There's not many examples of these new layouts out on the Internet and those few that are out there are all based on same basic approach. How about if I don't have a proper toolbar in my app, but still want to use the cool functionalities of new material design layouts?
One thing that I've been trying out is using a MapView and RecyclerView inside CoordinatorLayout with a parallax scrolling effect. It works great, but there's a problem. If my adapter count is low, the RecyclerView doesn't remain on the bottom of screen. Here's some images to better describe the problem.
Initial screen:
RecyclerView scrolls over MapView, leaving blank space below:
Is there a way to keep RecyclerView on bottom?
My xml looks like this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|enterAlways">
<com.google.android.gms.maps.MapView
android:id="#+id/tts_main_map"
android:layout_width="match_parent"
android:layout_height="250dp"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</android.support.design.widget.CoordinatorLayout>
Try to set the android:minHeight property of the CollapsingToolbarLayout dynamically depending on how many items you have in the list. I.e. you should set (pseudo-code):
minHeight = allAvailableHeight - (oneListItemHeigh * listItemCount)
PS. It just an idea, I did not tried. But I think it should works.
Related
I'm trying to have a collapsing toolbar view with two snapping point. Is there any way to do this. I'm trying for two days and couldn't find a proper solution. I want something like this:
**
Default look:
**
**
First snapping point:
**
**
Second snapping point:
**
I think you know how to set up a Collapsing Toolbar right?
If you have done that you can get two snapping points with just setting the scroll flags as follows:
<android.support.design.widget.CollapsingToolbarLayout
...stuff...
app:layout_scrollFlags="scroll|enterAlways|snap">
If that doesn't work for you, I found a great post that provides a custom scrolling behaviour. Cheers
So after reading a lot of stack question's and find out their solution has a lot of complex code(and I'm so lazy) for this simple task. I fond a simple solution:
this is my collapsing tollbar layout:
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appBar"
android:layout_width="match_parent"
android:layout_height="258dp"
android:background="#android:color/transparent"
android:fitsSystemWindows="true"
android:minHeight="60dp"
app:elevation="0dp"
app:layout_insetEdge="top">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsingToolbarLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="#android:color/transparent"
app:layout_scrollFlags="scroll|enterAlways|snap">
**/**** First snapping point ***************/**
<com.google.android.material.appbar.MaterialToolbar
android:id="#+id/toolbarOne"
android:layout_width="match_parent"
android:layout_height="70dp"
app:layout_collapseMode="pin" />
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
for the first snapping point you can use a toolbar with layout_collapseMode="pin" and set the size that you want for the snap position.
now for the second snapping point in your content layout witch have a nested scroll view or whatever, you can use a transparent view with the size you want for second snap position. this will avoid the app bar to rich the scroll rang and you have second snap point:
<androidx.core.widget.NestedScrollView 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:id="#+id/nestedScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/fragment_calendar">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
**/**** second snapping point ***************/**
<ImageView
android:id="#+id/daily"
android:layout_width="match_parent"
android:layout_height="60dp"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.ConstraintLayout
style="#style/PageBackground.White"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/daily"
android:background="#drawable/background_top_corner_calendar">
your content.....
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
I am working with a RecyclerView which will be used to load potentially many images and I'd like to have an actionbar above the RecyclerView like this:
But I'd also like the actionbar to only have that grayish background at the very top. If the user scrolls, it should be totally transparent like this:
I've accomplished what I wanted by using this as my layout (with one major issue):
fragment_recycler_gallery.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView 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"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!-- Gray bar at top -->
<View
android:id="#+id/gray_bar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#null" />
<android.support.v7.widget.RecyclerView 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:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
The NestedScrollView is key to getting my entire fragment to scroll instead of only the RecyclerView but it makes my app slow or unresponsive when loading a large set of images (500+). Is there a better way to create what I'm looking for? I've tried finding solutions but all I can find is "don't use recyclerviews inside nestedScrollViews" without any alternative solutions offered.
I'm using Glide to load the images into each ImageView(within the recyclerview) if that matters as well.
And I'm already using this on my RecyclerView as well:
mAlbumRecyclerView.setNestedScrollingEnabled(false);
Any time you use wrap_content on a RecyclerView, you're setting yourself up for performance problems. Using wrap_content completely defeats the performance improvements that you get from recycling views. So the question, then, is how you can do what you want without using wrap_content.
One thing you could do is use a FrameLayout to overlay a Toolbar on top of your RecyclerView, and then use padding on the RecyclerView (combined with android:clipToPadding="false") to make things appear to start below the actionbar. As long as your toolbar has a translucent background color, your recyclerview content will appear below it when you scroll.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="?attr/actionBarSize"
android:clipToPadding="false"
app:layoutManager="android.support.v7.widget.LinearLayoutManager"
tools:listitem="#layout/itemview"/>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#1111"
app:title="Hello world"/>
</FrameLayout>
I tend to further elaborate from this
Android - footer scrolls off screen when used in CoordinatorLayout
and
https://code.google.com/p/android/issues/detail?id=177195
I wish to hide TabLayout while performing scrolling on RecyclerView. That's why I have the following layout.
