ScrollView doesn't scroll in a ViewPager - java

In my app I use a TabLayout under a Toolbar, and a ViewPager filling the rest of the space. I need one of the fragments under the tab to be able to scroll. tried using ScrollView, NestedScrollView and android:fillViewport="true" with no success.
I've looked at other questions about the same problem, tried anything that was suggested in the answers, but they all didn't solve my problem.
the activity that contains the ViewPager's code:
<?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"
android:orientation="vertical"
tools:context=".UserProfile">
<include
android:id="#+id/userToolbar"
layout="#layout/user_info_toolbar_layout" />
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/userToolbar"
android:background="#android:color/holo_blue_light"
app:tabSelectedTextColor="#android:color/white"
app:tabTextColor="#android:color/black">
<com.google.android.material.tabs.TabItem
android:id="#+id/dashboardTab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/dashboard_tab_text_en" />
<com.google.android.material.tabs.TabItem
android:id="#+id/statisticsTab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/statistics_tab_text_en" />
</com.google.android.material.tabs.TabLayout>
<androidx.viewpager.widget.ViewPager
android:id="#+id/userInfoViewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/tabLayout" />
</androidx.constraintlayout.widget.ConstraintLayout>
the fragment's code:
<?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:id="#+id/user_dashboard_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
tools:context=".Dashboard">
<androidx.constraintlayout.widget.ConstraintLayout
android:padding="40dp"
android:id="#+id/userInfoContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.github.abdularis.civ.CircleImageView
android:id="#+id/userImage"
android:layout_width="match_parent"
android:layout_height="0dp"
android:padding="20dp"
android:scaleType="fitCenter"
android:src="#drawable/male_user_sample1"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/username_sample"
android:textColor="#color/colorPrimaryDark"
android:textSize="30sp"
app:layout_constraintTop_toBottomOf="#id/userImage" />
<com.ramijemli.percentagechartview.PercentageChartView
android:id="#+id/userLevelProgress"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="20dp"
android:outlineAmbientShadowColor="#color/colorPrimary"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/username"
app:pcv_animDuration="1000"
app:pcv_animInterpolator="anticipate_overshoot"
app:pcv_drawBackground="false"
app:pcv_drawBackgroundBar="false"
app:pcv_mode="ring"
app:pcv_orientation="counter_clockwise"
app:pcv_progress="100"
app:pcv_startAngle="270"
app:pcv_textColor="#color/colorPrimary"
app:pcv_textShadowRadius="100"
app:pcv_textSize="50sp" />
<TextView
android:id="#+id/userLevel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="#string/level_sample"
android:textColor="#color/colorPrimary"
android:textSize="40sp"
app:layout_constraintTop_toBottomOf="#id/userLevelProgress" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
I can't find the problem in my code that causes the fragment under the ViewPager being unscrollable.

Rty this
In your ViewPager
<androidx.viewpager.widget.ViewPager
android:id="#+id/userInfoViewPager"
android:layout_width="match_parent"
android:layout_height="0dp" // <- ****
app:layout_constraintBottom_toBottomOf="parent" // <- ****
app:layout_constraintTop_toBottomOf="#id/tablayout"
/>
Then, in fragment xml
<ScrollView
....
android:layout_width="match_parent"
android:layout_height="match_parent" // <- ****
>
<androidx.constraintlayout.widget.ConstraintLayout
android:padding="40dp"
android:id="#+id/userInfoContainer"
android:layout_width="match_parent"
android:layout_height="match_parent" // <- ****
>

it's seems like there some bug with ConstraintLayout inside ScrollView ,Don't forget that If you constraint some view's bottom to constraint layout's bottom. Scrollview could not scroll. Use NestedScrollView with viewport true is working good for me
<android.support.v4.widget.NestedScrollView>
......
......
</android.support.v4.widget.NestedScrollView>

Related

Set view to be at bottom of camera preview?

