Develop Reference

Disabling the ToolBar overlay Effect and List scroll disable

Problem 1:
I have made my toolbar transparent but There is some sort of overlay effect which I don't want. How can I remove that effect? I have marked that place(1) in a sample image.
code for ToolBar:
<android.support.design.widget.AppBarLayout
android:id="#+id/cvSlider"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="0dp"
android:layout_marginTop="20dp"
app:theme="#style/CustomActionBar"
android:background="#android:color/transparent">
<include layout="#layout/toolbar_layout" />
</android.support.design.widget.AppBarLayout>
ToolBarLayOut:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="0dp"
android:background="#color/transparent"
android:minHeight="?attr/actionBarSize"
>
<RelativeLayout
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/location_ic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_location"
/>
<TextView
android:layout_toRightOf="#id/location_ic"
android:id="#+id/toolbar_title"
android:padding="6dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="#font/custom_font"
android:text="서울 서초구 강남역 주변"
android:textColor="#color/colorWhite" />
<ImageView
android:layout_width="wrap_content"
android:src="#drawable/ic_arrow_drop_down"
android:layout_toRightOf="#id/toolbar_title"
android:layout_height="wrap_content" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
Problem 2: I am using a scroll view with a child list view in my app. but the problem is when I am taping any white space(marked 2) o list item parent scroll is not working but when taping on images then the parent scroll works (Marked 3). only the child list view scroll is working which I don't want I want the parent scroll to work here.

AppBarLayout has StateListAnimator by default try setting it to null using below code
<android.support.design.widget.AppBarLayout
android:id="#+id/cvSlider"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="0dp"
android:layout_marginTop="20dp"
android:stateListAnimator="#null"
app:theme="#style/CustomActionBar"
android:background="#android:color/transparent">
<include layout="#layout/toolbar_layout" />
</android.support.design.widget.AppBarLayout>

app:elevation="0dp" hide layout inside toolbar

I have take custom layout inside the toolbar and perform action according to it.
but in some case i want make toolbar transparent so when i have set app:elevation="0dp" than it will hide my custom layout but still action will performed when click on that area.
I have used following layout inside toolbar.
Edited
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarMain"
app:elevation="0dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:background="#null"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/iv_menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:background="?attr/selectableItemBackgroundBorderless"
android:clickable="true"
android:contentDescription="#null"
android:padding="#dimen/activity_vertical_margin"
android:src="#drawable/ic_menu" />
<FrameLayout
android:id="#+id/frmNotification"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toEndOf="#+id/iv_menu"
android:layout_toRightOf="#+id/iv_menu"
android:background="?attr/selectableItemBackgroundBorderless"
android:clickable="true"
android:padding="#dimen/padding_5">
<ImageView
android:id="#+id/iv_notification"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:contentDescription="#null"
android:padding="#dimen/padding_5"
android:src="#drawable/ic_notification" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginTop="#dimen/padding_5"
android:background="#drawable/bg_bage">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/eight"
android:textColor="#android:color/white"
android:textSize="#dimen/font_8" />
</FrameLayout>
</FrameLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/frmNotification"
android:contentDescription="#null"
android:src="#drawable/logo_header" />
<ImageView
android:id="#+id/ivElasticSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:paddingLeft="#dimen/padding_10"
android:paddingRight="#dimen/padding_15"
android:src="#drawable/ic_search" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
How to overcome this issue because in some scenario we want transparent toolbar but icon inside it should be display.
Here I have attached image how actually look like.

Your idea of app:elevation="someValue" is wrong, it does not hide the toolbar.The attribute app:elevation is used to show how much you want to make the toolbar or any other view that supports that attribute raised above the surface. Consider the surface as the floor on which the views are placed, now if you want to show some view like toolbar raised to other views you use that attribute.
if you want to make it transparent do it like this.
According to Material Design Guidelines, the elevation for appbar should be 4dp. So you should not set it to 0dp.

Use android:background="#null" instead of app:elevation="0dp".
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#null">
EDIT
You want to remove the shadow of the toolbar. To do that use app:elevation="0dp" only for appbar layout. Your code before revision shows you used for both toolbar and appbar. Remove it for toolbar.
UPDATE
I tested the code and the following code seemed to do the work.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="#drawable/testbg">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarMain"
app:elevation="0dp"
android:background="#null"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:background="#null"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
<!-- Rest of the code -->
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
</RelativeLayout>
OUTPUT IMAGE

Overlay on top of toolbar and fab

I want to achieve the following:
Overlay the whole activity with a LinearLayout that is currently not visible and revealed with a CircularReveal animation. It should then look like this. (Also, the Fab should be hidden beneath the semi transparent background of the overlay.)
The screenshot was taken from Android Studio's preview.
But instead it looks like this when testing on my phone.
The toolbar and the fab are above the overlay. I attached my layout below.
I know, I could also solve this with a new activity that is drawn over the previous one with a transparent theme but I would prefer this method as it is easier to work with in the future.
<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"
tools:context="com.jonas.gimmefood.MapsActivity">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/Theme.gimmefood.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/Theme.gimmefood.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
app:fabSize="normal"
android:elevation="2dp"
app:srcCompat="#drawable/ic_my_location_24dp" />
<!-- This is the overlay -->
<LinearLayout
android:id="#+id/overlay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:visibility="visible">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:background="#color/primary_dark"
android:orientation="vertical"
android:elevation="2dp">
<!-- elevation for the drop shadow -->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1">
<android.support.v7.widget.AppCompatEditText
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:layout_marginEnd="52dp"
android:layout_marginStart="4dp"
android:hint="#android:string/search_go" />
<android.support.v7.widget.AppCompatImageButton
android:id="#+id/toolbar_close_icon"
style="#style/Widget.AppCompat.Button.Borderless"
android:layout_width="42dp"
android:layout_height="42dp"
android:layout_gravity="end"
android:layout_marginEnd="4dp"
android:background="?selectableItemBackgroundBorderless"
android:src="#drawable/ic_close_24dp" />
</FrameLayout>
horizontal list view with all the circular buttons
...
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/background_transparent"/>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>

