DialogFragment with fixed header, scrollable body and fixed footer - android

I want to show a dialog with a title (header), body (content) and accept button (footer). I want header and footer to be visible even if content is longer than the screen height. If this is the case, I want body to be scrollable so that it can shrink. Here is what I tried, scrollView gets all the dialog space, no header and no footer is shown:
<?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="wrap_content"
android:fillViewport="true"
android:minWidth="300dp">
<TextView
android:id="#+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#android:color/darker_gray"
android:text="Title"
app:layout_constraintBottom_toTopOf="#+id/bodyContainer"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ScrollView
android:id="#+id/bodyContainer"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#+id/buttonContainer"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/title">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="1500dp"
android:text="Long text" />
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/buttonContainer"
android:layout_width="0dp"
android:layout_height="30dp"
android:background="#android:color/darker_gray"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/bodyContainer" />
</androidx.constraintlayout.widget.ConstraintLayout>


When your ScrollView's height is set to wrap_content the constraints will not limit the dimension if it gets too big to satisfy them. To fix this and enforce the top and bottom constraints, set app:layout_constrainedHeight="true" for your ScrollView.


Here is exactly what you just want. Use NestedScrollView instead of ScrollView:
<?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"
android:minWidth="300dp">
<TextView
android:id="#+id/title"
android:layout_width="411dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:background="#android:color/darker_gray"
android:text="Title"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<androidx.core.widget.NestedScrollView
android:id="#+id/bodyContainer"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/title"
app:layout_constraintBottom_toTopOf="#+id/button">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="1500dp"
android:text="Long text" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<Button
android:id="#+id/button"
android:layout_width="411dp"
android:layout_height="30dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:background="#android:color/darker_gray"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
</androidx.constraintlayout.widget.ConstraintLayout>

Related

I am struggling to control the gravity of a textView inside my CardView items once I put it inside a GridView

Below is a screenshot of my gridView currently:
Even though I have centered the TextField inside the card, they are still pinned to the left. How do I fix this so that the Text is centered in the middle? It seems like once I add an item to a gridView, the gridView attributes overrule their children.
Here is my layout code:
CARDVIEW
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
layout_height=""
android:layout_width="120dp"
android:layout_height="120dp"
app:cardBackgroundColor="#E73737"
app:cardElevation="4dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/ivCategoryIcon"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginTop="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="#+id/tvCategoryTitle"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/btn_translation_panel_loading" />
<TextView
android:id="#+id/tvCategoryTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:layout_marginBottom="8dp"
android:text="TextView"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ivCategoryIcon"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
Fragment
<?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:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.fragments.CategoryViewFragment">
<GridView
android:id="#+id/gvCategories"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp"
android:clickable="true"
android:clipChildren="false"
android:gravity="center"
android:horizontalSpacing="8dp"
android:numColumns="2"
android:stretchMode="columnWidth"
android:verticalSpacing="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:visibility="visible" />
</androidx.constraintlayout.widget.ConstraintLayout>

Add android:gravity="center" in your textview like following.
<TextView
android:id="#+id/tvCategoryTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:layout_marginBottom="8dp"
android:text="TextView"
android:gravity="center"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ivCategoryIcon"/>

use relative layout insists of ConstraintLayout.
use center_horizontal to the text view=true

Can you please try this and change your constraint layout ?
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/ivCategoryIcon"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginTop="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/btn_translation_panel_loading" />
<TextView
android:id="#+id/tvCategoryTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:layout_marginBottom="8dp"
android:text="TextView"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ivCategoryIcon"
/>
</androidx.constraintlayout.widget.ConstraintLayout>

