airtextdemo.java

Java无线传感技术Sun SPOT的一个程序

/*
* Copyright (c) 2006 Sun Microsystems, Inc.
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to 
* deal in the Software without restriction, including without limitation the 
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 
* sell copies of the Software, and to permit persons to whom the Software is 
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in 
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
* DEALINGS IN THE SOFTWARE.
 **/       
package org.sunspotworld.demo;

import com.sun.spot.sensorboard.EDemoBoard;
import com.sun.spot.sensorboard.peripheral.ITriColorLED;
import com.sun.spot.sensorboard.peripheral.IAccelerometer3D;
import java.io.IOException;
import javax.microedition.midlet.MIDletStateChangeException;

/**
 * AirText Demo
 *
 * Deploy on a Spot with an eDemoBoard attached. When you shake the
 * Sun SPOT back and forth, the RGB LEDs will flash in a pattern
 * that will magically spell out words in the air.
 *
 * @author roger (modifications by vipul)
 */

public class AirTextDemo extends javax.microedition.midlet.MIDlet {
    
    protected void startApp() throws MIDletStateChangeException {
        System.out.println("StartApp");
        // Initialize and start the application
        EDemoBoard demoBoard = EDemoBoard.getInstance();
        AirText disp = new AirText(demoBoard);
        // Main loop of the application
        while (true) {
            disp.setColor(255, 0, 0);
            disp.swingThis("HI!", 17);
            disp.setColor(0, 0, 255);
            disp.swingThis("This", 10);
            disp.setColor(255, 0, 0);
            disp.swingThis("is a", 10);      
            disp.setColor(0, 255, 0);
            disp.swingThis("Sun", 8);
            disp.setColor(255, 0, 0);
            disp.swingThis("SPOT", 3);
            disp.setColor(0, 255, 0);
            disp.swingThis("SPOT", 3);
            disp.setColor(0, 0, 255);
            disp.swingThis("SPOT", 3);
            disp.setColor(0, 255, 0);
            disp.swingThis("SPOT", 3);
            disp.setColor(255, 0, 0);
            disp.swingThis("SPOT", 3);
            disp.swingThis(" ", 3);
        }
    }
    
    protected void pauseApp() {
    }
    
    /**
     * Called if the MIDlet is terminated by the system.
     * I.e. if startApp throws any exception other than MIDletStateChangeException,
     * if the isolate running the MIDlet is killed with Isolate.exit(), or
     * if VM.stopVM() is called.
     * 
     * It is not called if MIDlet.notifyDestroyed() was called.
     *
     * @param unconditional If true when this method is called, the MIDlet must
     *    cleanup and release all resources. If false the MIDlet may throw
     *    MIDletStateChangeException  to indicate it does not want to be destroyed
     *    at this time.
     */
    protected void destroyApp(boolean unconditional) throws MIDletStateChangeException {
        ITriColorLED [] leds = EDemoBoard.getInstance().getLEDs();
        for (int i = 0; i < 8; i++) {           // turn off the LEDs when we exit
            leds[i].setOff();
        }
    }
}