|
package j2me.study;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
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.lcdui.Gauge;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
/**
* @author Administrator
*
*/
public class AlertDemo extends MIDlet {
private final static Command CMD_EXIT = new Command("Exit",Command.EXIT,1);
private final static Command CMD_SHOW = new Command("Show",Command.SCREEN,1);
private final static String[] typeStrings={
"Alarm","Confirmation","Error","Info","Warning"
};
private final static String[] timeoutStrings={
"2 Seconds","4 Seconds","8 Seconds","Forever"
};
private final static int SECOND =1000;
private Display display;
private boolean firstTime;
private Form mainForm;
public AlertDemo(){
firstTime = true;
mainForm = new Form("Alert Options");
}
/* (non-Javadoc)
* @see javax.microedition.midlet.MIDlet#destroyApp(boolean)
*/
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see javax.microedition.midlet.MIDlet#pauseApp()
*/
protected void pauseApp() {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see javax.microedition.midlet.MIDlet#startApp()
*/
protected void startApp() throws MIDletStateChangeException {
// TODO Auto-generated method stub
display =Display.getDisplay(this);
showOption();
}
private void showOption(){
if(firstTime){
ChoiceGroup types = new ChoiceGroup("Type",ChoiceGroup.POPUP,typeStrings,null);
mainForm.append(types);
ChoiceGroup timeouts = new ChoiceGroup("Timeout",ChoiceGroup.POPUP,timeoutStrings,null);
mainForm.append(timeouts);
String[] optionStrings ={"Show Indicator"};
ChoiceGroup options= new ChoiceGroup("Options",Choice.MULTIPLE,optionStrings,null);
mainForm.append(options);
mainForm.addCommand(CMD_SHOW);
mainForm.addCommand(CMD_EXIT);
mainForm.setCommandListener(new AlerListener(types,timeouts,options));
firstTime =false;
}
display.setCurrent(mainForm);
}
private class AlerListener implements CommandListener{
AlertType[] alertTypes={
AlertType.ALARM,AlertType.CONFIRMATION,AlertType.ERROR,
AlertType.INFO,AlertType.WARNING
};
ChoiceGroup typesCG;
int[] timeouts={2 * SECOND,4 * SECOND,8 * SECOND,Alert.FOREVER};
ChoiceGroup timeoutsCG;
ChoiceGroup indicatorCG;
public AlerListener(ChoiceGroup types,ChoiceGroup timeouts,ChoiceGroup indicator){
typesCG = types;
timeoutsCG = timeouts;
indicatorCG = indicator;
}
public void commandAction(Command c, Displayable d) {
// TODO Auto-generated method stub
if(c == CMD_SHOW){
int typeIndex = typesCG.getSelectedIndex();
Alert alert = new Alert("Alert");
alert.setType(alertTypes[typeIndex]);
int timeoutIndex = timeoutsCG.getSelectedIndex();
alert.setTimeout(timeouts[timeoutIndex]);
alert.setString(typeStrings[typeIndex]+" Alert,Running "+timeoutStrings[timeoutIndex]);
boolean [] SelectedFlags = new boolean[1];
indicatorCG.getSelectedFlags(SelectedFlags);
if(SelectedFlags[0]){
Gauge indicator = createIndicator(timeouts[timeoutIndex]);
alert.setIndicator(indicator);
}
display.setCurrent(alert);
}else if(c == CMD_EXIT){
destroyApp(false);
notifyDestroyed();
}
}
protected void destroyApp(boolean arg0) {
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
private Gauge createIndicator(int maxValue){
if(maxValue == Alert.FOREVER){
return new Gauge(null,false,Gauge.INDEFINITE,Gauge.CONTINUOUS_RUNNING);
}
final int max = maxValue/SECOND;
final Gauge indicator = new Gauge(null,false,max,0);
new Thread(){
public void run(){
int value =0;
while(value < max){
indicator.setValue(value);
++value;
try{
Thread.sleep(1000);
}catch(InterruptedException ie){
}
}
}
}.start();
return indicator;
}
}
}
|
