Develop Reference

Margin to the scrollbar only (not to recyclerview) on recyclerview

My recycler view lies under my toolbar, as you can see from the first picture. However, I have a scrollbar on the right side of it. I have to give a margin-top to this scrollbar. I have tried with giving style. And I know about clip padding with padding-top and padding-bottom, however, I need this exactly. Are there any ways to make it real?
This is my problem
The result that I want
P.S. I know that it is not the best practice. I would appreciate any help. It is one of my first questions, don't judge me so strong. :)
My main XML file
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:background="?attr/background1"
android:keepScreenOn="true"
tools:context=".ui.main.HomeActivity">
<androidx.viewpager.widget.ViewPager
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/pager" />
<include layout="#layout/toolbar_sura_detail" />
<include layout="#layout/player" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
My Fragment XML inside ViewPager
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="?attr/background1">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/kuranDetailList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:isScrollContainer="false"
android:fitsSystemWindows="true"
android:scrollbarSize="2dp"
android:scrollbarThumbVertical="#drawable/thumbforrecycle"
android:scrollbars="vertical"
android:orientation="vertical" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>

Try using this structure in your main XML and add scrolling layout behaviour for ViewPager
<androidx.coordinatorlayout.widget.CoordinatorLayout...
<com.google.android.material.appbar.AppBarLayout...
<androidx.appcompat.widget.Toolbar...
</com.google.android.material.appbar.AppBarLayout>
<androidx.viewpager.widget.ViewPager
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/pager"
app:layout_behavior = "com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"/>

How to make view container above Viewpager "scrollable" (Toolbar is inside Activity, not Fragment)?

I have fragment, which doesn´t cointains toolbar. Toolbar must stay in activity. This fragment must show main view and bellow viewpager with two fragments. Each fragment is specific. First use custom layout, second use adapter. Each has different height. I tried a lot of libs and ideas, but none of them works as it should (it made scroll longer/shorter than it should or it made crazy UI overlays).
I am trying to do UI where it looks that this all is one layout, meaning, it is scrollable from up to bottom. But I can´t figure it out. I was thinking to use CoordinatorLayout, but I have no idea how.
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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="#FF0000"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ABCDEFGH" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="GHIKJ" />
</LinearLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
How to make this as scrollable layout in fragment without using toolbar references?
Update: Yes, here are some pictures, I hope it is more clear now.

Wrap your LinearLayout inside an AppBarLayout. Actually AppBarLayout extends LinearLayout so you could just replace your LinearLayout with it.
Even if your app doesn't have a toolbar or an app bar, the AppBarLayout is the view that CoordinatorLayout coordinates with.
Adding the AppBarLayout should provide the behavior you're looking for.

This root fragment layout seems to working. I am not sure that this is best solution, but it works.
Note: I replaced listview by standard LinearLayout as root container and inflate child layouts (items) there.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
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:layout_width="match_parent"
android:layout_height="250dp"
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|enterAlways">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
Child fragment (for viewpager):
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/childFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"/>
</android.support.v4.widget.NestedScrollView>

BringToFront of the custom view inside a coordinator layout

Actually there is already similar question
BringToFront doesn't work inside a coordinator layout
However no of suggestions helped me to make bringToFront work within a coordinatorlayout.
Here is the layout-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:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="#layout/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/main_content_container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<fragment
android:id="#+id/navigation_drawer_container"
android:name="..."
android:layout_width="#dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"/>
</android.support.v4.widget.DrawerLayout>
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/..."
android:clickable="true"
android:layout_gravity="bottom|end"
android:layout_marginRight="20dp"
android:layout_marginBottom="60dp"
app:borderWidth="0dp"/>
<CustomView
android:id="#+id/customview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:orientation="vertical"
android:visibility="gone"
app:layout_behavior="..."/>
</android.support.design.widget.CoordinatorLayout>
The custom view is inherited from FrameLayout. It can change its height.
To bring the custom view to the front first I tried to add:
mCustomView.bringToFront();
Then
mCustomView.requestLayout();
mCustomView.invalidate();
Finally also
((View)mCustomView.getParent()).requestLayout();
But without success. The button is still on the top.
Did I missed anything?
Maybe there other possibilities to bring the custom view to front or to put the button under custom view?
I also tried to add a behaviour to the button, but since it's visibility depends not only on the custom view I thrown this approach away.
Thank you for any help in advance.