RecyclerView not showing in ConstraintLayout

I'm trying to show a RecyclerView ("mapRecyclerView") below another ConstraintLayout ("clientData) inside a ConstraintLayout but it presents a strange behavior: RecyclerView ("mapRecyclerView") has a Top Constraint to the bottom of another ConstraintLayout ("clientData"), if this ConstraintLayout has width as specific dp the recyclerview shows fine but if the ConstraintLayout has a width of "match_constraint" the RecyclerView is not visible anymore and the "afterMeasured" event of the RecyclerView is never called, here is the XML of the layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="0dp"
android:layout_height="?attr/actionBarSize"
android:minHeight="?attr/actionBarSize"
android:background="#android:color/white"
android:elevation="4dp" app:layout_constraintStart_toStartOf="parent"
android:fontFamily="#font/gotham_rounded_book"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" android:theme="#style/custom_toolbar"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="0dp"
android:layout_height="wrap_content" app:layout_constraintTop_toBottomOf="#+id/toolbar"
app:layout_constraintStart_toStartOf="parent"
android:id="#+id/clientData" android:background="#color/white"
app:layout_constraintEnd_toEndOf="parent">
<TextView
android:text="1"
android:layout_width="35dp"
android:layout_height="35dp"
android:id="#+id/activeServiceNumber"
android:background="#drawable/button_yellow_round_border" android:textAlignment="center"
android:textSize="18sp"
app:layout_constraintTop_toTopOf="#+id/name" android:layout_marginStart="8dp"
app:layout_constraintStart_toStartOf="parent"
android:fontFamily="#font/gotham_rounded_medium"
android:paddingTop="6dp" android:textColor="#color/white" android:layout_marginTop="8dp"/>
<TextView
android:text="TextView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="#+id/name"
app:layout_constraintStart_toEndOf="#+id/activeServiceNumber" android:layout_marginStart="8dp"
android:fontFamily="#font/gotham_rounded_medium" android:textColor="#color/colorPrimaryText"
android:textSize="16sp" android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp" app:layout_constraintBottom_toTopOf="#+id/client"
app:layout_constraintTop_toTopOf="parent" android:layout_marginTop="8dp"
app:layout_constraintEnd_toStartOf="#+id/directionsBtn"/>
<TextView
android:text="TextView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="#+id/client"
app:layout_constraintStart_toEndOf="#+id/activeServiceNumber" android:layout_marginStart="8dp"
android:fontFamily="#font/gotham_rounded_light" android:textSize="15sp" android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="#+id/address"
app:layout_constraintEnd_toStartOf="#+id/directionsBtn"/>
<TextView
android:text="TextView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="#+id/address"
app:layout_constraintStart_toEndOf="#+id/activeServiceNumber" android:layout_marginStart="8dp"
android:fontFamily="#font/gotham_rounded_light" android:textSize="13sp" android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="#+id/phone"
app:layout_constraintEnd_toStartOf="#+id/directionsBtn"/>
<TextView
android:text="TextView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="#+id/phone"
app:layout_constraintStart_toEndOf="#+id/activeServiceNumber" android:layout_marginStart="8dp"
android:textSize="13sp" android:fontFamily="#font/gotham_rounded_light" android:layout_marginEnd="8dp"
app:layout_constraintBottom_toBottomOf="parent" android:layout_marginBottom="16dp"
app:layout_constraintEnd_toStartOf="#+id/directionsBtn"/>
<Button
android:layout_width="wrap_content"
android:layout_height="0dp"
android:id="#+id/directionsBtn"
app:layout_constraintEnd_toEndOf="parent"
android:text="Mostrar \nRuta"
android:drawableTop="#drawable/ic_go_to_route" android:textAllCaps="false"
android:background="#color/white"
android:padding="10dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/ongoingServiceMap"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
android:clickable="true"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
tools:context="com.cargamos.cargamosdriver.views.service.OngoingServiceActivity"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintBottom_toBottomOf="parent" android:focusable="true"
app:layout_constraintTop_toBottomOf="#+id/clientData"/>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="wrap_content"
android:layout_marginTop="32dp"
android:layout_marginBottom="32dp"
app:layout_constraintStart_toStartOf="#+id/ongoingServiceMap"
android:layout_marginStart="8dp"
android:id="#+id/mapRecyclerView"
android:background="#color/white"
app:layout_constraintBottom_toTopOf="#+id/confirmArrivalSlider"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="#+id/clientData"/>
<com.ncorti.slidetoact.SlideToActView
android:id="#+id/confirmArrivalSlider"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:text="Confirmar llegada"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:slider_height="60dp"
app:area_margin="4dp"
app:outer_color="#color/colorPrimary" app:text_style="bold" app:text_size="18dp"
android:layout_marginStart="32dp" android:layout_marginBottom="24dp" android:layout_marginEnd="32dp"/>
</androidx.constraintlayout.widget.ConstraintLayout>

