code to be executed every x milliseconds, changeable

I have a code to be executed every x milliseconds, where x is changeable during the app life cycle.

Right now I use the postDelayed function of an handler, but I am not able to manage the situation when the delay changes.

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        // do some staff

        handler.postDelayed(this, x);
    }
}, x);   

My problem is that in other parts of the app the x value can change, and I need to execute the code in the run function instantly after the change, and continue with the infinite execution of the delayed code (with new value of x).

Save a reference to your Runnable and keep the delay as class variable like this:

private Long x = 1000L;
private Runnable r = new Runnable() {
    @Override
    public void run() {
        // do some staff
        handler.postDelayed(this, x);
    }
}

then

handler.post(r);

to kick it off.

Then create a setter and getter for x that takes care of the change:

setX(Long: value){ 
    if(x != value){
        x = value
        handler.removeCallbacks(r);
        //run immediately
        handler.post(r);
    }
}

getX(){ return x };