Develop Reference

How to set guidelines to the original screen size inside scrollview

I just started app development trying to make an e-commerce app since using fragments is a better way rather than activities I made a home page inside which I want to show first the action bar then top-selling (top-4 selling products) and after that all the products.
this is some i want to achieve
image
I am using guideline to constraint view pager to limited section but since its a fragment its not scrollable so i have to set it to scrollable but the second I set it to scroll view the size of screen increase and the view pager gets distorted.
code of my home fragment without scroll view
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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=".home.HomeFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<include
android:id="#+id/home_actionbar"
layout="#layout/actionbar"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"/>
<com.google.android.material.textview.MaterialTextView
android:id="#+id/top_selling_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="15sp"
android:layout_marginTop="15sp"
android:text="#string/top_selling_heading"
android:textSize="14sp"
app:fontFamily="#font/roboto_bold"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/home_actionbar" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.45"
app:layout_constraintTop_toBottomOf="#id/top_selling_heading" />
<androidx.viewpager.widget.ViewPager
android:id="#+id/top_seller_vp"
android:layout_width="0dp"
android:layout_height="0dp"
android:padding="5sp"
android:layout_margin="15sp"
android:clipToPadding="false"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/top_selling_heading"
app:layout_constraintBottom_toTopOf="#id/guideline2"
app:layout_constrainedHeight="true" />
<TextView
android:id="#+id/product_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/guideline2"
app:layout_constraintStart_toStartOf="#id/top_selling_heading"
app:layout_constraintEnd_toEndOf="#id/top_selling_heading"
android:text="#string/all_products_heading"
android:textSize="20sp"
android:fontFamily="#font/roboto_bold"/>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/productRV"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:scrollbars="vertical"
app:layout_constraintTop_toBottomOf="#id/product_heading"
android:layout_margin="10sp"
tools:listitem="#layout/product_item"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
is there any other way to achieve this. please help fast..

try using LinearLayout inside scrollView(Copy and paste)
<FrameLayout 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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/home_actionbar"
layout="#layout/actionbar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<com.google.android.material.textview.MaterialTextView
android:id="#+id/top_selling_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="15sp"
android:layout_marginTop="15sp"
android:text="#string/top_selling_heading"
android:textSize="14sp"
app:fontFamily="#font/roboto_bold"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/home_actionbar" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.45"
app:layout_constraintTop_toBottomOf="#id/top_selling_heading" />
<androidx.viewpager.widget.ViewPager
android:id="#+id/top_seller_vp"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_margin="15sp"
android:clipToPadding="false"
android:padding="5sp"
app:layout_constrainedHeight="true"
app:layout_constraintBottom_toTopOf="#id/guideline2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/top_selling_heading" />
<TextView
android:id="#+id/product_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/roboto_bold"
android:text="#string/all_products_heading"
android:textSize="20sp"
app:layout_constraintEnd_toEndOf="#id/top_selling_heading"
app:layout_constraintStart_toStartOf="#id/top_selling_heading"
app:layout_constraintTop_toBottomOf="#id/guideline2" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/productRV"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="10sp"
android:scrollbars="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/product_heading"
tools:listitem="#layout/product_item" />
</LinearLayout>
</ScrollView>
</LinearLayout>
</FrameLayout>

How to not move the layout upwards when soft keyboard is opened

I know this might seem like a duplicate question, in fact I have already referred to these questions here and here, but none of these seem to work for me, so here I am .
My layout has two primary sections in it : a live video feed and a chat box below it, what happens is that whenever I open the keyboard it shifts my video section and the appbar upwards and out of the screen, and I want he video section to stay as it is , I have tried many things like different layouts, windowSoftInputMode, but none helped.
Here Is my Layout :
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/linearLayout7">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
app:layout_constraintBottom_toBottomOf="#+id/constraintLayout2" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/constraintLayout2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_gravity="bottom"
android:layout_weight="1"
android:orientation="vertical"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#+id/linearLayout3">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.core.widget.NestedScrollView
android:id="#+id/tscroll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="42dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/show_chat"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.core.widget.NestedScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout3"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#drawable/chatbox"
android:weightSum="3"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<EditText
android:imeOptions="flagNoExtractUi"
android:id="#+id/textmassge"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2.2"
android:autofillHints=""
android:hint="#string/enter_message"
android:inputType="text"
android:textColor="#color/colorPrimary"
android:textColorHint="#color/colorSelect"
android:textSize="20sp" />
<ImageView
android:id="#+id/attach"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.4"
android:background="#android:color/transparent"
android:onClick="choose_file"
android:padding="13dp"
android:src="#drawable/attachment"
android:tint="#color/colorAccent" />
<ImageView
android:id="#+id/send_button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.4"
android:background="#android:color/transparent"
android:onClick="sendmessage"
android:padding="13dp"
android:src="#drawable/send"
android:tint="#color/colorAccent" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
<!--GLSurface View Starts-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/linearLayout7">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/mainlayout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
app:layout_constraintBottom_toBottomOf="#+id/constraintLayout2">
<android.opengl.GLSurfaceView
android:id="#+id/cameraPreview_surfaceView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

