Constraint Layout in Android

  • You’ll also need to add the dependancy for the ConstraintLayout from the support library:

compile
'com.android.support.constraint:constraint-layout:1.0.0-alpha1'

The aim of the ConstraintLayout is to help reduce the number of nested views, which will improve the performance of our layout files. 


<?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/viewTop"
        android:layout_width="0dp"
        android:layout_height="100dp"
        android:layout_marginTop="16dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_default="percent"
        app:layout_constraintWidth_percent="0.7"
        app:layout_constraintHeight_default="percent"
        app:layout_constraintHeight_percent="0.5"
        />




    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guidelineRight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.50" />

    <View
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@+id/guidelineRight"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:background="@android:color/darker_gray"
        />

</androidx.constraintlayout.widget.ConstraintLayout>

-------------------------------------------------------------------------

<?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/viewTop"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_bright"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_default="percent"
        app:layout_constraintWidth_percent="0.7"
        app:layout_constraintHeight_default="percent"
        app:layout_constraintHeight_percent="0.5"
        />




    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guidelineRight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.50" />

    <View
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@+id/guidelineRight"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:background="@android:color/darker_gray"
        />

</androidx.constraintlayout.widget.ConstraintLayout>

Comments

Post a Comment