package org.mcyrrer.ttff;import javax.microedition.lcdui.Command;import javax.microedition.lcdui.CommandListener;import javax.microedition.lcdui.Display;import javax.microedition.lcdui.Displayable;import javax.microedition.location.Location;import javax.microedition.location.LocationException;import javax.microedition.location.LocationListener;import javax.microedition.location.LocationProvider;import javax.microedition.midlet.MIDlet;import java.util.Calendar;import javax.microedition.midlet.MIDletStateChangeException;/** * Main class that sets up an JSR179 locationprovider and use it to calculate Time To First Fix that is presentated in Class MIDPCanvas * @version 1.0 * @author Mattias Gustavsson */public class MainClass extends MIDlet implements CommandListener, LocationListener {    private MIDPCanvas appCanvas;    private Display display;    private boolean ttffDone = false;    private long timerStarted;    LocationProvider myLocationProvider;    Calendar date = Calendar.getInstance();    final Command exitCommand = new Command("Exit", Command.EXIT, 1);    protected void startApp() throws MIDletStateChangeException {        /*         *Set up the Canvas we use and adds softkeys and sets a commandlistener          */         try {            appCanvas = new MIDPCanvas();            display = Display.getDisplay(this);            display.setCurrent(appCanvas);            // Set up this canvas to listen to command events            this.appCanvas.setCommandListener(this);            // Add the Exit command            this.appCanvas.addCommand(exitCommand);        } catch (Exception e) {            e.printStackTrace();        }        /*         * Set up the location provider and sets a listener to update the signal every 1 second.         */        try {            myLocationProvider = LocationProvider.getInstance(null);            myLocationProvider.setLocationListener(this, 1, 1, 1);            //Timer started. This is the base time that we use later on to calculate the TTFF            timerStarted = System.currentTimeMillis();        } catch (LocationException ex) {            ex.printStackTrace();        }    }    protected void pauseApp() {        throw new UnsupportedOperationException("Not supported yet.");    }    protected void destroyApp(boolean arg0) throws MIDletStateChangeException {        throw new UnsupportedOperationException("Not supported yet.");    }    public void locationUpdated(LocationProvider arg0, Location locaction) {                if (!ttffDone) {            /*             * myLocationProvider need to up and running (state=AVAILABLE). Otherwise we will not get any signal to work with             */            if (myLocationProvider.getState() == LocationProvider.AVAILABLE) {                /*                 * our location need to have all gps data (isValid) to be used for determin TTFF                 */                if (locaction.isValid()) {                    long timeresult = (System.currentTimeMillis() - timerStarted) / 1000;                    appCanvas.setText("TTFF=" + Long.toString(timeresult) + "sec");                    ttffDone = true;                } else {                    long timeresult = (System.currentTimeMillis() - timerStarted) / 1000;                    appCanvas.setText(Long.toString(timeresult) + "sec");                }            }            if (myLocationProvider.getState() == LocationProvider.TEMPORARILY_UNAVAILABLE) {                appCanvas.setText("Location TEMPORARILY_UNAVAILABLE:");            }            if (myLocationProvider.getState() == LocationProvider.OUT_OF_SERVICE) {                appCanvas.setText("Location OUT_OF_SERVICE:");            }        }        appCanvas.repaint();    }    /**     *      * @param arg0     * @param arg1     */    public void providerStateChanged(LocationProvider arg0, int arg1) {    }    /**     *      * @param c     * @param arg1     */    public void commandAction(Command c, Displayable arg1) {        if (c == exitCommand) {            this.notifyDestroyed();        }    }}