When the activity is opened, it shows the top of the RecyclerView layout instead of the top of the activity layout.
Activity layout .xml file:
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingBottom="20dp"
android:paddingTop="20dp">
...
<RelativeLayout/>
<View />
<LinearLayout/>
...
<android.support.v7.widget.RecyclerView
android:id="#+id/venue_place_info_gallery_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"/>
</LinearLayout>
</ScrollView>
Activity onCreate:
RecyclerView galleryRecyclerView = (RecyclerView) findViewById(R.id.venue_place_info_gallery_recycler_view);
galleryRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(gridLayoutColumns, StaggeredGridLayoutManager.VERTICAL));
VenueGalleryAdapter venueGalleryAdapter = new VenueGalleryAdapter(VenuePlaceInfoActivity.this, images);
galleryRecyclerView.setAdapter(venueGalleryAdapter);
The adapter is very simple. It receives the images as an argument in the constructor and the data cannot be changed later on.
I've tried to apply all kinds of settings to the RecyclerView layout, but it works the same with or without them. For example:
galleryRecyclerView.setNestedScrollingEnabled(false);
galleryRecyclerView.setHasFixedSize(true);
galleryRecyclerView.setLayoutFrozen(true);
galleryRecyclerView.setPreserveFocusAfterLayout(false);
UPDATE:
I have found more info on the subject in the answer of another question. It's all because of the ScrollView and RecyclerView not being capable to live together even if you set setNestedScrollingEnabled to true. But it still doesn't give me the resolution of my problem. I need to have some stuff above the gallery RecyclerView and I want to scroll down through all the images (not putting them in a container).
If you want your layout to look good, I would use a CoordinatorLayout with an AppBarLayout as the first element inside it, and the RecyclerView as the second. Inside the AppBarLayout, you should put whatever it is that you would like to have above the RecyclerView. Something similar to this:
<LinearLayout
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:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#color/white">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:elevation="0dp">
<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"
app:titleEnabled="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:orientation="vertical"
android:paddingTop="20dp"
app:layout_collapseMode="parallax">
<!-- stuff you want above your recyclerview -->
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
</LinearLayout>
Someone does something similar here, just instead of using a toolbar in the appbarlayout, you may use whatever view layouts you'd like. AppBarLayout is an extended Vertical LinearLayout: http://www.basagee.tk/handling-scrolls-with-coordinatorlayout/
just add the following tag on your activity/fragment root layout and you are good to go.
android:descendantFocusability="blocksDescendants"
Related
As we can see from the below sample, on changing the visibility of the view from gone to visible and vice versa, the appbar automatically expands and scrim drawn is shown as well.
<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/crl_parent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:fillViewport="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/abl_appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/transparent">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="#drawable/shape_rectangle_grdient_red_yellow"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="parallax">
<FrameLayout
android:id="#+id/fl_class"
android:layout_width="match_parent"
android:layout_height="#dimen/d_280dp"
android:background="#color/colorPlaceholderBg">
<ImageView
android:id="#+id/iv_class"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:src="#color/colorPlaceholderBg" />
<ProgressBar
android:id="#+id/pb_dp_progress"
android:layout_width="#dimen/d_20dp"
android:layout_height="#dimen/d_20dp"
android:layout_gravity="center"
android:visibility="visible" />
</FrameLayout>
<RelativeLayout
android:id="#+id/rl_toolbar"
android:layout_width="match_parent"
android:layout_height="#dimen/toolbar_default_height"
android:background="#drawable/shape_rectangle_transparent_grey_gradient">
<ImageView
android:id="#+id/iv_back"
... />
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/tl_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:minHeight="#dimen/toolbar_default_height"
android:visibility="visible"
app:contentInsetStart="#dimen/d_0dp"
app:layout_collapseMode="pin">
<include layout="#layout/view_toolbar" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/fragment_class_details_content" />
</android.support.design.widget.CoordinatorLayout>
This the code for the outer layout. As can be seen from the above layout that the pattern is mostly standard. I have tried replicating the bug in new sample but of no use. The initial problem seem to be changing the height of nested scroll view on runtime seems to be the problem but that is not the case. I tried to setExpand(false) on the click of the button but that is not working as well.
<img src="https://i.imgur.com/YGTT3oL.gif" title="source: imgur.com" />
Link to demo gif is here: https://i.imgur.com/YGTT3oL.gif
I bet the problem is caused by app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
You have to define the behavior you want when scrolling, check out this article: https://medium.com/martinomburajr/android-design-collapsing-toolbar-scrollflags-e1d8a05dcb02
Since I dont know what behaviour do you want, read the article and choose yourself. Hiding and showing the view is triggering those flags.
In your #layout/fragment_class_details_content check if
app:layout_behavior="#string/appbar_scrolling_view_behavior"
is present in the parent layout.
Also change app:layout_scrollFlags="scroll|exitUntilCollapsed|snap" to
app:layout_scrollFlags="scroll|exitUntilCollapsed"
Add this attribute to the CollapsingToolbarLayout
app:toolbarId="#+id/tl_toolbar"
Add this attribute to Toolbar:
app:popupTheme="#style/AppTheme.PopupOverlay"
Extract your gone/visible layout from android.support.design.widget.CollapsingToolbarLayout.
Too much nesting you did so avoid nesting and Use constraint layout
I want to have scrollable screen with RecyclerView as one of its children, hierarchy would look like that:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
...
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
.../>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
.../>
<FrameLayout
.../>
<android.support.v7.widget.RecyclerView
android:id="#+id/list_contacts"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
android:nestedScrollingEnabled="false"/>
<FrameLayout
.../>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</LinearLayout>
Note that all the items of RecyclerView should be visible and be siblings of ImageView, FrameLayout etc.
