Develop Reference

How to sync scroll of 2 Appbar layout and Coordinator layout

Activity 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/coord"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapse_layout"
android:layout_width="match_parent"
android:layout_height="200dp"
app:layout_scrollFlags="scroll|snap|enterAlwaysCollapsed">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#drawable/material_flat"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
style="#style/ToolBarWithNavigationBack"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/transparent"
app:layout_collapseMode="pin"></android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
<LinearLayout
android:id="#+id/tab_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:background="#android:color/white"
android:clipToPadding="true"
android:gravity="center"
android:orientation="vertical"
android:paddingTop="10dp"
app:layout_scrollFlags="scroll|enterAlways|snap">
<android.support.design.widget.TabLayout
android:layout_width="fill_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
app:tabIndicatorColor="#BDBDBD"
app:tabIndicatorHeight="4dp"
app:tabSelectedTextColor="?android:attr/textColorPrimaryInverse"
app:tabTextAppearance="#android:style/TextAppearance.Widget.TabWidget" />
</LinearLayout>
</android.support.design.widget.AppBarLayout>
​
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
Fragment xml
<?xml version="1.0" encoding="utf-8"?>
<NestedCoordinatorLayout
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:background="#android:color/background_light">
<android.support.design.widget.AppBarLayout
android:id="#+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/white"
app:theme="#style/ThemeOverlay.AppCompat.Dark">
<LinearLayout
android:id="#+id/home"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#e3e6e8"
android:gravity="center"
android:orientation="vertical"
android:padding="20dp"
app:layout_scrollFlags="scroll|enterAlwaysCollapsed|snap">
<android.support.v7.widget.CardView
card_view:cardCornerRadius="4dp"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_margin="24dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/shade_gradient" />
</android.support.v7.widget.CardView>
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="15dp" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/simple.viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</NestedCoordinatorLayout>
When the appbar layout in fragment scrolls, the appbar layout of the activity also should scroll.
Currently when the touch is on the view pager in the fragment, both appbar scroll together, but when the touch is on the appbar of the fragment, only the appbar of fragment scrolls

Android Nested Scrollview not scrolling

I am having a Nested ScrollView which contains contents inside a Linear Layout.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:CoverFlowPager="http://schemas.android.com/apk/res-auto"
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.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:clipToPadding="false"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</FrameLayout>
I have this layout inside a ViewPager and ViewPager is inside a CordinatorLayout.
<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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
Now when I scroll the view the view is not scrolling. But since the layout is placed inside the Cordinator layout its moving up till the ToolBar is hid. But its not scrolling up.
Here is my main activity xml, The view pager is inside a tabbed layout.
<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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:attrs="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
<FrameLayout
android:id="#+id/titleContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center">
<com.CustomFontTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Toolbar Title"
android:textColor="#ffffff"
attrs:customFont="handyman_bold"
android:textSize="8pt"
android:layout_marginLeft="-20dp"
android:id="#+id/toolbar_title"/>
</FrameLayout>
<ImageButton
android:id="#+id/btn_ToolBarRightBtn"
android:layout_width="32dp"
android:layout_height="28dp"
android:tag="0"
android:background="#null"
android:scaleType="fitXY"
android:src="#drawable/icon_shopping"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:layout_marginRight="10dp"
/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_gravity="bottom"
android:background="#color/offwhite"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.CoordinatorLayout>
Here is my screenshots,
Initial View
When view is scrolled up, it scrolls only to hide the top navigation bar. Its not scrolling to display the items below the tab bar,

app:layout_behavior="..." should be set on a direct child of CoordinatorLayout. If your ViewPager is a direct child of CoordinatorLayout, place it to ViewPager declaration.

Quote from here: Troubleshooting Coordinator Layouts
When coordinating between a fragment with a list of items inside of a ViewPager and a parent activity, you want to put the app:layout_behavior property on the ViewPager as outlined here so the scrolls within the pager are bubbled up and can be managed by the CoordinatorLayout. Note that you should not put that app:layout_behavior property anywhere within the fragment or the list within.

You can try this! I had the same problem with my app. This worked for me.
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:attrs="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
<FrameLayout
android:id="#+id/titleContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center">
<com.CustomFontTextView
android:id="#+id/toolbar_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="-20dp"
android:gravity="center"
android:text="Toolbar Title"
android:textColor="#ffffff"
android:textSize="8pt"
attrs:customFont="handyman_bold" />
</FrameLayout>
<ImageButton
android:id="#+id/btn_ToolBarRightBtn"
android:layout_width="32dp"
android:layout_height="28dp"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:layout_marginRight="10dp"
android:background="#null"
android:scaleType="fitXY"
android:src="#drawable/icon_shopping"
android:tag="0" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#color/offwhite" />
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:clipToPadding="false"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"></LinearLayout>
</android.support.v4.widget.NestedScrollView>

try this
scroll.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
v.getParent().requestDisallowInterceptTouchEvent(true);
return false;
}
});