I'd like to set the position of the TextView to always be at the bottom of the camera preview.
This is not the case with my layout below. When the user changes the aspect the ratio of the camera preview (ex: from 16:9 to 4:3), the TextView remains in the same position and is no longer at the bottom of the preview.
How do I set the position of the TextView to always be at the bottom (left) of the camera preview?
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.activities.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/root"
android:background="#color/black"
tools:context=".ui.activities.MainActivity">
<FrameLayout
android:id="#+id/main_frame"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:paddingTop="8dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/preview_container"
android:layout_height="match_parent"
android:layout_width="match_parent">
<androidx.camera.view.PreviewView
android:id="#+id/preview"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintDimensionRatio="H,9:16"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="#+id/preview"
android:textColor="#ffffffff"
android:text="Text Test" />
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
</RelativeLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Try this:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.activities.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/root"
android:background="#color/black"
android:orientation="vertical"
tools:context=".ui.activities.MainActivity">
<FrameLayout
android:id="#+id/main_frame"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:paddingTop="8dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/preview_container"
android:layout_height="match_parent"
android:layout_width="match_parent">
<androidx.camera.view.PreviewView
android:id="#+id/preview"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintDimensionRatio="H,9:16"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:textColor="#ffffffff"
android:text="Text Test" />
</FrameLayout>
</RelativeLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Sorry i dont have enough reputation for comment so i will try answer directly
This problem occurs because you set your textview bottom to bottom with camera preview while use ConstraintLayout. I can give you two option for solve this,
first change textview from app:layout_constraintBottom_toBottomOf to app:layout_constraintTop_toBottomOf.
Second try for wrap it with linearlayout and set orientation to vertical.

How to Show/Hide Action Bar on Swipe using Coordinator Layout?

I show/hide the bottom navigation bar on swiping with CoordinatorLayout but am unable to show/hide the action bar using CoordinatorLayout. What mistake I did in my layout?
On swiping, the bottom navigation bar in my layout is auto-hide and show but not on the top action bar?
This is My XML Layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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:orientation="vertical"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/noInternet_layout"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/no_wifi_image"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_wifi_off_24" />
<TextView
android:id="#+id/no_wifi_text"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:text="#string/noWifi"
android:textSize="16sp"
app:layout_constraintEnd_toEndOf="#+id/no_wifi_image"
app:layout_constraintStart_toStartOf="#+id/no_wifi_image"
app:layout_constraintTop_toBottomOf="#+id/no_wifi_image" />
<Button
android:id="#+id/no_wifi_button"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="TRY AGAIN"
app:layout_constraintEnd_toEndOf="#+id/no_wifi_text"
app:layout_constraintStart_toStartOf="#+id/no_wifi_text"
app:layout_constraintTop_toBottomOf="#+id/no_wifi_text" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/constraintLyt"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="#+id/toolbar"
layout="#layout/main_toolbar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_scrollFlags="scroll|enterAlways" />
<androidx.fragment.app.FragmentContainerView
android:id="#+id/navHostFrag"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="#+id/constraintLyt"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/toolbar"
app:layout_constraintVertical_bias="1.0"
app:navGraph="#navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/navView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:attr/windowBackground"
app:itemTextColor="#drawable/bottom_text_selector"
app:itemIconTint="#drawable/bottom_navigation_selector"
app:layout_behavior="#string/hide_bottom_view_on_scroll_behavior"
app:itemTextAppearanceActive="#color/white"
app:labelVisibilityMode="labeled"
app:itemRippleColor="#color/menucolor"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_gravity="bottom"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/bottom_nav_menu" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Please Help me to solve this issue?
Finally I found.
This is very simple to get swipeable (Show-Hide) both side of bottom Navigation and Top ActionBar without any backend code.
Follow Below code
<!--This is your parent layout-->
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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=".MainActivity">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appBarLayout"
app:elevation="0dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|snap"
android:layout_height="?attr/actionBarSize">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<!--Move your main layout of the screen to a different layout and call it with include. Without including that, you cannot hide one of them Top or Bottom. So move that layout and include it here. (example- #layout/content_main)-->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<include layout="#layout/content_main"/>
</FrameLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottom_view"
android:layout_width="match_parent"
android:layout_height="#dimen/custom_bottomBar_size"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"
style="#style/Widget.Custom.BottomNavigationView"
app:itemRippleColor="?android:attr/windowBackground"
app:itemTextAppearanceActive="#color/white"
app:labelVisibilityMode="labeled"
app:menu="#menu/bottom_navigation" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
By using ablow proper method, you'll easily swipe up-down both BottomNavigation and Top ActionBar
Output is like below
Hope It'll help someone.

