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Question

我在MainActivity中使用了三个片段。

它来自fata例外：主要。说， RequestFragment.class第54行是异常的原因：

adapter = new RequestAdapter(getListView().getContext(), mRequests);

RequestAdapter 是一个分开实现的类。

谢谢！ 的代码：

@Override

public void onResume() {

        super.onResume();

        getActivity().setProgressBarIndeterminateVisibility(true);
        currentUserName = ParseUser.getCurrentUser().getUsername();
        getActivity().setProgressBarIndeterminate(true);
        ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(ParseConstants.CLASS_ACTIVITYREQUEST);
        query.whereEqualTo(ParseConstants.KEY_RECIPIENTNAME, currentUserName);
        //Reorder the result according to the time users shake the phone
        query.addDescendingOrder(ParseConstants.KEY_CREATEDAT);
        query.findInBackground(new FindCallback<ParseObject>() {

            @Override
            public void done(List<ParseObject> requests, ParseException e) {
                getActivity().setProgressBarIndeterminateVisibility(false);
                if(e == null){
                    mRequests = requests;
                    adapter = new RequestAdapter(getListView().getContext(), mRequests);
                    setListAdapter(adapter);
                }
                else{
                    Log.d(TAG, "no request");
                }
            }
        });
    }

Answer 1

你必须在这里改变

adapter = new RequestAdapter(getListView().getContext(), mRequests);

到

adapter = new RequestAdapter(getActivity(), mRequests);