Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Průvodce řešením problémů stáhnout pdf (Strana 71)

3: Storing data

Code sample: Storing and viewing restaurant information

This code sample lets BlackBerry® device users save information about multiple restaurants and view information

about the most recently saved restaurant.

Example: Restaurants.java

/**

* Restaurants.java

package com.rim.samples.docs.restaurants;

import net.rim.device.api.ui.*;

import net.rim.device.api.ui.component.*;

import net.rim.device.api.ui.container.*;

import net.rim.device.api.system.*;

import net.rim.device.api.util.*;

import java.util.*;

import net.rim.device.api.i18n.*;

import net.rim.blackberry.api.invoke.*;

import net.rim.blackberry.api.browser.*;

import com.rim.samples.docs.resource.*;

public class Restaurants extends UiApplication implements RestaurantResource {

private AutoTextEditField namefield;

private AutoTextEditField addressfield;

private EditField phonefield;

private EditField websitefield;

private EditField specialtyfield;

private static Vector _data;

private static PersistentObject store;

private static ResourceBundle _resources;

private MenuItem saveItem = new MenuItem(_resources.getString(MENUITEM_SAVE), 110, 10)

{

Retrieve the most recently

saved object.

>Invoke _data.lastElement().

public void run() {

synchronized(store) {

_data = (Vector)store.getContents();

if (!_data.isEmpty()) {

RestaurantInfo info = (RestaurantInfo)_data.lastElement();

namefield.setText(info.getElement(RestaurantInfo.NAME));

addressfield.setText(info.getElement(RestaurantInfo.ADDRESS));

phonefield.setText(info.getElement(RestaurantInfo.PHONE));

specialtyfield.setText(info.getElement(

RestaurantInfo.SPECIALTY));}

}

Task Steps

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