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.

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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:

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

UPDATE: New way :)

Results: