Récupérer KeyCode Flèches

**celk19** · 07/05/2008, 18h01

Bonjour

Je cherche à faire une petite application sur un PDA en JAVA et pour cela, j'ai besoin d'utiliser les flèches et de paramètrer leurs fonctions. Cependant je ne trouve pas leur KeyCode.

Merci

**guenievre** · 08/05/2008, 12h10

Tiens j'avais trouvé sur le net le code d'une petite application qui t'indiques les codes des touches :

KeyCode.java :

Code :

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import javax.microedition.lcdui.Display;
import javax.microedition.midlet.MIDlet;
 
/**
 * A simple MIDlet to display the Key Codes of the handset.
 */
public class KeyCode extends MIDlet {
 
	public void startApp() {
		KeyCodeCanvas kcc = new KeyCodeCanvas(this);
		Display.getDisplay(this).setCurrent(kcc);
	}
 
	public void pauseApp() {
	}
 
	public void destroyApp(final boolean unconditional) {
	}
 
	public void quit() {
		notifyDestroyed();
	}
 
}

KeyCodeCanvas.java :

Code :

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import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
 
/**
 * A canvas that displays the key code corresponding to the key pressed.
 */
public class KeyCodeCanvas extends Canvas {
 
	private KeyCode myMIDlet;
	private String myCurrentCode = "none";
	private boolean myPoundPressed = false;
 
	/**
         * just set a handle back to the MIDlet.
         */
	public KeyCodeCanvas(final KeyCode midlet) {
		this.myMIDlet = midlet;
	}
 
	/**
         * Paint the key code corresponding to the key that has been pressed.
         * 
         * Note that this is far from optimized!!!
         */
	public void paint(final Graphics g) {
		// get the size of the painting region:
		int width = getWidth();
		int hcenter = width / 2;
		int height = getHeight();
 
		// clear the screen by coloring everything white:
		g.setColor(0xffffff);
		g.fillRect(0, 0, width, height);
 
		// write the instructions at the top in black:
		g.setColor(0x000000);
		Font font = g.getFont();
		int fontHeight = font.getHeight();
		g.drawString("to exit", hcenter, 0, Graphics.TOP | Graphics.HCENTER);
		g.drawString("press # twice", hcenter, fontHeight + 1, Graphics.TOP | Graphics.HCENTER);
 
		// Now draw the key code number:
		g.drawString(this.myCurrentCode, hcenter, 2 * (fontHeight + 1), Graphics.TOP
				| Graphics.HCENTER);
 
	}
 
	/**
         * Record the keycode.
         */
	public void keyPressed(final int keyCode) {
		// check for the pound key, and if this is
		// the second pound in a row, quit:
		if (keyCode == Canvas.KEY_POUND) {
			if (this.myPoundPressed) {
				this.myMIDlet.quit();
				return;
			} else {
				this.myPoundPressed = true;
			}
		} else {
			this.myPoundPressed = false;
		}
		// Now set the key code:
		this.myCurrentCode = (new Integer(keyCode)).toString();
		// Now display it:
		repaint();
	}
 
}