touchscreenmidlet.java

检测手机是否支持触摸支持的Midlet。

/*
 *	 * @(#) TouchScreenMidlet.java	1.15 2007-11-13
 */
import java.io.IOException;
import java.util.Enumeration;
import javax.microedition.io.*;
import javax.microedition.io.file.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;


public class TouchScreenMidlet extends MIDlet implements CommandListener
{

    private Display display;  
    private Command exitCommand;  
	private NewTouchCanvas  touchCanvas;
    public TouchScreenMidlet()
    {
        System.out.println("Hello");
        this.display = Display.getDisplay(this);
        this.exitCommand = new Command("退出", Command.EXIT, 1);
    }


    public void startApp(){
		
		touchCanvas = new  NewTouchCanvas();
		display.setCurrent(touchCanvas);
	}

    public void pauseApp(){}

    public void destroyApp(boolean unconditional)
    {
        this.notifyDestroyed();
    }

    public void commandAction(Command command, Displayable displayable)
    {
        if (command == this.exitCommand)
        {
            this.destroyApp(true);
        }
    }
}


class NewTouchCanvas extends Canvas
{
    private String action = "";
    public NewTouchCanvas()
    {
        super();
    }
    protected void paint(Graphics g)
    {
        g.setColor(255, 255, 255);
        g.fillRect(0, 0, getWidth(), getHeight()); 
        g.setColor(0, 0, 0);
        if (hasPointerEvents())
        {
            g.drawString("支持触摸", 10, 10, 0);
        }
        else
        {
            g.drawString("不支持触摸", 10, 10, 0);
        }
        if (this.hasPointerMotionEvents())
        {
            g.drawString("支持拖动", 10, 20, 0);
        }
        else
        {
            g.drawString("不支持拖动", 10, 20, 0);
        }
        g.drawString(action, 10, 30, 0);
    }
    protected void pointerPressed(int x, int y)
    {
        action = "<pp> x :" + x + "|" + " y :" + y;
        repaint();
    }
    protected void pointerReleased(int x, int y)
    {
        action = "<pr> x :" + x + "|" + " y :" + y;
        repaint();
    }
    protected void pointerDragged(int x, int y)
    {
        action = "<pd> x :" + x + "|" + " y :" + y;
        repaint();
    }

}