Java/J2ME/TextBox TextField
Содержание
GUI Test in MIDlet
/*
Learning Wireless Java
Help for New J2ME Developers
By Qusay Mahmoud
ISBN: 0-596-00243-2
*/
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class GuiTests extends MIDlet implements CommandListener {
// display manager
Display display = null;
// a menu with items
List menu = null; // main menu
// list of choices
List choose = null;
// textbox
TextBox input = null;
// ticker
Ticker ticker = new Ticker("Test GUI Components");
// alerts
final Alert soundAlert = new Alert("sound Alert");
// date
DateField date = new DateField("Today"s date: ", DateField.DATE);
// form
Form form = new Form("Form for Stuff");
// gauge
Gauge gauge = new Gauge("Progress Bar", false, 20, 9);
// text field
TextField textfield = new TextField("TextField Label", "abc", 50, 0);
// command
static final Command backCommand = new Command("Back", Command.BACK, 0);
static final Command mainMenuCommand = new Command("Main", Command.SCREEN, 1);
static final Command exitCommand = new Command("Exit", Command.STOP, 2);
String currentMenu = null;
// constructor.
public GuiTests() {
}
/**
* Start the MIDlet by creating a list of items and associating the
* exit command with it.
*/
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
// open a db stock file
menu = new List("Test Components", Choice.IMPLICIT);
menu.append("Test TextBox", null);
menu.append("Test List", null);
menu.append("Test Alert", null);
menu.append("Test Date", null);
menu.append("Test Form", null);
menu.addCommand(exitCommand);
menu.setCommandListener(this);
menu.setTicker(ticker);
mainMenu();
}
public void pauseApp() {
display = null;
choose = null;
menu = null;
ticker = null;
form = null;
input = null;
gauge = null;
textfield = null;
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
// main menu
void mainMenu() {
display.setCurrent(menu);
currentMenu = "Main";
}
/**
* Test the TextBox component.
*/
public void testTextBox() {
input = new TextBox("Enter Some Text:", "", 10, TextField.ANY);
input.setTicker(new Ticker("Testing TextBox"));
input.addCommand(backCommand);
input.setCommandListener(this);
input.setString("");
display.setCurrent(input);
currentMenu = "input";
}
/**
* Test the List component.
*/
public void testList() {
choose = new List("Choose Items", Choice.MULTIPLE);
choose.setTicker(new Ticker("Testing List"));
choose.addCommand(backCommand);
choose.setCommandListener(this);
choose.append("Item 1", null);
choose.append("Item 2", null);
choose.append("Item 3", null);
display.setCurrent(choose);
currentMenu = "list";
}
/**
* Test the Alert component.
*/
public void testAlert() {
soundAlert.setType(AlertType.ERROR);
//soundAlert.setTimeout(20);
soundAlert.setString("** ERROR **");
display.setCurrent(soundAlert);
}
/**
* Test the DateField component.
*/
public void testDate() {
java.util.Date now = new java.util.Date();
date.setDate(now);
Form f = new Form("Today"s date");
f.append(date);
f.addCommand(backCommand);
f.setCommandListener(this);
display.setCurrent(f);
currentMenu = "date";
}
/**
* Test the Form component.
*/
public void testForm() {
form.append(gauge);
form.append(textfield);
form.addCommand(backCommand);
form.setCommandListener(this);
display.setCurrent(form);
currentMenu = "form";
}
/**
* Handle events.
*/
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Exit")) {
destroyApp(true);
} else if (label.equals("Back")) {
if(currentMenu.equals("list") || currentMenu.equals("input") ||
currentMenu.equals("date") || currentMenu.equals("form")) {
// go back to menu
mainMenu();
}
} else {
List down = (List)display.getCurrent();
switch(down.getSelectedIndex()) {
case 0: testTextBox();break;
case 1: testList();break;
case 2: testAlert();break;
case 3: testDate();break;
case 4: testForm();break;
}
}
}
}
Hello TextBox MIDlet
/*
*
* Copyright (c) 2000 Sun Microsystems, Inc. All Rights Reserved.
