Basically I want to achieve the same behaviour as that of the android status bar; when we swipe down from the top, a compact version with the frequently used buttons is shown. Upon swiping down further the status bar expands to show the expanded view.
I want to implement a toolbar in an app with the exact behaviour of the status bar as shown in the images. The first swipe on the NestedScrollView inside CollapsingToolbarLayout should expand the the toolbar to show the compact view, and the second swipe should expand the toolbar further to show the expanded view of the toolbar
How can i do that?
That is called CollapsingToolbarLayout the UX of that layout is to expand when swipe down and collapse when swipe up. The dependency of that layout is Android Support Design Library. Here is a nice tutorial for this.
Related
I have a fragment, within that fragment I want to display a standard bottom sheet. When the sheet is expanded Id like to display a toolbar at the top of the sheet, with close/collapse button, something like presented on https://material.io/components/sheets-bottom#behavior under Behaviour -> Visibility -> FullScreen
To my surprise Im struggling to achieve similar effect - tried applying different scroll flags (app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed") however Im getting opposite results - toolbar is visible when sheet is half extended and disappars when I scroll the sheet to the top.
Based on this tutorial, https://github.com/saulmm/CoordinatorBehaviorExample,I am trying to create an application which have a circle image that scrolls up to the Right of Toolbar and when scrolling down goes to the middle of the expanded AppBarLayout.
How to make it move to right of Toolbar with above mentiond behaviour and animation.
AppBarTranslateScaleBehavior will help you achieve such a behavior.
The classic coordinator layout gives you the following [source]:
However, I don't want the top header views to scroll until they "become" a toolbar pinned at the top, with a shadow below. I want them all fixed (or pinned) but to show the shadow only the nested scroll view starts to scroll under the pinned ones. Something like the main app drawer on Marshmallow devices, where the "search bar" becomes pinned and the list of apps scroll under it.
Hope I made myself clear. Is there any easy way I could achieve that without listening for scroll events and handling this manually?
EDIT
Here is what I'm trying to achieve:
. Notice on the right image how there is now a shadow below the list of apps because the user scrolled the list.
Thank you!
This is exactly what you are looking for: HideOnScroll
Set actionBar elevation to 0 initially. Add a scroll listener to your scrolling element. When you detect it has scrolled (dy > 0) you set the actionBar elevation to 4dp(the default actionBar elevation) and back to 0dp at dy == 0.
In your scroll listener you can, at least for recyclerViews, use the canScrollVertically function to check if you're at the top or not.
I'm using the Toolbar widget of appcompat v21.
Without hiding the toolbar title I want to add some views (ie: textview, button) to the content of the toolbar.
By default they are positioned to the left, but I need to put them to the right. I managed to do it with a RelativeLayout. The problem is that the RelativeLayout takes all the toolbar's space and the title is not visible anymore.
There is a way to do it without hide the title?
I was wondering how to create a navigation bar
like the one at the top of the screen that moves when "flicked" or scrolled.
Use a HorizontalScrollView, wrapped around a LinearLayout of Buttons or ImageButtons.