NullPointerException LayoutInflater.from(context) - Fragment Android

Question

I have implement Nested Fragments. Child fragment contains BaseAdapter. When I switching(replace) child fragments then I am getting Nullpointer exception. Code:

public MyAdapter(final Context context,
            final List<CusomObject> CusomObjectList) {
        mInflater = LayoutInflater.from(context);
        this.CusomObjectList = CusomObjectList;     
    }

I am getting error in this line - mInflater = LayoutInflater.from(context);

I passed getActivity() in MyAdapter constructor from Fragment.

Code:

adapter = new MyAdapter(getActivity(), customList);
listView.setAdapter(adapter);

try after changing `final Context context` to `final Activity activity` and use `mInflater=activity.getLayoutInflater()` — ρяσѕρєя K, Sep 29 '14 at 06:33

Tal Kanel · Accepted Answer · 2014-09-29T06:34:31.560

5

I passed getActivity() in MyAdapter constructor from Fragment.

that's extactly the problem.

when Fragment constructor is called - the reference to the Activity is still not initiated.

instead - you should do any object creations or initializations that depends on Activity context from the Fragment's onCreate() method.

in general, it's not recommended at all to override Fragment constructor, exactly like that you don't override Activity constructor, but only it life-cycle callbacks.

more info in - http://developer.android.com/guide/components/fragments.html

edited Sep 29 '14 at 06:34

answered Sep 29 '14 at 06:29

Tal Kanel

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Thanks, Your answer solved my problem. So I accepted your answer. – Slk Oct 01 '14 at 04:41

score 0 · Answer 2 · answered Sep 29 '14 at 06:23

Use another variable.

Context mContext;

public MyAdapter(final Context context,
        final List<CusomObject> CusomObjectList) {
    this.mContext = context;
    mInflater = LayoutInflater.from(mContext);
    this.CusomObjectList = CusomObjectList;     
}

NullPointerException LayoutInflater.from(context) - Fragment Android

2 Answers2