Self-Review Exercises

9.1 Fill in the blanks in each of the following statements:

a) To sell your apps on Google Play, you’ll need a(n)__________ merchant account.

b) Before uploading your app to a device, to Google Play or to other app marketplaces, you must digitally sign the .apk file (Android app package file) using a(n) __________ that identifies you as the author of the app.

c) The Google Play __________ allows you to manage your account and your apps, check users’ star ratings for your apps (0 to 5 stars), track the overall number of installs of each app and the number of active installs (installs minus uninstalls).

9.2 State whether each of the following is true or false. If false, explain why.

a) When an app works perfectly using the emulator on your computer, it will run on your Android device.

b) You might use a licensing policy to limit how often the app checks in with the server, how many simultaneous device installs are allowed, and what happens when an unlicensed app is identified.

c) The title of your app as it will appear in Google Play must be unique among all Android apps.

d) According to a study by app store analytics firm Distimo (www.distimo.com/), the average price of paid Android game apps is around $36.20.

e) According to Google, apps that use in-app billing earn profoundly more revenue than paid apps alone.

f) If you choose to sell your apps through other app marketplaces, several third-party mobile payment providers can enable you to build in-app purchase into your apps using APIs from mobile payment providers.