View is overlapped by another view in NestedScrollView with ConstrainLayout

I have the following layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.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">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/content_ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/margin_32"
android:orientation="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.cardview.widget.CardView
android:id="#+id/online_card_cv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="#dimen/margin_16"
android:layout_marginTop="#dimen/margin_25"
android:background="#color/white"
app:cardCornerRadius="#dimen/margin_8">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginVertical="#dimen/margin_8">
<androidx.appcompat.widget.AppCompatRadioButton
android:id="#+id/online_card_rb"
android:layout_width="#dimen/margin_22"
android:layout_height="#dimen/margin_22"
android:layout_marginStart="#dimen/margin_16"
app:layout_constraintBottom_toBottomOf="#id/online_card_ll"
app:layout_constraintEnd_toStartOf="#id/online_card_ll"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#id/online_card_ll" />
<LinearLayout
android:id="#+id/online_card_ll"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_16"
android:background="#color/white"
android:gravity="start"
android:orientation="vertical"
android:paddingVertical="#dimen/padding_16"
app:layout_constraintEnd_toStartOf="#id/cards_iv"
app:layout_constraintStart_toEndOf="#id/online_card_rb"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/online_card_tv"
style="#style/OnlineCardTitleTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/online_card_title"
app:lineHeight="#dimen/default_text_size_28" />
<androidx.appcompat.widget.AppCompatTextView
style="#style/OnlineCardSubTitleTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/online_card_now" />
</LinearLayout>
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/cards_iv"
android:layout_width="#dimen/margin_80"
android:layout_height="#dimen/margin_20"
android:layout_marginEnd="#dimen/margin_16"
android:src="#drawable/ic_visa_master"
app:layout_constraintBottom_toBottomOf="#id/online_card_ll"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="#id/online_card_ll" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/online_card_expanded_info_cl"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="gone"
app:layout_constraintTop_toBottomOf="#id/online_card_ll">
<View
android:id="#+id/online_card_divider"
style="#style/ViewDividerStyle"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="#dimen/margin_16"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/cards_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/online_card_divider" />
<View
android:id="#+id/cards_list_divider"
style="#style/ViewDividerStyle"
android:layout_width="match_parent"
android:layout_height="1dp"
app:layout_constraintTop_toBottomOf="#id/cards_list" />
<TextView
android:id="#+id/read_more_tv"
style="#style/OnlineCardReadMoreTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_16"
android:layout_marginTop="#dimen/margin_16"
android:layout_marginBottom="#dimen/margin_8"
android:text="#string/read_more"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/cards_list_divider" />
<LinearLayout
android:id="#+id/additional_info_ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_21"
android:layout_marginTop="#dimen/margin_16"
android:layout_marginEnd="#dimen/margin_10"
android:layout_marginBottom="#dimen/margin_8"
android:orientation="vertical"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/cards_list_divider">
<TextView
android:id="#+id/online_card_less_info_tv"
style="#style/OnlineCardReadMoreTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/online_card_less_info" />
<TextView
android:id="#+id/check_card_type_title_tv"
style="#style/OnlineCardBottomTitleTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/margin_4"
android:text="#string/online_check_card" />
<TextView
android:id="#+id/check_card_type_info_tv"
style="#style/OnlineCardBottomDescriptionTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_8"
android:layout_marginTop="#dimen/margin_4"
android:text="#string/online_check_card_info" />
<TextView
android:id="#+id/online_card_data_title_tv"
style="#style/OnlineCardBottomTitleTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/margin_4"
android:text="#string/online_card_data" />
<TextView
android:id="#+id/online_card_data_info_tv"
style="#style/OnlineCardBottomDescriptionTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_8"
android:layout_marginTop="#dimen/margin_4"
android:text="#string/online_card_data_info" />
<TextView
android:id="#+id/online_card_confirmation_title_tv"
style="#style/OnlineCardBottomTitleTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/margin_4"
android:text="#string/online_card_confirmation" />
<TextView
android:id="#+id/online_card_confirmation_info_tv"
style="#style/OnlineCardBottomDescriptionTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_8"
android:layout_marginTop="#dimen/margin_4"
android:text="#string/online_card_confirmation_info" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:id="#+id/bank_account_cv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="#dimen/margin_16"
