Using Constraint Layout for Custom views - android

I am using the drag and drop functionality in the layout editor to try and get 4 image buttons aligned in a kite shape. This is the layout I am trying to achieve, currently using ImageButton but I will change to the circular image view to suit the layout later.
Can anyone help me to achieve this. Please find my XML below:
<android.support.constraint.ConstraintLayout
android:id="#+id/ongoing_call_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="#dimen/activity_padding"
android:layout_below="#id/contact_number_tv"
android:layout_above="#id/calculator_layout">
<ImageButton
android:id="#+id/home_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="120dp"
android:src="#android:drawable/btn_star"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/not_billable_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="104dp"
android:src="#android:drawable/btn_star"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/billable_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#android:drawable/btn_star"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="#+id/not_billable_imgBtn"
tools:layout_editor_absoluteY="105dp" />
<ImageButton
android:id="#+id/decide_later_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="120dp"
android:src="#android:drawable/btn_star"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</android.support.constraint.ConstraintLayout>


Try this buddy, and make your own adjustments.
<android.support.constraint.ConstraintLayout
android:id="#+id/ongoing_call_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="#dimen/activity_padding"
android:layout_below="#id/contact_number_tv"
android:layout_above="#id/calculator_layout">
<ImageButton
android:id="#+id/home_imgBtn"
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:src="#android:drawable/btn_star"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.32"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/not_billable_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:src="#android:drawable/btn_star"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/billable_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:src="#android:drawable/btn_star"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.66"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="#+id/decide_later_imgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="60dp"
android:layout_marginBottom="24dp"
android:src="#android:drawable/btn_star"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/not_billable_imgBtn" />
</android.support.constraint.ConstraintLayout>
See the example image
But perhaps your real problem is that the constrainLayout is not your root element, and you should set a fixed height instead of android:layout_height="wrap_content"

Related

How to remove the line that appears under each card in card view?

I have a problem with the line that appears under each card as shown in this picture. Is there any way to remove it, or is it not possible?
Also, how can I present each card with a different color for example (purple and yellow)?
This is my 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"
tools:context=".benReqView">
<Button
android:id="#+id/button15"
android:layout_width="32dp"
android:layout_height="32dp"
android:background="#drawable/chat2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.6"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.977" />
<Button
android:id="#+id/benReqback"
android:layout_width="25dp"
android:layout_height="22dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="16dp"
android:background="#drawable/leftarrow"
app:layout_constraintBottom_toTopOf="#+id/signupDon"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.021"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.073" />
<TextView
android:id="#+id/benReqEmpty"
android:layout_width="150dp"
android:layout_height="23dp"
android:layout_marginStart="20dp"
android:layout_marginTop="2dp"
android:layout_marginEnd="20dp"
android:text=""
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.086" />
<ListView
android:id="#+id/benReqListView"
android:layout_width="401dp"
android:layout_height="539dp"
android:layout_marginBottom="2dp"
android:background="#fafafa"
app:layout_constraintBottom_toTopOf="#+id/imageView8"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
</ListView>
<TextView
android:id="#+id/textView23"
android:layout_width="136dp"
android:layout_height="24dp"
android:fontFamily="#font/tajawalmedium2"
android:text="حالة الطلبات"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.022" />
<ImageView
android:id="#+id/imageView8"
android:layout_width="414dp"
android:layout_height="60dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0"
app:srcCompat="#drawable/footer" />
<Button
android:id="#+id/benReqToprofile"
android:layout_width="32dp"
android:layout_height="32dp"
android:background="#drawable/userr"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.82"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.977" />
<Button
android:id="#+id/benReqToHomeicon"
android:layout_width="37dp"
android:layout_height="37dp"
android:background="#drawable/home"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.17"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.988" />
<Button
android:id="#+id/benReq"
android:layout_width="39dp"
android:layout_height="40dp"
android:background="#drawable/request"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.38"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.981" />
</androidx.constraintlayout.widget.ConstraintLayout>

I suspect that the line you're talking about is the ListView's background appearing between your cards.
Try removing this line: android:background="#fafafa"
By the way, I suggest you to use a RecyclerView instead of ListView

You can remove the ListView's dividers by setting the divider's height to 0dp. Add the following lines to your ListView:
android:dividerHeight="0dp"
android:divider="#null"

