StringItem Alternative
/*-------------------------------------------------- * StringItemAlternative.java * * Example from the book: Core J2ME Technology * Copyright John W. Muchow http://www.CoreJ2ME.com * You may use/modify for any non-commercial purpose *-------------------------------------------------*/ import javax.microedition.midlet.*; import javax.microedition.lcdui.*; public class StringItemAlternative extends MIDlet implements CommandListener { private Display display; // Reference to Display object for this MIDlet private Form fmMain; // The main form private Command cmNext; // Next label and message private Command cmExit; // Command to exit the MIDlet private int msgIndex; // Index of our message text on form private static int count = 0; // How many times through our loop public StringItemAlternative() { display = Display.getDisplay(this); // Create commands cmNext = new Command("Next", Command.SCREEN, 1); cmExit = new Command("Exit", Command.EXIT, 1); // Create Form, add Command & message, listen for events fmMain = new Form("Preferences"); fmMain.addCommand(cmExit); fmMain.addCommand(cmNext); // Save the index location of this item msgIndex = fmMain.append("UserId: johnm"); fmMain.setCommandListener(this); } // Called by application manager to start the MIDlet. public void startApp() { display.setCurrent(fmMain); } public void pauseApp() { } public void destroyApp(boolean unconditional) { } public void commandAction(Command c, Displayable s) { if (c == cmNext) { if (count++ == 0) { //-------------------------------- // Option # 1 // First time through this method //-------------------------------- StringItem tmpItem = (StringItem) fmMain.get(msgIndex); System.out.println("tmpItem.getLabel(): " + tmpItem.getLabel()); System.out.println("tmpItem.getText(): " + tmpItem.getText()); tmpItem.setLabel("Account #: "); //inherited from Item class tmpItem.setText("731"); } else { //-------------------------------- // Option # 2 // Second time through this method //-------------------------------- fmMain.set(msgIndex, new StringItem("Password: ", "superPants")); // Remove the Update command fmMain.removeCommand(cmNext); } } else if (c == cmExit) { destroyApp(false); notifyDestroyed(); } } }
1. | StringItem Demo |