Depending on what items you have in your RecyclerView, you probably want to set the width of the RecyclerView to match_parent.
By the way, I can't reproduce the problem you describe in the preview

Align layout at the bottom of the screen

I would like to have the same as on the enclosed image with the scanning information widgets (progressbar, textview and button) to stay at the bottom of the screen. However when I run my app they go at the top of the screen when the ListView is empty.
I tried a lot of methods described in other topics, but I still could not make it work.
Do you have some suggestions about which layout I should use in this case?
<?xml version="1.0" encoding="utf-8"?>
<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">
<ListView
android:id="#+id/ListViewDevices"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="60dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ListViewDevices">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:id="#+id/progressBarDevice"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/lblScanningStatus"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:text="#string/scan_in_progress"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#+id/progressBarDevice" />
<Button
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="#string/pause_scan"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</android.support.constraint.ConstraintLayout>
</FrameLayout>
</android.support.constraint.ConstraintLayout>

This is the way I did it an app I worked on previously. Using a RelativeLayout as the main shell we are able to position elements in any way inside it.
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="10"
android:background="#color/white"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="55dp"
android:layout_alignParentBottom="true"
android:background="#color/grey_font">
<ProgressBar
android:id="#+id/progressBarDevice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginLeft="12dp" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_centerVertical="true"
android:layout_marginLeft="24dp"
android:layout_toRightOf="#id/progressBarDevice"
android:text="Scanning" />
<Button
android:layout_marginRight="16dp"
android:layout_centerVertical="true"
android:background="#color/orange_pay"
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="8dp"
android:text="PAUSE" />
</RelativeLayout>
</RelativeLayout>

I would first simplify the layout by flattening it slightly. Removed the FrameLayout that holds the bottom Constraint.. Then made the listViewDevices constrain bottom to top of the bottom contraint layout (which i have called scanner)..
Looks correct in my layout editor.
<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">
<ListView
android:id="#+id/ListViewDevices"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="60dp"
app:layout_constraintBottom_toTopOf="#id/scanner"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.constraint.ConstraintLayout
android:id="#+id/scanner"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintHorizontal_bias="1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/ListViewDevices"
app:layout_constraintBottom_toBottomOf="parent">
<ProgressBar
android:id="#+id/progressBarDevice"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/lblScanningStatus"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:text="SCANNING FOR NEW DEVICES..."
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#+id/progressBarDevice" />
<Button
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="PAUSE"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</android.support.constraint.ConstraintLayout>

I would rather prefer to add LinearLayout as root layout.
So when you scroll down or up then it will not scroll with your layout when its empty.
So when your listview is empty then also it will be in the bottom of the screen only.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="#+id/ListViewDevices"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="60dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ListViewDevices">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:id="#+id/progressBarDevice"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/lblScanningStatus"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:text="#string/scan_in_progress"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#+id/progressBarDevice" />
<Button
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="#string/pause_scan"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</LinearLayout>
</FrameLayout>
</LinearLayout>

Thank you for your answers but none of them works. Sometimes it looks fine in Android Studio but when I test my application on a real phone the widgets are displayed on top of the screen.
If I will find a working solution I will post it here.

how to prevent imageView from shrinking beyond the size of its containing items in constraint layout?

