Develop Reference

How do I make a button shadow adjacent to the edges of the card?

I made a card with rounded corners, but they cut shadows on the buttons when pressed.
Is there any method to handle this?
The buttons are located in the upper right and lower left corners.
But when I launch the app, I got this:
As you can see, the shadow is not adjacent to the edges of the card.
My code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:id="#+id/networks_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="#dimen/card_horizontal_margin"
android:layout_marginVertical="#dimen/card_vertical_margin"
app:cardBackgroundColor="#color/background_secondary"
app:cardCornerRadius="#dimen/card_corner_radius"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:id="#+id/networks_card_content_wrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/networks_card_content_permanent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="#dimen/card_content_horizontal_margin">
<ImageButton
android:id="#+id/item_card_expand_or_loose_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#color/background_secondary"
android:contentDescription="#string/description_expand_or_loose_card_button"
android:src="#drawable/ic_button_expand"
android:padding="#dimen/card_horizontal_margin"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
...
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/networks_card_hidden_content"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
...
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_settings"
android:backgroundTint="#color/background_secondary"
app:icon="#drawable/ic_settings"
app:layout_constraintTop_toBottomOf="#id/item_card_description"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:paddingStart="#dimen/card_horizontal_margin"
android:paddingBottom="#dimen/card_vertical_margin"
style="?android:attr/borderlessButtonStyle" />
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</RelativeLayout>

Android ConstraintLayout: set one element in the center of another one

I'm using ConstraintLayout in order to create activity view
There is a code snippet:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="vertical"
tools:context=".presentation.screens.registration.RegistrationActivity">
<LinearLayout>...</LinearLayout>
<Button
android:id="#+id/login_next_btn"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="#drawable/button_green_disabled"
android:layout_width="match_parent"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="24dp"
android:text="#string/next"
android:textColor="#color/font_white"
android:textSize="16sp"
android:layout_height="48dp"
android:enabled="false"
android:onClick="onNextClick"/>
<ImageView
android:id="#+id/loader_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="#+id/login_next_btn"
android:src="#drawable/ic_loader"/>
</androidx.constraintlayout.widget.ConstraintLayout>
The question is: How can I set ImageView (android:id="#+id/loader_image") in the center of Button (#+id/login_next_btn)?

Try this:
<ImageView
android:id="#+id/loader_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="#id/login_next_btn"
app:layout_constraintRight_toRightOf="#id/login_next_btn"
app:layout_constraintBottom_toBottomOf="#id/login_next_btn"
app:layout_constraintTop_toTopOf="#id/login_next_btn"
android:src="#drawable/ic_loader"/>

If you have to set it in the center just change the constraints of the image with :
app:layout_constraintBottom_toBottomOf="#id/login_next_btn"
app:layout_constraintTop_toTopOf="#id/login_next_btn"
app:layout_constraintStart_toStartOf="#id/login_next_btn"
app:layout_constraintEnd_toEndOf="#id/login_next_btn"

How to remove default margin of ConstraintLayout in Compound View?

I had created a custom compound view for which a default padding is appearing on the ConstraintLayout
Here is the 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="wrap_content"
android:layout_margin="0dp"
android:background="#color/red_wrong"
android:orientation="vertical"
android:padding="0dp">
<TextView
android:id="#+id/tv_hint"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/ubuntu"
app:layout_constraintBottom_toTopOf="#id/et_input"
app:layout_constraintStart_toStartOf="#id/et_input" />
<EditText
android:id="#+id/et_input"
android:layout_width="0dp"
android:layout_height="#dimen/dimen50"
android:layout_margin="0dp"
android:background="#color/material_yellow50"
android:fontFamily="#font/ubuntu"
android:padding="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/iv_add_view"
android:layout_width="#dimen/dimen20"
android:layout_height="#dimen/dimen20"
app:layout_constraintBottom_toTopOf="#id/et_input"
app:layout_constraintEnd_toEndOf="#+id/et_input"
app:srcCompat="#drawable/ic_add" />
</androidx.constraintlayout.widget.ConstraintLayout>
I have also tried applying 0dp as margin. What I need is to get rid of that bottom margin.