android:layout_marginTop="25dp"
android:background="#color/white"
app:cardCornerRadius="#dimen/margin_8">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginVertical="#dimen/margin_24">
<androidx.appcompat.widget.AppCompatRadioButton
android:id="#+id/bank_account_rb"
android:layout_width="#dimen/margin_22"
android:layout_height="#dimen/margin_22"
android:layout_marginStart="#dimen/margin_16"
app:layout_constraintBottom_toBottomOf="#id/bank_account_tv"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#id/bank_account_tv" />
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/bank_account_tv"
style="#style/OnlineCardTitleTextStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_14"
android:text="#string/title_on_bank"
android:textAlignment="textStart"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/bank_account_rb"
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="#+id/bank_account_divider"
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginTop="#dimen/margin_16"
android:alpha="0.5"
android:background="#000001"
app:layout_constraintTop_toBottomOf="#id/bank_account_tv" />
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/iban_hint_tv"
style="#style/OnlineCardEditTextHintTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/margin_16"
android:layout_marginTop="15dp"
android:text="#string/step7_iban_hint"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/bank_account_divider" />
<androidx.appcompat.widget.AppCompatEditText
android:id="#+id/step1_phone"
android:layout_width="match_parent"
android:layout_height="#dimen/height_edittext"
android:layout_marginHorizontal="#dimen/margin_16"
android:layout_marginTop="#dimen/margin_2"
android:background="#drawable/rounded_edittext_with_border"
android:maxLines="1"
app:layout_constraintTop_toBottomOf="#id/iban_hint_tv" />
<androidx.constraintlayout.widget.Group
android:id="#+id/group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
app:constraint_referenced_ids="step1_phone, iban_hint_tv, bank_account_divider" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
<androidx.appcompat.widget.AppCompatButton
android:id="#+id/step7_next_btn"
android:layout_width="#dimen/width_button_next"
android:layout_height="#dimen/height_button_next"
android:layout_marginBottom="#dimen/margin_10"
android:background="#drawable/rounded_button_next"
android:text="#string/next"
android:textColor="#color/button_text_green"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
When the part of the view has gone visibility, my screen looks like this:
As you can see, button is placed in the bottom and it's not overlapped by any other views. But when card is expanded, it looks like this:
As you can see, now button overlaps another card, and I need to place button under the card. So, how can I prevent existing behavior and place the button under all cards in the bottom? Thanks in advance, I will appreciate any help!

See below for an updated answer.
Old
I don't see the purpose of ConstraintLayout. You can remove that and place the button as last item in LinearLayout. The XML would then be like:
NestedScrollingView
LinearLayout
CardView ...
CardView ...
AppCompatButton
You can also use ConstraintLayout instead of LinearLayout, but I don't see the need for both.
This introduces a problem: the button is not at the bottom, when the content does not fill out the screen. For an easy fix, you can use ConstraintLayout with appropriate constraints.
New
I suggest you to use a ConstraintLayout. With it, you can achieve a flat layout hierarchy. You can use chains and vertical bias as such:
Chain the first card to the top of your parent
Chain the button to the bottom of your parent
Chain the second card to the bottom of the first card and to the top of the button. Apply a vertical bias of 0.0.
The result:
And the simple code for the example:
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.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:background="#dddddd"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.cardview.widget.CardView
android:id="#+id/card1"
android:layout_width="0dp"
android:layout_height="200dp"
android:layout_margin="16dp"
app:cardCornerRadius="8dp"
app:cardElevation="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="First card" />
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:id="#+id/card2"
android:layout_width="0dp"
android:layout_height="800dp"
android:layout_margin="16dp"
app:cardCornerRadius="8dp"
app:cardElevation="8dp"
app:layout_constraintBottom_toTopOf="#id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/card1"
app:layout_constraintVertical_bias="0.0">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Second card" />
</androidx.cardview.widget.CardView>
<androidx.appcompat.widget.AppCompatButton
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="64dp"
android:layout_marginBottom="16dp"
android:background="#ffffff"
android:text="Button text"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintWidth_percent="0.5" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>

