Develop Reference

How do I pin a View from a NestedScrollView at the bottom of the screen?

I have a RecyclewView and a button below it, it's all inside the NestedScrollView. If I add more items to the RecyclerView, the button will hide.
Is there a way to attach the button to the bottom of the screen if there are a lot of elements, and to the bottom of the RecyclerView if it fits on the screen?
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:itemCount="3"
tools:listitem="#layout/form_field" />
<Button
android:id="#+id/send_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Click me" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
It should be like this:

You can take that view out of the NestedScrollView. like this:
Here is the edited code, it will work perfectly.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.core.widget.NestedScrollView
android:id="#+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:itemCount="3"
tools:listitem="#layout/form_field" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<Button
android:layout_marginBottom="10dp"
android:id="#+id/send_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Click me" />
</LinearLayout>

Try to use a ConstraintLayout instead of LinearLayout.
Set the constraint of the button on the left, bottom, top and right of the screen in te XML file.

<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:fillViewport="true" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginTop="15px" >
<!-- bunch of components here -->
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="#+id/spinner"
android:layout_marginTop="5px"
android:gravity="center_horizontal|bottom"
android:paddingTop="2px" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20px"
android:paddingRight="20px"
android:text="Delete" />
</LinearLayout>
</RelativeLayout>

FrameLayout after ScrollView allways on bottom

I need to made layout that will contain ScrollView with some dynamic length text and Button in FrameLayout after(below). With long text all is okay, but when text is short button stuck right below bottom of ScrollView text part. I want a FrameLayout in the bottom of the screen when text is short and right below ScrollView text part when text long .
Can it be done?
My XML
<android.support.constraint.ConstraintLayout 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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".TeacherFullActivity"
tools:showIn="#layout/app_bar_teacher_full">
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
layout="#layout/listview_element_teachers"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/job_title"
style="#style/TitleMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/teacher_job_title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/job_dynamic"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/subject_title"
style="#style/TitleMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/teacher_subject_title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/subject_dynamic"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/workPlace_title"
style="#style/TitleMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/teacher_workplace_title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/workplace_dynamic"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingLeft="35dp"
android:paddingTop="5dp"
android:paddingRight="35dp"
android:paddingBottom="5dp">
<Button
android:id="#+id/teacher_external_link"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/btn_rounded"
android:text="#string/open_link"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:textSize="17sp"
android:textStyle="bold"
/>
</FrameLayout>
</LinearLayout>
</ScrollView>
</android.support.constraint.ConstraintLayout>

You can use the android:fillViewport attribute of ScrollView to accomplish this.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<FrameLayout
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:layout_gravity="bottom"/>
</FrameLayout>
</LinearLayout>
</ScrollView>
What this does is make it so that, in the case where the contents of the LinearLayout are not large enough to fill the screen, the LinearLayout is stretched to fill the screen anyway. That gives the FrameLayout room to grow (based on its layout_weight attribute), which in turn lets the Button float to the bottom of the screen (because of its layout_gravity attribute).
In cases where the contents of the LinearLayout are larger than the screen, no stretching happens. The button is pushed off-screen, but appears when you scroll down (with no space between it and the text).

You can try this code for your approach:
<android.support.constraint.ConstraintLayout 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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".TeacherFullActivity"
tools:showIn="#layout/app_bar_teacher_full">
<ScrollView
android:id="#+id/scrollview"
android:layout_width="0dp"
android:layout_height="0dp"
app:constraintTop_toTopOf="parent"
app:constraintStart_toStartOf="parent"
app:constraintEnd_toEndOf="parent"
app:constraintBottom_toTopOf="#id/frame">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
layout="#layout/listview_element_teachers"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/job_title"
style="#style/TitleMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/teacher_job_title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/job_dynamic"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/subject_title"
style="#style/TitleMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/teacher_subject_title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/subject_dynamic"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/workPlace_title"
style="#style/TitleMain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/teacher_workplace_title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/workplace_dynamic"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</LinearLayout>
</ScrollView>
<FrameLayout
android:id="#+id/frame"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:paddingLeft="35dp"
android:paddingTop="5dp"
android:paddingRight="35dp"
android:paddingBottom="5dp"
app:constraintTop_toBottomOf="#id/scrollview"
app:constraintStart_toStartOf="parent"
app:constraintEnd_toEndOf="parent"
app:constraintBottom_toBottomOf="parent">
<Button
android:id="#+id/teacher_external_link"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/btn_rounded"
android:text="#string/open_link"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:textSize="17sp"
android:textStyle="bold"
/>
</FrameLayout>
</android.support.constraint.ConstraintLayout>
Explaination:
What i did was took FrameLayout containing Button out side of ScrollView so that it can always be at bottom of the Container.

Linear Layout with Weights and Scroll View

I'm trying to create a responsive layout using weights but I also need to use a scroll view in this case.
This is my code at this moment:
<RelativeLayout 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"
tools:context=".EncyclopediaFragment">
<!--Linear Container-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="100">
<!--Title Box-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="20"
android:orientation="horizontal"
android:weightSum="100">
<!--Empty Space-->
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="5">
</LinearLayout>
<!--Text Box-->
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="95">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/encyclopedia_mosntersLabel"
android:gravity="center"
android:textAlignment="viewStart"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="40">
</LinearLayout>
</LinearLayout>
but it needs to be like this.
That layout is suppose to be responsive with weights but at the same time I need to make it possible to scroll.
So my question is: how can I create a layout responsive with weights and at the same time a layout that can scroll down, just like in the picture?

