Android: Is a while loop efficient?

Question

Currently I'm using the following construction:

while(continue)
{
    if(somethingChanged)
    {
        draw();
    }
}

Is this way of waiting efficient, or is there a better way to do this?

--

As requested, more info:

I'm drawing on a SurfaceView, with a Thread locking the Canvas and calling the onDraw(Canvas) method. When the thing I have drawn hasn't changed, I don't need to call the onDraw(Canvas) method, so I keep a boolean somethingChanged.

Also, when I touch the screen, I draw let's say a circle at the point of touch, so when I'm touching the screen, somethingChanged is true.

Answer 1

You can also use a wait() and make the other threads notify() this one when something has changed (if the somethingChanged is changed by other threads).