Caused by: java.lang.NullPointerException:

Question

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.andremion.counterfab.CounterFab.setCount(int)' on a null object reference

Code

@Override
protected void onResume() {
    super.onResume();

   fab.setCount(new Database(getBaseContext()). getCountCart());

    if (adapter!=null )
    {
        adapter.startListening();
    }
}

Share your full code here – Mayur Patel May 27 '19 at 09:11 — Mayur Patel, May 27 '19 at 09:11
on a onResume just check `if(fab != null)`. – Mehul Solanki May 27 '19 at 09:29 — Mehul Solanki, May 27 '19 at 09:29
ok done ..after run it shows black screen why? – MANESH K May 27 '19 at 09:42 — MANESH K, May 27 '19 at 09:42

score 1 · Accepted Answer · answered May 27 '19 at 09:20

1

It seems that you did not initialize the fab variable. Thus you receive a NullPointerException. As this variable seems to be global, you should at any place initialize the fab variable in your code before you call functions on it. Since you use it already in the onResume() function, you'd best initialize it in your onCreate()

answered May 27 '19 at 09:20

Chris623

2,239
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already initialized in onCreate() method – MANESH K May 27 '19 at 09:27

Caused by: java.lang.NullPointerException:

1 Answers1