I am designing a constraint layout for an android application and I want the layout to look something like this:
The problem is that as soon as I constraint the height of the image views, they shrink until there is nothing left. I want the image views to have at least as much height as the text views they surround, plus a little padding. How can I do that without specifying an absolute height for the image views?
Here is my XML 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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryLightBlue">
<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="wrap_content">
<ImageView
android:id="#+id/imageView12"
android:layout_width="0dp"
android:layout_height="125dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView13"
app:srcCompat="#drawable/button_round_bg_off" />
<ImageView
android:id="#+id/imageView14"
android:layout_width="0dp"
android:layout_height="125dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView12"
app:srcCompat="#drawable/button_round_bg_off" />
<ImageView
android:id="#+id/imageView13"
android:layout_width="0dp"
android:layout_height="125dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/button_round_bg_off" />
<TextView
android:id="#+id/textView15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="#+id/imageView14"
app:layout_constraintEnd_toEndOf="#+id/imageView14"
app:layout_constraintStart_toStartOf="#+id/imageView14"
app:layout_constraintTop_toTopOf="#+id/imageView14" />
<TextView
android:id="#+id/textView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="#+id/imageView12"
app:layout_constraintEnd_toEndOf="#+id/imageView12"
app:layout_constraintStart_toStartOf="#+id/imageView12"
app:layout_constraintTop_toTopOf="#+id/imageView12" />
<TextView
android:id="#+id/textView16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="#+id/imageView13"
app:layout_constraintEnd_toEndOf="#+id/imageView13"
app:layout_constraintStart_toStartOf="#+id/imageView13"
app:layout_constraintTop_toTopOf="#+id/imageView13" />
</android.support.constraint.ConstraintLayout>

<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_blue_bright">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView12"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:contentDescription="Image description."
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView13"
app:layout_constraintBottom_toTopOf="#id/imageView14" />
<ImageView
android:id="#+id/imageView14"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:contentDescription="Image description."
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView12"
app:layout_constraintBottom_toBottomOf="parent"
app:srcCompat="#android:drawable/alert_dark_frame" />
<ImageView
android:id="#+id/imageView13"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:contentDescription="Image description."
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="#id/imageView12"
app:srcCompat="#android:drawable/alert_dark_frame" />
<TextView
android:id="#+id/textView15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:padding="15dp"
android:text="TextView"
android:textColor="#android:color/white"
app:layout_constraintBottom_toBottomOf="#+id/imageView14"
app:layout_constraintEnd_toEndOf="#+id/imageView14"
app:layout_constraintStart_toStartOf="#+id/imageView14"
app:layout_constraintTop_toTopOf="#+id/imageView14" />
<TextView
android:id="#+id/textView17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:padding="15dp"
android:text="TextView"
android:textColor="#android:color/white"
app:layout_constraintBottom_toBottomOf="#+id/imageView12"
app:layout_constraintEnd_toEndOf="#+id/imageView12"
app:layout_constraintStart_toStartOf="#+id/imageView12"
app:layout_constraintTop_toTopOf="#+id/imageView12" />
<TextView
android:id="#+id/textView16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:padding="15dp"
android:text="TextView"
android:textColor="#android:color/white"
app:layout_constraintBottom_toBottomOf="#+id/imageView13"
app:layout_constraintEnd_toEndOf="#+id/imageView13"
app:layout_constraintStart_toStartOf="#+id/imageView13"
app:layout_constraintTop_toTopOf="#+id/imageView13" />
</android.support.constraint.ConstraintLayout>
</ScrollView>
Use the above code and save the "Image description." in the strings.xml file and as you can notice that the imageView12 is not having app:srcCompat attribute in which you are specifying your drawable but still all the three image views are having the same distribution in terms of space occupied by them. Also, I have given padding of "15dp" to all the three text views which you may manage as per your requirement. Hope this helps you.

