Question

This assignment is about creating the Rolodex application that contains the contact information. Each contact information includes:

• First name

• Last name

• Middle name (optional)

• Phone number

The Rolodex application will use SharedPreferences for data persistent operations:

• Retrieve Rolodex records

• Add a new Rolodex record

• Update the existing Rolodex record

• Delete the selected Rolodex record

The Rolodex application uses Fragment and DialogFragment. In addition, the Rolodex records are displayed in the ListView view. The ListView view is set to be single-selection mode.

Each row in the ListView view is another layout. The layout for each row contains two TextView views.

• The top TextView view contains the name of the contact, starting the last name, then the comma, and followed by the first name and middle name.

• The bottom TextView view contains the phone number.

No duplicate records would be allowed.

• Figure #1 – This is the application tool bar. There are three buttons: Add, Update, and Delete. Clicking on the Add button will display the Add Rolodex dialog. Clicking on the Update button will display the Update Rolodex dialog. Clicking on the Delete button will delete the currently selected list row.

• Figure #2 – This is the main screen which appears when the application starts up. If there are any Rolodex records created previously, these records will be retrieved and displayed in the ListView view.

• Figure #3 – This is the Add Rolodex DialogFragment, which prompts the user to enter the Rolodex data as shown. The text hints are displayed in the TextView views. As the user enters the data, the text hints will disappear and only show the texts as entered by the user. On this dialog, there are two buttons (CANCEL and OK). The OK button will add the new Rolodex data into the SharedPreferences. The main ListView view will then be refreshed automatically to include the newly added Rolodex record. The CANCEL button will close down the dialog and no new Rolodex record will be added to the SharedPreferenes.

• Figure #4 – This is the Update Rolodex DialogFragment. The data from the selected row will be populated here. The user can make the changes. On this dialog, there are two buttons (CANCEL and OK). The OK button will update the selected Rolodex data in the SharedPreferences. The main ListView view will then be refreshed automatically to include the newly updated Rolodex record. The CANCEL button will close down the dialog and no changes will be updated to the SharedPreferenes.

• Figure #5 – The CONFIRMATION DialogFragment is displayed when the user attempts to delete the selected Rolodex record in the ListView view. On this dialog, there are two buttons (CANCEL and OK). The OK button will delete the selected Rolodex data from the SharedPreferences. The main ListView view will then be refreshed automatically to include the current Rolodex data obtained from the SharedPrefereces. The CANCEL button will close down the dialog and no changes will be updated to the SharedPreferenes.

In JAVA.

Answer 1