RecyclerView loads all items at once, causing Application Not Responding error

I have a Layout with structure of following :
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".Activites.Settings.ContactsActivity">
<FrameLayout
android:id="#+id/fl_contacts"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tv_mirriom_contacts">
</FrameLayout>
some other widgets
</androidx.constraintlayout.widget.ConstraintLayout>
in this frameLayout I show a fragemnt that contains a recyclerView.
i am going to scroll all layout not just recyclerView.
so i implemented this structure
<androidx.constraintlayout.widget.ConstraintLayout >
<NestedScrollView>
<androidx.constraintlayout.widget.ConstraintLayout >
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
/>
Other widgets
</androidx.constraintlayout.widget.ConstraintLayout >
</NestedScrollView>
</androidx.constraintlayout.widget.ConstraintLayout >
in this mode scrolling is right but all items of recycler load together and cause app not responding
this is my fragment
<androidx.constraintlayout.widget.ConstraintLayout 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"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".Activites.Event.Fragments.MirriomContactsFrag">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_contact"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:scrollbars="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
tools:listitem="#layout/item_user" />
</androidx.constraintlayout.widget.ConstraintLayout>
Edit
my fragment xml :
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".Activites.Event.Fragments.MirriomContactsFrag">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_contact"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:scrollbars="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
tools:listitem="#layout/item_user" />
</androidx.constraintlayout.widget.ConstraintLayout>
main activity:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".Activites.Settings.ContactsActivity">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/fl_contacts"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tv_mirriom_contacts">
</FrameLayout>
<include
android:id="#+id/app_bar"
layout="#layout/search_appbar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/textView27"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:onClick="deleteSyncedContactsItemClicked"
android:padding="12dp"
android:text="#string/delete_synced_contacts"
android:clickable="true"
android:background="#drawable/my_ripple"
android:textColor="#color/colorAccent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/app_bar"
android:focusable="true" />
<TextView
android:id="#+id/textView28"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:padding="12dp"
android:text="#string/sync_contacts"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView27" />
<TextView
android:id="#+id/textView29"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:drawableStart="#drawable/ic_share"
android:drawablePadding="12dp"
android:padding="12dp"
android:onClick="inviteFriendsToMirorimItemClicked"
android:text="#string/invite_friends_to_mirorim"
android:textColor="#color/colorAccent"
android:clickable="true"
android:background="#drawable/my_ripple"
app:drawableTint="#color/colorAccent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView28"
android:focusable="true" />
<com.example.mirriom.Widget.SwitchButton
android:id="#+id/swt_sync_contacts"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="12dp"
app:layout_constraintBottom_toBottomOf="#+id/textView28"
app:layout_constraintEnd_toEndOf="#+id/textView28"
app:layout_constraintTop_toBottomOf="#+id/textView27"
app:sb_checked="true"
app:sb_checked_color="#77d672"
app:sb_checkline_width="56dp"
app:sb_show_indicator="false"
app:sb_uncheckcircle_width="26dp" />
<TextView
android:id="#+id/tv_mirriom_contacts"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="5dp"
android:onClick="mirriomContactItemClicked"
android:padding="#dimen/text_clickable_padding"
android:text="#string/mirriom"
android:textColor="#color/influencer_text_selection"
android:textSize="#dimen/default_text_size"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/recycler_contact"
app:layout_constraintEnd_toStartOf="#+id/tv_all_contacts"
app:layout_constraintTop_toBottomOf="#+id/textView29" />
<TextView
android:id="#+id/tv_all_contacts"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="12dp"
android:onClick="AllContactItemClicked"
android:padding="#dimen/text_clickable_padding"
android:text="#string/all"
android:textColor="#color/influencer_text_selection"
android:textSize="#dimen/default_text_size"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/recycler_contact"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView29" />
<TextView
android:id="#+id/textView30"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="12dp"
android:text="#string/contacts"
android:textColor="#color/text_color"
android:textSize="#dimen/default_text_size"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="#+id/tv_mirriom_contacts"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/tv_mirriom_contacts" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>

