overlay button progress dialog android - android

Hi I am new to android so today I learn about the progress bar, the goal I try to reach is to create an XML that only contains a progress bar and dialog, and this show in another XML, the error I present is when they make the progress bar show don't block ui so I can be able to click the buttons but the TextView its block, so any help would be appreciated please and thank you
This is mi XLM for progress bar
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:orientation="vertical"
android:background="#CCFFFFFF"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:id="#+id/progressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/pbText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:gravity="center"
android:text="Please wait ..."/>
</LinearLayout>
and this is my xml for the mainActivity
<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:importantForAutofill="noExcludeDescendants"
tools:ignore="UnusedAttribute">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toTopOf="#+id/textView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView" />
<include
android:id="#+id/llProgressBar"
layout="#layout/load_resource"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
And the image its see the button over the progress bar


Android Buttons has default elevation value. This means they are placed above other views sharing the same parent layout.
You can either set a higher elevation value to your LinearLayout
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:orientation="vertical"
android:background="#CCFFFFFF"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:elevation="10dp">
Note that android:clickable="true" is also needed in order to block the clicks on the layout below.
The second option would be to wrap the buttons with another (inner) layout:
<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:importantForAutofill="noExcludeDescendants"
tools:ignore="UnusedAttribute">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toTopOf="#+id/textView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<include
android:id="#+id/llProgressBar"
layout="#layout/load_resource"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
Using this method you don't need to set elevation to your included layout, but you still need to add android:clickable="true"

Related

My TextView is not visible on device - why?

<?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"
android:padding="30dp">
<TextView
android:id="#+id/callInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="22sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.3"
tools:text="••••••••••" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.3"
tools:text="••••••••••"
android:layout_marginTop="60dp"
android:textSize="42sp"
android:background="#eeeeee"/>
<Button
android:id="#+id/answer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Answer"
android:background="#color/colorPrimary"
android:textColor="#ffffff"
app:layout_constraintBaseline_toBaselineOf="#+id/hangup"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/hangup" />
<Button
android:id="#+id/hangup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hang up"
android:background="#color/colorAccent"
android:textColor="#ffffff"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/answer"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/callInfo" />
</android.support.constraint.ConstraintLayout>
I'm creating a simple calling application, where item layout are image and textview inside a constraint layout. However, when I run app in android deveice, the text view is not shown on the screen. Can someone please help me out. Thanks in advance.

Just replace tools:text="••••••••••" with android:text="••••••••••" or set a text programmatically :-)

Recyclerview listitem layout gravity issue

This is the chat bot. Some messages are left aligned and some are right aligned. Left aligned messages are working fine but right aligned messages also get left aligned. This is the required listitem. layout_gravity to be on the right. But when added to the recycledview, the list item moves to the left as depicted in another photo. I don't know what could be the culprit. Is it constraint_layout or linearlayoutmanager or something else.
`<?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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:padding="#dimen/paddingBig"
android:background="#drawable/balloon_outgoing_normal"
android:layout_gravity="right"
app:layout_constraintRight_toRightOf="parent"
android:layout_margin="8dp">
<TextView
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:id="#+id/text"
android:layout_width="0dp"
android:paddingRight="#dimen/paddingSmall"
android:layout_height="wrap_content"
tools:text="Hello hello Hellomnhbhvbhbvhbhvbhvbhbvhbvhbvhbvhbhvbhvbhvbhvbhbvhbvhbv hello Hello hello Hello hello Hello hello"/>
<TextView
android:id="#+id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintRight_toLeftOf="#id/status"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="#id/text"
tools:text="21/04/2016, 2:30 P.M."/>
<ImageView
android:id="#+id/status"
tools:visibility="visible"
android:src="#drawable/baseline_schedule_black_18"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="#id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content" tools:ignore="ContentDescription"/>
</androidx.constraintlayout.widget.ConstraintLayout>`
`<?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/chat_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true">
<ImageView
android:id="#+id/sendMessage"
android:layout_width="52dp"
android:layout_height="52dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="?android:attr/selectableItemBackground"
android:padding="#dimen/paddingMedium"
android:src="#drawable/send_disable" tools:ignore="ContentDescription"/>
<EditText
android:id="#+id/input"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/type_message"
app:layout_constraintRight_toLeftOf="#id/sendMessage"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:inputType="textCapSentences|textMultiLine"
android:maxLines="2"
android:padding="#dimen/paddingMedium" tools:ignore="Autofill"/>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="0dp"
android:layout_height="0dp"
android:paddingBottom="20dp"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toTopOf="#id/input"
tools:listitem="#layout/me_message"
app:layout_constraintTop_toTopOf="parent">
</androidx.recyclerview.widget.RecyclerView>
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
tools:visibility="visible"
android:visibility="gone"/>
</androidx.constraintlayout.widget.ConstraintLayout>`
I have tried many things. Actually earlier I have used relativelayout for the same and using alignParentBottom that is working but I am amazed why constraintlayout is not working.

