Exercises
1. Change the Hello World app to allow the entering of a first and a last name and display “Hello firstname lastname!” when the button is clicked. Be sure to label the EditTexts to reflect the new data that is to be input.
2. Add a Clear button. The Clear button should remove any data in the EditText(s) and change the display back to “Hello world!”
3. Create a new Android Virtual Device that uses a bigger device to test your app on a different screen size. Run the app using the new AVD.
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