TextBoxMIDlet.java Source code

Introduction

Here is the source code for TextBoxMIDlet.java

Source

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
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 implements CommandListener {
    private static final int MAX_TEXT_SIZE = 64;
    protected TextBox textBox;
    protected Display display;
    private static final Command EXIT_COMMAND = new Command("Exit", Command.EXIT, 0);

    private static final Command OK_COMMAND = new Command("OK", Command.OK, 0);

    private static final Command CLEAR_COMMAND = new Command("Clear", Command.SCREEN, 1);

    private static final Command REVERSE_COMMAND = new Command("Reverse", Command.SCREEN, 1);

    protected void startApp() {
        String str = null;
        try {
            InputStream is = getClass().getResourceAsStream("resources/text.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";
        }
        textBox = new TextBox("TextBox Example", str, MAX_TEXT_SIZE, TextField.ANY);
        Ticker ticker = new Ticker("This is a ticker...");
        textBox.setTicker(ticker);
        textBox.addCommand(OK_COMMAND);
        textBox.addCommand(EXIT_COMMAND);
        textBox.addCommand(CLEAR_COMMAND);
        textBox.addCommand(REVERSE_COMMAND);
        textBox.setCommandListener(this);
        display = Display.getDisplay(this);
        display.setCurrent(textBox);
    }

    protected void pauseApp() {
    }

    protected void destroyApp(boolean unconditional) {
    }

    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());
            }
        }
    }
}