How to chain views when guideline is present

How to chain views when guideline is present - android

I am trying to build an activity which has a guideline in it and I also want to chain elements in the activity.
When I do spread value for app:layout_constraintVertical_chainStyle property, it works fine.
However if I change a value to packed, that's where everything that is attached to a guideline on one side follows the chain and a guideline and the other side does not.
How can I achieve that both sides follows the same rules. On the second image I want a riht side of the guidline to be alliged the same way as the left side
spread
packed
<?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:layout_editor_absoluteY="81dp">
<TextView
android:id="#+id/txt_title_label"
style="#style/text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Title"
app:layout_constraintBottom_toTopOf="#id/txt_title"
app:layout_constraintStart_toStartOf="#id/txt_title" />
<EditText
android:id="#+id/txt_title"
style="#style/add_step"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
app:layout_constraintBottom_toTopOf="#id/txt_description"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="packed"/>
<TextView
android:id="#+id/txt_description_label"
style="#style/text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Description"
app:layout_constraintBottom_toTopOf="#id/txt_description"
app:layout_constraintStart_toStartOf="#id/txt_description" />
<EditText
android:id="#id/txt_description"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#id/spn_milestone"
app:layout_constraintEnd_toEndOf="#id/txt_title"
app:layout_constraintStart_toStartOf="#id/txt_title"
app:layout_constraintTop_toBottomOf="#id/txt_title" />
<TextView
android:id="#+id/txt_milestone_label"
style="#style/text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Select Milestone"
app:layout_constraintBottom_toTopOf="#id/spn_milestone"
app:layout_constraintStart_toStartOf="#id/spn_milestone" />
<Spinner
android:id="#+id/spn_milestone"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="20dp"
app:layout_constraintBottom_toTopOf="#id/txt_start_day"
app:layout_constraintEnd_toEndOf="#id/guideline"
app:layout_constraintStart_toStartOf="#id/txt_description"
app:layout_constraintTop_toBottomOf="#id/txt_description" />
<TextView
android:id="#+id/txt_priority_label"
style="#style/text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Priority"
app:layout_constraintBottom_toTopOf="#id/spn_priority"
app:layout_constraintStart_toStartOf="#id/spn_priority" />
<Spinner
android:id="#+id/spn_priority"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
app:layout_constraintBottom_toTopOf="#id/txt_end_date"
app:layout_constraintEnd_toEndOf="#id/txt_description"
app:layout_constraintStart_toStartOf="#id/guideline"
app:layout_constraintTop_toBottomOf="#id/txt_description" />
<TextView
android:id="#+id/txt_start_date_label"
style="#style/text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start Day"
app:layout_constraintBottom_toTopOf="#id/txt_start_day"
app:layout_constraintStart_toStartOf="#id/txt_start_day" />
<EditText
android:id="#+id/txt_start_day"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="date"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#id/spn_milestone"
app:layout_constraintStart_toStartOf="#id/spn_milestone"
app:layout_constraintTop_toBottomOf="#id/spn_milestone" />
<TextView
android:id="#+id/txt_end_date_label"
style="#style/text_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="End Date"
app:layout_constraintBottom_toTopOf="#id/txt_end_date"
app:layout_constraintStart_toStartOf="#id/txt_end_date" />
<EditText
android:id="#+id/txt_end_date"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#id/spn_priority"
app:layout_constraintStart_toStartOf="#id/spn_priority"
app:layout_constraintTop_toBottomOf="#id/spn_priority" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
</androidx.constraintlayout.widget.ConstraintLayout>

