Dialog Notifications or Plain Dialogs

You must have seen a window asking you if you're sure you want to quit the game you're playing without saving your progress. That's nothing but a common dialog notification. Dialog notifications show up in small windows and are generally used to get a user to double check an action, to enter information or to make a simple yes or no decision. They also sometimes used to display a progress bar to the user.

When the Android dialog notification pops up, the user won't be able to work on any other activity until he deals with the dialog window. The dialog freezes the app until the user has made a decision or made a requested change. This functionality of the dialog notification helps protect the integrity of the information the user is feeding to the app. The user can be prompted to double check the information he or she has entered. It also allows the user to go back on a mistaken decision, like if the user presses the exit button on the app accidentally and doesn't really want to exit just yet. A simple "Are you sure you want to Exit?" notification window will save your user a lot of hassle and let him continue using your app.

Take a look at the images below to get an idea of what a dialog notification looks like: