"Android app: Find prime numbers"

About:

"Android app: Find prime numbers" is a simple android project for learning the basics of mobile software development on Java.

Task 1:

Create the app that:

• Has 6 buttons with random numbers, that you can tap;
• Give a toast with certain signal after a tap;
• Also has 2 buttons with additional windows about developers and about prime numbers.

Task 1. Result visualisation:

• Working app with positive and negative toasts

• Additional windows

Task 2:

Add features to the app:

• Landscape mode
• App should save the "Guess session" after changing phone orientation or switching to another app;

Task 2. Result visualisation:

• Saving guess state in landscape mode and after switching

Task 3:

Add features to the app:

• Extra help window with hint;
• Tracking help and extra help usage;

Task 3. Result visualisation:

• New toast messages after help and extra help usage

Final visualisation