13. Exercise: Hello Android

Now it’s your turn to complete this exercise.

In this exercise, you will modify the text shown on the screen to say Hello Android.

**1. Open the MainActivity layout file and change the “Hello World!” to “Hello Android!”: **

You can do this by changing the text attribute in the XML:

android:text="Hello Android"

No other changes are needed! Since this exercise was so quick, we don't have a code step. But your final activity_main.xml code should look like:

<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"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Android!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Reference documentation

• setContentView