Why ImageView not Displaying in Activity Android Studio

I'm using constraintlayout and I have an activity that is a user profile. and it includes a picture of user. when I code xml layout. I can see the picture in preview window inside android studio the image is a png image. I have tried changing the image to one of the android studio avatar. still doesn't work. however, when I run the app the picture is not displaying. does anyone know why this happen?
<?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:background="#color/profileBackground">
<android.support.constraint.ConstraintLayout
android:id="#+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginBottom="8dp"
android:background="#drawable/bacround_gradient"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.001">
<TextView
android:id="#+id/name_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="72dp"
android:layout_marginEnd="8dp"
android:fontFamily="sans-serif-condensed-medium"
android:text="Amanda Bozquet"
android:textAlignment="center"
android:textColor="#color/headerTextColor"
android:textSize="25sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
<ImageView
android:id="#+id/user_imageview"
android:layout_width="126dp"
android:layout_height="109dp"
android:layout_marginStart="8dp"
android:layout_marginTop="144dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:src="#drawable/prifile_pic" />
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:paddingBottom="20dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/user_imageview"
app:layout_constraintVertical_bias="0.275">
<TextView
android:id="#+id/occupation_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:text="Marine Biologist"
android:textSize="20sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/workplace_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:text="Key Biscaine National Park"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/occupation_textview" />
<TextView
android:id="#+id/state_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:text="FL, USA"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/workplace_textview" />
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:layout_marginEnd="8dp"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/state_textview">
<ImageView
android:id="#+id/email_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="40dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.126"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/state_textview"
app:srcCompat="#drawable/ic_mail_black_24dp" />
<TextView
android:id="#+id/email_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="40dp"
android:layout_marginEnd="8dp"
android:text="abozquet#biscainepark.org"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.031"
app:layout_constraintStart_toEndOf="#+id/email_imageview"
app:layout_constraintTop_toBottomOf="#+id/state_textview" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout">
<ImageView
android:id="#+id/phone_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.126"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/email_imageview"
app:srcCompat="#drawable/ic_local_phone_black_24dp" />
<TextView
android:id="#+id/phone_textview"
android:layout_width="239dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="184dp"
android:text="1 (786) 352-2254"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.031"
app:layout_constraintStart_toEndOf="#+id/phone_imageview"
app:layout_constraintTop_toBottomOf="#+id/email_textview" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout2">
<ImageView
android:id="#+id/video_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.126"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/phone_imageview"
app:srcCompat="#drawable/ic_videocam_white_24dp" />
<TextView
android:id="#+id/video_textview"
android:layout_width="242dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="184dp"
android:text="1 (786) 352-2254"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.031"
app:layout_constraintStart_toEndOf="#+id/video_imageview"
app:layout_constraintTop_toBottomOf="#+id/phone_textview" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout3">
<ImageView
android:id="#+id/facebook_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.126"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/video_textview"
app:srcCompat="#drawable/ic_icon_facebook" />
<TextView
android:id="#+id/facebook_textview"
android:layout_width="336dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="184dp"
android:text="http://facebook.com/amandab"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.031"
app:layout_constraintStart_toEndOf="#+id/facebook_imageview"
app:layout_constraintTop_toBottomOf="#+id/video_textview" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout4">
<ImageView
android:id="#+id/twitter_imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.126"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/facebook_textview"
app:srcCompat="#drawable/ic_twitter_white" />
<TextView
android:id="#+id/twitter_textview"
android:layout_width="336dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="20dp"
android:layout_marginEnd="184dp"
android:text="\#mandabuz48"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.031"
app:layout_constraintStart_toEndOf="#+id/twitter_imageview"
app:layout_constraintTop_toBottomOf="#+id/facebook_textview" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>

From: https://developer.android.com/studio/write/tool-attributes
Android Studio supports a variety of XML attributes in the tools
namespace that enable design-time features (such as which layout to
show in a fragment) or compile-time behaviors (such as which shrinking
mode to apply to your XML resources). When you build your app, the
build tools remove these attributes so there is no effect on your APK
size or runtime behavior.
So the attribute:
tools:src="#drawable/prifile_pic"
is valid only for design-time.
It is not compiled in the APK and you will not see the image when you run the app.
Change it to:
app:srcCompat="#drawable/prifile_pic"

Do any of your ImageViews display the intended images? Your profile pic ImageView is using tools:src while others are using app:srcCompat
I just noticed a potential typo too -
tools:src="#drawable/prifile_pic" <<--- supposed to be profile_pic?

