Question

I am trying to end an never ending circle. I need to call a void that is not static from another class. The reason that I do not make it static is that some things are very hard to make static. (Everything inside a static void needs to be static).

I am trapped in a circle where I need to call a non static void from another class. I can not make it static because it some code do not like to be passed.

Till now I solved it sort of by a handler:

public static void change(){
//This is called to change a boolean
start=true;}

private void startDone(){
int timeBetweenChecks = 50;
final Handler h = new Handler();
h.postDelayed(new Runnable(){
    public void run(){
        if (start==false){
           startDone();

        } else{  
            //Do something          
        }          
        }
    }
}, timeBetweenChecks);

};

The problem with this is that I have to run a handler that is checking if something has changed pretty often(In my case).

Is there any way of calling the non static startDone() directly?

Answer 1

The answer to your question is: No, you cannot call a non-static method from a static method without an instance of the class containing the non-static method.

To solve your problem: maybe the best way would be to broadcast an intent from change().

Something like:

public static void change(Context c){
    start=true;
    c.sendBroadcast(new Intent("CHANGE_HAS_BEEN_CALLED"));
}

Then in the non-static code of your activity you can register a receiver like this:

IntentFilter filter = new IntentFilter();
filter.addAction("CHANGE_HAS_BEEN_CALLED");
registerReceiver(new BroadcastReceiver() {
    @Override public void onReceive(Context context, Intent intent) {
       if (start==false){
           startDone();

        } else{  
            //Do something          
        }
    }
}, filter);