Related

Constraint layout in Custom Dialog problem

I have such XML file for custom Dialog:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:paddingHorizontal="15dp"
android:paddingVertical="10dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/cl_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
android:paddingBottom="15dp">
<TextView
style="#style/tv_big"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="#id/cl_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Filter"/>
<com.google.android.material.button.MaterialButton
android:id="#+id/bt_reset"
android:textColor="#color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#style/Widget.MaterialComponents.Button.OutlinedButton"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="#id/cl_header"
android:text="RESET FILTERS"/>
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/cl_distance"
app:layout_constraintTop_toBottomOf="#id/cl_header"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tv_distance_title"
style="#style/tv_medium"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Distance range"/>
<TextView
android:id="#+id/tv_distance_result"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="#id/tv_distance_title"
app:layout_constraintLeft_toRightOf="#id/tv_distance_title"
app:layout_constraintRight_toRightOf="parent"
android:background="#ddd"
android:padding="3dp"
android:textColor="#333"
android:text="0 km - 500km"/>
<com.google.android.material.slider.RangeSlider
android:id="#+id/slider_distance"
app:layout_constraintTop_toBottomOf="#id/tv_distance_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:labelBehavior="gone"
android:stepSize="1.0" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/cl_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/cl_distance"
app:layout_constraintStart_toStartOf="parent">
<TextView
android:id="#+id/tv_location_title"
style="#style/tv_medium"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Location"/>
<EditText
android:id="#+id/et_location"
android:layout_height="wrap_content"
android:layout_width="match_parent"
app:layout_constraintTop_toBottomOf="#id/tv_location_title"
android:hint="#string/filter_location_et_hint" />
</androidx.constraintlayout.widget.ConstraintLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/cl_location"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginTop="10dp"
android:orientation="horizontal">
<Button
android:id="#+id/bt_cancel"
android:backgroundTint="#ccc"
android:textColor="#color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:text="CANCEL"/>
<Button
android:id="#+id/bt_save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="save"
android:layout_marginHorizontal="20dp"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Android Studio renders it in this way:
And this is what I want to have in my Dialog.
BUT:
On physical device and on emulator it looks different than in Android Studio:
My question is: how to place "Filter" title on the left, and make the location EditText matching the parent (in the working app)?

What everybody else said is correct, keeping your layout flat is good for both performance and for these situations where you want to quickly figure out why isn't the layout being laid out the way you wanted it ;)
Try this :
<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:paddingHorizontal="15dp"
android:paddingVertical="10dp">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="start"
android:text="Filter"
app:layout_constraintBottom_toBottomOf="#id/bt_reset"
app:layout_constraintEnd_toStartOf="#id/bt_reset"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#id/bt_reset" />
<com.google.android.material.button.MaterialButton
android:id="#+id/bt_reset"
style="#style/Widget.MaterialComponents.Button.OutlinedButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RESET FILTERS"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/tv_distance_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Distance range"
app:layout_constraintBottom_toBottomOf="#id/tv_distance_result"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#id/tv_distance_result" />
<TextView
android:id="#+id/tv_distance_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:background="#ddd"
android:gravity="center"
android:paddingHorizontal="18dp"
android:paddingVertical="3dp"
android:text="0 km - 500km"
android:textColor="#333"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/bt_reset" />
<com.google.android.material.slider.RangeSlider
android:id="#+id/slider_distance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stepSize="1.0"
app:labelBehavior="gone"
app:layout_constraintTop_toBottomOf="#id/tv_distance_result" />
<TextView
android:id="#+id/tv_location_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Location"
app:layout_constraintTop_toBottomOf="#id/slider_distance" />
<EditText
android:id="#+id/et_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="test"
app:layout_constraintTop_toBottomOf="#id/tv_location_title" />
<Button
android:id="#+id/bt_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginEnd="20dp"
android:backgroundTint="#ccc"
android:text="CANCEL"
android:textColor="#color/colorBlack"
app:layout_constraintEnd_toStartOf="#id/bt_save"
app:layout_constraintTop_toBottomOf="#id/et_location" />
<Button
android:id="#+id/bt_save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginEnd="20dp"
android:text="save"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/et_location" />
</androidx.constraintlayout.widget.ConstraintLayout>

