Develop Reference

How to set toolbar title when a text view hide from screen?

How to implement that action which is shown in image
https://i.stack.imgur.com/MluU2.jpg

Use this piece of code to hide your 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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
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"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>
<!-- Your Remaining Code -->
</android.support.design.widget.CoordinatorLayout>

Try using a collapsingToolbar layout. The material design example is found here but of significance is the below snippet
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleGravity="top"
app:expandedTitleMarginStart="#dimen/shrine_toolbar_offset_start"
app:expandedTitleMarginTop="#dimen/shrine_toolbar_offset_top"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/shrine_toolbar_image_offset_top"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.5"/>
<android.support.v7.widget.Toolbar
android:id="#+id/AppBar"
android:layout_width="match_parent"
android:layout_height="#dimen/shrine_toolbar_collapsed_height"
app:layout_collapseMode="pin"/>
</com.google.android.material.appbar.CollapsingToolbarLayout>

SearchView inside Coordinator layout

How can i achieve following layout design where on scrolling up i just get the view with searchview :
1 ----
2------On Scrolling up :
I've tried putting views at certain places in the layout but searchview always ends up in the top most area instead of below home logo or not even visible.
My current layout without any searchview is :
<?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:background="#CFD8DC"
android:fitsSystemWindows="true"
tools:context="com.example.svatts.my22.ScrollingActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
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="?android:attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="56dp"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_scrolling" />
</android.support.design.widget.CoordinatorLayout>

Change your entire toolbar into the following and mind this line:
app:layout_scrollFlags="scroll|enterAlways|snap"
<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">
Then under your toolbar add your view with tabMode scrollable like this:
<your.search.layout
android:id="#+id/your_search_layout_id"
android:layout_width="match_parent"
android:layout_height="your_height"
app:tabMode="scrollable"/>
And add following layout to your content_scrolling you want to scroll with the tab bar
app:layout_behavior="#string/appbar_scrolling_view_behavior"
Working Example
<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
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.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout_main"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="scrollable"/>
</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" />

You can use NestedScrollView for this purpose along with AppBarLayout. For better compatibility use EditText instead of SearchView.
More information here.

Having a whitespace issue with Recyclerview inside Scrolling Activity

Im having a white space issue in my Recyclerview inside Scrolling activity.
Please help me to resolve this problem. i have checked everything i have known such as no margins,paddings,tried by removing the FAB. but still the problem exists.
My XML code:
<?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"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
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" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/id_recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email"
app:layout_anchor="#id/app_bar"
app:layout_anchorGravity="bottom|end" />
</android.support.design.widget.CoordinatorLayout>

Try this by removing android:fitsSystemWindows="true" and android:layout_height="wrap_content"
<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">

Try this :
<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">

Atlast i figured it now,
First of all,Thanks to TWL for giving me an idea by a same issue of his question .
I removed the android:fitsSystemWindows="true" from the CoordinatorLayout.
Now, your notification bar's color is probably change to Transparent and looks horrible. So, i have added <item name="android:statusBarColor" tools:targetApi="lollipop">#color/colorPrimary</item> in styles.
Now everything is Okay.

Blank bar at top of toolbar in Android Marshmallow

Got an empty white bar at the top of toolbar only in Android MarshMallow Versions.
All other android versions are set to display correctly.

This is raised due to usage of BottomBar plugin in my code https://github.com/roughike/BottomBar
The issue is straightaway solved in documentation
Why does the top of my content have sooooo much empty space?!
Probably because you're doing some next-level advanced Android stuff (such as using CoordinatorLayout and fitsSystemWindows="true") and the normal paddings for the content are too much. Add this right after calling attach():
mBottomBar.noTopOffset();

You have to put DrawerLayout as parent of all. So put DrawerLayout as I posted Answer on below. This is the basic Structure I post it.
Just an Example :
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinator"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay"
app:elevation="0dp">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="0dp"
android:minHeight="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/app_nav_header_main"
app:menu="#menu/main_drawer" />
</android.support.v4.widget.DrawerLayout>

Have you added android:fitsSystemWindows="true" to your parent?
<android.support.v4.widget.DrawerLayout
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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<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="match_parent">
<!--Toolbar-->
<android.support.design.widget.AppBarLayout
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="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<!--================ CONTENT ================-->
<!-- PUT SOMETHING -->
<!--/ ================ END CONTENT ================-->
</android.support.design.widget.CoordinatorLayout>
<!--Drawer-->
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_base"
app:menu="#menu/activity_base_drawer" />
</android.support.v4.widget.DrawerLayout>

Android Scroll Text View in Coordinatore layout + Recycler View

In my layout I have a Card View Layout containing HashTagView and then followed by recycler view. Using my existing code I am able to scroll through the recycler view. But I also want to be able to scroll the HashTagView itself.
<?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"
android:id="#+id/activity_main_id"
tools:context="mymainactivity.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
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"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
android:fitsSystemWindows="true">
<android.support.v7.widget.CardView style="#style/Card">
<LinearLayout style="#style/CardContainer"
android:isScrollContainer="true">
<com.greenfrvr.hashtagview.HashtagView
android:id="#+id/hashtags6"
style="#style/HashtagView"
app:rowGravity="center"
app:rowMode="stretch"
app:selectionMode="true"
app:tagBackground="#drawable/item_bg_1"
app:tagForeground="#drawable/flat_button_light"
app:tagPaddingBottom="#dimen/padding_vertical"
app:tagPaddingLeft="#dimen/padding_horizontal"
app:tagPaddingRight="#dimen/padding_horizontal"
app:tagPaddingTop="#dimen/padding_vertical"
app:tagTextColor="#E5E5E5" />
</LinearLayout>
</android.support.v7.widget.CardView>
<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.v7.widget.RecyclerView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
I want to acheive this kind of layout:-