Develop an contact management app (without persistency for now) The main activity would start with no contact, but it has a button where the user could use to add a new contact
On clicking the button in the main activity, it goes to the second activity, where the user could add the contact information such as name, phone number, email, etc.
After entering a new contact, the user could click the submit button in the second activity, which the app will go back to the main activity .
When there is at least one contact, the main activity could display a list of contacts identified by the full name of each contact
In the main activity, a user could click each row of the contact, a third activity would open to display the contact details