[Solved] Suppress NPE Warning for getSupportActionBar() when called inside Fragments [duplicate]

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Because you don’t put checks for NullPointerException
((AppCompatActivity) getActivity()).getSupportActionBar() gives actionbar object

but you are calling directly by

((AppCompatActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(false)

that is why system gives warning for NullPointerException.

    if((getActivity()) != null) {
        ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
        if(actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(false);
        }
    }

Put above code. Your warning will remove.

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solved Suppress NPE Warning for getSupportActionBar() when called inside Fragments [duplicate]