I changed inner ConstraintLayouts into LinearLayouts and used weights. I also used this trick to fill space between e.g. "Filter" title and "reset filters" button.
There was also an issue with ll_location LinearLayout - it didn't match the parent.
I replaced:
<LinearLayout
android:id="#+id/ll_location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/ll_distance_ext"
android:orientation="vertical">
<!-- content -->
</LinearLayout>
into:
<LinearLayout
android:id="#+id/ll_location"
android:layout_width="0dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/ll_distance_ext"
android:orientation="vertical">
<!-- content -->
</LinearLayout>
And then it worked.
The reason why I don't want to use flat layout (why I use nested layouts) is that IMHO the flat layout makes the code more difficult to maintain.
When you have Views splited into groups you can easily replace them, no matter how many View there are in a group.
My solution:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:paddingHorizontal="15dp"
android:paddingVertical="10dp">
<LinearLayout
android:id="#+id/ll_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
android:paddingBottom="15dp">
<TextView
style="#style/tv_big"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Filter"/>
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<com.google.android.material.button.MaterialButton
android:id="#+id/bt_reset"
android:textColor="#color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#style/Widget.MaterialComponents.Button.OutlinedButton"
android:text="reset filters"/>
</LinearLayout>
<LinearLayout
android:id="#+id/ll_distance_ext"
app:layout_constraintTop_toBottomOf="#id/ll_header"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/tv_distance_title"
style="#style/tv_medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Distance range"/>
<View
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<TextView
android:id="#+id/tv_distance_result"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:textAlignment="center"
android:background="#ddd"
android:padding="3dp"
android:textColor="#333"
android:text="0 km - 500km"/>
</LinearLayout>
<com.google.android.material.slider.RangeSlider
android:id="#+id/slider_distance"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:labelBehavior="gone"
android:stepSize="1.0" />
</LinearLayout>
<LinearLayout
android:id="#+id/ll_location"
android:layout_width="0dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/ll_distance_ext"
android:orientation="vertical">
<TextView
android:id="#+id/tv_location_title"
style="#style/tv_medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Location"/>
<EditText
android:id="#+id/et_location"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:hint="#string/filter_location_et_hint" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="#id/ll_location"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginTop="10dp"
android:orientation="horizontal">
<Button
android:id="#+id/bt_cancel"
android:backgroundTint="#ccc"
android:textColor="#color/black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:text="cancel"/>
<Button
android:id="#+id/bt_save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="save"
android:layout_marginHorizontal="20dp"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

View get packed in ConstraintLayout, Views run out of screen in LinearLayout

I am implementing a signup/login screen like below
I have tried this using ConstraintLayout like below
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="16dp"
tools:context=".MainActivity">
<ImageView
android:id="#+id/img"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_marginBottom="72dp"
android:src="#drawable/ic_launcher_background"
app:layout_constraintBottom_toTopOf="#+id/btn1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="packed" />
<Button
android:id="#+id/btn1"
android:layout_width="0dp"
android:layout_height="56dp"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp"
android:layout_marginBottom="12dp"
android:text="Button 1"
app:layout_constraintBottom_toTopOf="#+id/btn2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/img" />
<Button
android:id="#+id/btn2"
android:layout_width="0dp"
android:layout_height="56dp"
android:layout_marginBottom="48dp"
android:text="Button 2"
app:layout_constraintBottom_toTopOf="#+id/txt_already_member"
app:layout_constraintEnd_toEndOf="#+id/btn1"
app:layout_constraintStart_toStartOf="#+id/btn1"
app:layout_constraintTop_toBottomOf="#+id/btn1" />
<TextView
android:id="#+id/txt_already_member"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Already Member? Sign In"
android:textSize="16sp"
app:layout_constraintBottom_toTopOf="#+id/txt_agreement"
app:layout_constraintEnd_toEndOf="#+id/btn2"
app:layout_constraintStart_toStartOf="#+id/btn2"
app:layout_constraintTop_toBottomOf="#+id/btn2" />
<TextView
android:id="#+id/txt_agreement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="By continuing you agree to our terms and privacy policy"
android:layout_marginTop="32dp"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
Summary of XML:
Vertical chain is applied on four top most views
vertical chain style is set to packed
last text view is constraint to bottom and sides
margin is set on views to separate items.
Problem is when I run this on my phone, bottom text views get tight packed as shown here.
Next I tried LinearLayout like below
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:gravity="center_horizontal"
android:layout_margin="16dp"
android:layout_height="match_parent">
<ImageView
android:id="#+id/img"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_marginBottom="72dp"
android:layout_marginTop="72dp"
android:src="#drawable/ic_launcher_background"/>
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp"
android:layout_marginBottom="8dp"
android:text="Button 1" />
<Button
android:id="#+id/btn2"
android:layout_width="match_parent"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp"
android:layout_height="56dp"
android:layout_marginBottom="32dp"
android:text="Button 2" />
<TextView
android:id="#+id/txt_already_member"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Already Member? Sign In"
android:textSize="16sp"
android:layout_weight="1"/>
<TextView
android:id="#+id/txt_agreement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="By continuing you agree to our terms and privacy policy "
android:textSize="12sp"/>
</LinearLayout>
In this case bottom text views are not visible as shown here.
My device resolution is 720 * 1280 pixels.
I suppose the problem is with the hard margins. How could I make the screen look like in the sketch above, regardless of screen height? either using LinearLayout or ConstraintLayout?

