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RecyclerView get hidden under dynamic view in android

I have a RecyclerView in an xml and a LinearLayout at the bottom of that Activity. This activity works as a chat window where a question appears as the chat message and user gets some random multiple choice options in the view, but when the RecyclerView gets populated with a page full of data, I want to make that RecyclerView always above the layout where options are created, but what I have done so far does not work as expected, the RecyclerView data always gets hidden under the layout and each time I need to scroll down to see what's written there. I have used the method
adapter.notifyItemInserted(array.size());
recyclerView.scrollToPosition(array.size());
This adds item in the RecyclerViewand also scrolls down but it gets hidden under the layout, but I have set it always above the layout in the xml, I think the problem is I am creating some views dynamically in that layout which's size is wrap content, so the RecyclerView is not being updated time to time with the height of the layout in the bottom. Here is the xml code of that Activity
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/rlMain"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ChatBotActivity">
<include
android:id="#+id/header"
layout="#layout/header"></include>
<android.support.v7.widget.RecyclerView
android:id="#+id/rcv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/ll"
android:layout_below="#+id/header" />
<LinearLayout
android:id="#+id/ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="vertical"></LinearLayout>
<LinearLayout
android:id="#+id/ll2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:visibility="invisible"
android:weightSum="7">
<EditText
android:id="#+id/etMessage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="5"
android:hint="Type a message"
android:paddingLeft="#dimen/ten_dp"
android:textColorHint="#color/fade" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_gravity="center"
android:layout_marginRight="#dimen/five_dp"
android:layout_weight="2"
android:background="#android:color/transparent"
android:onClick="sendClick"
android:src="#drawable/ic_send_black_24dp"
android:text="send" />
</LinearLayout>
</RelativeLayout>
The RecyclerView is always above of the LinearLayout which id is ll but I am populating that layout from the java and it's height changes time to time, but RecyclerView height doesn't changed accordingly, please help!

Finally I myself solved the question, It was a funny mistake I was doing, the layout was all right, but my recylerview was just not scrolling, I had to change this:
Previous:
adapter.notifyItemInserted(array.size());
recyclerView.scrollToPosition(array.size());
Later:
adapter.notifyItemInserted(array.size()-1);
recyclerView.scrollToPosition(array.size()-1);

scroll ListView inside a LinearLayout which is wrapped in ScrollView

I have an activity which should be scrollable, therefore i surrounded it with a ScrollView. I have two listViews in there, which i do not want to be as large as it would be necessary to display all items.
It would be nice if i could set a maxHeight property, so that in case there are only 2 items no empty space would be present, but if there are 50 items i would only want to see like 5 of them at a time. Unfortunately there is no such property, so i decided to just set the height to a fixed number. Any advice how to do that more properly would be much appreciated.
However the main problem is that, when i try to scroll one of the listViews the whole LinearLayout scrolls down. (I can avoid this if i use another finger to 'hold' the LinearLayout in place while scrolling the list, but that certainly not a solution.)
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_settings"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="app.ballmaschine.pages.SettingsPage">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<!-- Some other stuff here -->
<TextView
android:text="Eine Maschine"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="#android:style/TextAppearance.DeviceDefault.Medium"
android:layout_marginTop="8dp" />
<ListView
android:layout_width="match_parent"
android:id="#+id/lvCalibsM1"
android:layout_height="200dp" />
<TextView
android:text="Zwei Maschinen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="#android:style/TextAppearance.DeviceDefault.Medium"
android:layout_marginTop="8dp" />
<ListView
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="#+id/lvCalibsM2"/>
<!-- Some more stuff here -->
</LinearLayout>

Add this to the ListView
android:scrollbars = "none"
and this in Java Code
listView.setNestedScrollingEnabled(false)

In these cases always try NestedScrollView and also add this line to it
app:layout_behavior="#string/appbar_scrolling_view_behavior"

RecyclerView item fills the whole screen

I have a Recyclerview which is working fine with the Android version 23 but if i am running the same code with the Android version 25 then the whole screen is occupied by the single item.
Initially the list looks fine where the item height is wrap content. But as i scroll the whole screen is occupied by single item.
Below is my layout containing RecyclerView:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/my_recycler_view"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:scrollbars="vertical" />
</LinearLayout>

Your Recyclerview code is ok.
if you are using TextView or else in your iteam_raw.xml then make sure you give
"wrap_content"
iteam_raw.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>

Please use recyclerview item's main layout height "wrap_content".

Make sure that the all UI element you are using in ViewHolder must have height to wrap content and if you are using cardview as parent container make that height also wrap_content.

change the layout_height property from match_parent to wrap_content or some size in your linearlayout.
example:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="120dp" <-- **change in height**
android:layout_width="match_parent"
android:orientation="vertical">

Set layout height and width to 0dp
<android.support.v7.widget.RecyclerView
android:id="#+id/my_recycler_view"
android:layout_height="0dp"
android:layout_width="0dp"
android:scrollbars="vertical" />

Setting maximum height on RecyclerView

I have a dialog fragment that contains linear layout that involves a titleText above a RecyclerView, and at the very bottom, there's a button below the recyclerView.
Since a recyclerView expands or collapses based on the number of items the adapter sets, the button sometimes gets truncated and no longer appears to be on screen, since the recyclerView just covers the entire screen.
My question is, is there a way to set the maximum height of the recyclerView without ever hiding the button underneath. I also don't want to just give the view a random height just in case the recyclerView contains no items, and it would just be a blank section.
Please let me know if you've ever run into this issue, and how you resolved this. Thanks!

UPDATED
You can achieve this easily using layout weights. Here's an example:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Title"
android:textSize="21sp"/>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="30dp">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:text="Submit"/>
</FrameLayout>
The Title and RecyclerView will wrap content according to contents and button will always take up bottom place.

I suggest using RelativeLayout as it handles the positioning of views for cases like yours, so that you can actually focus on main design.
<?xml version="1.0" encoding="utf-8"?>
<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">
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:text="Some title" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/title"
android:layout_above="#+id/button"/>
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:gravity="center"/>
</RelativeLayout>
Above XML code is the skeleton code for what you need. you can add margins and dimensions to control the spacing. But in any case (until you provide negative margins) your views will never overlap each other.
Main trick of using RelativeLayout is the ability to use XML tags like
android:layout_below or android:layout_above or android:layout_start
or android:layout_end which perfectly aligns your view the way you
want.

RecyclerView disappears when something else is added to the layout

I've got a tabbed viewpager, where swiping to the next page is disabled. The reason is, inside the fragment, I have a horizontal RecyclerView that should get the touch event.
Fragment XML :
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<TextView
android:layout_height="match_parent"
android:layout_width="match_parent"
android:text="Federal Representatives"
android:fontFamily="sans-serif-medium"
android:textSize="20sp"
android:paddingTop="15dp"
android:paddingLeft="15dp"
android:textColor="#000000"
xmlns:android="http://schemas.android.com/apk/res/android" />
<android.support.v7.widget.RecyclerView
android:id="#+id/federalPager"
android:scrollbars="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
The problem is this RecyclerView won't show up... unless I delete the TextView.
At that point it looks like this :
But If I keep them both, only the TextView shows up, but not the RecyclerView.
What am I missing?

Your TextView has this attribute:
android:layout_height="match_parent"
Which tells it to be as tall as the parent is... so that pushes the RecyclerView off the bottom... try changing it to wrap_content instead.