add(olf);
</pre>
3.8. Open <code>MyApp</code> class and add menu items inside the constructor.
3.9 Add view, add, edit and delete student options to the menu and set commands to execute:
<pre>
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);
</pre>
3.10. Create inner classes to execute all commands:
<pre>
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");
}
}
</pre>
3.11. Now create the all other screen and implement menu commands.