Your RecyclerView's layout_height is set to wrap_content, which tells it to inflate all of its items at once and then set its height to the total height of the items with no scrolling (that is, the scrolling is coming only from the parent NestedScrollView). You want to put it outside of the NestedScrollView and set its height to match_parent (or 0dp if it's in a ConstraintLayout with constraints that will size it appropriately), which will tell it to fill the space available. If you want nested scrolling with the RecyclerView for things like a collapsing toolbar, see this question for how to use CoordinatorLayout to accomplish this.

Android Material CardView with ConstraintLayout clip child not working

I want to overlap (take half the image outside) of the card view. The ShapeableImageView is a child of the card view.
I have tried adding clipChilder="false" on card view as well as on the child constraint layout but no luck. I also tried the same in runtime again no luck.
Layout
<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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=".fragments.ProfileFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.codepaints.velvet.views.HeaderView
android:id="#+id/v_profile_header"
android:layout_width="match_parent"
android:layout_height="235dp"
android:src="#drawable/img_profile_bg"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:overlay_color="#color/colorNavHeaderOverlay" />
<com.google.android.material.card.MaterialCardView
android:id="#+id/v_profile_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/app_space"
android:layout_marginEnd="#dimen/app_space"
android:clickable="false"
android:focusable="false"
android:translationY="-24dp"
app:cardCornerRadius="#dimen/app_space_h"
app:cardElevation="#dimen/app_shadow_two"
app:layout_constraintTop_toBottomOf="#+id/v_profile_header"
app:layout_constraintBottom_toBottomOf="#id/v_profile_header"
app:layout_constraintEnd_toEndOf="#+id/v_profile_header"
app:layout_constraintStart_toStartOf="#id/v_profile_header"
app:rippleColor="#android:color/transparent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/v_profile_card_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false">
<com.google.android.material.imageview.ShapeableImageView
android:id="#+id/v_profile_avatar"
android:layout_width="#dimen/profile_avatar_size"
android:layout_height="#dimen/profile_avatar_size"
android:background="#drawable/shape_circle_border"
android:src="#drawable/img_profile_avatar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="parent"/>
<View
android:id="#+id/v_profile_online_status_holder"
android:layout_width="#dimen/app_space"
android:layout_height="#dimen/app_space"
app:layout_constraintEnd_toEndOf="#id/v_profile_avatar"
app:layout_constraintStart_toStartOf="#id/v_profile_avatar"
app:layout_constraintTop_toBottomOf="#+id/v_profile_avatar" />
<View
android:id="#+id/v_profile_online_status"
android:layout_width="#dimen/app_space"
android:layout_height="#dimen/app_space"
android:layout_marginBottom="#dimen/app_space_h"
android:background="#drawable/shape_circle"
android:backgroundTint="#color/colorOnline"
app:layout_constraintBottom_toBottomOf="#id/v_profile_online_status_holder"
app:layout_constraintEnd_toEndOf="#id/v_profile_avatar"
app:layout_constraintStart_toStartOf="#id/v_profile_avatar" />
<TextView
android:id="#+id/v_profile_username"
style="#style/TextAppearance.MaterialComponents.Headline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/profile_username"
android:textAlignment="center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/v_profile_avatar" />
<TextView
android:id="#+id/v_profile_qualification"
style="#style/TextAppearance.MaterialComponents.Body2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableStart="#drawable/ic_university"
android:drawablePadding="#dimen/app_space_q"
android:text="#string/profile_qualification"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/v_profile_username" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
Screenshot
Another Test
I have tried out without MaterialCardView but the result is the same.
I have no idea why it is not working.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".fragments.ProfileFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/v_profile_card"
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="#color/colorAccent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:clipChildren="false"
app:elevation="1dp"
android:clipToPadding="false">
<ImageView
app:elevation="16dp"
android:id="#+id/v_image"
android:layout_width="128dp"
android:layout_height="128dp"
android:src="#drawable/img_profile_avatar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="parent"/>
<TextView
android:id="#+id/v_user"
style="#style/TextAppearance.MaterialComponents.Headline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/profile_username"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/v_image"
android:background="#color/colorNutritionKcal"
android:translationY="60dp"
android:elevation="100dp"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Screenshot
Test 3
It won't work with LinearLayout too :(
<LinearLayout
android:orientation="vertical"
android:id="#+id/v_profile_card"
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="#color/colorAccent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:clipChildren="false"
android:elevation="1dp"
android:clipToPadding="false">
<ImageView
android:elevation="#dimen/app_space"
android:id="#+id/v_image"
android:layout_width="128dp"
android:layout_height="128dp"
android:translationY="-60dp"
android:src="#drawable/img_profile_avatar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="parent"/>
<TextView
android:id="#+id/v_user"
style="#style/TextAppearance.MaterialComponents.Headline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/profile_username"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/v_image"
android:background="#color/colorNutritionKcal"
android:translationY="60dp"
android:elevation="100dp"/>
</LinearLayout>

