在黑莓标签 [英] Tabs in Blackberry
问题描述
我开发黑莓应用程序，我是新手，所以不知道如何执行。
I am developing application in BlackBerry and i am a newbie, so no idea how to implement.
在我的应用程序必须实现标签。为此，我使用pillButtonSet。在我的应用我有五个选项卡和每个标签都有复杂的视图。我想创建不同的标签不同的Java类。
In my application i have to implement tabs. For this i used pillButtonSet. In my application i have five tabs and each tab has complex view. I want to create different java class for different tabs.
如的Android，我们有 TabActivity ，我们选项卡之间轻松导航。直到现在我还没有设计对每个选项卡中的视图。我使用Google，但没有成功。
As in Android we have TabActivity and we easily navigate between tabs. Still i have not designed the view for each tabs. I am googling but no success.
我担心;我需要写完整的code在一个屏幕上？ ....如果不是我在哪里要创建标签和如何定位？
I am worried; do i need to write whole code on one screen? .... If not where do i have to create tabs and how to navigate?
推荐答案
在看看<一个href=\"http://supportforums.blackberry.com/t5/Java-Development/Create-tabbed-view-screens/ta-p/444969\"相对=nofollow>从RIM 这款黑莓的例子。这是一个有点老了，但如果你仍然有支持OS 5.0，这是一个很有用的技术（见答案的底部，如果你不支持OS 5.0）。
Take a look at this BlackBerry example from RIM. It's a bit old, but if you still have to support OS 5.0, it's a useful technique (see bottom of answer if you don't support OS 5.0).
这说明：
的基本方法是使用一组管理来控制的集
当已经选择了一个选项卡上的屏幕显示领域。标签
被实现为可聚焦LabelFields，具有FocusChangeListener
做经理开关时，焦点变化。字段和经理
初始化一次，并保持在内存中保留状态变化
标签之间。
The basic approach is to use a set of Managers to control the sets of Fields that appear on the Screen when a tab has been selected. Tabs are implemented as focusable LabelFields, with a FocusChangeListener doing the Manager switch when focus changes. Fields and Managers are initialized once and maintained in memory to retain state changes between tabs.
该页面有样品code下载，但以防止任何可能的环节腐，这里的样品中最重要的部分：
The page has sample code to download, but to protect against any possible link rot, here's the most important part of the sample:
package com.rim.samples.tabcontrol;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FocusChangeListener;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.BasicEditField;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
public class TabControl extends UiApplication {
public TabControl() {
TabControlScreen screen = new TabControlScreen();
pushScreen(screen);
}
/**
* @param args
*/
public static void main(String[] args) {
TabControl app = new TabControl();
app.enterEventDispatcher();
}
private class TabControlScreen extends MainScreen implements FocusChangeListener {
private LabelField tab1;
private LabelField tab2;
private LabelField tab3;
private LabelField spacer1;
private LabelField spacer2;
private VerticalFieldManager tabArea;
private LabelField tab1Heading;
private BasicEditField tab1Field1;
private BasicEditField tab1Field2;
private LabelField tab2Heading;
private BasicEditField tab2Field1;
private BasicEditField tab2Field2;
private LabelField tab3Heading;
private BasicEditField tab3Field1;
private BasicEditField tab3Field2;
private VerticalFieldManager tab1Manager;
private VerticalFieldManager tab2Manager;
private VerticalFieldManager tab3Manager;
public TabControlScreen() {
HorizontalFieldManager hManager = new HorizontalFieldManager();
tab1 = new LabelField("Page 1", LabelField.FOCUSABLE);
tab2 = new LabelField("Page 2", LabelField.FOCUSABLE);
tab3 = new LabelField("Page 3", LabelField.FOCUSABLE);
spacer1 = new LabelField(" | ", LabelField.NON_FOCUSABLE);