*
* Author: Srikanth Raju
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/**
* An example MIDlet with simple "Hello" text in a TextBox
* Refer to the startApp, pauseApp, and destroyApp
* methods so see how each handles the requested transition.
*/
public class HelloTextBoxMIDlet extends MIDlet
{
private Display display; // The display for this MIDlet
public HelloTextBoxMIDlet() {
display = Display.getDisplay(this);
}
/**
* Start up the Hello MIDlet by creating the TextBox
*/
public void startApp() {
TextBox t = new TextBox("Hello UCSC", "Hello Saturday!", 256, 0);
display.setCurrent(t);
}
/**
* Pause is a no-op since there are no background activities or
* record stores that need to be closed.
*/
public void pauseApp() {
}
/**
* Destroy must cleanup everything not handled by the garbage collector.
* In this case there is nothing to cleanup.
*/
public void destroyApp(boolean unconditional) {
}
}
Hide Text
//jad file (please verify the jar size)
/*
MIDlet-Name: HideText
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: HideText.jar
MIDlet-1: HideText, , HideText
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100
*/
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class HideText extends MIDlet implements CommandListener {
private Display display;
private Form form = new Form("Enter Password");
private Command submit = new Command("Submit", Command.SCREEN, 1);
private Command exit = new Command("Exit", Command.EXIT, 1);
private TextField textfield = new TextField("Password:", "", 30, TextField.ANY
| TextField.PASSWORD);
public HideText() {
display = Display.getDisplay(this);
form.addCommand(exit);
form.addCommand(submit);
form.append(textfield);
form.setCommandListener(this);
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command command, Displayable displayable) {
if (command == submit) {
textfield.setConstraints(TextField.ANY);
textfield.setString("Thank you.");
form.removeCommand(submit);
} else if (command == exit) {
destroyApp(false);
notifyDestroyed();
}
}
}
Login Midlet
/*
Learning Wireless Java
Help for New J2ME Developers
By Qusay Mahmoud
ISBN: 0-596-00243-2
*/
import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.*;
public class LoginMidlet extends MIDlet implements CommandListener {
private Display display;
private TextField userName;
private TextField password;
private Form form;
private Command cancel;
private Command login;
public LoginMidlet() {
userName = new TextField("LoginID:", "", 10, TextField.ANY);
password = new TextField("Password:", "", 10, TextField.PASSWORD);
form = new Form("Sign in");
cancel = new Command("Cancel", Command.CANCEL, 2);
login = new Command("Login", Command.OK, 2);
}
public void startApp() {
display = Display.getDisplay(this);
form.append(userName);
form.append(password);
form.addCommand(cancel);
form.addCommand(login);
form.setCommandListener(this);
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
public void validateUser(String name, String password) {
if (name.equals("qm") && password.equals("j2")) {
menu();
} else {
tryAgain();
}
}
public void menu() {
List services = new List("Choose one", Choice.EXCLUSIVE);
services.append("Check Mail", null);
services.append("Compose", null);
services.append("Addresses", null);
services.append("Options", null);
services.append("Sign Out", null);
display.setCurrent(services);
}
public void tryAgain() {
Alert error = new Alert("Login Incorrect", "Please try again", null, AlertType.ERROR);
error.setTimeout(Alert.FOREVER);
userName.setString("");
password.setString("");
display.setCurrent(error, form);
}
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if(label.equals("Cancel")) {
destroyApp(true);
} else if(label.equals("Login")) {
validateUser(userName.getString(), password.getString());