I would recommend you you use all screen densities rather than one for this you can use the famous library SDP or follow the guideline provided by android.
Second use Guideline class for Constraintlayout.
Here is the sample code snippet you can also use this one.
<?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:layout_margin="16dp">
<ImageView
android:id="#+id/img"
android:layout_width="#dimen/_200sdp"
android:layout_height="#dimen/_200sdp"
android:layout_marginTop="16dp"
android:src="#drawable/ic_launcher"
app:layout_constraintBottom_toTopOf="#+id/btn1"
app:layout_constraintEnd_toStartOf="#+id/right"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="#+id/left"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/btn1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button 1"
app:layout_constraintBottom_toTopOf="#+id/btn2"
app:layout_constraintEnd_toStartOf="#+id/right"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="#+id/left"
app:layout_constraintTop_toBottomOf="#+id/img" />
<Button
android:id="#+id/btn2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button 2"
app:layout_constraintBottom_toTopOf="#+id/txt_already_member"
app:layout_constraintEnd_toStartOf="#+id/right"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="#+id/left"
app:layout_constraintTop_toBottomOf="#+id/btn1" />
<TextView
android:id="#+id/txt_already_member"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Already Member? Sign In"
android:textSize="16sp"
app:layout_constraintBottom_toTopOf="#+id/divider"
app:layout_constraintEnd_toStartOf="#+id/right"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="#+id/left"
app:layout_constraintTop_toBottomOf="#+id/btn2" />
<TextView
android:id="#+id/txt_agreement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:text="By continuing you agree to our terms and privacy policy"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/right"
app:layout_constraintStart_toStartOf="#+id/left"
app:layout_constraintTop_toTopOf="#+id/divider"
app:layout_constraintVertical_bias="1.0" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="#dimen/_16sdp" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_end="#dimen/_16sdp" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/divider"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintGuide_percent="0.7"
app:layout_constraintTop_toBottomOf="#+id/txt_already_member" />

Actually solution to my problem is using Guidelines in ConstraintLayout with Guidelines app:layout_constraintGuide_percentattribute and constraining the views to Guidelines.
Since value for app:layout_constraintGuide_percent is a percentage rather than a dp value, it works responsively regardless of screen width/height.
example :
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="16dp"
tools:context=".MainActivity">
<ImageView
android:id="#+id/img"
android:layout_width="250dp"
android:layout_height="200dp"
android:src="#drawable/ic_launcher_background"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline4" />
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:text="Button 1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline5" />
<Button
android:id="#+id/btn2"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_marginTop="8dp"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:text="Button 2"
app:layout_constraintEnd_toEndOf="#+id/btn1"
app:layout_constraintStart_toStartOf="#+id/btn1"
app:layout_constraintTop_toBottomOf="#+id/btn1" />
<TextView
android:id="#+id/txt_already_member"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:text="Already Member? Sign In"
android:textSize="16sp"
app:layout_constraintBottom_toTopOf="#+id/txt_agreement"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/btn2" />
<TextView
android:id="#+id/txt_agreement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:text="By continuing you agree to our terms and privacy policy "
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent=".1" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent=".6" />
</androidx.constraintlayout.widget.ConstraintLayout>
Thank you very much Rehan Sarwar for remembering me about Guidelines.

Why do the buttons goes up?

