Teams Winter 2011/team1/BlackBerry/Add Elements to Main Screen

3. Add Elements to Main (First) Screen

3.1. Open MyScreen.java class.
3.2. Create class Student with the following fields:

    private String firstName;
    private String lastName;
    private String email;
 

3.3. Add an array in MyScreen class to work with data.
3.4. The following elements are added to the MyScreen() constructor. Add a text field:

    add(new AutoTextEditField("Student Name: ", ""));
 

3.5. Add a search button:

    ButtonField _bf=new ButtonField("Search");
    add(_bf);
 

3.6. Add the array of students to the list field:

   ObjectListField olf = new ObjectListField();
   for (int i=0; i< ls.length; i++) {
       olf.insert(i, ls[i].getFirstName() + " " + ls[i].getLastName());
   }      
   add(olf);
 

3.7. Open MyApp class and add menu items inside the constructor. 3.8 Add view, add, edit and delete student options to the menu and set commands to execute:

      MyScreen _mainScreen = new MyScreen();
        MenuItem view = new MenuItem(new StringProvider("View Student"), 100, 1);
        view.setCommand(new Command(new ViewCommandHandler()));
        _mainScreen.addMenuItem(view);
       
        MenuItem adds = new MenuItem(new StringProvider("Add Student"), 200, 2);
        adds.setCommand(new Command(new AddCommandHandler()));
        _mainScreen.addMenuItem(adds);
       
        MenuItem edit = new MenuItem(new StringProvider("Edit Student"), 300, 3);
        edit.setCommand(new Command(new EditCommandHandler()));
        _mainScreen.addMenuItem(edit);
       
        MenuItem delete = new MenuItem(new StringProvider("Delete Student"), 400, 4);
        delete.setCommand(new Command(new DeleteCommandHandler()));
        _mainScreen.addMenuItem(delete);
       
        pushScreen(_mainScreen);
 

3.8. Create inner classes to execute all commands:

   class ViewCommandHandler extends CommandHandler
    {
        public void execute(ReadOnlyCommandMetadata metadata, Object context){
            Dialog.alert("View was selected");
        }
    }
    class AddCommandHandler extends CommandHandler
    {
        public void execute(ReadOnlyCommandMetadata metadata, Object context){
            Dialog.alert("Add was selected");
        }
    }
    class EditCommandHandler extends CommandHandler
    {
        public void execute(ReadOnlyCommandMetadata metadata, Object context){
            Dialog.alert("Edit was selected");
        }
    }
    class DeleteCommandHandler extends CommandHandler
    {
        public void execute(ReadOnlyCommandMetadata metadata, Object context){
            Dialog.alert("Delete was selected");
        }
    }
 

3.9. Now create the all other screen and implement menu commands.