}
}
}
Phone Book
/*
* PhoneBook.java
* Copyright (c) 2000 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*/
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
/**
*/
public class PhoneBook extends MIDlet implements CommandListener {
private Command exitCommand; // The exit command
private Command nextCommand;
private Command newCommand;
private TextBox t1;
private TextBox t;
private Display display; // The display for this MIDlet
private String _name;
private String _number;
public PhoneBook() {
display = Display.getDisplay(this);
nextCommand = new Command("Next", Command.SCREEN, 2);
exitCommand = new Command("Exit", Command.SCREEN, 2);
newCommand = new Command("NewNumber", Command.SCREEN, 2);
}
public void startApp() {
t = new TextBox("Name", "", 256, TextField.ANY);
t.addCommand(nextCommand);
t.setCommandListener(this);
t1 = new TextBox("Number", "", 256, TextField.PHONENUMBER);
t1.addCommand(newCommand);
t1.addCommand(exitCommand);
t1.setCommandListener(this);
display.setCurrent(t);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command c, Displayable s) {
if (c == exitCommand) {
_name = t.getString();
_number = t1.getString();
System.out.println("Name = " + t.getString() + ", Number = "
+ t1.getString());
destroyApp(false);
notifyDestroyed();
}
if (c == nextCommand) {
t1.setString(" ");
display.setCurrent(t1);
}
if (c == newCommand) {
display.setCurrent(t);
_name = t.getString();
_number = t1.getString();
System.out.println("Name = " + t.getString() + ", Number = "
+ t1.getString());
t.setString(" ");
}
}
}
Simple ClipBoard
/*--------------------------------------------------
* SimpleClipBoard.java
*
* Example from the book: Core J2ME Technology
* Copyright John W. Muchow http://www.CoreJ2ME.ru
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class SimpleClipBoard extends MIDlet implements CommandListener
{
private Display display; // Reference to Display object
private TextBox tbClip; // Main textbox
private Command cmExit; // Command to exit
private Command cmStartMark; // Command to start marking a block
private Command cmCopy; // Command to copy to clipboard
private Command cmPaste; // Command to paste into textbox
private int beginOffset = 0; // The start index of copy
private char[] clipBoard = null; // The clipboard
private int clipBoardChars = 0; // Number of chars in clipboard
public SimpleClipBoard()
{
display = Display.getDisplay(this);
// Create the Commands. Notice the priorities assigned
cmExit = new Command("Exit", Command.EXIT, 1);
cmStartMark = new Command("Mark", Command.SCREEN, 2);
cmCopy = new Command("Copy", Command.SCREEN, 3);
cmPaste = new Command("Paste", Command.SCREEN, 4);
tbClip = new TextBox("Clip Board", "Tee to grn", 15, TextField.ANY);
tbClip.addCommand(cmExit);
tbClip.addCommand(cmStartMark);
tbClip.addCommand(cmCopy);
tbClip.addCommand(cmPaste);
tbClip.setCommandListener(this);
// Allocate a clipboard big enough to hold the entire textbox
clipBoard = new char[tbClip.getMaxSize()];
}
public void startApp()
{
display.setCurrent(tbClip);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command c, Displayable s)
{
if (c == cmStartMark)
{
beginOffset = tbClip.getCaretPosition();
}
else if (c == cmCopy && (tbClip.getCaretPosition() > beginOffset))
{
// Allocate an array to hold the current textbox contents
char[] chr = new char[tbClip.size()];
// Get the current textbox contents
tbClip.getChars(chr);
// The count of characters in the clipboard
clipBoardChars = tbClip.getCaretPosition() - beginOffset;
// Copy the text into the clipboard
// arraycopy(source, sourceindex, dest, destindex, count)
System.arraycopy(chr, beginOffset, clipBoard, 0, clipBoardChars);
}
else if (c == cmPaste)
{
// Make sure the paste will not overrun the textbox length.