spacer2 = new LabelField(" | ", LabelField.NON_FOCUSABLE);
tab1.setFocusListener(this);
tab2.setFocusListener(this);
tab3.setFocusListener(this);
hManager.add(tab1);
hManager.add(spacer1);
hManager.add(tab2);
hManager.add(spacer2);
hManager.add(tab3);
add(hManager);
add(new SeparatorField());
tab1Manager = new VerticalFieldManager();
tab2Manager = new VerticalFieldManager();
tab3Manager = new VerticalFieldManager();
tabArea = displayTab1();
add(tabArea);
}
public void focusChanged(Field field, int eventType) {
if (tabArea != null) {
if (eventType == FOCUS_GAINED) {
if (field == tab1) {
System.out.println("Switch to Tab 1");
delete(tabArea);
tabArea = displayTab1();
add(tabArea);
} else if (field == tab2) {
System.out.println("Switch to Tab 2");
System.out.println("Switch to Tab 1");
delete(tabArea);
tabArea = displayTab2();
add(tabArea);
} else if (field == tab3) {
System.out.println("Switch to Tab 3");
System.out.println("Switch to Tab 1");
delete(tabArea);
tabArea = displayTab3();
add(tabArea);
}
}
}
}
public VerticalFieldManager displayTab1() {
if (tab1Heading == null) {
tab1Heading = new LabelField("Registration");
tab1Manager.add(tab1Heading);
}
if (tab1Field1 == null) {
tab1Field1 = new BasicEditField("Username: ", "");
tab1Manager.add(tab1Field1);
}
if (tab1Field2 == null) {
tab1Field2 = new BasicEditField("Password: ", "");
tab1Manager.add(tab1Field2);
}
return tab1Manager;
}
public VerticalFieldManager displayTab2() {
if (tab2Heading == null) {
tab2Heading = new LabelField("Password Recovery");
tab2Manager.add(tab2Heading);
}
if (tab2Field1 == null) {
tab2Field1 = new BasicEditField("Security Question: ", "Mother's Maiden Name?");
tab2Manager.add(tab2Field1);
}
if (tab2Field2 == null) {
tab2Field2 = new BasicEditField("Password: ", "");
tab2Manager.add(tab2Field2);
}
return tab2Manager;
}
public VerticalFieldManager displayTab3() {
if (tab3Heading == null) {
tab3Heading = new LabelField("Interests");
tab3Manager.add(tab3Heading);
}
if (tab3Field1 == null) {
tab3Field1 = new BasicEditField("Hobbies: ", "");
tab3Manager.add(tab3Field1);
}
if (tab3Field2 == null) {
tab3Field2 = new BasicEditField("Memberships: ", "");
tab3Manager.add(tab3Field2);
}
return tab3Manager;
}
}
}
您说：
我要为不同的分页创建不同的Java类。
I want to create different java class for different tabs.
在您的code，您可以编辑命名方法 displayTab1（）， displayTab2（），等返回不同的类为每个标签。下面的例子正好，每个班将延长的 VerticalFieldManager 类。不过，如果你期望的实现不能很好地设置了 VerticalFieldManager ，你当然可以改变这些方法的返回值仅仅是管理基类来代替。
In your code, you can edit the methods named displayTab1(), displayTab2(), etc. to return a different class for each tab. Following the example exactly, each class would extend the VerticalFieldManager class. However, if your desired implementation isn't well setup for a VerticalFieldManager, you could certainly change the return value of those methods to just be the Manager base class, instead.
请记住，如果你做的修改 tabArea 成员变量：
Just remember to change the tabArea member variable if you do that:
private Manager tabArea;
注意：如果您只需要支持OS 6.0及以上版本，你也可以看看<一个href=\"http://www.blackberry.com/developers/docs/7.1.0api/net/rim/device/api/ui/component/pane/HorizontalTabController.html\"相对=nofollow>这个新的API
Note: if you only have to support OS 6.0 and above, you can also look into this newer API
这篇关于在黑莓标签的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
