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Modern Android App Development with Kotlin

Building Layout of Login Screen

Explore how to build a user-friendly login screen layout using Kotlin in Android. Understand the use of ConstraintLayout and Material Components like TextInputLayout and MaterialButton, how to align and chain views for a polished design, and apply margins for spacing. This lesson helps you create a functional and visually appealing login interface tailored for modern Android development.

We'll cover the following...

Final result preview

To give you an idea of what we want to achieve, here is a preview of the layout that we are going to build.

Root layout

Let’s create a new activity_login.xml layout file inside the app/src/main/res/layout folder. As a root layout, we are going to use ConstraintLayout:

XML
<androidx.constraintlayout.widget.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">
</androidx.constraintlayout.widget.ConstraintLayout>

Input fields

While Android SDK provides the EditText view as an input field, we are going to use TextInputLayout and its direct child TextInputEditText from the Material Components library because of the richer API and better visual parity with Material Design.

Let’s declare username TextInputLayout and TextInputEditText inside ConstraintLayout along with some specific XML attributes:

  • The id attribute is used to uniquely identify and
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