Constraint Layout Vertical Align Center - Two Child Views

I have two TextViews, one above the other. I would like the vertical middle of the two TextViews to be at the same position as the vertical middle of the ImageView. (This is so, regardless of the amount of text that may go into either TextView, everything will always look neat, vertically.)
I created what I need perfectly using two LinearLayouts (as the space above the title is the same as the space beneath the description):
But Android Studio was unable to covert it to ConstraintLayout successfully, as it just dumped the TextViews at the bottom of the layout. I've played with a lot of attributes, but could not quite arrive at the desired layout.
My question is similar to this one, except that I am trying to center_vertical align a pair of views rather than a single one - which means I have no view edge to align to the centre of the ImageView/container.
Is it possible to achieve what I'm after with ConstraintLayout? (I expect I may be able to do it with a single RelativeLayout, but I would like to use the layout_constraintDimensionRatio attribute on my ImageView which presumably leave me needing to use ConstraintLayout.)
In case it helps, here's the code for my aforementioned LinearLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/imageView"
android:layout_width="#dimen/resources_list_image_size"
android:layout_height="#dimen/resources_list_image_size"
android:layout_marginEnd="#dimen/activity_horizontal_margin"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:layout_gravity="center_vertical"
android:contentDescription="#string/resource_image"
android:scaleType="centerCrop"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="vertical">
<TextView
android:id="#+id/textViewTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="#style/MyTextAppearanceMedium"
tools:text="Title" />
<TextView
android:id="#+id/textViewDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="#style/MyTextAppearanceSmall"
tools:text="Description" />
</LinearLayout>
</LinearLayout>
Update: Solution
Thanks to Ben P's answer, this is my final 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="wrap_content">
<!-- Add guideline to align imageView to. -->
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.3" />
<ImageView
android:id="#+id/imageView"
android:layout_width="0dp"
android:layout_height="0dp"
android:contentDescription="#string/resource_image"
android:scaleType="centerCrop"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#id/guideline"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
<TextView
android:id="#+id/textViewTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
app:layout_constraintBottom_toTopOf="#id/textViewDescription"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/imageView"
app:layout_constraintTop_toTopOf="parent"
android:textAppearance="#style/MyTextAppearanceMedium"
app:fontFamily="#font/roboto_slab_regular"
app:layout_constraintVertical_chainStyle="packed"
tools:text="#string/enter_title_colon" />
<TextView
android:id="#+id/textViewDescription"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/imageView"
app:layout_constraintTop_toBottomOf="#id/textViewTitle"
app:fontFamily="#font/roboto_slab_light"
android:textAppearance="#style/MyTextAppearanceSmall"
tools:text="Description" />
</androidx.constraintlayout.widget.ConstraintLayout>

It sounds like you could solve this problem by using a packed chain anchored to the top and bottom of the ImageView. You'll also need to use horizontal bias and a constrained width in order to get wrapping to work correctly.
<?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">
<View
android:id="#+id/anchor"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_margin="64dp"
android:background="#caf"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintVertical_chainStyle="packed"
app:layout_constraintHorizontal_bias="0"
app:layout_constrainedWidth="true"
app:layout_constraintTop_toTopOf="#id/anchor"
app:layout_constraintStart_toEndOf="#id/anchor"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="#id/two"/>
<TextView
android:id="#+id/two"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintHorizontal_bias="0"
app:layout_constrainedWidth="true"
app:layout_constraintTop_toBottomOf="#id/one"
app:layout_constraintStart_toEndOf="#id/anchor"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="#id/anchor"/>
</androidx.constraintlayout.widget.ConstraintLayout>
The important attributes here are:
app:layout_constraintVertical_chainStyle="packed" on the first view, which causes the two textviews to stack right on top of each other
app:layout_constraintHorizontal_bias="0" on both views, which means that when the text is not long enough to reach the edge of the screen it will stick to the edge of the anchor view
app:layout_constrainedWidth="true" on both views, which prevents the textview from ever being wider than its constraints, and so the text wraps to a new line

