查看正确答案 [英] Check the correct answer

问题描述

我开发一个应用程序，是一个问题的比赛。我设法每次回答每个问题，以显示一个不同的按钮，但我无法检查正确的答案。我的做法是：我创建了一个额外的列到数据库，在那里我指明了正确的答案是列（1,2,3或4）。我用这个code为显示在不同的按钮的答案。

I am developing an app that is a question's game. I managed to show the answers to each question to a different button each time but i am having trouble to check the right answer. My approach is: I created an extra column to the database where i indicate the column where the right answer is(1,2,3 or 4). I use this code for showing the answers in different buttons.

cur = dbHelper.getRandomQuestion();
    String corrans = cur.getString(cur.getColumnIndex("CorrectAnswer"));
    a = Integer.parseInt(corrans);
    String question = cur.getString(cur.getColumnIndex("QUESTIONS"));
    String answer0 = cur.getString(cur.getColumnIndex("ANSWER1"));
    String answer1 = cur.getString(cur.getColumnIndex("ANSWER2"));
    String answer2 = cur.getString(cur.getColumnIndex("ANSWER3"));
    String answer3 = cur.getString(cur.getColumnIndex("ANSWER4"));
    txtQuest.setText(question);

    ArrayList<String> lstAnswers = new ArrayList<String>();
    lstAnswers.add(answer0);
    lstAnswers.add(answer1);
    lstAnswers.add(answer2);
    lstAnswers.add(answer3);

     score.setText("Your score is " + b +","+ a);

    Random random = new Random();

    int[] textViews = new int[] { R.id.button1, R.id.button2, R.id.button3, R.id.button4 };
    int textViewIndex = 0;

    while (lstAnswers.size() > 0)   {
    int index = random.nextInt(lstAnswers.size());
    if(a == index){ b = index;}
    else{}
    String randomAnswer = lstAnswers.remove(index);
    ((TextView)findViewById(textViews[textViewIndex])).setText(randomAnswer);
    ++textViewIndex;
                                    }

要每个按钮调用比较a和b的值，然后采取相应的行动。但它似乎没有工作。我明白为什么，但我不能弄明白。任何帮助appeciated。

To each button call to compare the values of a and b and then act accordingly. But it doesnt seem to work. I understand why but i cannot figure it out. Any help appeciated.

推荐答案

使用 Col​​lections.shuffle（名单）洗牌你的答案数组，然后显示答案
   设置一个标记为权利的按钮，其前面回答是正确的，后来比较了tagvalue和DISPLY对错

use Collections.shuffle(list) to shuffle your answer array and then display the answer Set a tag as "right" to your button where anwer is correct and later compare the the tagvalue and disply right or wrong

编辑：下面的事情只是一个大纲

below thing is just an outline

 Here im displaying answers in buttons....

    List<Integer> intList = new ArrayList<Integer>(Arrays.asList(0,1,2,3));
        Collections.shuffle(intList);

       Log.d("ERR","List after shuffling: " + intList);  
       // below answers will be assiagned randomly to buttons...
        btn_cmpTagline[intList.get(0)].setText(answr1);
        btn_cmpTagline[intList.get(0)].setTag("right");
        btn_cmpTagline[intList.get(1)].setText(answr2);
        btn_cmpTagline[intList.get(1)].setTag("wrong");
        btn_cmpTagline[intList.get(2)].setText(answr3);
        btn_cmpTagline[intList.get(2)].setTag("wrong");
        btn_cmpTagline[intList.get(3)].setText(answr4);
        btn_cmpTagline[intList.get(3)].setTag("wrong");

//在点击

   @Override
    public void onClick(View v) {
        switch(v.getId()){
        case R.id.btn_tag1:
            Log.d("ERR", v.getTag().toString());
            if(v.getTag().toString().equalsIgnoreCase("right")){
                //this button has right answer .. do anything 
            }

            break;
        case R.id.btn_tag2:
            Log.d("ERR", v.getTag().toString());
            if(v.getTag().toString().equalsIgnoreCase("right")){
                //this button has right answer .. do anything 
            }

            break;
        case R.id.btn_tag3:
            Log.d("ERR", v.getTag().toString());
            if(v.getTag().toString().equalsIgnoreCase("right")){
                //this button has right answer .. do anything 
            }

                    --
                    --
      }

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