Android Hello World Application

"Hello World" application. That will display "Hello World" in the middle of the screen in the red color with white background.

Now Here We will create a android application that will display "Hello world" in the middle of the screen.

Create a Hello Application with empty activity.

and Write below mentioned code in your "activity_main.xml" file.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:gravity="center"
    android:background="#ffffff"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textSize="30sp"
        android:gravity="center"
        android:textColor="#FF0000"/>

</LinearLayout>

    In this application we are not doing anything in MainActivity.java file.