Develop Reference

Layout with tabs with ad on bottom and a button above it

I have created a layout with tabs
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout
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.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.CoordinatorLayout>
<com.google.android.gms.ads.AdView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
ads:adSize="SMART_BANNER"
ads:adUnitId="#string/ad_id"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true">
</com.google.android.gms.ads.AdView>
</RelativeLayout>
One of the tabs is
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/image_section"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/image"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/text"
android:gravity="center"/>
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:gravity="center"/>
</RelativeLayout>
The problem is that before the ad loads I can see the button all the way on the bottom. How would I make the layout for the tab to take up exactly the space available instead of the whole screen? Same way if I added a button and make it be on top, instead of appearing below the tabs, it appears all the way on the top.
EDIT: I would like to make it look like this image
The button is part of tab content that is shown and the ad is part of the main layout. The problem is that whenever I set button to android:layout_alignParentBottom="true" then I end up with it being on the bottom and hidden behind the ad.

Change the root of your main layout to vertical LinearLayout instead of RelativeLayout.
Now you have two children in LinearLayout i.e CoordinatorLayout and AdView.
Since you want AdView to lie below CoordinatorLayout and CordinatorLayout to occupy the rest of the space,
set the height of CoordinatorLayout as android:layout_height="match_parent" with android:layout_weight="1" and the issue should be fixed.
Also change the height of AppBarLayout and TabLayout to match_parent.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.CoordinatorLayout>
<com.google.android.gms.ads.AdView
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_gravity="center"
ads:adSize="SMART_BANNER"
ads:adUnitId="#string/ad_id">
</com.google.android.gms.ads.AdView>
</LinearLayout>
There is no need to change in the other layout. But I would recommend you use LinearLayout as the root layout instead of RelativeLayout
So here are the changes that I would recommend doing in your tab layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:id="#+id/image_section"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/image"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/text"
android:gravity="center"/>
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:layout_centerHorizontal="true"
android:gravity="center"/>
</LinearLayout>
Edit: Attaching images for better understanding:

Have You tried setting minHeight in Your AdView?
Change your Tab layout to this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/image_section"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/image"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/text"
android:gravity="center"/>
<View
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:gravity="center"/>
</LinearLayout>

Content inside NestedScrollview is pushed down

I have a screen contain collapsable toolbar (AppBarLayout) and scrollable content with NestedScrollviews
My Main layout:
<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="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:theme="#style/ToolbarTheme"
android:layout_width="match_parent"
android:layout_height="#dimen/actionBarHeight"
android:background="#color/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
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:fillViewport="true"
android:scrollbars="none"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<FrameLayout
android:id="#+id/layoutMainContent"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
And the layout content that I put into FrameLayout layoutMainContent is as below
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorBackground">
<LinearLayout
android:id="#+id/layoutAbout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_centerInParent="true">
<ImageView
android:id="#+id/ivLogo"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center_horizontal"
android:src="#drawable/logo"/>
</LinearLayout>
<TextView
android:id="#+id/tvViewDetail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:textColor="#color/colorPrimary"
android:text="#string/see_license"
android:gravity="center_horizontal"/>
</RelativeLayout>
What I want is the logo image is in the center and the TextView (tvViewDetail) is at the bottom the the screen. However, logo image is not in the center (pushed down a little bit) and tvViewDetail is pushed out of the screen.
Is there anything I've done wrong? Any suggestion would be helpful!
Thank you all masters,

Try this way I hope it helps.
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorBackground">
<LinearLayout
android:id="#+id/layoutAbout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_centerInParent="true">
<ImageView
android:id="#+id/ivLogo"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#drawable/logo"/>
<TextView
android:id="#+id/tvViewDetail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/colorPrimary"
android:text="#string/see_license"/>
</LinearLayout>
</RelativeLayout>
hence linearlayout height and width will be wrap_content and gravity will be center so all child of that linear layout will be at center of the linear layout. and linear layout also appear at the center of the relative layout.

Fragment container layout overlapping main activity contents

I am trying to add a custom header in my main activity that already contains a bottom navigator and a framelayout that acts as a container for the fragments i want to display.
The below given code contains a Linearlayout["#+id/application_header] that should act as the application header, however the header is displayed by the fragment container[#+id/main_container] is overlapping the header.
Tried the properties android:layout_below and android:layout_above but it is still overlapping.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:design="http://schemas.android.com/apk/res-auto"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.amplitude.tron.volksradio.MainActivity">
<LinearLayout
android:id="#+id/application_header"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
android:gravity="center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RADIO"
android:layout_gravity="center"/>
</LinearLayout>
<FrameLayout
android:id="#+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/application_header"
android:layout_above="#+id/bottomNavigationBar"
android:layout_alignParentTop="true">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
design:menu="#menu/bottom_menu_navigation"
android:background="#50b1b5b9">
</android.support.design.widget.BottomNavigationView>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/application_header"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
android:gravity="center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RADIO"
android:layout_gravity="center"/>
</LinearLayout>
<FrameLayout
android:id="#+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/application_header"
android:layout_above="#+id/bottomNavigationBar"
android:layout_alignParentTop="true">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
design:menu="#menu/bottom_menu_navigation"
android:background="#50b1b5b9">
</android.support.design.widget.BottomNavigationView>
</LinearLayout>

