ConstraintLayout

ConstraintLayout allows you to create large and complex layouts with a flat view hierarchy (no nested view groups). It's similar to RelativeLayout in that all views are laid out according to relationships between sibling views and the parent layout, but it's more flexible than RelativeLayout and easier to use with Android Studio's Layout Editor. It's more efficient for nested layouts.

Setup

To Import the constraintLayout library add the following depency

build.gradle

dependencies {
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
}

Creating The Layout

the xml tag used

<?xml version="1.0" encoding="uft-8"?>
<android.support.constraint.ConstrainLayout
    ...
>
</android.support.constraint.ConstrainLayout>

Resources

• reference
• guide to responsive design