Are you getting any exception in your android studio log-cat, like image not found? As Stitches wrote in above comment --> typo error for prifile_pic, please check you drawable name is same in your xml layout and image name in drawable folder.

NestedScrollView Having Constraint Layout not scrolling

My xml is composed by one constraint layout. Inside this there are 2 buttons and 1 nested scroll view. Inside the ScrollView there are various elements including recycle view. I would like that the recycle view not scroll but scroll only the nested scroll view. I have disabled the scroll of recycle view in this mode
(recyclerView.setNestedScrollingEnabled(false);)
but the problem is that the nested scroll view not scrolling. Can you help me?
I attach the code below.
The code start in this mode :
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:id="#+id/azzera"
android:layout_width="120dp"
android:layout_height="40dp"
android:layout_marginStart="40dp"
android:layout_marginBottom="28dp"
android:background="#drawable/rounded_4lati"
android:backgroundTint="#color/azzurro"
android:elevation="#dimen/dimen8"
android:paddingTop="#dimen/dimen8"
android:text="#string/azzera"
android:textAlignment="center"
android:textColor="#FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/conferma"
android:layout_width="120dp"
android:layout_height="40dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="28dp"
android:background="#drawable/rounded_4lati"
android:backgroundTint="#color/azzurro"
android:paddingTop="#dimen/dimen8"
android:text="#string/conferma"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:elevation="#dimen/dimen8"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
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="wrap_content">
<View
android:id="#+id/view1"
android:layout_width="0dp"
android:layout_height="48dp"
android:background="#color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="#+id/view2"
android:layout_width="0dp"
android:layout_height="48dp"
android:layout_marginTop="16dp"
android:background="#color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/view1" />
<View
android:id="#+id/view3"
android:layout_width="0dp"
android:layout_height="48dp"
android:layout_marginTop="16dp"
android:background="#color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/view2" />
<TextView
android:id="#+id/mostraPreferiti"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:text="#string/mostraPreferiti"
android:textColor="#color/black"
android:textSize="18sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/view3" />
<TextView
android:id="#+id/creditiEcm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="10dp"
android:text="#string/creditiECM"
android:textColor="#color/black"
android:textSize="18sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/view1" />
<EditText
android:id="#+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:inputType="number"
android:hint="#string/zero"
android:text="#string/editText"
android:textStyle="bold"
app:layout_constraintStart_toEndOf="#+id/creditiEcm"
app:layout_constraintTop_toTopOf="#+id/view1"
android:autofillHints="" />
<Button
android:id="#+id/buttonMeno"
android:layout_width="36dp"
android:layout_height="36dp"
android:layout_marginTop="6dp"
android:layout_marginEnd="16dp"
android:background="#drawable/ic_remove_circle_azzurro_24dp"
android:gravity="center"
android:textAlignment="gravity"
android:textColor="#color/azzurro"
android:textSize="24sp"
app:layout_constraintEnd_toStartOf="#+id/buttonPiu"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/buttonPiu"
android:layout_width="36dp"
android:layout_height="36dp"
android:layout_marginTop="6dp"
android:layout_marginEnd="32dp"
android:background="#drawable/ic_add_circle_azzurro_24dp"
android:gravity="center"
android:textAlignment="gravity"
android:textColor="#color/azzurro"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/mostraCorsiPassati"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="#string/mostraCorsiPassati"
android:textColor="#color/black"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="#+id/view2"
app:layout_constraintTop_toTopOf="#+id/view2" />
<Switch
android:id="#+id/switch_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginEnd="32dp"
android:theme="#style/SwitchTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="#+id/view2" />
<Switch
android:id="#+id/switch_button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginEnd="32dp"
android:theme="#style/SwitchTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="#+id/view3" />
<android.support.v7.widget.AppCompatTextView
android:id="#+id/professioni"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="90dp"
android:layout_marginEnd="8dp"
android:text="#string/professione2"
android:textColor="#color/black"
android:textSize="18sp"
android:textStyle="bold"
app:fontFamily="#font/sanfrancisco"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/mostraCorsiPassati" />
<SearchView
android:id="#+id/searchBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:background="#fff"
android:elevation="2dp"
app:layout_constraintHorizontal_bias="0.557"
app:layout_constraintLeft_toRightOf="parent"
app:layout_constraintRight_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/professioni"
app:queryHint="Cerca..">
</SearchView>
<android.support.v7.widget.RecyclerView
android:id="#+id/listProfessioni"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/searchBar"
android:orientation="vertical"
>
</android.support.v7.widget.RecyclerView>
<TextView
android:id="#+id/professioniNonDisponibili"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:text="#string/professioniNonDisponibili"
android:textAlignment="center"
android:textColor="#color/gray"
android:textSize="18sp"
app:autoSizeMaxTextSize="#dimen/dimen20"
app:autoSizeMinTextSize="#dimen/dimen12"
app:autoSizeTextType="uniform"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/error" />
<ImageView
android:id="#+id/error"
android:layout_width="#dimen/dimen80"
android:layout_height="#dimen/dimen80"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="#drawable/ic_error_outline_gray_24dp"
android:contentDescription="#string/TODO"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/searchBar"
app:layout_constraintVertical_bias="0.105" />
<ProgressBar
android:id="#+id/progress"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_marginStart="8dp"
android:layout_marginTop="24dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:alpha="1"
android:minWidth="80dp"
android:minHeight="80dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/searchBar"
app:layout_constraintVertical_bias="0.168" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>

