Develop Reference

How to add button to a view pager in Android Studio?

I want to add a button to a View Pager. Tried adding button, fragment, and layout without success.
I've also tried this:
Add button to ViewPager
But it didn't work.
This is my layout
<?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"
tools:context="com.airpal.yonatan.airpal.MainActivity_User">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/appBarLayout">
<include layout="#layout/app_bar_layout" android:id="#+id/main_page_toolbar" />
<android.support.design.widget.TabLayout
android:id="#+id/main_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabSelectedTextColor="#android:color/white"
app:tabTextColor="#android:color/white">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/main_tabPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/appBarLayout">
</android.support.v4.view.ViewPager>
</LinearLayout>
This is the screen shot, I want to add the button on the bottom of the page.
Thanks.

You can Wrap this LinearLayout in the Relative layout. If you don't want to change the Linear layout to RelativeLayout. Here is the modified layout XML and It will display Button the Bottom Right. You can modify layout_alignParentRight to left, center depend on your need.
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.airpal.yonatan.airpal.MainActivity_User">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/appBarLayout">
<include layout="#layout/app_bar_layout" android:id="#+id/main_page_toolbar" />
<android.support.design.widget.TabLayout
android:id="#+id/main_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabSelectedTextColor="#android:color/white"
app:tabTextColor="#android:color/white">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/main_tabPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/appBarLayout">
</android.support.v4.view.ViewPager>
</LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Submit"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"/>
</RelativeLayout>

Try using RelativeLayout for the root view and use :
android:layout_alignParentBottom="true"
With LinearLayout at root view is not possible. Also, instead of RelativeLayout, ConstraintLayout is a good alternative.

layout_anchor between toolbar and layout

I want a view to be anchored between AppBarLayout and layout. I get this behavior only on Android Studio editor, but on real device is different like so:
I am really confused. My code is:
<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="view.activity.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/bar_layout"
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:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="84dp"
android:layout_marginTop="#dimen/activity_vertical_margin">
<!--views on toolbar-->
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/activity_home_content" />
<RelativeLayout
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/circle_accent"
app:layout_anchor="#+id/whole_layout"
app:layout_anchorGravity="top|start">
<!--img view-->
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
and 'activity_home_content'
<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:id="#+id/whole_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="view.activity.MainActivity"
tools:showIn="#layout/activity_home_toolbar">
<!--some other views-->
</LinearLayout>

Just tried it. As I mentioned in the comments, your whole_layout is a LinearLayout with elevation 0dp. Any element you anchor to this LinearLayout will receive an elevation of 0dp (same as the view you are anchoring to) by default. This means that the RelativeLayout will have an elevation of 0dp.
The AppBarLayout has an elevation of 4dp, so by default the RelativeLayout will always be drawn below it.
The Fix
Give an elevation to the relative layout that is greater than or equal to 4. This will fix your problem, except that the RelativeLayout will now cast a shadow too.
Here is the code for the RelativeLayout
<RelativeLayout
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:background="#drawable/circle_accent"
app:layout_anchor="#+id/whole_layout"
app:layout_anchorGravity="top|start"
android:elevation="4dp">
<!--img view-->
</RelativeLayout>

