从android文本文件阅读时随机化问题数组

Question

https://github.com/gitssk/quizfun/blob/master/res/raw/Questions.txt

 private void loadQuestions() throws Exception {
        try {
        InputStream questions = this.getBaseContext().getResources()
                .openRawResource(R.raw.questions);
        bReader = new BufferedReader(new InputStreamReader(questions));
        StringBuilder quesString = new StringBuilder();
        String aJsonLine = null;
        while ((aJsonLine = bReader.readLine()) != null) {
            quesString.append(aJsonLine);
        }
        Log.d(this.getClass().toString(), quesString.toString());
        JSONObject quesObj = new JSONObject(quesString.toString());
        quesList = quesObj.getJSONArray("Questions");
        Log.d(this.getClass().getName(),
                "Num Questions " + quesList.length());
        } catch (Exception e){

        } finally {
            try {
                bReader.close();
            } catch (Exception e) {
                Log.e("", e.getMessage().toString(), e.getCause());
            }

        }


    }







https://github.com/gitssk/quizfun/blob/master/src/ssk/quizfun/QuizFunActivity.java

Answer 1

我不会发布太多代码，因为我认为你应该自己尝试。其实没那么难。不过我会给你一个方法。

您有queslist=quesobj.getJSONArray（“questions”）；。所以queslist是一个问题列表，它是一个JSONArray。你想洗牌这个。只要这样做：

>

获取queslist数组的长度。我们叫它len.

创建一个名为quesOrder的简单arrayList，该arrayList包含整数0 to Len。

List<Integer> quesOrder = new ArrayList<>();
for (int i = 0; i <= len; i++)
{
 quesOrder.add(i);
}