As i answered in comments
For Someone other facing same problem. This might help.
For some reasons ScrollView doesn't scroll when having ConstraintLayout inside it.
For Workaround we can use LinearLayout or RelativeLayoutinstead of ConstraintLayout inside ScrollView. OR
As OP does put the ConstraintLayout inside Linear or Relative Layout does the trick.

According to Ali Ahmed's answer, a ScrollView doesn't scroll if you have a ConstraintLayout inside it. Well that's not true. I have been using ConstraintLayout inside ScrollView and everything works perfectly fine. Well the problem with the code that you posted is that you are using 0dpas the layout_height of your RecyclerView. 0dp means match_parent. You should be using wrap_content as your layout_height. So that the RecyclerView expands its height according to the elements in it. Doing so will make your code work fine.

View is not visible in Constraint layout

In the Constraint layout I have a Button and on top of it is an Image View(id==R.id.imageView) which is aligned center-right area of the Button.The background of the Image View is a white colored right arrow. In design view and in my device the Image View is not displayed. I cleaned and build the project but the problem persists.In the Image below the blue rectangular portion is then area where the Image should be displayed.Please provide a solution for this...
Design Preview:
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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/head"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/ph_verify_lbl_mrgn"
android:text="#string/verify_your_phone_number"
android:textColor="#bb2b67"
android:textSize="#dimen/ph_verify_head_tsxtsze"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="4dp"
android:text="#string/lorem_ipsum_lorem_ipsum"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/head" />
<EditText
android:id="#+id/editText"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:hint="#string/ph_hint"
android:inputType="number"
android:paddingTop="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView" />
<ImageView
android:id="#+id/imageView"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:background="#drawable/arrow"
app:layout_constraintBottom_toBottomOf="#+id/button"
app:layout_constraintEnd_toEndOf="#+id/button"
app:layout_constraintHorizontal_bias="0.909"
app:layout_constraintStart_toStartOf="#+id/button"
app:layout_constraintTop_toTopOf="#+id/button"
app:layout_constraintVertical_bias="0.571" />
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="89dp"
android:layout_marginTop="16dp"
android:background="#drawable/button_bg"
android:text="#string/next"
android:textColor="#ffffff"
android:textSize="22sp"
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/editText"
app:layout_constraintVertical_bias="0.25" />
</android.support.constraint.ConstraintLayout>

Place the ImageView tag below the Button tag.
Since you have provided match parent to the button and set the constraints to fill horizontally, the ImageView is being overlapped.
You can test it by keeping property of Button clickable="false" and put a click listener on the ImageView
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="89dp"
android:layout_marginTop="16dp"
android:background="#drawable/button_bg"
android:text="#string/next"
android:textColor="#ffffff"
android:textSize="22sp"
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/editText"
app:layout_constraintVertical_bias="0.25" />
<ImageView
android:id="#+id/imageView"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:background="#drawable/arrow"
app:layout_constraintBottom_toBottomOf="#+id/button"
app:layout_constraintEnd_toEndOf="#+id/button"
app:layout_constraintHorizontal_bias="0.909"
app:layout_constraintStart_toStartOf="#+id/button"
app:layout_constraintTop_toTopOf="#+id/button"
app:layout_constraintVertical_bias="0.571" />
UPDATE
Also if this does not work, put an elevation to the ImageView
android:elevation="2dp"