In my case you can add this to MaterialCardView xml file
android:outlineProvider="none"

Alright, so after trying so many different ways, finally found the solution.
In my case, I have an image wrapped by a card view, and the card view is inside a constraint layout. So here I have to set android:clipChildren="false" for both views, ConstraintLayout the parent and the CardView a child. See the final code below.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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=".fragments.ProfileFragment">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipChildren="false">
<com.codepaints.velvet.views.HeaderView
android:id="#+id/v_profile_header"
android:layout_width="match_parent"
android:layout_height="235dp"
android:src="#drawable/img_profile_bg"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:overlay_color="#color/colorNavHeaderOverlay" />
<com.google.android.material.card.MaterialCardView
android:id="#+id/v_profile_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/app_space"
android:layout_marginEnd="#dimen/app_space"
android:clickable="false"
android:focusable="false"
android:translationY="-24dp"
android:clipChildren="false"
app:cardCornerRadius="#dimen/app_space_h"
app:cardElevation="#dimen/app_shadow_two"
app:layout_constraintTop_toBottomOf="#+id/v_profile_header"
app:layout_constraintBottom_toBottomOf="#id/v_profile_header"
app:layout_constraintEnd_toEndOf="#+id/v_profile_header"
app:layout_constraintStart_toStartOf="#id/v_profile_header"
app:rippleColor="#android:color/transparent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/v_profile_card_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.imageview.ShapeableImageView
android:id="#+id/v_profile_avatar"
android:layout_width="#dimen/profile_avatar_size"
android:layout_height="#dimen/profile_avatar_size"
android:background="#drawable/shape_circle_border"
android:src="#drawable/img_profile_avatar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="parent"/>
<View
android:id="#+id/v_profile_online_status_holder"
android:layout_width="#dimen/app_space"
android:layout_height="#dimen/app_space"
app:layout_constraintEnd_toEndOf="#id/v_profile_avatar"
app:layout_constraintStart_toStartOf="#id/v_profile_avatar"
app:layout_constraintTop_toBottomOf="#+id/v_profile_avatar" />
<View
android:id="#+id/v_profile_online_status"
android:layout_width="#dimen/app_space"
android:layout_height="#dimen/app_space"
android:layout_marginBottom="#dimen/app_space_h"
android:background="#drawable/shape_circle"
android:backgroundTint="#color/colorOnline"
app:layout_constraintBottom_toBottomOf="#id/v_profile_online_status_holder"
app:layout_constraintEnd_toEndOf="#id/v_profile_avatar"
app:layout_constraintStart_toStartOf="#id/v_profile_avatar" />
<TextView
android:id="#+id/v_profile_username"
style="#style/TextAppearance.MaterialComponents.Headline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/profile_username"
android:textAlignment="center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/v_profile_avatar" />
<TextView
android:id="#+id/v_profile_qualification"
style="#style/TextAppearance.MaterialComponents.Body2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableStart="#drawable/ic_university"
android:drawablePadding="#dimen/app_space_q"
android:text="#string/profile_qualification"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/v_profile_username" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>