lbsmainui.java

实现了一个基于j2me移动gps定位系统

/*
 * $Id: LBSMainForm.java 283 2008-08-06 02:56:37Z khanh.lnq $
 * $URL: https://jvnmobilegis.googlecode.com/svn/trunk/src/org/javavietnam/gis/client/midp/ui/LBSMainForm.java $
 * $Author: khanh.lnq $
 * $Revision: 283 $
 * $Date: 2008-08-06 09:56:37 +0700 (Wed, 06 Aug 2008) $
 *
 * ====================================================================
 *
 * Copyright (C) 2006-2007 by JVNGIS
 *
 * All copyright notices regarding JVNMobileGIS MUST remain
 * intact in the Java codes and resource files.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Support can be obtained from project homepage at:
 * http://code.google.com/p/jvnmobilegis/
 *
 * Correspondence and Marketing Questions can be sent to:
 * khanh.lnq AT gmail.com
 *
 * @version: 1.0
 * @author: Khanh Le
 * @Date Created: 22 Jun 2007
 */

package org.javavietnam.gis.client.midp.ui;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;

import org.javavietnam.gis.client.midp.util.GpsBt;
import org.javavietnam.gis.client.midp.util.Location;

/**
 * @author Administrator
 * 
 */
public class LBSMainUI extends Form implements CommandListener {

    private String latitude;
    private String longitude;
    private Command cmdBack;
    private Command cmdSearchGps;
    private Command cmdShowMeOnMap;
    private StringItem gpsState;
    private StringItem quality;
    private StringItem latitudeText;
    private StringItem longitudeText;
    private StringItem time;
    private StringItem satellite;

    private boolean active = false;

    private final UIController uiController;

    /**
     * @param title
     */
    public LBSMainUI(UIController uiController) {
        super("Gps Info");
        this.uiController = uiController;

        setCommandListener(this);
        cmdSearchGps = new Command(uiController.getString(UIConstants.SEARCH),
                Command.ITEM, 1);
        cmdShowMeOnMap = new Command(uiController
                .getString(UIConstants.SHOW_ME_ON_MAP), Command.ITEM, 2);
        cmdBack = new Command(uiController.getString(UIConstants.BACK),
                Command.BACK, 4);
        addCommand(cmdShowMeOnMap);
        addCommand(cmdSearchGps);
        addCommand(cmdBack);

        gpsState = new StringItem(uiController.getString(UIConstants.STATUS),
                uiController.getString(UIConstants.NO_GPS));
        quality = new StringItem(uiController.getString(UIConstants.QUALITY),
                uiController.getString(UIConstants.NO_GPS));
        latitudeText = new StringItem(uiController
                .getString(UIConstants.LATITUDE), uiController
                .getString(UIConstants.NO_GPS));
        longitudeText = new StringItem(uiController
                .getString(UIConstants.LONGITUE), uiController
                .getString(UIConstants.NO_GPS));
        time = new StringItem(uiController.getString(UIConstants.TIME), "NA");
        satellite = new StringItem(uiController
                .getString(UIConstants.SATELLITE), uiController
                .getString(UIConstants.NO_GPS));

        append(gpsState);
        append(quality);
        append(latitudeText);
        append(longitudeText);
        append(time);
        append(satellite);
    }

    public void updateLocation(GpsBt gpsBt) {
        gpsState.setText(uiController.getString(UIConstants.CONNECTED));
        Location location = gpsBt.getLocation();
        quality.setText(location.quality + "");

        latitude = location.latitude;
        longitude = location.longitude;

        latitudeText.setText(latitude + location.northHemi);
        longitudeText.setText(longitude + location.eastHemi);
        time.setText(location.utc);
        satellite.setText(location.nSat + "");
    }

    public void disconnectedAlert() {
        gpsState.setText(uiController.getString(UIConstants.DISCONNECTED));
    }

    public void commandAction(Command cmd, Displayable display) {
        setActive(false);
        if (cmd == cmdSearchGps) {
            uiController.gpsUIRequested();
            uiController.gpsSearchingRequested();
        } else if (cmd == cmdShowMeOnMap) {
            if (gpsState.getText().trim().equals(
                    uiController.getString(UIConstants.CONNECTED))
                    && latitudeText.getText().trim().indexOf("null") < 0) {
                uiController.viewMapRequested();
                uiController.getMapViewUI().updateMyNMEALocation(latitude,
                        longitude);
            } else {
                uiController.showErrorAlert(uiController
                        .getString(UIConstants.NO_GPS), this);
            }
        } else if (cmd == cmdBack) {
            uiController.viewMapRequested();
        }
    }

    /**
     * @param active
     *            the active to set
     */
    public void setActive(boolean active) {
        this.active = active;
    }

    /**
     * @return the active
     */
    public boolean isActive() {
        return active;
    }
}