How to add different weight to ConstraintLayout views

Question

In my layout, I have a ConstraintLayout containing two TextView elements. They are currently the same size, but I would like them to have different weights with a 6:4 ratio.

How can this be achieved in my ConstraintLayout?

Answer 1

In XML

Create a horizontal chain, and then use the app:layout_constraintHorizontal_weight attribute:

<?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">      <TextView         android:id="@+id/one"         android:layout_width="0dp"         android:layout_height="48dp"         android:background="#caf"         app:layout_constraintLeft_toLeftOf="parent"         app:layout_constraintRight_toLeftOf="@+id/two"         app:layout_constraintHorizontal_weight="6"/>      <TextView         android:id="@+id/two"         android:layout_width="0dp"         android:layout_height="48dp"         android:background="#fac"         app:layout_constraintLeft_toRightOf="@+id/one"         app:layout_constraintRight_toRightOf="parent"         app:layout_constraintHorizontal_weight="4"/>  </android.support.constraint.ConstraintLayout> 

In Java

Create your views and add them to the parent ConstraintLayout. You will need to give them each an id in order for everything to work; you can use View.generateViewId() or you can define an id resource for them.

// this will be MATCH_CONSTRAINTS width and 48dp height int height = (int) (getResources().getDisplayMetrics().density * 48); ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(0, height);  View left = new View(this); left.setId(R.id.one); parent.addView(left, params);  View right = new View(this); right.setId(R.id.two); parent.addView(right, params); 

Then create a ConstraintSet object and create your chain:

ConstraintSet set = new ConstraintSet(); set.clone(parent);  int[] chainIds = { R.id.one, R.id.two }; // the ids you set on your views above float[] weights = { 6, 4 }; set.createHorizontalChain(ConstraintSet.PARENT_ID, ConstraintSet.LEFT,                           ConstraintSet.PARENT_ID, ConstraintSet.RIGHT,                           chainIds, weights, ConstraintSet.CHAIN_SPREAD);  set.applyTo(parent); 

Answer 2

After some research I fount other solution with guideline view.

<?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:id="@+id/main" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@android:color/white">  <TextView     android:id="@+id/textView3"     android:layout_width="0dp"     android:layout_height="wrap_content"     android:background="@color/green_color"     android:fontFamily="@font/overpass_light"     android:textAllCaps="true"     android:textColor="@color/dark_grey_button"     android:textSize="@dimen/h5"     app:layout_constraintEnd_toStartOf="@+id/guideline"     app:layout_constraintStart_toStartOf="parent"/>  <TextView     android:id="@+id/textView4"     android:layout_width="0dp"     android:layout_height="wrap_content"     android:background="@color/grey_text"     android:fontFamily="@font/overpass_light"     android:textAllCaps="true"     android:textColor="@color/dark_grey_button"     android:textSize="@dimen/h5"     app:layout_constraintBottom_toBottomOf="parent"     app:layout_constraintEnd_toEndOf="parent"     app:layout_constraintStart_toStartOf="@+id/guideline"     app:layout_constraintTop_toTopOf="parent"/>  <android.support.constraint.Guideline     android:id="@+id/guideline"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:orientation="vertical"     app:layout_constraintGuide_percent="0.6"     />     </android.support.constraint.ConstraintLayout> 

here is the screen shot for above layout. you have to just drag the guideline view.