I'm just trying to figure out the best approach for running a scolling background on an android device. The method I have so far.... its pretty laggy. I use threads, which I believe is not the best bet for android platforms

@Override
    public void run() {
        // Game Loop
        while(runningThread){
            //Scroll background down
            bgY += 1;

            try {
                this.postInvalidate();
                t.sleep(10);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        
    }

where postinvalidate in the onDraw function simply pushings the background image down

canvas.drawBitmap(backgroundImage, bgX, bgY, null);

Thanks in advance

UPDATE & SOLUTION

Thank you for everyone helping me. I came across this:

post http://stackoverflow.com/questions/1430741/how-to-draw-lots-of-bitmaps-on-screen-in-an-android-game-without-slow-performance

Helped my problem a lot. However, Seemed I was creating bitmaps in the onDraw every time is was caused, meaning that was doing 95% of the slowing down. oops :)

Below is my inner class in my surfaceview for reference purposes

class MapThread extends Thread{
    private Map map;
    private SurfaceHolder holder;
    private boolean run = false;
    
    public MapThread(Map map, SurfaceHolder holder){
        this.holder = holder;
        this.map = map;
        setRunning(true);
    }
    
    public void setRunning(boolean run){
        this.run = run;
    }
    
    @Override
    public void run(){
        while(run){
            try{
                Canvas c = null;

                 try {
                       c = holder.lockCanvas(null);
                       synchronized (holder) {
                            map.onDraw(c);
                     }
                 } finally {

                     if (c != null) {
                         holder.unlockCanvasAndPost(c);
                     }
                 }
        }
    }
}