How do you display the Action Bar back button on all Android versions?

AppWidgetProvider is a subclass of

Which class MediaPlayer extends in android?

Which is an Android class for the playback of sound?

how can you check if your activity is first on stack ?

Correct argument passed in the Array.sort() function

Which folder location can be used for layouts to accomodate different screen sizes?

A menu resource file in Java can be referenced as (...)?

To connect list view to array we can use:

Which method sets the layout for the activity?

Which object can be used to display a pop-up message?