将值从片段传递到另一个

时间:2020-05-02 04:36:31

标签: java android fragment

我有两个片段。第一个从Firebase获取数据,第二个使用数据。我在第一个片段中使用setArguments()设置数据束,并在第二个片段中使用getArguments使用它。但是我消费时会得到一个空值。以下是片段。

FirstFragment;

firebaseFirestore.collection("QuizList")
                .document(quizId).collection("Results")
                .document(currentUserId).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                if(task.isSuccessful()){
                    DocumentSnapshot result = task.getResult();

                    Long correct = result.getLong("correct");
                    Long wrong = result.getLong("wrong");
                    Long missed = result.getLong("unanswered");

                    resultCorrect.setText(correct.toString());
                    resultWrong.setText(wrong.toString());
                    resultMissed.setText(missed.toString());

                    //Calculate Progress
                    Long total = correct + wrong + missed;
                    Long percent = (correct*100)/total;

                    ListFragment listFragment = new ListFragment();
                    Bundle bundle = new Bundle();
                    bundle.putLong("total", total);
                    bundle.putLong("percent", percent);
                    listFragment.setArguments(bundle);

                    resultPercent.setText(percent + "%");
                    resultProgress.setProgress(percent.intValue());
                }
            }
        }); 

SecondFragment:

@Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

Bundle bundle = this.getArguments();
        if (bundle != null) {
        Long total = getArguments().getLong("total", 0);
        Long percent = getArguments().getLong("percent",0);


        Toast.makeText(getActivity(),String.valueOf(total),Toast.LENGTH_SHORT).show();

        }
}

有什么帮助吗?谢谢!

0 个答案:

没有答案