/**
* MIDletDemo.java
*
* Copyright � 1998-2011 Research In Motion Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Note: For the sake of simplicity, this sample application may not leverage
* resource bundles and resource strings. However, it is STRONGLY recommended
* that application developers make use of the localization features available
* within the BlackBerry development platform to ensure a seamless application
* experience across a variety of languages and geographies. For more information
* on localizing your application, please refer to the BlackBerry Java Development
* Environment Development Guide associated with this release.
*/
package com.rim.samples.device.midletdemo;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
/**
* An Example MIDlet. The MIDlet demonstrates how to use Commands and
* CommandListeners to affect the program flow. The application must extend the
* MIDlet class to allow the application management software to control the
* MIDlet.
*/
public class MIDletDemo extends MIDlet implements CommandListener {
private final Alert _alert;
private final int _time;
private final Form _form;
private final Display _display;
private UpdateThread _updateThread;
private final Command _exit;
/**
* The thread that updates the explosion dialog box.
*/
private class UpdateThread extends Thread {
private boolean _disarmed;
/**
* Updates the explosion dialog box.
*
* @see java.lang.Runnable#run
*/
public void run() {
// Keep counting down until the timer reaches 0 or the
// device has been disarmed
_disarmed = false;
int timer = _time;
while (timer > 0 && !_disarmed) {
try {
_alert.setString(Integer.toString(timer));
// Update every second
synchronized (this) {
this.wait(1000);
}
System.out.println("timeout in:" + timer);
} catch (final InterruptedException e) {
final Alert thrownException =
new Alert("UpdateThread#wait() threw exception:", e
.toString(), null, AlertType.ERROR);
_display.setCurrent(thrownException, _form);
}
timer--;
}
if (!_disarmed) {
_alert.setString("BOOM");
}
}
/**
* Disarms the device and stops the countdown.
*/
void disarm() {
_disarmed = true;
}
}
/**
* Thread that pops up the program's main dialog box.
*/
private class GoCommand extends Command implements Runnable {
/**
* Constructs the command to pop up the main dialog box.
*
* @param label
* The label of the command
* @param type
* The type of the command
* @param priority
* The priority of the command
*/
private GoCommand(final String label, final int type, final int priority) {
super(label, type, priority);
}
/**
* @see java.lang.Runnable#run()
*/
public void run() {
_alert.setString(Integer.toString(_time));
_alert.setTimeout(_time * 1000 + 5000);
_updateThread = new UpdateThread();
_updateThread.start();
_display.setCurrent(_alert, _form);
}
}
/**
* <p>
* The default constructor. Creates a simple screen and a command with an
* alert dialog box which pops up when the command is selected.
*/
public MIDletDemo() {
_alert =
new Alert(
"The Thermonuclear Device has been activated!\nTo disarm the device, dismiss this Alert.\nDevice will detonate in:");
_alert.setCommandListener(this);
_time = 10;
// Create a simple screen.
_form = new Form("Thermo-Nuclear Event");
_form.append("Choose 'Go' from the menu.");
_display = Display.getDisplay(this);
// Add our command.
_form.addCommand(new GoCommand("Go", Command.SCREEN, 1));
// Create and add exit command.
_exit = new Command("Close", Command.EXIT, 1);
_form.addCommand(_exit);
_form.setCommandListener(this);
_display.setCurrent(_form);
}
/**
* @see javax.microedition.lcdui.CommandListener#commandAction(Command,
* Displayable)
*/
public void commandAction(final Command c, final Displayable s) {
if (c instanceof Runnable) {
((Runnable) c).run();
}
if (c == Alert.DISMISS_COMMAND) {
_updateThread.disarm();
}
if (c == _exit) {
notifyDestroyed();
}
}
/**
* <p>
* Signals the MIDlet that it has entered the Active state.
*
* @see javax.microedition.midlet.MIDlet#startApp()
*/
public void startApp() {
// Not implemented.
}
/**
* <p>
* Signals the MIDlet to stop and enter the Pause state.
*
* @see javax.microedition.midlet.MIDlet#pauseApp()
*/
public void pauseApp() {
// Not implemented.
}
/**
* <p>
* Signals the MIDlet to terminate and enter the Destroyed state.
*
* @param unconditional
* When set to true, the MIDlet must cleanup and release all
* resources. Otherwise, the MIDlet may throw a
* MIDletStateChangeException to indicate it does not want to be
* destroyed at this time.
* @see javax.microedition.midlet.MIDlet#destroyApp(boolean)
*/
public void destroyApp(final boolean unconditional) {
// Not implemented.
}
}