if ((tbClip.size() + clipBoardChars) <= tbClip.getMaxSize())
tbClip.insert(clipBoard, 0, clipBoardChars, tbClip.getCaretPosition());
}
else if (c == cmExit)
{
destroyApp(false);
notifyDestroyed();
}
}
}
TextBox Capture
/*
J2ME: The Complete Reference
James Keogh
Publisher: McGraw-Hill
ISBN 0072227109
*/
//jad file (please verify the jar size)
/*
MIDlet-Name: TextBoxCapture
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: TextBoxCapture.jar
MIDlet-1: TextBoxCapture, , TextBoxCapture
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100
*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class TextBoxCapture extends MIDlet implements CommandListener
{
private Display display;
private TextBox textbox;
private Command submit;
private Command exit;
public TextBoxCapture()
{
display = Display.getDisplay(this);
submit = new Command("Submit", Command.SCREEN, 1);
exit = new Command("Exit", Command.EXIT, 1);
textbox = new TextBox("First Name:", "", 30, TextField.ANY);
textbox.addCommand(exit);
textbox.addCommand(submit);
textbox.setCommandListener(this);
}
public void startApp()
{
display.setCurrent(textbox);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command command, Displayable displayable)
{
if (command == submit)
{
textbox.setString("Hello, " + textbox.getString());
textbox.removeCommand(submit);
}
else if (command == exit)
{
destroyApp(false);
notifyDestroyed();
}
}
}
TextBox MIDlet
/*
J2ME in a Nutshell
By Kim Topley
ISBN: 0-596-00253-X
*/
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
public class TextBoxMIDlet extends MIDlet {
// Maximum size of the text in the TextBox
private static final int MAX_TEXT_SIZE = 64;
// The TextBox
protected TextBox textBox;
// The MIDlet"s Display object
protected Display display;
// Flag indicating first call of startApp
protected boolean started;
protected void startApp() {
if (!started) {
// First time through - initialize
// Get the text to be displayed
String str = null;
try {
InputStream is = getClass().getResourceAsStream("test.txt");
InputStreamReader r = new InputStreamReader(is);
char[] buffer = new char[32];
StringBuffer sb = new StringBuffer();
int count;
while ((count = r.read(buffer, 0, buffer.length)) > -1) {
sb.append(buffer, 0, count);
}
str = sb.toString();
} catch (IOException ex) {
str = "Failed to load text";
}
// Create the TextBox
textBox = new TextBox("TextBox Example", str,
MAX_TEXT_SIZE, TextField.ANY);
// Create a ticker and install it
Ticker ticker = new Ticker("This is a ticker...");
textBox.setTicker(ticker);
// Install the TextBox as the current screen
display = Display.getDisplay(this);
display.setCurrent(textBox);
started = true;
}
}
protected void pauseApp() {
}
protected void destroyApp(boolean unconditional) {
}
}
TextBox MIDlet 2
/*
J2ME in a Nutshell
By Kim Topley
ISBN: 0-596-00253-X
*/
import java.io.*;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class TextBox2MIDlet extends TextBoxMIDlet implements CommandListener {
// Exit command
private static final Command EXIT_COMMAND =
new Command("Exit", Command.EXIT, 0);
// OK command
private static final Command OK_COMMAND =
new Command("OK", Command.OK, 0);
// Clear text box content
private static final Command CLEAR_COMMAND =
new Command("Clear", Command.SCREEN, 1);
// Reverse the content of the text box
private static final Command REVERSE_COMMAND =
new Command("Reverse", Command.SCREEN, 1);
protected void startApp() {
boolean firstTime = !started;
super.startApp();
// If this is the first execution
// of startApp, install commands
if (firstTime) {
textBox.addCommand(OK_COMMAND);
textBox.addCommand(EXIT_COMMAND);
textBox.addCommand(CLEAR_COMMAND);
textBox.addCommand(REVERSE_COMMAND);
textBox.setCommandListener(this);
}
}
// Command implementations.