You need to use a nested constraintlayout to achieve that view. Also in in your recyclerview set the width to match_parent
android:layout_width="match_parent"
<?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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.constraintlayout.widget.ConstraintLayout
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:padding="#dimen/paddingBig"
android:background="#drawable/balloon_outgoing_normal"
android:layout_margin="8dp">
<TextView
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:id="#+id/text"
android:layout_width="0dp"
android:paddingRight="#dimen/paddingSmall"
android:layout_height="wrap_content"
tools:text="Hello hello Hellomnhbhvbhbvhbhvbhvbhbvhbvhbvhbvhbhvbhvbhvbhvbhbvhbvhbv hello Hello hello Hello hello Hello hello"/>
<TextView
android:id="#+id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintRight_toLeftOf="#id/status"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="#id/text"
tools:text="21/04/2016, 2:30 P.M."/>
<ImageView
android:id="#+id/status"
tools:visibility="visible"
android:src="#drawable/baseline_schedule_black_18"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="#id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content" tools:ignore="ContentDescription"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

Set your RecyclerView's layout_width to match_parent and set right gravity for it. That should work.

Try this
<TextView
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:id="#+id/text"
android:layout_width="match_parent"
android:paddingRight="#dimen/paddingSmall"
android:layout_height="wrap_content"
tools:text="Hello hello Hellomnhbhvbhbvhbhvbhvbhbvhbvhbvhbvhbhvbhvbhvbhvbhbvhbvhbv hello Hello hello Hello hello Hello hello"/>

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.

scrollview not working after back from fragment

I'm facing a strange situation, I have designed a fragment to include a ScrollView but when i go to another fragment and back from backstack
View is Converted to another view not ScrollView and screen items overlaps
fragment XML:
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
tools:context="com.eh.waseldriver.TripDetailsFragment"
tools:layout_editor_absoluteY="25dp">
<ScrollView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:fillViewport="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/include"
layout="#layout/trip_item"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_margin="16dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"></include>
<Button
android:id="#+id/btn_cancel_trip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_margin="16dp"
android:background="#drawable/withoutbackgroundcolor"
android:gravity="center"
android:padding="10dip"
android:text="طلب إلغاء الرحله"
android:textColor="#color/md_white_1000"
android:visibility="visible"
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/recy_decoming_trips"
app:layout_constraintVertical_bias="1.0" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recy_decoming_trips"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_below="#+id/include"
app:layout_constraintEnd_toEndOf="#+id/include"
app:layout_constraintStart_toStartOf="#+id/include"
app:layout_constraintTop_toBottomOf="#+id/include" />
</android.support.constraint.ConstraintLayout>
</ScrollView>
and the below xml code is the another fragment design
<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"
tools:context="com.eh.waseldriver.ReportFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="44dp"
android:text="من فضلك إدخل التفاصيل التى تود الابلاغ عنها"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/et_report"
android:layout_width="268dp"
android:layout_height="123dp"
android:layout_marginTop="48dp"
android:ems="10"
android:inputType="textMultiLine"
app:layout_constraintHorizontal_bias="0.504"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView" />
<Button
android:id="#+id/bt_send_report"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:layout_marginBottom="8dp"
android:background="#drawable/edittext_style"
android:text="إرسال"
android:textColor="#color/colorPrimary"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
Note that ConstraintLayout Tag is closed but not appearing on the above
also you could check this GIF to see what happens it may help in investigating what is the wrong
GIF Link
I want to know the cause and how to solve it

I want View cover Button when View's parent layout is ConstraintLayout,but It's not the result I expect

Here's the code inner file activity_main.xml:
<?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="match_parent">
<Button
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="start"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<Button
android:id="#+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="stop"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button"/>
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#ff0000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</android.support.constraint.ConstraintLayout>
Here's the preview:
The Button is not covered.When I try replace the Button with TextView, The TextView is covered.
<?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="match_parent">
<Button
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="start"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="stop"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button" />
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#ff0000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
Here's the preview:
No information is found on the Internet. Do I have to replace the Button with a TextView, Is there any other way?

Your Buttons have a higher elevation than the View (and than the TextView). That's why it shows above the View, even when it should be drawn below by layout order.
See Buttons definition in Material Design Guidelines:
Elevation
Flat buttons: 0dp
Raised buttons: 2dp
And also the chapter on Elevation & Shadows.
So, you could set the elevation of the View to something above 2dp:
<View
android:elevation="3dp"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#ff0000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>

Try this you need to set android:elevation="" to your View like below code
<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">
<Button
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="start"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:id="#+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:elevation="1dp"
android:text="stop"
android:gravity="center"
android:textColor="#color/colorWhite"
android:textSize="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button" />
<View
android:elevation="4dp"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#ff0000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
</android.support.constraint.ConstraintLayout>
OUTPUT

Categories

Resources