SurfaceView gameloop

Question

Could you suggest an implementation of a game loop with interpolation for SurfaceView and thread?

i have this, but it doesnt work.

while( running ) {
        Canvas canvas = null;

        loops = 0;
        while (System.currentTimeMillis() > next_game_tick
                && loops < MAX_FRAMESKIP) {


            player.getInfo(towardPointX, uiClicked);

            Collision(all_cars);
            running = player.isGameOn();

            next_game_tick += SKIP_TICKS;
            loops++;
        }

        interpolation = (System.currentTimeMillis() + SKIP_TICKS - next_game_tick
                / (double) SKIP_TICKS);
        background1.update(interpolation);
        moveCars(all_cars, interpolation);
        canvas = surfaceHolder.lockCanvas();
        background1.draw(canvas);
        canvasDraw(canvas,all_cars);
        surfaceHolder.unlockCanvasAndPost(canvas);

    }}}
```