Android 如何从按钮点击事件的json响应中获取随机问题？

//json响应和解析代码

private void ListQuestion() {
        try {
            if (FriendZoneSelectFriendsWith.choose_gender.equals("Boy")) {
                NAME_JSON = "boysquestion.json";
            } else {
                NAME_JSON = "girlsquestion.json";
            }
            BufferedReader jsonReader = new BufferedReader(new InputStreamReader(getAssets().open(NAME_JSON)));
            StringBuilder jsonBuilder = new StringBuilder();
            for (String line = null; (line = jsonReader.readLine()) != null; ) {
                jsonBuilder.append(line).append("\n");
            }

            // Parse Json
            JSONTokener tokener = new JSONTokener(jsonBuilder.toString());
            JSONArray jsonArray = new JSONArray(tokener);

            Log.e("JSON LENGTH-->", jsonArray.length() + "");

            final Integer[] arr = new Integer[jsonArray.length()];
            for (int i = 0; i < arr.length; i++) {
                arr[i] = i;
            }
            Collections.shuffle(Arrays.asList(arr));
            Log.e("RANDOM", Arrays.asList(arr) + "");

            for (int i = 1; i < jsonArray.length(); i++) {
                jo_inside = jsonArray.getJSONObject(i);
                question = jo_inside.getString("question");

                for (int j = 1; j <= 25; j++) {
                    if (i == Arrays.asList(arr).get(j)) {
                        Log.e("Details-->", jo_inside.getString("question"));
                        question1 = jo_inside.getString("question");
                        tvQuestionText.setText(question1);

                        //Change question on click
                        imUp.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                for (int k = 1; k <= 25; k++) {
                                    if (k == Arrays.asList(arr).get(k)) {
                                        Log.d("textview", tvQuestionText.getText().toString());
                                        tvQuestionText.setText(question1);
                                    }

                                }
                            }
                        });
                        //    Log*/.d("Textview", tvQuestionText.getText().toString());
                    }


                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        } catch (Exception e) {
        }
    }

我想获得随机问题，然后在点击按钮后将其设置为textview。

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如何在点击按钮时获得随机问题。帮助我获取示例代码。我尝试过一些方法，但没有一种有效。

您可以将所有问题放在一个列表中，然后他们可以访问此列表中的随机元素

使用

randInt（int-min，int-max）

从中获取范围之间的随机数，您可以这样做（未测试）

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我已经有随机的问题了。。。如何更改按钮单击时的问题并在文本视图中设置您需要在单击时获得另一个随机问题（请参见编辑）您能否为我演示randInt方法供我使用请参见编辑结束和IDRuntime﹕ 致命异常：com.example.zeronesnatik.friendszone.FriendZoneQuestion.randInt上的主java.lang.NullPointerException（FriendZoneQuestion.java:224）

Details-->﹕ Does he message you asking for advice?
10-21 02:52:40.157    7878-7878/? E/Details-->﹕ Has he ever sent you multiple messages in a row?
10-21 02:52:40.157    7878-7878/? E/Details-->﹕ Has he rang you crying over a girl?
10-21 02:52:40.157    7878-7878/? E/Details-->﹕ When you see him, do his text habits for others match what he is doing with you?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Are you waiting days for a response to a text message?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Does he send you message telling you he is thinking about you or similar?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Does he comment on your Facebook but not write back to your text messages?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Does he use social media to contact you rather than phone?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Has he ever has a photo with you as his profile picture?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Has his friends started randomly adding you on Facebook or followed you on Instagram/Twitter?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Does he ask you to hold his stuff regularly?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Has he burped in front of you?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Has he farted in front of you?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Does he listen when you speak?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Do you leave your friends to go and hang out with him and his friends?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Have you been on multiple dates with her?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Did he get dressed up for the date?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Did you talk about deep things on the date?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Did you insist on paying, only for him not to let you?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Did you he drop you home?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ When you dropped her home, did he linger in the car for a long time?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Did he take a photo and post it online while you were on your date?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Do his friends talk to you?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Have you ever sent him a thoughtful gift/message and he has not said thank you/responded?
10-21 02:52:40.168    7878-7878/? E/Details-->﹕ Has he ever asked you to cook for him?

List<String> questions = new ArrayList<>();
//Add elements to the list of questions
//questions.add(...);
//questions.add(...);

if(!questions.isEmpty())
    String randomQuestion = questions.get(randInt(0,questions.size());

//Initialize list of questions
List<String> questions = new ArrayList<>();
for (int i = 1; i < jsonArray.length(); i++) {
    jo_inside = jsonArray.getJSONObject(i);
    question = jo_inside.getString("question");
    questions.add(question);
}

//On click get another random question from list
imUp.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        if(!questions.isEmpty()) {
            String randomQuestion = questions.get(randInt(0,questions.size());
            tvQuestionText.setText(randomQuestion );
        }
    }
});

/**
 * Returns a pseudo-random number between min and max, inclusive.
 * The difference between min and max can be at most
 * <code>Integer.MAX_VALUE - 1</code>.
 *
 * @param min Minimum value
 * @param max Maximum value.  Must be greater than min.
 * @return Integer between min and max, inclusive.
 * @see java.util.Random#nextInt(int)
 */
public static int randInt(int min, int max) {

    // NOTE: This will (intentionally) not run as written so that folks
    // copy-pasting have to think about how to initialize their
    // Random instance.  Initialization of the Random instance is outside
    // the main scope of the question, but some decent options are to have
    // a field that is initialized once and then re-used as needed or to
    // use ThreadLocalRandom (if using at least Java 1.7).
    Random rand;

    // nextInt is normally exclusive of the top value,
    // so add 1 to make it inclusive
    int randomNum = rand.nextInt((max - min) + 1) + min;

    return randomNum;
}