Constraint layout leaving space On top

I have a fragment containing a layout
<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"
android:fitsSystemWindows="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp"
tools:context="tech.pkg.name.fragments.ReportFragment">
<android.support.constraint.ConstraintLayout
android:id="#+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimaryDark"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<Spinner
android:id="#+id/typeSlector"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout2" />
<android.support.constraint.ConstraintLayout
android:id="#+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:background="#drawable/android_date_bgd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/fromTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="#string/from"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/fromDateTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:drawablePadding="5dp"
android:padding="5dp"
android:text="#string/dd_mm_yy"
android:textStyle="bold"
app:layout_constraintBaseline_toBaselineOf="#+id/fromTextView"
app:layout_constraintEnd_toStartOf="#+id/view9"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toEndOf="#+id/fromTextView"
app:layout_constraintTop_toTopOf="#+id/fromTextView" />
<View
android:id="#+id/view9"
android:layout_width="1dp"
android:layout_height="0dp"
android:layout_marginBottom="4dp"
android:layout_marginTop="4dp"
android:background="#android:color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/toTextView"
app:layout_constraintStart_toEndOf="#+id/fromDateTextView"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="#+id/toTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/to"
android:textStyle="bold"
app:layout_constraintBaseline_toBaselineOf="#+id/fromDateTextView"
app:layout_constraintEnd_toStartOf="#+id/toDateTextView"
app:layout_constraintStart_toEndOf="#+id/view9" />
<TextView
android:id="#+id/toDateTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:drawablePadding="5dp"
android:padding="5dp"
android:text="#string/dd_mm_yy"
android:textStyle="bold"
app:layout_constraintBaseline_toBaselineOf="#+id/toTextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/toTextView" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
<RadioGroup
android:id="#+id/radioGroup"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:orientation="horizontal"
android:padding="10dp"
android:theme="#style/AppTheme.RadioButton"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView8"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1">
<RadioButton
android:id="#+id/mobileRadioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="20dp"
android:layout_weight="0.20"
android:checked="true"
android:text="Mobile"
android:textSize="18sp" />
<RadioButton
android:id="#+id/DTHradioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="0.14"
android:text="DTH"
android:textSize="18sp" />
</RadioGroup>
<Button
android:id="#+id/button_view_report"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="#drawable/button_bgd"
android:text="#string/submit"
android:textColor="#color/colorAccent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/view5"
app:layout_constraintVertical_bias="0.0" />
<View
android:id="#+id/view5"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginEnd="10dp"
android:layout_marginRight="15dp"
android:background="#color/colorEditTextLine"
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/radioGroup" />
<CheckBox
android:id="#+id/downloadCheck"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:theme="#style/AppTheme.Checkbox"
app:layout_constraintHorizontal_bias="0.088"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout" />
<TextView
android:id="#+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:text="#string/download"
app:layout_constraintBaseline_toBaselineOf="#+id/downloadCheck"
app:layout_constraintHorizontal_bias="0.02"
app:layout_constraintLeft_toRightOf="#+id/downloadCheck"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>
it is containing in
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
But in the layout editor it is showing
How can I remove the spacing above?

The problem is with your Activity where you had inflated the Fragment. Actually, i tried it on My system and I'm Getting Proper result.
Check Your Activity's Layout where the FrameLayout is Used.
2nd Possbility
Check your May be Your Theme is Changing this . Check all the possibilities

Try the following code Replacing the ConstraintLayout after the Spinner
<android.support.constraint.ConstraintLayout
android:id="#+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#drawable/android_date_bgd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">

What happened to me was smiliar, a space on top that did not show in the editor.
The problem was not in the main layout file I was focusing on, I was displaying some fragments thru a viewpager and the margins on the editor for the pager were 0 so the editor preview did not showed a space on top. However the fragments that were being created/shown had of course a different layout file and in that layout there was a huge space on top because I erroneously thought centering the layout vertically was a good idea for some reason (mainly because I code at night before bed and sometimes im too tired lol). Since the layout height for the viewpager did not match the dimensions of the fragment I had some weird behaviors trying to position the elements of the main layout file.

I was facing a similar problem. By looking at the code snippet in the question I saw the similarity that we both have android:fitsSystemWindows set to True. By removing this android:fitsSystemWindows attribute, my space at the top was removed.

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