Android : Android - enter database

I want to enter my database every 30 seconds, that is why I open it in

h.postDelayed(new Runnable(){
                public void run(){h.postDelayed(this, delay0);
                }
            }, delay0)

}

But I need to change the this in the expression (cannot be applied to Runnable) and right now I don't know how to solve that.

database db = new database(this);