public void commandAction(Command c, Displayable d) {
if (c == EXIT_COMMAND) {
destroyApp(true);
notifyDestroyed();
} else if (c == OK_COMMAND) {
System.out.println("OK pressed");
} else if (c == CLEAR_COMMAND) {
textBox.setString(null);
} else if (c == REVERSE_COMMAND) {
String str = textBox.getString();
if (str != null) {
StringBuffer sb = new StringBuffer(str);
textBox.setString(sb.reverse().toString());
}
}
}
}
class TextBoxMIDlet extends MIDlet {
// Maximum size of the text in the TextBox
private static final int MAX_TEXT_SIZE = 64;
// The TextBox
protected TextBox textBox;
// The MIDlet"s Display object
protected Display display;
// Flag indicating first call of startApp
protected boolean started;
protected void startApp() {
if (!started) {
// First time through - initialize
// Get the text to be displayed
String str = null;
try {
InputStream is = getClass().getResourceAsStream("test.txt");
InputStreamReader r = new InputStreamReader(is);
char[] buffer = new char[32];
StringBuffer sb = new StringBuffer();
int count;
while ((count = r.read(buffer, 0, buffer.length)) > -1) {
sb.append(buffer, 0, count);
}
str = sb.toString();
} catch (IOException ex) {
str = "Failed to load text";
}
// Create the TextBox
textBox = new TextBox("TextBox Example", str,
MAX_TEXT_SIZE, TextField.ANY);
// Create a ticker and install it
Ticker ticker = new Ticker("This is a ticker...");
textBox.setTicker(ticker);
// Install the TextBox as the current screen
display = Display.getDisplay(this);
display.setCurrent(textBox);
started = true;
}
}
protected void pauseApp() {
}
protected void destroyApp(boolean unconditional) {
}
}
/*--------------------------------------------------
* SharedClipBoard.java
*
* A List component that can show one of two
* textboxes. Each textbox shares a common clipboard
*
* Example from the book: Core J2ME Technology
* Copyright John W. Muchow http://www.CoreJ2ME.ru
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class SharedClipBoard extends MIDlet implements CommandListener
{
private Display display; // Reference to Display object
private List lsMain; // Main list
private TextBoxCB tbClip1; // Textbox with clipboard
private TextBoxCB tbClip2; // Textbox with clipboard
private Command cmExit; // Command to exit
public SharedClipBoard()
{
display = Display.getDisplay(this);
// Create list
lsMain = new List("ClipBoard Testing", List.IMPLICIT);
lsMain.append("TextBox1", null);
lsMain.append("TextBox2", null);
// Create the exit command, add to list
cmExit = new Command("Exit", Command.EXIT, 1);
lsMain.addCommand(cmExit);
lsMain.setCommandListener(this);
// Allocate textboxes
tbClip1 = new TextBoxCB("TextBox1", "Email Address: john@corej2me.ru", 50, TextField.ANY, this);
tbClip2 = new TextBoxCB("TextBox2", "Web Address: www.", 50, TextField.ANY, this);
}
public void startApp()
{
showList();
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void showList()
{
// Display the list component
display.setCurrent(lsMain);
}
public void commandAction(Command c, Displayable s)
{
// If an implicit list generated the event
if (c == List.SELECT_COMMAND)
{
switch (lsMain.getSelectedIndex())
{
case 0:
// Display textbox 1
display.setCurrent(tbClip1);
break;
case 1:
// Display textbox 2
display.setCurrent(tbClip2);
break;
}
}
else if (c == cmExit)
{
destroyApp(false);
notifyDestroyed();
}
}
}
/*--------------------------------------------------
* TextBoxCB.java
*
* A textbox that includes a clipboard. This class
* encapsulates all the commands necessary to show
* a menu for mark, copy, cut and paste.
