Code to Quit or Exit Android Application

Question

I have an application where on the home page I have buttons for navigation through the application.

On that page I have a button "EXIT" which when clicked should take the user to the home screen on the phone where the application icon is.

How can I do that?

Solution

Android's design does not favor exiting an application by choice, but rather manages it by the OS. You can bring up the Home application by its corresponding Intent:

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

I added the following code to my quitGame function in my MainActivity.java file and it worked

 /** Called when the user clicks the Quit Game button */ 

 public void quitGame(View view) 

{
        // Do something in response to button

 Intent intent = new Intent(Intent.ACTION_MAIN);

 intent.addCategory(Intent.CATEGORY_HOME); 

 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 

 startActivity(intent); 

 } //end function quitGame