There is one magical attribute in ConstraintLayout.
app:layout_constraintHeight_min="wrap"
And I think you have constraint reversed. ImageView should constraintTo the TextView.
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#2222">
<android.support.constraint.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="wrap_content">
<TextView
android:id="#+id/textView16"
android:layout_width="0dp"
android:layout_height="60dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/imageView13"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imageView13"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:padding="2dp"
app:layout_constraintBottom_toBottomOf="#+id/textView16"
app:layout_constraintEnd_toStartOf="#+id/textView16"
app:layout_constraintHeight_min="wrap"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/textView16"
app:srcCompat="#drawable/ic_message_check" />
</android.support.constraint.ConstraintLayout>
</ScrollView>
This will not allow ImageView's height to go below "wrap_content" value. But if you chose this you will have to make sure height of the TextView will be at least that of "wrap" of the ImageView.
But this should be the only caveat. ImageView will automatically resize based on height of the TextView(and wrap of the width)

Android ConstraintLayout sometimes doesn't draw correctly after switching between tabs

I'm seeing a ConstraintLayout occasionally fail to draw correctly, but only when I switch between fragments, and I'm not seeing why.
It looks like this initially:
But, after switching tabs, it looks like this:
fragment_overview.xml (The Fragment layout)
<android.support.constraint.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"
android:background="#color/palette_grey_light"
android:clipToPadding="false"
android:paddingTop="16dp">
<uk.lobsterdoodle.edinburghwolves.view.FixtureView
android:id="#+id/overview_fixture_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
... a few other views ...
</android.support.constraint.ConstraintLayout>
fixture_view.xml (The custom view layout, FixtureView)
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="wrap_content">
<View
android:id="#+id/fixture_away_color"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#color/palette_red"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/fixture_home_color"
app:layout_constraintHorizontal_chainStyle="spread"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<View
android:id="#+id/fixture_home_color"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#color/palette_grey"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_chainStyle="spread"
app:layout_constraintStart_toEndOf="#+id/fixture_away_color"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/fixture_away_team_score"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="27"
android:textColor="#color/palette_white"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="#+id/fixture_away_team_name"
app:layout_constraintStart_toStartOf="#+id/fixture_away_team_name"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/fixture_away_team_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="32dp"
android:text="WOLVES"
android:textColor="#color/palette_white"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/fixture_home_color"
app:layout_constraintTop_toBottomOf="#+id/fixture_away_team_score"
app:layout_constraintVertical_bias="0.0"
android:layout_marginTop="0dp"/>
<TextView
android:id="#+id/fixture_home_team_score"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="21"
android:textColor="#color/palette_white"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="#+id/fixture_home_team_name"
app:layout_constraintStart_toStartOf="#+id/fixture_home_team_name"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/fixture_home_team_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginStart="32dp"
android:text="PIRATES"
android:textColor="#color/palette_white"
android:textSize="16sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="#+id/fixture_home_color"
android:layout_marginTop="0dp"
app:layout_constraintTop_toBottomOf="#+id/fixture_home_team_score"/>
<TextView
android:id="#+id/fixture_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:text="FINAL"
android:textColor="#color/palette_white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="#+id/fixture_away_team_score"
android:layout_marginBottom="0dp"
/>
</android.support.constraint.ConstraintLayout>

While your fixture_view.xml file constrains views in the ConstraintLayout properly, a view in the ConstraintLayout in fragment_overview.xml isn't constrained, so they won't display properly at runtime. Add some some constraints to your FixtureView in fragment_overview.xml like so:
<android.support.constraint.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"
android:background="#color/palette_grey_light"
android:clipToPadding="false"
android:paddingTop="16dp">
<!-- You were missing constraints here -->
<uk.lobsterdoodle.edinburghwolves.view.FixtureView
android:id="#+id/overview_fixture_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
app:cardBackgroundColor="#color/palette_white"
app:cardElevation="2dp"
app:contentPadding="16dp"
app:layout_constraintTop_toBottomOf="#id/overview_fixture_view"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="standings"
android:textColor="#color/palette_grey"/>
</android.support.v7.widget.CardView>
</android.support.constraint.ConstraintLayout>

Fixed, by making the score TextView's height wrap_content instead of matching constraint of 0dp
<TextView
android:id="#+id/fixture_away_team_score"
android:layout_width="wrap_content"
android:layout_height="wrap_content" <-- wrap, not 0dp
...
/>

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