<CoordinatorLayout>
<CollapsingToolbarLayout>
<TabLayout>
<ViewPager>
<RecyclerView>
<Footer>
For my situation, I have a ViewPager which contains multiple fragments.
Most of the fragments, contains RecyclerView and footer. They look like the following
<LinearLayout>
<RecyclerView />
<LinearLayout id="#+id/footer" />
</LinearLayout>
Unfortunately, the footer is movable when scrolling, although I would like it to be static.
Note, it is important to have app:layout_behavior to place in ViewPager instead of RecyclerView. If not, TabLayout will not appear.
My implementation is as follow
my_fragment.xml
<?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"
android:id="#+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" >
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|enterAlways|snap">
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorColor="?attr/portfolioTabIndicatorColor" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="org.yccheok.xxx.CustomScrollingViewBehavior"
/>
</android.support.design.widget.CoordinatorLayout>
The very key class is org.yccheok.xxx.CustomScrollingViewBehavior, which is copied and pasted from https://stackoverflow.com/a/33396965/72437
org.yccheok.xxx.CustomScrollingViewBehavior is the best solution I can find so far. However, it is far from perfect, as it yields the following behavior.
It causes flickering, when you scroll up a little, and release your finger. Please refer to the following video.
https://youtu.be/8RvCZJeQvS0
I was wondering, based on proposed solution at https://stackoverflow.com/a/33396965/72437, is there any further improvement I can done on CustomScrollingViewBehavior class, to avoid flickering effect?
I was able to achieve what I want, by following tutorial at
https://mzgreen.github.io/2015/02/15/How-to-hideshow-Toolbar-when-list-is-scroling%28part1%29/
http://mzgreen.github.io/2015/02/28/How-to-hideshow-Toolbar-when-list-is-scrolling%28part2%29/
The key ideas are
Don't use CoordinatorLayout
Place TabLayout and RecyclerView within FrameLayout, so that TabLayout will overlay on the top of RecyclerView
Add top padding on RecyclerView. Having android:clipToPadding="false" is important as well.
To hide/ show TabLayout during scrolling, attach HidingScrollListener to RecyclerView.
The shortcoming for this solution is that, requiresFadingEdge will no longer work on RecyclerView, due to the top padding.
I'm trying to obtain this effect where if the user scroll a RecyclerView a certain layout scroll up together with the recycler and disappear behind a Toolbar.
A similar behavior could be obtained using the CoordinatorLayout, this would be possible by setting
app:layout_behavior="#string/appbar_scrolling_view_behavior"
on the said Recycler, and doing
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"/>
</android.support.design.widget.AppBarLayout>
Also, If I put a second child inside the AppBarLayout, and set app:layout_scrollFlags to it, the effect obtained is the same, with both layout scrolling together with the Recycler.
What I'm trying to achieve is to keep the first child (The toolbar) fixed in position, and let the second child (a LinearLayout) to scroll and hide behind the toolbar. Unfortunately I couldn't get to this behavior.
Is it possible without using 3rd part library?
Thanks in advance and sorry for my english.
Finally I figured out a way to achieve this behavior, by including the CoordinatorLayout in an LinearLayout and making the second child(LinearLayout) become the first, by moving the Toolbar to the extrnal(root) level
Hierarchy before:
<CoordinatorLayout>
<AppBarLayout>
<ToolBar>
<LinerarLayout>
Hierarchy after:
<LinearLayout>
<ToolBar>
<CoordinatorLayout>
<AppBarLayout>
<LinearLayout>
An exmaple:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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"
android:orientation="vertical">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="48dp" />
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="16dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorSecondaryLight"
android:orientation="vertical"
app:layout_scrollFlags="scroll"/>
</com.google.android.material.appbar.AppBarLayout>
.
.
.
.
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</LinearLayout>
Hope that helps!
I have this layout:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|snap"/>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</android.support.v7.widget.RecyclerView>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fabButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:src="#drawable/ic_favorite_outline_white_24dp"/>
</android.support.design.widget.CoordinatorLayout>
Setting #string/appbar_scrolling_view_behavior attribute shifts the RecyclerView by the height of the Toolbar.
But what if I need the first element of the RecyclerView to be aligned to the status bar.
I want the Toolbar to cover (be above) the first element.
In other words, I don't want any offset which #string/appbar_scrolling_view_behavior behaviour entails.
Could you please tell me how to do that?
I had the same problem and I just wrapped the AppbarLayout and the rest of my views (in your case the recyclerview) in a RelativeLayout and it works fine. I don't know if there are any downsides with that approach.
The offset is not by #string/appbar_scrolling_view_behavior behaviour it's due to AppBarLayout it pushes the content down.
I'm not sure if there is any other better solution. But I'd suggest to remove the AppBarLayout to have your content go under the Toolbar. Moreover you might be need the scrolling behaviour for that you can check the library below.
It's been used by lots of apps like Jair Music Player even WhatsApp too uses it.
Library:
Android Observable Scroll View