The ScrollingViewBehavior is just add top and bottom offset to your ViewPager. Generally the offset depends on AppBarLayout height and it do not depends on your TabLayout height because it is not in the AppBarLayout. So, for quick workaround you can just add paddingBottom to your ViewPager like this:
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="50dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_gravity="bottom"
android:background="#android:color/black"
android:layout_width="match_parent"
android:layout_height="50dp"/>

So here is the problem, you cannot have a NestedScrollView within the FrameLayout.
Also, some other smaller changes needed in xml to make it work.
Like the TabLayout has to be inside AppBar Layout and be pinned.
Here's your code -->
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_gravity="bottom"
android:background="#color/offwhite"
android:layout_width="match_parent"
app:layout_collapseMode="pin"
app:layout_anchor="#+id/appbar"
app:layout_anchorGravity="bottom"
android:layout_height="wrap_content"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
And --> Change your Fragment code to remove the frame layout!
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:CoverFlowPager="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:clipToPadding="false"
android:fillViewport="true">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
Hope this helps!

Coordinator Layout with ViewPager and ListFragment not scrolling

I have implemented a view pager within a Coordinator layout that contains a ListFragment. The view pager is working fine but the list does not scroll,
can anyone help? Do I have to implement something to recognise the direction of the touch and then disable touch events?
Coordinator 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"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout android:id="#+id/app_bar"
android:layout_height="wrap_content" android:layout_width="match_parent"
android:theme="#style/AppTheme.AppBarOverlay">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar android:id="#+id/toolbar"
android:layout_height="?attr/actionBarSize" android:layout_width="match_parent"
app:popupTheme="#style/AppTheme.PopupOverlay" />
<com.passwordstore.utility.SlidingTabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary" />
<View
android:layout_width="match_parent"
android:layout_height="4dp"
android:background="#android:color/white"
android:foreground="#drawable/shadow"/>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_height="0dp"
android:layout_width="match_parent"
android:layout_weight="1"
android:background="#android:color/white"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</LinearLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout android:layout_width="match_parent" android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" android:id="#+id/frameLayout">
<include layout="#layout/activity_password_list" />
</FrameLayout>
<android.support.design.widget.FloatingActionButton android:id="#+id/fabNew"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_margin="#dimen/fab_margin" android:src="#drawable/ic_add_white_24dp"
app:layout_anchor="#+id/frameLayout"
app:layout_anchorGravity="bottom|right|end"/>
</android.support.design.widget.CoordinatorLayout>
Fragment - activity_password_list:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="#+id/item_list"
android:name="com.passwordstore.fragment.PasswordListFragment" android:layout_width="match_parent"
android:layout_height="match_parent" android:layout_marginLeft="16dp"
android:layout_marginRight="16dp" tools:context=".PasswordListActivity"
tools:layout="#android:layout/list_content" />

I had the same result with the same issue, i just had to used these custom layouts, you may want to take a look:
https://github.com/TheLittleNaruto/SupportDesignExample/tree/master/app/src/main/java/com/thelittlenaruto/supportdesignexample/customview

coordinate layout issue while loading in frameLayout

I am working on code that have FrameLayout and customview at bottom. I loaded a fragment inside FrameLayout, which is having CoordinatorLayout with ViewPager inside.
So problem is ViewPager takes full height of the phone and hide contents of list behind customview. Here is Code:
main_layout.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/root_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/playerView"
android:layout_alignParentTop="true" />
<TextView
android:id="#+id/playerView"
android:layout_width="match_parent"
android:layout_height="#dimen/player_size"
android:layout_alignParentBottom="true"
android:background="#D7D7D7"
android:gravity="center"
android:text="Player View"
android:textSize="20sp" />
</RelativeLayout>
fragment_view.xml
<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/main_content"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<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"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs_view_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="pin"
android:background="?attr/colorPrimary"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/tabs_view_viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
In above image you can see some content of list is hidden beside PlayerView.

Try to use LinearLayout with layout_weight instead of RelativeLayout inside main_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="#+id/root_content"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<TextView
android:id="#+id/playerView"
android:layout_width="match_parent"
android:layout_height="#dimen/player_size"
android:background="#D7D7D7"
android:gravity="center"
android:text="Player View"
android:textSize="20sp" />
</LinearLayout>

FrameLayout doesn't fill CoordinatorLayout after GONE a view

Here is my main layout :
<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="fill_parent"
android:animateLayoutChanges="true"
android:orientation="vertical">
<RelativeLayout
android:id="#+id/top_con"
android:layout_width="match_parent"
android:layout_height="64dp"
android:background="#cc0000">
<TextView
android:id="#+id/close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:clickable="true"
android:text="Close"
android:textColor="#ffffff" />
</RelativeLayout>
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffffff">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/blue"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<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"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/green"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
After event onClick on TextView (id/close), I set visibility for RelativeLayout (id/top_con) to GONE. But FrameLayout (contain a recycler view) still keep their height, and there's a white space (white is background color of CoordinatorLayout ) at bottom of sreen.
What is problem and how can fix it?
Thank you!