Key Event with Canvas : Key Event « J2ME « Java
Key Event with Canvas
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import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class EventEx3 extends MIDlet {
Display display;
Command exit;
public EventEx3() {
display = Display.getDisplay(this);
}
public void destroyApp (boolean unconditional) {
}
public void pauseApp () {
System.out.println("App paused.");
}
public void startApp () {
display = Display.getDisplay(this);
Canvas canvas = new Canvas() { // anonymous class
public void paint(Graphics g) {
}
protected void keyPressed(int keyCode) {
if (keyCode > 0) {
System.out.println("keyPressed " +((char)keyCode));
} else {
System.out.println("keyPressed action " +getGameAction(keyCode));
}
}
protected void keyReleased(int keyCode) {
if (keyCode > 0) {
System.out.println("keyReleased " +((char)keyCode));
} else {
System.out.println("keyReleased action " +getGameAction(keyCode));
}
}
}; // end of anonymous class
exit = new Command("Exit", Command.STOP, 1);
canvas.addCommand(exit);
canvas.setCommandListener(new CommandListener() {
public void commandAction(Command c, Displayable d) {
if(c == exit) {
notifyDestroyed();
} else {
System.out.println("Saw the command: "+c);
}
}
});
display.setCurrent(canvas);
}
}