So I programmed a simple app with android studio and the layout that is shown in the app when I run it is different than the xml file I designed.
Here is a link of an image of the problem.
https://imgur.com/6JIHSQ7
<?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=".MainActivity">
<Button
android:id="#+id/subBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/subBtn"
android:textSize="30sp"
app:layout_constraintBaseline_toBaselineOf="#+id/addBtn"
app:layout_constraintStart_toStartOf="#+id/divBtn" />
<Button
android:id="#+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="36dp"
android:layout_marginLeft="36dp"
android:layout_marginBottom="42dp"
android:text="#string/addBtn"
android:textSize="30sp"
app:layout_constraintBottom_toTopOf="#+id/multBtn"
app:layout_constraintStart_toEndOf="#+id/subBtn" />
<EditText
android:id="#+id/n1EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="56dp"
android:ems="10"
android:hint="#string/number1"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.444"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/n2EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="39dp"
android:ems="10"
android:hint="#string/number2"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="#+id/n1EditText"
app:layout_constraintTop_toBottomOf="#+id/n1EditText" />
<Button
android:id="#+id/multBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="108dp"
android:layout_marginRight="108dp"
android:layout_marginBottom="336dp"
android:text="#string/multBtn"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<Button
android:id="#+id/divBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="88dp"
android:layout_marginLeft="88dp"
android:layout_marginBottom="336dp"
android:text="#string/divBtn"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/resultTextView"
android:layout_width="174dp"
android:layout_height="73dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:background="#color/colorPrimaryDark"
android:text="#string/resultView"
android:textColor="#color/colorPrimary"
android:textSize="50sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.455"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/n2EditText"
app:layout_constraintVertical_bias="0.637" />
</androidx.constraintlayout.widget.ConstraintLayout>
I think it might be related to the virtual device i'm using but I don't know if that's the problem.

The problem is, your addBtn and subBtn are not aware of the n2EditText. The addBtn depends on the divBtn and the divBtn is placed 336dp above the bottom edge of the screen.
If you need the addBtn to appear below the n2EditText then you need to add a vertical constraint connecting to the n2EditText. Once your buttons are connected to their immediate top elements, you don't need to add the bottom constraint to the bottom edge of the screen.
Imagine a ConstraintLayout as a collection of widgets hanging down from the top of the screen, each tied to the immediately top elements with the chains called "constraints". You don't need to tie the bottom widget to the ground unless it is required by design.
Here is the modified layout:
<?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">
<Button
android:id="#+id/subBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"
android:textSize="30sp"
android:layout_marginTop="16dp"
app:layout_constraintTop_toBottomOf="#+id/n2EditText"
app:layout_constraintStart_toStartOf="#+id/n2EditText"/>
<Button
android:id="#+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+"
android:textSize="30sp"
app:layout_constraintStart_toEndOf="#+id/subBtn"
app:layout_constraintTop_toTopOf="#+id/subBtn"
android:layout_marginStart="16dp"/>
<EditText
android:id="#+id/n1EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="56dp"
android:ems="10"
android:hint="n1"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/n2EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:hint="n2"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="#+id/n1EditText"
app:layout_constraintTop_toBottomOf="#+id/n1EditText"/>
<Button
android:id="#+id/multBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="*"
android:textSize="30sp"
app:layout_constraintStart_toEndOf="#+id/divBtn"
android:layout_marginStart="16dp"
app:layout_constraintTop_toTopOf="#+id/divBtn"/>
<Button
android:id="#+id/divBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="/"
android:textSize="30sp"
app:layout_constraintStart_toStartOf="#+id/subBtn"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="#+id/subBtn"/>
<TextView
android:id="#+id/resultTextView"
android:layout_width="174dp"
android:layout_height="73dp"
android:layout_marginBottom="8dp"
android:background="#color/colorPrimaryDark"
android:text="res"
android:textColor="#color/colorPrimary"
android:textSize="50sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="#+id/divBtn"/>
</androidx.constraintlayout.widget.ConstraintLayout>
Anyway, when you have a lot of widgets, you may have to use a ScrollView to accommodate them all.