If you want to use ConstraintLayout you could use something like 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">
<ImageView
android:id="#+id/imageView"
android:layout_width="200dp"
android:layout_height="200dp"
android:contentDescription="description"
android:scaleType="centerCrop"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="#+id/imageView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/imageView"
app:layout_constraintTop_toTopOf="#+id/imageView">
<TextView
android:id="#+id/textViewTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:text="Title" />
<TextView
android:id="#+id/textViewDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:text="Description" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

You can use this layout:
<?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/textView2"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#color/colorAccent"
android:text="I am 5% of the screen height"
app:layout_constraintBottom_toTopOf="#+id/textView3"
app:layout_constraintEnd_toEndOf="#+id/textView3"
app:layout_constraintHeight_percent="0.05"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="#+id/textView3"
app:layout_constraintTop_toTopOf="#+id/imageView2" />
<TextView
android:id="#+id/textView3"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.15"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:background="#color/colorPrimary"
android:text="I am 15% of the screen height (And the image is 20% screen size in height) "
app:layout_constraintBottom_toBottomOf="#+id/imageView2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/imageView2"
app:layout_constraintTop_toBottomOf="#+id/textView2" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.20"
app:layout_constraintDimensionRatio="1:1"
android:scaleType="fitXY"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/rose" />
</android.support.constraint.ConstraintLayout>
It will look like this:
One important thing about this layout:
You can control your aspect ratio (for the image) with app:layout_constraintDimensionRatio="x:y" and by passing "1:1" make it square
And by the way - I am using support library for no reason on this example, you can use androidx

How to put text on right centre of image view on constraint layout

Following is a part of my whole xml of constraint Layout.
<ImageView
android:id="#+id/img_apn_not_set"
style="#style/DeviceManagementImageView"
android:contentDescription="#string/app_name"
android:src="#drawable/ic_sos"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/view1" />
<TextView
android:id="#+id/tv_apn_not_set"
style="#style/DeviceManagementHeaderText"
android:text="Apn not set"
android:layout_marginTop="5dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/img_apn_not_set"
app:layout_constraintTop_toTopOf="#+id/img_apn_not_set" />
What I am trying to do is get the text view on exact centre on the right side of image view. In linear layout we achieve it mostly by gravity. Here I am using marginTop to achieve the same . So can I do the same by using any property . Is there a property something like rightOfCentreOf ?
Thanks

pls add one line in your textview
app:layout_constraintBottom_toBottomOf="#+id/img_apn_not_set"
also remove android:layout_marginTop="5dp"
hope it help you

Try this, If you want to move the text to the right or left use Horizontal bias, If you want to move your text to the top or bottom use vertical bias.
<TextView
android:id="#+id/tv_apn_not_set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="#string/app_name"
app:layout_constraintBottom_toBottomOf="#+id/img_apn_not_set"
app:layout_constraintEnd_toEndOf="#+id/img_apn_not_set"
app:layout_constraintHorizontal_bias="0.63"
app:layout_constraintStart_toStartOf="#+id/img_apn_not_set"
app:layout_constraintTop_toTopOf="#+id/img_apn_not_set" />

Try this
<?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:orientation="vertical">
<ImageView
android:id="#+id/AmountLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher_background"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBaseline_toBaselineOf="#id/Amount"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/Amount"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:text="NILESH"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="#id/AmountLabel"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
RESULT

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/img_apn_not_set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/ic_launcher"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/tv_apn_not_set"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Apn not set"
app:layout_constraintBottom_toBottomOf="#+id/img_apn_not_set"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/img_apn_not_set"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

You can use app:layout_constraintWidth_default="wrap" and give all 4 side constraint it will be at center
Example:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/img_apn_not_set"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/app_name"
android:src="#drawable/ic_launcher_foreground"
app:layout_constraintLeft_toLeftOf="parent" />
<TextView
android:id="#+id/tv_apn_not_set"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Apn not set"
app:layout_constraintWidth_default="wrap"
app:layout_constraintTop_toTopOf="#+id/img_apn_not_set"
app:layout_constraintBottom_toBottomOf="#+id/img_apn_not_set"
app:layout_constraintLeft_toRightOf="#+id/img_apn_not_set"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>
It will look like this