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Displaying an Alert on mobile screen |
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An alert shows data to the user and waits for a period of time before
going to the next screen. It can contain text and image.
The use of Alert is to inform about errors and other exceptional conditions.
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class alertMidlet extends MIDlet implements CommandListener
{
private Command exitCommand;
private Command alertCommand;
private Display display;
private TextBox tb;
public alertMidlet()
{
exitCommand = new Command("Exit", Command.EXIT, 1);
alertCommand = new Command("Alert", Command.SCREEN, 1);
tb = new TextBox("Alert MIDLET", "Main Screen", 25, 0);
}
protected void startApp()
{
tb.addCommand(exitCommand);
tb.addCommand(alertCommand);
tb.setCommandListener(this);
display = Display.getDisplay(this);
display.setCurrent(tb);
}
protected void pauseApp() {}
protected void destroyApp(boolean bool) {}
public void commandAction(Command cmd, Displayable disp)
{
if (cmd == exitCommand) {
destroyApp(false);
notifyDestroyed();
}
else if (cmd == alertCommand)
{
Alert at = new Alert("Alert", "Alert Screen",
null, AlertType.INFO);
display.setCurrent(at);
}
}
}
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