Try this
<?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=".MainActivity">
<Button
android:id="#+id/subBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="52dp"
android:layout_marginEnd="25dp"
android:layout_marginRight="25dp"
android:text="submit"
android:textSize="30sp"
app:layout_constraintEnd_toStartOf="#+id/addBtn"
app:layout_constraintHorizontal_chainStyle="packed"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/n2EditText" />
<Button
android:id="#+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:text="add"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/subBtn"
app:layout_constraintTop_toBottomOf="#+id/n2EditText" />
<EditText
android:id="#+id/n1EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="52dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:ems="10"
android:hint="1"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.439"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/n2EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="2dp"
android:layout_marginLeft="2dp"
android:layout_marginTop="36dp"
android:ems="10"
android:hint="2"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="#+id/n1EditText"
app:layout_constraintTop_toBottomOf="#+id/n1EditText" />
<Button
android:id="#+id/multBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="44dp"
android:text="mult"
android:textSize="30sp"
app:layout_constraintStart_toEndOf="#+id/subBtn"
app:layout_constraintTop_toBottomOf="#+id/addBtn" />
<Button
android:id="#+id/divBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="44dp"
android:layout_marginEnd="48dp"
android:layout_marginRight="48dp"
android:text="div"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="#+id/subBtn"
app:layout_constraintTop_toBottomOf="#+id/subBtn" />
<TextView
android:id="#+id/resultTextView"
android:layout_width="174dp"
android:layout_height="73dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="48dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="#color/colorPrimaryDark"
android:text="resultView"
android:textColor="#color/colorPrimary"
android:textSize="50sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.547"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/divBtn" />
</androidx.constraintlayout.widget.ConstraintLayout>

Probably on your layout editor and phone screen sizes are different. Use ConstraintLayout or some other add constraints to views

I cannot say definitly just looking at image but i think you are using facing problem because of your layout. Use LinearLayout to fix it.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" />
<!-- EditText: number1 -->
<!-- EditText Number2 -->
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!-- 2 Buttons here -->
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!-- 2 Buttons here -->
</LinearLayout>
</LinearLayout>

Some general tips that can help:
Check the constraints if you're using ConstraintLayout or relatives between view if you're using RelativeLayout;
Check the values and the units of views;
Check the screen resolution of your "Preview" pane and Emulator.
If it's possible to provide some additional information about the layout that is used, if these tips didn't help.
In preview pane you can find info about resolutions here:
In the emulator pane you can simple see the sizes in the column:

How to place buttons in relative layout correctly

I have relative layout where are some textviews added. They are displaying data from sqlite database.
I want to place two buttons that will be always placed below last result.
Please check images for more understanding.
Here is code for design:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="ID = "
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#050505" />
<TextView
android:id="#+id/textViewID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/textView1"
android:layout_alignBottom="#+id/textView1"
android:layout_toRightOf="#+id/textView1"
android:text="UserID"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#050505" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView1"
android:text="Name = "
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#050505" />
<TextView
android:id="#+id/textViewNAME"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textViewID"
android:layout_toRightOf="#+id/textView2"
android:text="Name"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#050505" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView2"
android:text="Nazov DVD = "
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#050505" />
<TextView
android:id="#+id/textViewDvd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/textView3"
android:layout_toRightOf="#+id/textView3"
android:text="phone number"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#050505" />
</RelativeLayout>
It's displaying now like this:
And I want to display two buttons (edit and delete buttons) that will be displayed always below last result like this:
I checked other articles but I really don't know how to apply it to my code.

This can be done really fast with ConstraintLayout and guidlines.
So you have said that you want your button to be below the last result - use RecyclerView to show your list of result, put a horizontal guideline and give it app:layout_constraintGuide_percent="0.your percent so you can decide what will be the recyclerview height.
Here is an example:
<?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">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:text="Edit"
app:layout_constraintBottom_toBottomOf="#+id/button2"
app:layout_constraintEnd_toStartOf="#+id/button2"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/button2" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:text="Delete"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="#+id/button"
app:layout_constraintTop_toBottomOf="#+id/recyclerView" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="#color/black"
app:layout_constraintBottom_toTopOf="#+id/guideline3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.8" />
At the end it will look like this:
Now, remember that this is just an example and you can change it from the look of things, color, size, position on the screen and so on.

how to make android activity to fit in all size of mobile display's?

