CODEWITHSUNDEEP
androidandroid-actionbarnavigation-drawer
John
John

Reputation: 65

Change Fragment name in NavigationDrawer

Hello I have Implemented a activity where i used navigation drawer.Its work fine but sometimes app is crashing because of actionbar.it throw nullpointerexception

I called fragment as follows

Upvotes: 1

Views: 143

Answers (1)

marmor
marmor

Reputation: 28229

You can't call getActivity from onCreateView, as it may return null, if the Activity isn't attached yet to the Fragment.

Activities and Fragments have separate lifecycles, getActivity can be null while your fragment is in process of preparation.

You can move your code that depends on getActivity to the Fragment.onActivityCreated(Bundle) callback. Note that it is called after onCreateView.

See more info here: https://developer.android.com/guide/components/fragments.html#CoordinatingWithActivity

UPDATE: As requested, here's a fixed code - I just split some of your onCreateView method into onActivityCreated

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    person = new Person();
    str = person.getFragment();
    view = inflater.inflate(R.layout.fragment_product_list, container, false);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    cd = new ConnectionDetector(getActivity());
    parent = (AppCompatActivity) getActivity();
    if (getArguments() != null) {
        title = getArguments().getString("Title");
        if (title != null) {
            parent.getSupportActionBar().setTitle(title);
        }
    }
}

Upvotes: 1

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