How make layout scrollable when softKeyBoard hides buttons and other elements [ANDROID]

my goal is to make login ui with footer text, also page should be scrollable whenever content wont show on a view.
I add scroll view in my layout but, when keyboard appears scroll doesn't works anyn suggestions ? those doesn't work, I don't want that button appears above the keyboard
android:windowSoftInputMode="stateHidden|adjustPan"
android:windowSoftInputMode="stateHidden|adjustResize"
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".auth.AuthFragment">
<androidx.core.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toTopOf="#id/footer">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/authConstraint"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/usernameInputLayout"
android:layout_width="384dp"
android:layout_height="75dp">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/usernameInputEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<com.google.android.material.button.MaterialButton
android:id="#+id/uSubmit"
android:layout_width="match_parent"
app:layout_constraintTop_toBottomOf="#+id/usernameInputLayout" />
<com.google.android.material.button.MaterialButton
android:id="#+id/uRegistration"
android:layout_width="match_parent"
android:layout_height="70dp"
android:backgroundTint="#2C2C2E"
android:text="SIGNIN"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/uSubmit"
app:layout_constraintStart_toStartOf="#+id/uSubmit"
app:layout_constraintTop_toBottomOf="#+id/uSubmit" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
<FrameLayout
android:id="#+id/footer"
android:layout_width="match_parent"
android:layout_height="70dp"
android:background="#color/black"
app:layout_constraintBottom_toBottomOf="#+id/scroll"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="358dp"
android:layout_height="wrap_content"
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
<LinearLayout
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:orientation="vertical">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<View
android:id="#id/view_1"
...
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="#id/view_2"
...
app:layout_constraintTop_toBottomOf="#id/view_1" />
<View
android:id="#id/view_3"
...
app:layout_constraintTop_toBottomOf="#id/view_2" />
<View
android:id="#id/view_4"
...
app:layout_constraintTop_toBottomOf="#id/view_3"
app:layout_constraintBottom_toBottomOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
</LinearLayout>
Make sure you have constraints between all views, parent top and parent bottom.
From my example you can see constraints PARENT_TOP <- View 1 <- View 2 <- View 3 <- View 4 -> PARENT_BOTTOM

Unable to hide TabLayout when scrolling (HELP!)

I can't get any way to hide the TabLayout when I scroll a fragment
I tried app:layout_scrollFlags="scroll|enterAlways" but no results
I put appbarlayout, collapsedBarLayout too but not hide anything
Right now I have this code:
<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
android:id="#+id/header"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/blanco"
>
<FrameLayout
android:id="#+id/tab"
android:layout_width="match_parent"
android:layout_height="48dp"
/>
<FrameLayout
android:id="#+id/subtab"
android:layout_width="match_parent"
android:layout_height="48dp"
android:visibility="gone"
/>
</LinearLayout>
<android.support.design.widget.TabLayout
android:id="#+id/viewpagertabb"
android:layout_width="match_parent"
android:layout_height="48dp"
android:layout_marginTop="5dp"
android:background="#drawable/tab_layout_background"
app:tabMode="scrollable"
app:layout_scrollFlags="scroll|enterAlways"
app:tabIndicator="#drawable/tab_background_selected"
/>
<android.support.design.widget.TabLayout
android:id="#+id/viewpagertabsub"
android:layout_width="match_parent"
android:layout_height="48dp"
android:visibility="gone"
android:background="#drawable/sub_tab_layout_background"
app:tabMode="scrollable"
app:layout_scrollFlags="scroll|enterAlways"
app:tabBackground="#drawable/sub_tab_layout_selector"
app:tabSelectedTextColor="#color/blanco"
android:layout_below="#id/viewpagertabb"
/>
<FrameLayout
android:id="#+id/viewpagerpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/viewpagertabsub"
/>
</RelativeLayout>
In the last FrameLayout is where is the content of a fragment. Anyone?
Thank to all!

Button align to bottom, is been hidden from ImageView

I want to place a button in bottom of my layout. Also i have place an image view with layout_alignParentTop, my proble is that my imageview is hide my button.
How can i solve that?
<?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">
<Button
android:id="#+id/btnGetMoreResults"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Get more"
android:layout_alignParentBottom="true" />
<ImageView
android:layout_alignParentTop="true"
android:src="#android:drawable/ic_menu_gallery"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/btnGetMoreResults"
android:id="#+id/imageView1" />
</RelativeLayout>
Look the picture below
Should i use CoordinatorLayout instead of RelativeLayout?
In your ImageView, don't use
android:layout_alignParentBottom="true"
You must use
android:layout_above="#+id/your_button"
This is the final code, don't forget to modify it for your need
<RelativeLayout
android:id="#+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_alignParentTop="true"
android:layout_above="#id/button"
android:layout_width="match_parent"
android:layout_height="0dp"/>
<Button
android:id="#+id/button"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
Use this in imageview
android:margin_bottom="50dp";
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#+id/next_btn"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/next_btn"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="next"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

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