javaMe Tab
首先,先来说说“分页”,Win32控件中,有种控件叫做Tab,这个功能是把一个窗体分层,同时可以容纳更多控件(注:这里的分页并不是B/S的网络数据库中的分页)。
在J2ME中实现Tab,可谓是件好事,包含Tab控件的Class可以作为主类,从而根据需求关联更多的应用。然后,使用Tab效果最好的是触摸屏手机...........
LWUIT里的Text控件,跟原来的Text控件差不多,很多人都疑惑:Text控件输入汉字时,到底是用高级的输入框,还是在当前界面输入........答案是调用高级输入框!
OK,废话少说,直接来代码,这里的代码也是修改自Sample例子:
1. /*
2. * Copyright ?2008 Sun Microsystems, Inc. All rights reserved.
3. * Use is subject to license terms.
4. *
5. */
6. package com.sun.lwuit.uidemo;
7.
8. import com.sun.lwuit.Button;
9. import com.sun.lwuit.ButtonGroup;
10. import com.sun.lwuit.Command;
11. import com.sun.lwuit.Container;
12. import com.sun.lwuit.Dialog;
13. import com.sun.lwuit.Form;
14. import com.sun.lwuit.Label;
15. import com.sun.lwuit.RadioButton;
16. import com.sun.lwuit.TabbedPane;
17. import com.sun.lwuit.TextArea;
18. import com.sun.lwuit.TextField;
19. import com.sun.lwuit.events.ActionEvent;
20. import com.sun.lwuit.events.ActionListener;
21. import com.sun.lwuit.layouts.BorderLayout;
22. import com.sun.lwuit.layouts.BoxLayout;
23.
24. /**
25. * 本例演示如何使用Tabbed、Text控件
26. */
27. public class TabbedPaneDemo implements ActionListener {
28. public Form form = new Form("TabbedPaneDemo");
29. private Command backCommand = new Command("Back", 1);
30. final TextArea title ;
31. final TextArea body;
32. TabbedPane tp = null;
33.
34. TabbedPaneDemo() {
35. form.setLayout(new BorderLayout());
36. form.setScrollable(false);
37. form.addCommand(backCommand);
38. form.setCommandListener(this);
39. tp = new TabbedPane();
40.
41. //addTab可以为页面添加控件,也可以是Container(相当于容器的控件)
42. tp.addTab("Tab 1", new Label("Welcome to TabbedPane demo!"));
43.
44. //---------------------第二页的内容------------------------------------
45. //Container就是一个控件,只不过相当于容器,建议每页有自己的事件处理
46. Container radioButtonsPanel = new Container(new BoxLayout(BoxLayout.Y_AXIS));
47.
48. RadioButton topRB = new RadioButton("Top");
49. RadioButton LeftRB = new RadioButton("Left");
50. RadioButton BottomRB = new RadioButton("Bottom");
51. RadioButton RightRB = new RadioButton("Right");
52.
53. RadioListener rbListener = new RadioListener();//自定义接收事件的类
54. topRB.addActionListener(rbListener);
55. LeftRB.addActionListener(rbListener);
56. BottomRB.addActionListener(rbListener);
57. RightRB.addActionListener(rbListener);
58.
59. ButtonGroup group1 = new ButtonGroup();
60. group1.add(topRB);
61. group1.add(LeftRB);
62. group1.add(BottomRB);
63. group1.add(RightRB);
64.
65. radioButtonsPanel.addComponent(new Label("Please choose a tab placement direction:"));
66. radioButtonsPanel.addComponent(topRB);
67. radioButtonsPanel.addComponent(LeftRB);
68. radioButtonsPanel.addComponent(BottomRB);
69. radioButtonsPanel.addComponent(RightRB);
70.
71. tp.addTab("Tab 2", radioButtonsPanel);
72.
73. //----------------------第三页的内容----------------------------------
74. //Container就是一个控件,只不过相当于容器,建议每页有自己的事件处理
75. Container TextPanel = new Container(new BoxLayout(BoxLayout.Y_AXIS));
76. ButtonListener txtListener = new ButtonListener();//按钮事件处理
77.
78. title = new TextField("Title");
79. title.getStyle().setBgTransparency(100);
80.
81. body = new TextArea("This is the body of the alert....", 3, 20);
82. body.getStyle().setBgTransparency(100);
83.
84. final Button ShowMessage =new Button("ok");
85. ShowMessage.getStyle().setBgTransparency(100);
86. ShowMessage.addActionListener(txtListener);
87.
88. TextPanel.addComponent(title);
89. TextPanel.addComponent(body);
90. TextPanel.addComponent(ShowMessage);
91.
92.
93. tp.addTab("Tab 3", TextPanel);
94.
95. form.addComponent("Center", tp);
96. }
97.
98. /** 监听 radio buttons事件 */
99. class RadioListener implements ActionListener {
100. public void actionPerformed(ActionEvent e) {
101. String title = ((RadioButton) e.getSource()).getText();
102. Dialog.show("TabbedPaneDemo", title, "OK", null);
103. }
104. }
105.
106. /** 监听 buttons事件 */
107. class ButtonListener implements ActionListener {
108. public void actionPerformed(ActionEvent e) {
109. Dialog.show(title.getText(), body.getText(), "OK", null);
110. }
111. }
112.
113. /** 监听command事件 */
114. public void actionPerformed(ActionEvent arg0) {
115. UIDemoMIDlet.backToMainMenu();
116. }
117. }
118.
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