android:layout_below and android:layout_above work with RelativeLayout. BTW, the LinearLayout with only one TextView is redundant. You can just use TextView. Here are some options on how to get that done.
Using RelativeLayout:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:design="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/application_header"
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="RADIO"/>
</LinearLayout>
<FrameLayout
android:id="#+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/bottomNavigationBar"
android:layout_alignParentTop="true"
android:layout_below="#id/application_header">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#50b1b5b9"
design:menu="#menu/bottom_menu_navigation">
</android.support.design.widget.BottomNavigationView>
</RelativeLayout>
Using LinearLayout:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:design="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/application_header"
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="RADIO"/>
</LinearLayout>
<FrameLayout
android:id="#+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#50b1b5b9"
design:menu="#menu/bottom_menu_navigation">
</android.support.design.widget.BottomNavigationView>
</LinearLayout>
One more (better) alternative would be using CoordinatorLayout with Toolbar:
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:design="http://schemas.android.com/tools">
<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>
<FrameLayout
android:id="#+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/application_header"
android:layout_above="#+id/bottomNavigationBar"
android:layout_alignParentTop="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
design:menu="#menu/bottom_menu_navigation"
android:background="#50b1b5b9"/>
</android.support.design.widget.CoordinatorLayout>

Solved it my self, although there might other clean solution and would be accepted as answer if found feasible.
I just added android:layout_marginTop="50dp" which is same as the height of element with id - #+id/application_header
PS- i don't know if this would effect screens with different sizes and my testing device is only 5.5 inches to which the solution worked perfectly.

You can also make the layout align center of the screen by adding this :
android:layout_centerInParent="true"
also add a padding or margin incase there is any small amount of overlapping

How to put button on the bottom of Scrollview

I've tried searching all over, but I can't seem to figure this one out. Basically, I have a layout with Scrollview and elements inside it. I want to put a button inside the scrollview which would be at the end/bottom and you can only see it when you scroll all the way to the bottom.
I've tried doing it like this:
<ScrollView 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="wrap_content"
android:fitsSystemWindows="true"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/topcontainer">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar_review"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:title="Review Your Massage">
</android.support.v7.widget.Toolbar>
<include layout="#layout/card_review"/>
</LinearLayout>
<Button
android:id="#+id/buttonReview"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="#color/colorAccent"
android:text="#string/book"
android:layout_below="#+id/topcontainer"
/>
</RelativeLayout>
</ScrollView>
The button is indeed at the bottom but there is space beneath it. If I run the app on a phone with bigger resolution, the button will be almost in the middle of the screen. How can I make it so no matter the resolution it will always stay on bottom?
Here's a screenshot of what it looks like at the moment:

With android:layout_height="match_parent" and android:fillViewport="true" the ScrollView uses all the available space, even if the children are smaller.
The Space has a android:layout_weight="1" to receive the extra space, so the button is always at the bottom.
An explanation by Romain Guy with more details.
<ScrollView 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:fillViewport="true"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/topcontainer">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar_review"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:title="Review Your Massage">
</android.support.v7.widget.Toolbar>
<include layout="#layout/card_review"/>
<android.support.v4.widget.Space
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="0dp" />
<Button
android:id="#+id/buttonReview"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#color/colorAccent"
android:text="#string/book" />
</LinearLayout>
</ScrollView>

try this
<ScrollView 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:fillViewport="true"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="#+id/topcontainer">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar_review"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:title="Review Your Massage">
</android.support.v7.widget.Toolbar>
<include layout="#layout/card_review"/>
</LinearLayout>
<Button
android:id="#+id/buttonReview"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="#color/colorAccent"
android:text="#string/book"
/>
</RelativeLayout>
</ScrollView>

Coordinator layout shifts content at the height of a AppbarLayout

After including Coordinator layout in my project I have a problem. I'll post my layout.
Here is my main_layout.xml:
<android.support.design.widget.CoordinatorLayout
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/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"/>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:id="#+id/frame_content_keeper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Top Text"/>
</LinearLayout>
<LinearLayout
android:id="#+id/login_buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Bottom text"/>
</LinearLayout>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
I don't see textview with 'Bottom text'. Looks like it under screen. I think it is a defect.

It's normal because you should remove this line
app:layout_scrollFlags="scroll|enterAlways"
from your
android.support.v7.widget.Toolbar
This attribute is for when you have a list and when you will scroll down the action bar will hiding