How to set layout weight in ConstraintLayout

Question

I have 4 views & I need to divide them in group of 2 & then make them cover spread in the area.

I have try using Group & chainStyle but nothing could satisfy 100%.

I want,

I have managed to make this,

Code for the same is given below,

<?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="wrap_content"
android:background="@color/colorBtnPink"
android:paddingTop="@dimen/_10sdp"
android:padding="@dimen/_10sdp">

<ImageView
    android:id="@+id/ivFb"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFbDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_facebook"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvFacebook"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFacebook"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_facebook"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivFb"
    app:layout_constraintTop_toTopOf="parent" />


<ImageView
    android:id="@+id/ivTwitter"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnTwDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/tvFacebook"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_twitter"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvTwitter"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnTwitter"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_twitter"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivTwitter"
    app:layout_constraintTop_toTopOf="parent" />
 </android.support.constraint.ConstraintLayout>

Answer 1

Its simple, to use chainStyle, you must to given start & end constraints(if chainStyle=horizontal) whereas top and bottom constraints for chainStyle=vertical

Answer 2

Apply Following Steps:

1. Select your widget and set chains to Horizontal
2. Select your widget and set it to Horizontally Center
3. Select your widget and set it to Organise (Expand Horizontally).

Answer 3

You should modify your code as below

<?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="wrap_content">

<ImageView
   android:id="@+id/ivFb"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginStart="32dp"
   android:clickable="false"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintEnd_toStartOf="@+id/tvFacebook"
   app:layout_constraintHorizontal_bias="0.0"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toStartOf="parent"
   app:layout_constraintTop_toTopOf="parent"
   app:srcCompat="@drawable/ic_android_black_24dp"
   tools:ignore="ContentDescription" />

<TextView
   android:id="@+id/tvFacebook"
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_marginEnd="16dp"
   android:clickable="false"
   android:gravity="center"
   android:text="Facebook"
   app:layout_constraintBottom_toBottomOf="@+id/ivFb"
   app:layout_constraintEnd_toStartOf="@+id/ivTwitter"
   app:layout_constraintHorizontal_bias="0.5"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toEndOf="@+id/ivFb"
   app:layout_constraintTop_toTopOf="parent" />


<ImageView
   android:id="@+id/ivTwitter"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginStart="16dp"
   android:clickable="false"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintEnd_toStartOf="@+id/tvTwitter"
   app:layout_constraintHorizontal_bias="0.5"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toEndOf="@+id/tvFacebook"
   app:layout_constraintTop_toTopOf="parent"
   app:srcCompat="@drawable/ic_android_black_24dp"
   tools:ignore="ContentDescription" />

 <TextView
   android:id="@+id/tvTwitter"
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_marginEnd="32dp"
   android:clickable="false"
   android:gravity="center"
   android:text="Twitter"
   app:layout_constraintBottom_toBottomOf="@+id/ivTwitter"
   app:layout_constraintEnd_toEndOf="parent"
   app:layout_constraintHorizontal_bias="0.5"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toEndOf="@+id/ivTwitter"
   app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

It will look like

I modified your code for arranging elements in constraint layout, Now you can modify the code as per your need :)

Answer 4

Here is the solution :

<?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_marginTop="8dp"
    android:layout_height="wrap_content">
<RelativeLayout
    android:id="@+id/button_savewd"
    android:layout_width="0dp"
    android:layout_height="50dp"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="4dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:background="#3b5998"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toLeftOf="@+id/asdfsff"
    tools:ignore="RtlCompat">
    <ImageView
        android:id="@+id/button_save"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:text="Facebook"
        tools:ignore="ContentDescription" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/button_save"
        android:layout_toRightOf="@+id/button_save"
        android:background="@color/white"
        android:text="facebook"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/button_save"
        app:layout_constraintRight_toRightOf="parent" />
</RelativeLayout>
<RelativeLayout
    android:id="@+id/asdfsff"
    android:layout_width="0dp"
    android:layout_height="50dp"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginStart="4dp"
    android:background="#444"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toRightOf="@+id/button_savewd"
    app:layout_constraintRight_toRightOf="parent"
    tools:ignore="RtlCompat">
    <ImageView
        android:id="@+id/img_twitter"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:src="@drawable/logo_0"
        android:text="Facebook"
        tools:ignore="ContentDescription" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/img_twitter"
        android:layout_toRightOf="@+id/img_twitter"
        android:text="Twitter"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/img_twitter"
        app:layout_constraintRight_toRightOf="parent" />
     </RelativeLayout>
 </android.support.constraint.ConstraintLayout>

setting the width of each item to 0dp or MATCH_CONSTRAINT lets the views fill the parent (optional)

Output :

Answer 5

You can also use guideLines property something like 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="wrap_content"
android:background="@color/colorBtnPink"
android:padding="@dimen/_10sdp"
android:paddingTop="@dimen/_10sdp">

<ImageView
    android:id="@+id/ivFb"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFbDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_facebook"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvFacebook"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFacebook"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_facebook"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivFb"
    app:layout_constraintRight_toLeftOf="@id/ivTwitter"
    app:layout_constraintTop_toTopOf="parent" />


<android.support.constraint.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.5" />


<ImageView
    android:id="@+id/ivTwitter"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:layout_marginLeft="8dp"
    android:layout_marginStart="8dp"
    android:background="@color/colorBgBtnTwDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/tvFacebook"
    app:layout_constraintStart_toStartOf="@+id/guideline2"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_twitter"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvTwitter"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnTwitter"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_twitter"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivTwitter"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout> 

See if this completes your requirement.