I have aligned it perfectly in the android studio but when I'm running it, it goes out of order, I have tried in a smartphone as well as in emulator but the result is same.is there any way I can make it display in mobile the same the way I see in the android studio?
The pic that I have uploaded shows that in android studio the display looks perfectly fine but after running its position changes.
this is the 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"
android:background="#drawable/wm"
tools:context="sanal.gmail.android.PetCare.doctorassignment">
<ImageView
android:id="#+id/imageView9"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_marginTop="36dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/petownerde" />
<ImageView
android:id="#+id/imageView11"
android:layout_width="match_parent"
android:layout_height="38dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout6"
app:srcCompat="#drawable/pet" />
<EditText
android:id="#+id/editText10"
android:layout_width="213dp"
android:layout_height="142dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="472dp"
android:background="#drawable/button"
android:ems="10"
android:gravity="top|left"
android:hint="Type your message here"
android:inputType="textMultiLine"
android:lines="10"
android:maxLength="160"
android:maxLines="5"
android:minLines="6"
android:scrollbars="vertical"
android:singleLine="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.036"
tools:layout_editor_absoluteX="99dp" />
<Button
android:id="#+id/button5"
android:layout_width="88dp"
android:layout_height="44dp"
android:layout_marginBottom="60dp"
android:layout_marginEnd="162dp"
android:layout_marginLeft="161dp"
android:layout_marginRight="162dp"
android:layout_marginStart="161dp"
android:layout_marginTop="19dp"
android:background="#drawable/button1"
android:onClick="sendmessage"
android:text="SEND"
android:textColor="#F6F6F6"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/editText10" />
<LinearLayout
android:id="#+id/linearLayout5"
android:layout_width="match_parent"
android:layout_height="168dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="8dp"
android:orientation="horizontal"
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/imageView11"
app:layout_constraintVertical_bias="0.049">
<LinearLayout
android:id="#+id/linearLayout4"
android:layout_width="84dp"
android:layout_height="160dp"
android:orientation="vertical">
<TextView
android:id="#+id/textView21"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:text="Pet name :"
android:textSize="18sp" />
<TextView
android:id="#+id/textView22"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:text="Breed :"
android:textSize="18sp" />
<TextView
android:id="#+id/textView23"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:text="Colour :"
android:textSize="18sp" />
<TextView
android:id="#+id/textView24"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:text="Age :"
android:textSize="18sp" />
<TextView
android:id="#+id/textView25"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Gender :"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:id="#+id/textView13"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Pet name"
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView14"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="breed"
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView15"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="colour"
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView16"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="age"
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView17"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="gender"
android:textColor="#F6F6F6"
android:textSize="18sp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout6"
android:layout_width="match_parent"
android:layout_height="136dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="31dp"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="#+id/imageView11"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView9">
<LinearLayout
android:id="#+id/linearLayout3"
android:layout_width="79dp"
android:layout_height="126dp"
android:orientation="vertical">
<TextView
android:id="#+id/textView18"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:text="Name :"
android:textSize="18sp" />
<TextView
android:id="#+id/textView10"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:text="Email :"
android:textSize="18sp" />
<TextView
android:id="#+id/textView9"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:text="Contact : "
android:textSize="18sp" />
<TextView
android:id="#+id/textView8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Address : "
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/textView7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="name"
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="email "
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView11"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="phone number"
android:textColor="#F6F6F6"
android:textSize="18sp" />
<TextView
android:id="#+id/textView12"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="address"
android:textColor="#F6F6F6"
android:textSize="18sp" />
</LinearLayout>
</LinearLayout>
`

Follow these two links You will get your answer. Its a time consuming approach but definitely you will learn a lot from these links.
http://developer.android.com/training/multiscreen/screensizes.html
http://developer.android.com/guide/practices/screens_support.html
Making fully responsive your android application to all screen sizes is not a very tough job but it requires good knowledge and experience of layouts and there XML properties.

use RelativeLayout instead of constraintLayout
and give the perfectly position of your views they cant change view your layout
use property of RelativeLayout -> below , above , toLeftOf , toRightOf
and set your other component
and also height and width all component not fixed given..
your requirement fixed size then given fixed otherwise use match_parent and wrap_content
one important things for your layout either you can use scrollview coz your edittext and button are mess ... OR your component size given small then not mess your layout
also you can fixed size or density used then use Dependency SDP and SSP

For android there are several ways to make it Compatible with all the devices.
You can use the ConstraintLayout for more responsive activity instead of LinearLayout.
Apart from that use more flexible and adaptive layout like "match_parent", "wrap_content" instead of hard coded values.
For example -
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:margin_top="5sp"
And so on. I hope this will solve your problem.
For more info related to this you can check this link

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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