Android - Prevent TabLayout's children from clipping Tab contents

The problem is simple. I have a TabLayout inside a CoordinatorLayout, and I dynamically set a CustomView for each Tab at runtime. The tabs have some animations and custom content that currently gets clipped at the Tab's edges.
I've set clipToPadding and clipChildren to false throughout all the view hierarchy with no success. Tabs are still getting clipped.
So the question is, how to avoid clipping tab's custom views inside a TabLayout?
Here's some code so you can see what I'm doing:
<?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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:clipChildren="false"
android:fitsSystemWindows="false"
tools:context=".MainTabbedActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:elevation="4dp"
android:clipToPadding="false"
android:clipChildren="false"
android:fitsSystemWindows="false"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:clipToPadding="false"
android:clipChildren="false"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
android:clipChildren="false"
app:tabPaddingBottom="-1dp"
app:tabPaddingEnd="-1dp"
app:tabPaddingStart="-1dp"
app:tabPaddingTop="-1dp"
app:tabIndicatorColor="#android:color/white"/>
</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.FloatingActionButton
android:id="#+id/fab"
... />
And then, a custom Tab looks like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:clipChildren="false"
android:clipToPadding="false"
android:layout_height="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="32dp"
android:scaleType="fitCenter"
android:layout_marginBottom="-4dp"
android:adjustViewBounds="true"
android:id="#+id/tab_pic" />
<TextView
android:id="#+id/tab_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/something"
android:textColor="#color/white"
android:textStyle="bold"
android:textSize="12sp"
android:visibility="invisible"/>
The result is the ImageView being clipped when animating its position/bounds.
Cheers

Ok, this was quick. I found the solution. It seems to me that Android creates an intermediate parent view between the TabLayout and the actual tab content.
So doing the following for each tab...:
ViewGroup realTabs = ((ViewGroup) mTabLayout.getChildAt(0));
realTabs.setClipToPadding(false);
realTabs.setClipChildren(false);
if (realTabs.getChildAt(0) instanceof ViewGroup) { // <-- This is the intermediate parent ViewGroup
((ViewGroup)realTab0.getChildAt(0)).setClipToPadding(false);
((ViewGroup)realTab0.getChildAt(0)).setClipChildren(false);
}
...will solve the problem.
Thanks

Where do I put my own xml code in activity_main using Androids default tab application

This is the activity_main.xml layout for Androids default tab application:
<?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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".activities.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
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"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
<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/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<!-- When I add my own view here and use match_parent, it fills ENTIRE screen, even over the Toolbar. The ViewPager right above does not do this. Why? -->
</android.support.design.widget.CoordinatorLayout>
I am trying to add my own buttons/textviews/etc to my activity_main.xml but I do not know where to add them. The android.support.v4.view.ViewPager uses match_parent although it does not fit the whole screen, it expands across the entire screen besides the Toolbar area at the top. However, whenever I add my own view underneath the android.support.v4.view.ViewPager, lets say RelativeView and set it to match_parent, it expands OVER the Toolbar. This led me to believe that I should put my contents inside the ViewPager tags but that does not work either.
Where should I put my views so that they are not overlapping the Toolbar?

You can wrap your ViewPager in an RelativeLayout and you can add the view child also.
Here is the code snippet which may help you-
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorAccent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="48dp"
android:text="I am clickable" />
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/button"
android:background="#color/colorNeutral"
android:layout_above="#+id/button2" />
<Button
android:layout_marginBottom="56dp"
android:layout_alignParentBottom="true"
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="48dp"
android:text="I am clickable too" />
</RelativeLayout>

ViewPager with Coordinator Layout

I have an activity layout that looks like the following:
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<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"
app:layout_scrollFlags="scroll|enterAlways"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary" />
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="match_parent" />
The viewpager has two fragments, one with a RecyclerView and one with a LinearLayout.
The fragment with RecyclerView works as expected and the action bar scrolls off screen when the RecyclerView is scrolled.
The other fragment with the LinearLayout isn't displaying as I would like it to however. The LinearLayout is drawn below the TabLayout and extends offscreen. I would like it to be resize to fill the space available below the TabLayout without extending offscreen. The LinearLayout looks like this:
<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">
<LinearLayout
android:id="#+id/station_detail_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
layout="#layout/station_detail_title"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3" />
<include
layout="#layout/station_detail_body"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2" />
</LinearLayout>
<TextView
android:id="#+id/text_view_station_detail_empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal|center_vertical"
android:text="#string/text_view_station_detail_empty"
android:visibility="gone" />
</LinearLayout>
Thanks for any help, much appreciated!

I think you need to add nested scroll view to your linearlayout.

Alex I thing you have to use two CoordinatorLayout in two fragment and you can include your linear layout inside it .