Prompt

Open the file you saved from the Module Three assignment in Android Studio, then edit the MainActivity.java file.

Specifically, you must address the following rubric criteria:

Create a function that displays a greeting. In Android Studio, create a new public function named "SayHello$()"$ that returns a void. The function will need to accept a View as a parameter. Within the function, ensure that it displays a message and check that the contents of nameText are not null.

Create validation of the elements and inputs. To complete this task you must do all of the following:

If the content of nameText is not null, write "Hello" and the contents of nameText to textGreeting.

If the content of nameText is null, write "You must enter a name" to textGreeting.

On activity$\_$main.xml$,$ set the "onClick of buttonSayHello" to "SayHello$()".$

Dynamically enable and disable the button for appropriate situations. For buttonSayHello, the following pattern should be created:

Dynamically disable buttonSayHello if there is no text in nameText.

Dynamically enable buttonSayHello when text is entered in nameText.