I solved it by using PopupWindow (reference here)

AppBarLayout scrolling content below Toolbar

I'd like to have a content area below my Toolbar. Its behavior should be to scroll while scrolling up and to enter immediately while scrolling down. Toolbar should stay on its place without any scrolling.
My layout is like that:
<?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:id="#+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.MainActivity">
<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" />
<RelativeLayout
android:id="#+id/box_search"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
app:layout_scrollFlags="scroll|enterAlways">
<TextView
android:id="#+id/text_search_filter"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Line 1"
android:textColor="#FFF" />
<TextView
android:id="#+id/text_search_category"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/text_search_filter"
android:text="Line 2"
android:textColor="#FFF" />
<TextView
android:id="#+id/text_search_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/text_search_category"
android:text="Line 3"
android:textColor="#FFF" />
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/ic_add_white_24dp" />
</android.support.design.widget.CoordinatorLayout>
If I put content area above Toolbar I am able to get the desired effect, but obviously it's in the wrong position.
If I put content area below Toolbar nothing scrolls...

If I put content area above Toolbar I am able to get the desired
effect, but obviously it's in the wrong position.
Of course it is in the wrong position since: http://www.google.com/design/spec/layout/structure.html#structure-app-bar
The app bar, formerly known as the action bar in Android, is a special
kind of toolbar that’s used for branding, navigation, search, and
actions.
So, you need to add a CollapsingToolbarLayout and the contents on it.
And:
I'd like to have a content area below my Toolbar. Its behavior should
be to scroll while scrolling up and to enter immediately while
scrolling down, Toolbar should stay on its place without any
scrolling.
To not to scrolling the Toolbar after adding that CollapsingToolbarLayout, you may want to add app:layout_collapseMode="pin" to that Toolbar.

Update:
Since my original suggestion did not work, another method to achieve the desired outcome would be to break out the Toolbar from the CoordinatorLayout. You can structure your layout XML as follows:
<?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">
<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.CoordinatorLayout
android:id="#+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="#style/AppTheme.AppBarOverlay">
<RelativeLayout
android:id="#+id/box_search"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
app:layout_scrollFlags="scroll|enterAlways">
<TextView
android:id="#+id/text_search_filter"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Line 1"
android:textColor="#FFF" />
<TextView
android:id="#+id/text_search_category"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/text_search_filter"
android:text="Line 2"
android:textColor="#FFF" />
<TextView
android:id="#+id/text_search_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/text_search_category"
android:text="Line 3"
android:textColor="#FFF" />
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main"
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_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/ic_add_white_24dp" />
</android.support.design.widget.CoordinatorLayout>
</LinearLayout>
If it's still not working, you should consider not using the include statement as this might be the source of the issues. Rather, bring in the layout definition directly into this layout and place under a NestedScrollView (apply app:layout_behavior="#string/appbar_scrolling_view_behavior" to this NestedScrollView). If you need additional help, post the contents of your content_main layout XML in your OP.
Original Response:
Make sure you define the app:layout_behavior for your main content, which defines that the scrolling of the main content should affect the AppBarLayout. Specifically, try this:
<include layout="#layout/content_main"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />

android:fitsSystemWindows not working on Toolbar

I'm using android library Android-ObservableScrollView from ksoichiro. I use his sample Flexible Space with viewpager and i modify it.
But there's some problem. You can see in my xml there is 2 android:fitsSystemWindows. One in LinearLayout, and the other in Toolbar. In LinearLayout working good. but in Toolbar is not working. Why this happen?
Thank you. Sorry for my bad english
theres my xml code:
<FrameLayout 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">
<com.github.ksoichiro.android.observablescrollview.TouchInterceptionFrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="#dimen/flexible_background"
android:scaleType="centerCrop"
android:src="#drawable/bridge" />
<View
android:id="#+id/overlay"
android:layout_width="match_parent"
android:layout_height="#dimen/flexible_background"
android:background="?attr/colorPrimary" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:fitsSystemWindows="true">
<FrameLayout
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="#dimen/flexible_height">
<TextView
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:layout_margin="#dimen/abc_action_bar_default_padding_material"
android:ellipsize="end"
android:gravity="center_vertical"
android:maxLines="1"
android:minHeight="?attr/actionBarSize"
android:textColor="#android:color/white"
android:textSize="20sp" />
</FrameLayout>
<com.bright.nongkrongyuk.ui.SlidingTabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#android:color/black"
app:sliding_textColor="#drawable/sliding_tab_profile" />
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/background_light" />
</LinearLayout>
</com.github.ksoichiro.android.observablescrollview.TouchInterceptionFrameLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/transparent"
android:minHeight="?attr/actionBarSize"
android:fitsSystemWindows="true" />
</FrameLayout>

The android:fitsSystemWindows attribute sets a padding. This means the fitting applies to the child views. You would have to apply this either to your FrameLayout or put the Toolbar into a nested Layout
It's really tricky to make a proper fullscreen layout with views fitted to the screen. I subclassed Fragment where I can declare a content-view which will get padding depending on Status- and/or Navigationbar