In the current solution, there is one significant issue, onBindViewHolder is called for all items at once, but I want them to be bind when they appear on the screen, like in standard RecyclerView. I was doing some experiments with
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
but it failed after all.
I know one of the solutions is implementing heterogeneous recyclerView, but I would like to avoid it. Any ideas?
Probably it happens because in this case, recyclerview cant know the height of itself.
Can you try:
layoutManager.isAutoMeasureEnabled=true
I can't get the anchor to work. it doesn't follow the app bar being scrolled to the top.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:background="#color/testGray">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_height="200dp"
android:layout_gravity="center_horizontal"
>
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:background="?attr/colorPrimary"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame_info"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginTop="140dp"
android:elevation="11dp"
android:layout_gravity="center_horizontal"
app:layout_anchor="#id/appbar"
app:layout_anchorGravity="center|bottom"
>
</FrameLayout>
<team.semicolon.amizeh.CustomViews.SongsListView
android:id="#+id/songs_listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toBottomOf="#id/frame_info"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginTop="60dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
</android.support.design.widget.CoordinatorLayout>
</android.support.constraint.ConstraintLayout>
plus, I can't get the minHeight to work, It scrolls all the way to the top.
I want the frame layout to follow the app bar and anchor it but the app bar scrolls but the frame layout doesn't.
the frame_info doesn't follow the appbar when I scroll, as it was
supposed to do. when I scroll SongsListView to the top, the appbar
moves to the top too, but frame_info stays in place
First of all, i don't suggest such a layout. Like i said, make the CoordinatorLayout as the root of the layout.
Also, if you are trying to achieve FrameLayout follow AppbarLayout when scrolling, you'll need to add it inside a NestedScrollView then setting the NestedScrollView:
app:layout_behavior="#string/appbar_scrolling_view_behavior"
To follow AppbarLayout.
Check my answer about where to using above code : appbar_scrolling_view_behavior https://stackoverflow.com/a/35181870/4409113
I'm having a problem with Coordinatorlayout and ViewPager implementation.
In order to reproduce this you have to scroll down vigorously and while it's still happening try to scroll the list of items up - a sort of shaky stutter effect can be visible as if CoordinatorLayout was trying to scroll the view in separate direction than its child (RecyclerView).
You can view my layout here:
<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/mainContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<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/collapsingToolbarLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<FrameLayout
android:id="#+id/headerContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tabControl"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorHeight="4dp"
app:tabMaxWidth="500dp">
</android.support.design.widget.TabLayout>
<LinearLayout
android:id="#+id/topLayout"
android:layout_width="match_parent"
android:layout_height="48dp"
android:orientation="vertical"
android:visibility="gone" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/tabContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Just to provide some further details:
headerContainer contains ConstraintLayout with some stuff like bunch of textviews, button - pretty usual.
tabContainer contains LinearLayout with list of items (recyclerview)
Add this to the recyclerView in the fragment of your ViewPager..
recyclerView.setNestedScrollingEnabled(false);
This is happening because of the app:layout_behavior="#string/appbar_scrolling_view_behavior" behavior of the viewpager.. this is causing the nestedScrolling.. that is why you feel the shaky effect..
Add this line to your RecyclerView
Recyclerview.setNestedScrollingEnabled(false);
I have 3 views in my layout file with CoordinatorLayout as the root view : AppbarLayout, RecyclerView and a Footer(not visible all the time). Recyclerview implements the default behavior appbar_scrolling_view_behavior, that ideally, brings recyclerview below the appbarlayout. But the recyclerview and footer overlap. To Prevent that, I had to write a custom behavior so that when footer is visible, Recyclerview should make space for the footer. But now, the default behavior of appbar_scrolling_view_behavior is gone and now appbarlayout and recyclerview overlap.Here is the Image of the layout
Link to the custom behavior i implemented:
https://github.com/Mandeep221/CustomBehaviorForRecyclerview/blob/master/CustomBehavior.java
My Question: How can i implement 2 things(simultaneously in one behavior):
get the recyclerview below the appbarlayout inside the co-ordinatorlayout
get the recycelerview to make space for the footer if the footer is visible.
If you can suggest some workaround, that would also be great! Thanks alot!
<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/app_bar"
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
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/list_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="4dp"
android:scrollbars="vertical"
app:layout_behavior="prokure.it.prokure.Search.NewSearch.CustomBehavior" />
<prokure.it.prokure.FooterBarLayout
android:id="#+id/footerBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
//footer child views
</LinearLayout>
</prokure.it.prokure.FooterBarLayout>
</android.support.design.widget.CoordinatorLayout>
Don't keep the android.support.design.widget.CoordinatorLayout as root layout.
Add a RelativeLayout as a root layout. Then add android.support.design.widget.CoordinatorLayout with property layout_alignParentTop and layout_above="#+id/footerBar" and set prokure.it.prokure.FooterBarLayout as align parent bottom as second child of RelativeLayout.
<RelativeLayout
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.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_above="#+id/footerBar">
<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/app_bar"
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/list_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="4dp"
android:scrollbars="vertical"
/>
</android.support.design.widget.CoordinatorLayout>
<prokure.it.prokure.FooterBarLayout
android:id="#+id/footerBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
//footer child views
</LinearLayout>
</prokure.it.prokure.FooterBarLayout>
</RelativeLayout>
Another simpler way is to add following lines to your prokure.it.prokure.FooterBarLayout
app:layout_anchor="#id/list_recycler_view"
app:layout_anchorGravity="bottom"
and keep prokure.it.prokure.FooterBarLayout inside coordinator layout.
Make sure to add an empty cell at the end of the recycler view so that prokure.it.prokure.FooterBarLayout does not overlap with last cell of RecyclerView.