How to add different weight to ConstraintLayout views
AndroidAndroid LayoutAndroid ConstraintlayoutAndroid Problem Overview
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
?
Android Solutions
Solution 1 - Android
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);
Solution 2 - Android
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.
Solution 3 - Android
You can also use app:layout_constraintWidth_percent
to achieve the view you desire.
<?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">
<TextView
android:id="@+id/textView1"
android:layout_width="0dp"
android:layout_height="50dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_percent="0.6"
android:text="6"
android:textStyle="bold"
android:textAlignment="center"
android:paddingTop="15dp"
android:background="#ffb7b7"/>
<TextView
android:id="@+id/textView2"
android:layout_width="0dp"
android:layout_height="50dp"
app:layout_constraintStart_toEndOf="@id/textView1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_percent="0.4"
android:text="4"
android:textStyle="bold"
android:textAlignment="center"
android:paddingTop="15dp"
android:background="#b7b8ff"/>
</androidx.constraintlayout.widget.ConstraintLayout>
Below is the screen for the above layout
If you need to put the views in vertical orientation then you can use app:layout_constraintHeight_percent
and put android:layout_height
as 0dp in that case.
Solution 4 - Android
You can apply chaining spread_inside with giving weight in views using app:layout_constraintHorizontal_weight