*
* Example from the book: Core J2ME Technology
* Copyright John W. Muchow http://www.CoreJ2ME.ru
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
class TextBoxCB extends TextBox implements CommandListener
{
private ClipBoard clipboard; // The clipboard class
private Command cmBack; // Command to go back
private Command cmStartMark; // Command to start marking a block
private Command cmCopy; // Command to copy to clipboard
private Command cmCut; // Command to cut to clipboard
private Command cmPaste; // Command to paste into textbox
private SharedClipBoard midlet; // The midlet
public TextBoxCB(String title, String text, int maxSize, int constraints,
SharedClipBoard midlet)
{
// Call the TextBox constructor
super(title, text, maxSize, constraints);
// Save reference to MIDlet so we can access its methods
this.midlet = midlet;
// Create the Commands. Notice the priorities assigned
cmBack = new Command("Back", Command.BACK, 1);
cmStartMark = new Command("Mark", Command.SCREEN, 2);
cmCopy = new Command("Copy", Command.SCREEN, 3);
cmCut = new Command("Cut", Command.SCREEN, 4);
cmPaste = new Command("Paste", Command.SCREEN, 5);
this.addCommand(cmBack);
this.addCommand(cmStartMark);
this.addCommand(cmCopy);
this.addCommand(cmCut);
this.addCommand(cmPaste);
this.setCommandListener(this);
// Create a clipboard
clipboard = new ClipBoard(this);
}
public void commandAction(Command c, Displayable s)
{
if (c == cmStartMark)
{
// Start to mark a block of text
clipboard.startMark();
}
else if (c == cmCopy)
{
// Copy text to clipboard
clipboard.copy();
}
else if (c == cmCut)
{
// Cut text to clipboard
clipboard.cut();
}
else if (c == cmPaste)
{
// Paste from clipboard to textbox
clipboard.paste();
}
else if (c == cmBack)
{
// Return to the list component
midlet.showList();
}
}
}
/*--------------------------------------------------
* ClipBoard.java
*
* Core clipboard code - mark, copy, cut and paste
*
* Example from the book: Core J2ME Technology
* Copyright John W. Muchow http://www.CoreJ2ME.ru
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/
class ClipBoard
{
//--------------------------------------------------
// Allocate clipboard. Note, both clipboard & count
// of characters are shared across all instances
//--------------------------------------------------
private static char[] _clipBoard = new char[1000];
private static int _clipBoardCount = 0;
private int beginOffset = 0; // The start index of copy
private TextBox tb = null; // textbox for this instance
/*--------------------------------------------------
* Hold reference to textbox that created clipboard
*-------------------------------------------------*/
public ClipBoard(TextBox textbox)
{
tb = textbox;
}
/*--------------------------------------------------
* Set starting point of copy
*-------------------------------------------------*/
public void startMark()
{
beginOffset = tb.getCaretPosition();
}
/*--------------------------------------------------
* Copy text into the clipboard
*-------------------------------------------------*/
public void copy()
{
copy2clipboard();
}
/*--------------------------------------------------
* Copy text into the clipboard. If successful copy,
* delete text from the textbox.
*-------------------------------------------------*/
public void cut()
{
if (copy2clipboard())
tb.delete(beginOffset, tb.getCaretPosition() - beginOffset);
}
/*--------------------------------------------------
* Do the actual copy into the clipboard
*-------------------------------------------------*/
private boolean copy2clipboard()
{
// Can only mark (copy/cut) going forward
if (tb.getCaretPosition() > beginOffset)
{
// Allocate an array to hold the current textbox contents
char[] chr = new char[tb.size()];
// Get the current textbox contents
tb.getChars(chr);
// The count of characters in the clipboard
_clipBoardCount = tb.getCaretPosition() - beginOffset;
// Copy the text into the clipboard
// arraycopy(source, sourceindex, dest, destindex, count)
System.arraycopy(chr, beginOffset, _clipBoard, 0, _clipBoardCount);
return true;
}
else
return false;
}
/*--------------------------------------------------
* Paste text from clipboard into the textbox
*-------------------------------------------------*/
public void paste()
{
// Make sure the paste will not overrun the textbox length
if ((tb.size() + _clipBoardCount) <= tb.getMaxSize())
tb.insert(_clipBoard, 0, _clipBoardCount, tb.getCaretPosition());
}
}
TextField Capture
//jad file (please verify the jar size)
/*
MIDlet-Name: TextFieldCapture
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: TextFieldCapture.jar
MIDlet-1: TextFieldCapture, , TextFieldCapture
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100
*/
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class TextFieldCapture extends MIDlet implements CommandListener {
private Display display;
private Form form = new Form("Sign In Please");
private Command submit = new Command("Submit", Command.SCREEN, 1);
private Command exit = new Command("Exit", Command.EXIT, 1);
private TextField textfield = new TextField("First Name:", "", 30, TextField.ANY);
public TextFieldCapture() {
display = Display.getDisplay(this);
form.addCommand(exit);
form.addCommand(submit);
form.append(textfield);
form.setCommandListener(this);
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command command, Displayable displayable) {
if (command == submit) {
textfield.setString("Hello, " + textfield.getString());
form.removeCommand(submit);
} else if (command == exit) {
destroyApp(false);
notifyDestroyed();
}
}
}
