Question

I am new to android development, making a simple game and using onKeyDown(…..) function but it works only for 1 key at a time, how to handle 2 keys at a time means can i move right or left with continous firing.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub
    switch (keyCode){
    case KeyEvent.KEYCODE_DPAD_RIGHT:

        bottle_movx+=2;

    break;
    case KeyEvent.KEYCODE_DPAD_LEFT:

        bottle_movx-=2;
        break;

    case KeyEvent.KEYCODE_DPAD_DOWN:
        fire=bottle_movx;
        firechk=true;
        break;      

    }

    invalidate();
    return super.onKeyDown(keyCode, event);

}

Answer 1

EDIT: Perhaps this could be of some help?
How do I handle simultaneous key presses in Java?

Quote:
One way would be to keep track yourself of what keys are currently down.
When you get a keyPressed event, add the new key to the list; when you get a keyReleased event, remove the key from the list.
Then in your game loop, you can do actions based on what’s in the list of keys.

EDIT 2: I also found this link which could be useful:
How do I handle multiple key presses in a Java Applet?