If you have a determined number of 6 Monsters and 8 Towers, here is how you should organize your layout:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Monsters"/>
<!-- the following LinearLayout should be repeated twice for 6 Monsters -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<MonsterView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<MonsterView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<MonsterView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
</LinearLayout>
...
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Towers"/>
<!-- the following LinearLayout should be repeated twice for 6 Towers -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TowerView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<TowerView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<TowerView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
</LinearLayout>
...
<!-- attention here for two Towers in the last row -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3">
<TowerView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<TowerView
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
</ScrollView>

The content inside your ScrollView should use wrap_parent, and if you want to stretch the content inside it set android:fillViewport="true". Try this:
<RelativeLayout 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"
tools:context=".EncyclopediaFragment">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--Linear Container-->
</RelativeLayout>
</ScrollLayout>
</RelativeLayout>

<RelativeLayout 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"
tools:context=".EncyclopediaFragment">
<!--Toolbar-->
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--Linear Container With Weights-->
</RelativeLayout>
</ScrollLayout>
</RelativeLayout>

LinearLayout position is shifting to up , When video is playing in Videoview

When the application is launched layout is fine. But when the video is playing. the Layout of the button is moving up.
How to resolve this?
When the application is launched?
When the video is playing the button is moving upwards
Below I had placed the layoutfile.xml which i had been working on.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:weightSum="1"
android:baselineAligned="false"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.3"
android:background="#android:color/background_dark">
<ListView
android:id="#+id/VideoList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/darker_gray"
android:foreground="#android:color/background_light" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1"
android:layout_weight="0.7">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.9"
android:layout_gravity="center_vertical">
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/videoView"
android:layout_gravity="center" />
</FrameLayout>
<Button
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.1"
android:text="New Button"
android:id="#+id/button"/>
</LinearLayout>
</LinearLayout>

You should make the LinearLayout(that contains FrameLayout and Button) height match_parent

No need for weight-sum, just make the layout_weights integers like 1 and 9 instead of 0.1 and 0.9
Also, fill_parent is deprecated, use match_parent instead.
You have a LinearLayout with single child. No need, just put ListView with same layout_params.
Lastly, your vertical LinearLayout on the right should have a height of match_parent.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:orientation="horizontal">
<ListView
android:id="#+id/VideoList"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3"
android:background="#android:color/darker_gray"
android:foreground="#android:color/background_light" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="7">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9"
android:layout_gravity="center_vertical">
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/videoView"
android:layout_gravity="center" />
</FrameLayout>
<Button
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:text="New Button"
android:id="#+id/button"/>
</LinearLayout>
</LinearLayout>
Edit: Fixed layout Params on LinearLayout.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:orientation="horizontal">
<ListView
android:id="#+id/VideoList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:background="#android:color/darker_gray"
android:foreground="#android:color/background_light" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="7">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9"
android:layout_gravity="center_vertical">
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/videoView"
android:layout_gravity="center" />
</FrameLayout>
<Button
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:text="New Button"
android:id="#+id/button"/>
</LinearLayout>
</LinearLayout>
I have done changes in listview "layout_width" and "layout_height" both should be match_parent ,Now it is working

Remove Strange Space between RecyclerView Items

I am newbie to android development and learning it to my own. I have a very strange problem of having strange space that comes in between every item of my recycler view. I have the following:
My recycler view is vertical with grid view layout of 2 spans(columns). What I have been trying is:
Code for Layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/size_five"
android:layout_marginRight="#dimen/size_five"
android:layout_marginTop="#dimen/size_fifteen"
android:background="#color/blackColor"
android:clickable="true"
android:focusable="true"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="50">
<ImageView
android:id="#+id/album_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/blackColor"
/>
</LinearLayout>
<LinearLayout
android:id="#+id/lowerline"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="15"
android:background="#color/hotpinkColor"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="4"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="#dimen/size_ten">
<TextView
android:id="#+id/album_title_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:gravity="left"
android:text="Album Title"
android:textColor="#color/whiteColor"
android:textSize="#dimen/size_eight"
android:textStyle="bold"/>
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginRight="#dimen/size_ten"
android:layout_weight="5"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/downloader"
android:layout_width="#dimen/size_thirty_six"
android:layout_height="#dimen/size_thirty_six"
android:layout_centerInParent="true"
android:src="#drawable/donwloaderimager"/>
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/setteraswall"
android:layout_width="#dimen/size_fourty"
android:layout_height="#dimen/size_fourty"
android:layout_centerInParent="true"
android:src="#drawable/setteras"/>
</RelativeLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
Screen Shot
The Black space is showing the extra strange space that I want to remove.

Change:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="50">
<ImageView
android:id="#+id/album_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/blackColor"
/>
</LinearLayout>
to
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="50">
<ImageView
android:id="#+id/album_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/blackColor"
/>
</LinearLayout>
That is change the height of the second parent linear layout to wrap_content