paddingTop="0dp" />

            </LinearLayout>

        </LinearLayout>

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

            <!-- Your Scrollable contents should be here - such as,
            ViewPager or etc -->

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:scrollbarSize="15sp"
                android:text="You Contents" />

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

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.v7.widget.Toolbar
                android:id="@+id/my_toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:elevation="4dp"
                app:layout_scrollFlags="scroll|enterAlways"
                android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

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


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

    <!-- And finally, NavigationView -->

    <!-- <android.support.design.widget.NavigationView
          android:id="@+id/nav_view"
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          app:headerLayout="@layout/app_header"
          app:insetForeground="@color/app_color_primary_dark"
          app:menu="@menu/navigation_menu" /> -->

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

Results: