Develop Reference

Toolbar jump when stop NestedScrollView scroll

I am experiencing a weird toolbar scrolling issue. After I scroll the toolbar up and while it's moving upward with inertia (fling), I try to stop the child view by touching on the NestedScrollView and the toolbar is automatically expanded. (both views jump back as you can see toward the end of the attached gif.)
My layout is pretty straightforward. It's based on Android Studio project template.
Any thought of how to make the behavior looks more natural?
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="400dp"
app:layout_scrollFlags="scroll"
app:popupTheme="#style/AppTheme.PopupOverlay"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/text_margin"
android:text="#string/large_text"/>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>

you need to add a CollapsingToolbarLayout widget inside AppBarLayout. so when you scroll down/up the Toolbar/Appbar will collapse/expand smoothly.
The whole appbarlayout should be changed to:
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
app:expandedTitleTextAppearance="#style/CollapsingToolbarTitleText"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="#dimen/article_keylines"
app:expandedTitleMarginStart="#dimen/md_keylines"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

Android zoom/scale image in coordinator layout

I have issue and i don't how to solve it.
So, how to make ImageView in CollapsingToolbar overscrollable?
For example,
CoordinatorLayout
-- AppBarLayout
-- CollapsingToolbarLayout
----30% Non visible part----
----40% Visible part, center of image----
----30% Non visible part----
--NestedScrollView <-- Here content
How to make when user fling down by image, make image visible part of image bigger? I tried to wrap imageview into scrollview and make overscroll, but image is cropped.
Any ideas?
Layout:
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/coordinator"
android:focusableInTouchMode="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="view.utils.FlingBehavior"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:contentScrim="#android:color/white"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
android:fitsSystemWindows="true">
<!-- In this block my imageview and two textviews -->
<view.DetailsTopBlock
android:id="#+id/details_review_top_block"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
android:layout_height="#dimen/dp_320" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:orientation="vertical"
android:clipToPadding="false"
android:overScrollMode="always"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:visibility="visible">
<!-- content here-->
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
Thanks

Android: When I scroll the screen to top, why the scroll stop on Toolbar?

I'm using the follow code:
<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
<ImageView
android:layout_width="match_parent"
android:layout_height="300dp"
android:src="#drawable/ferias_janeiro"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.7" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView ... >
When I scroll the screen from bottom to top, the scroll stop at begin of NestedScrollView, I must scroll again to expand the CollapsingToolbarLayout. How can I fix that?
The effect is the same of the contact screen of the Android, when I scroll the screen from bottom to top, the screen hit the top and show the contact image (CollapsingToolbarLayout full expanded).

Remove app:layout_collapseMode="pin" from the Toolbar

CollapsingToolbarLayout doesn't work well with NestedScrollView

I made an activity where image should collapse with toolbar and only text below would be visible. But When Toolbar being collapsed, there shows up a large gap between Toolbar and NestedScrollView
<android.support.design.widget.CoordinatorLayout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:background="#color/white"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
app:elevation="5dp"
app:layout_collapseMode="pin"
android:fitsSystemWindows="true"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:toolbarId="#+id/toolbar"
android:id="#+id/collapsing"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<com.noframe.farmisagronom.util.ResizibleImageView
android:id="#+id/image_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
android:minHeight="100dp"
android:maxHeight="400dp"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.5"
android:scaleType="centerCrop"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:popupTheme="#style/ThemeOverlay.AppCompat.Light"
android:minHeight="?attr/actionBarSize"
app:layout_collapseMode="pin"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/nesteview"
app:layout_anchorGravity="top"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
.....
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
And this activity looks really good.
But when i scroll up the NestedScrollView this goes out of control.
This little space between toolbar and text is getting on my nerves.
note that if there is large text in NestedScrollView problem won't show up, but if NestedScrollView + collapsed tool bar doesn't take all phone screen, then there is a gap between them.

Adding:
android:layout_gravity="fill_vertical"
to the NestedScrollView worked for me.

CollapsingToolbarLayout expansion not working with RecyclerView

The behavior of CollapsibleToolbarLayout with regards to the RecyclerView seems broken. When setting a value for
app:layout_scrollFlags
If you do not use "scroll|enterAlways", the Collabsible layout will never expand. It will always contract, but when you pull down, it does not expand anymore, so it just gets locked to the top.
If you use "scroll|enterAlways", it works as expected, meaning it instantly expands the header to its full height whenever you scroll down.
Without knowing anymore, it seems as if the Collapsible layout cannot properly determine when the RecyclerView is at the top of the list, as that is the criteria for when it should expand to full height in the other cases.
Here is the layout that I am testing with. The java code isn't really important, it is just populating the recyclerview with dummy data and using a LinearLayoutManager.
<?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:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="200dp"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:toolbarId="#id/toolbar_id"
app:contentScrim="#color/white"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_id"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>

Try with scroll|enterAlways|enterAlwaysCollapsed. This way the toolbar should always enter in the collapsed mode, and then expand when you reach the top of the sibling view.

If you want to show a list with RecyclerView under the AppBarLayout you should place the RecyclerView XML under
<android.support.design.widget.CoordinatorLayout
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.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="200dp"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:toolbarId="#id/toolbar_id"
app:contentScrim="#color/white"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_id"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>