I finally found a workaround - if I set setEnabled(false) on the AppBar, it goes to the background and I can draw other stuff over it regardless of API level.

Toolbar expanding on clicking EditText view

I have implemented material navigation drawer and toolbar in MainActivity. For implementing the navigation drawer and to ensure it shows up behind the status bar I have used following code for toolbar.xml
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/primaryColor"
android:fitsSystemWindows="true"
android:theme="#style/ToolbarTheme">
</android.support.v7.widget.Toolbar>
and included this in activity_main.xml as follows:
<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/navigation_drawer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
........
in styles.xml I am using following attribute,
<item name="android:windowTranslucentStatus">true</item>
With this everything is working just fine and I get the following result,
The problem occurs when i click on the edit text view (00.00). The moment that edit text view or any edit text view in the page is clicked, the toolbar just expands. See image below:
Now, I was able to rectify the issue by placing android:fitsSystemWindows="true" in activity_main.xml as follows:
<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/navigation_drawer"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:layout_height="match_parent">
........
My question is, though this solution works but I am not sure as to why do I have to use the same attribute twice in layout file? And what made the toolbar expand? Also, is this the right approach to tackle this issue?
Edit - Removing android:fitsSystemWindows="true" from toolbar.xml and placing it in drawer layout results in the main activity yielding correct results but other activities have a white bar. See image below.

I had the same problem that you and I will tell you what I did for fix it
1) Defining the toolbar.xml
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolBarDetalleContacto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="4dp"
android:background="?attr/colorPrimary"
android:fitsSystemWindows="true"
app:layout_collapseMode="pin"
app:theme="#style/Theme.GpsFriends.Material">
</android.support.v7.widget.Toolbar>
The trick is to use this attribute in your activity xml inside a <android.support.v4.widget.DrawerLayout> parent component and set here the property android:fitsSystemWindows="true" (also in your toolbar.xml). If you dont use DrawerLayout the permanent grey color in your colorPrimaryDark attribute wont be change, will be always grey and just grey.
2) Defining your activity xml:
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:fitsSystemWindows="true"
tools:context="com.wherefriend.activities.agregaramigos.AgregarAmigosActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="#+id/toolbar_main_gps_friends"
layout="#layout/toolbar_gps_friends"
></include>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="#+id/bBuscar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:onClick="buscarAmigos"
android:text="Buscar" />
<EditText
android:id="#+id/etfragmentCorreo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_toLeftOf="#+id/bBuscar"
android:ems="10"
android:inputType="textEmailAddress" />
</RelativeLayout>
<ListView
android:id="#+id/listaResultado"
android:divider="#drawable/horizontal_linear_layout_divider"
android:dividerHeight="0dp"
android:layout_width="match_parent"
android:layout_height="fill_parent" >
</ListView>
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
As you can see, I defined first child activity xml UI as DrawerLayout but just below I use <LinearLayout> to include my whole User interface View compontents. At first my Toolbar and then the rests of the components.
The result is like that, testing in a real Nexus 4 - LG API versión 22:

ScrollView as a first element in Navigation Drawer

I'm trying to create a navigation drawer that looks like google play store. What I've noticed in google play store drawer is that it's scrollable top to bottom (not only the listview). I managed to create a beautiful drawer that opens and closes correctly. But when I use a scrollview as a first element in drawer layout, navigation drawer glitches and shows up always on the screen as a scattered layout.
I use this code (I removed scrollview content for clarity, plus, even just one LinearLayout with 2-3 simple buttons in it, is enough to show the glitch, so it's irrelevant):
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Main Layout -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:orientation="vertical"
android:id="#+id/screen"
android:layout_height="wrap_content"
tools:context=".Intro"
android:weightSum="1">
</LinearLayout>
<!-- Drawer Layout -->
<ScrollView
android:layout_width="270dp"
android:layout_height="match_parent">
....
....
...
</ScrollView>
Note that I used fixed height elements in the scroll view, and also removed ALL the listviews & expandable list views (views with auto scrolling) without any luck.

I used navigation drawer as following:
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<fragment android:id="#+id/navigation_drawer"
android:layout_width="#dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="left"
android:name="com.xxx.NavigationDrawerFragment"
tools:layout="#layout/fragment_navigation_drawer"/>
</android.support.v4.widget.DrawerLayout>
And inside the fragment layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#color/white"
tools:context=".com.xxx.NavigationDrawerFragment">
<ScrollView
android:id="#+id/list_drawer_menu"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>