如何在Android的

Question

我試圖建立與問題和答案像這樣的測試程序顯示在不同的無線Grpups使用SQLite動態單選按鈕：

問題1：
單選按鈕 - 正確答案爲針對問題1
收音機按鈕 - ANSWER2的問題1
單選按鈕 - ANSWER3的問題1
單選按鈕 - Answer4的問題1
問題2：
單選按鈕 - 正確答案爲問題2爲
鐳DIO按鈕 - ANSWER2對於問題2
單選按鈕 - ANSWER3對於問題2
單選按鈕 - Answer4對於問題2

等。問題是，當我試圖循環通過數據庫結果，結果顯示如下：

問題1：
單選按鈕 - 正確答案爲針對問題1
單選按鈕 - ANSWER2的問題1
單選按鈕 - ANSWER3針對問題1
單選按鈕 - Answer4的問題1
單選按鈕 - 正確答案爲問題2爲
單選按鈕 - ANSWER2對於問題2
單選按鈕 - ANSWER3對於問題2
單選按鈕 - Answer4對於問題2
問題2：
單選按鈕 - 正確答案爲針對問題1
單選按鈕 - ANSWER2的問題1
單選按鈕 - ANSWER3的問題1
單選按鈕 - Answer4的問題1
單選按鈕 - 正確答案爲對於問題2
收音機按鈕 - ANSWER2對於問題2
單選按鈕 - ANSWER3對於問題2
單選按鈕 - Answer4對於問題2

如何僅顯示每個問題的4個單選按鈕（4個答案）？這是我的MainActivity.java：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    DBHandler db = new DBHandler(this); 

    // Inserting Questions 
    db.addQuestion(new Question("Question1?", 1)); 
    db.addQuestion(new Question("Question2?", 2)); 
    db.addQuestion(new Question("Question3?", 3)); 
    db.addQuestion(new Question("Question4?", 4)); 

    // Inserting Answers/Correct Answer (1 for true, 0 for false) 
    db.addAnswer(new Answer("Answer1 for Question1", 1, 0)); 
    db.addAnswer(new Answer("Answer2 for Question1", 1, 0)); 
    db.addAnswer(new Answer("Answer3 for Question1", 1, 1)); 
    db.addAnswer(new Answer("Answer4 for Question1", 1, 0)); 

    db.addAnswer(new Answer("Answer1 for Question2", 2, 0)); 
    db.addAnswer(new Answer("Answer2 for Question2", 2, 0)); 
    db.addAnswer(new Answer("Answer3 for Question2", 2, 1)); 
    db.addAnswer(new Answer("Answer4 for Question2", 2, 0)); 

    // Reading all Questions 
    List<Question> questions = db.getAllQuestions(); 
    // Reading all Answers 
    List<Answer> answers = db.getAllAnswers(); 

    LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linearLayout); 

    for (Question qn : questions) { 
     String question_log = " Question: " + qn.getQuestion(); 
     //Create Question Text 
     TextView question = new TextView(this); 
     question.setText(question_log); 
     question.setTextColor(Color.BLUE); 
     linearLayout.addView(question); 
     //Create Radio Button Answers 
     final RadioButton[] radioButton = new RadioButton[4]; 
     RadioGroup radioGroup = new RadioGroup(this); 
     radioGroup.setOrientation(RadioGroup.VERTICAL); 
     for (int i = 0; i < 1; i++) { 
      for (Answer an : answers) { 
       String answers_log = " " + an.getAnswer(); 
       radioButton[i] = new RadioButton(this); 
       radioGroup.addView(radioButton[i]); 
       radioButton[i].setText(answers_log); 
      } 
     } 
     linearLayout.addView(radioGroup); 
    } 
} 

這我DBHandler：

private static final int DATABASE_VERSION = 1; 
private static final String DATABASE_NAME = "iqTest"; 

private static final String TABLE_QUESTIONS = "questions"; 
// Question Table Columns Names 
private static final String KEY_QUESTION_ID = "question_id"; 
private static final String KEY_QUESTION = "question"; 
private static final String KEY_ORDER_NO = "order_no"; 

private static final String TABLE_ANSWERS = "answers"; 
// Answer Table Columns Names 
private static final String KEY_ANSWER_ID = "answer_id"; 
private static final String KEY_ANSWER = "answer"; 
private static final String KEY_QUESTION_ID_ANSWER = "question_id_answer"; 
private static final String KEY_CORRECT_ANSWER = "correct_answer"; 


<pre>public DBHandler(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 

// Creating Tables 
@Override 
public void onCreate(SQLiteDatabase db) { 
    String CREATE_QUESTIONS_TABLE = "CREATE TABLE " + TABLE_QUESTIONS + "(" 
      + KEY_QUESTION_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUESTION + " TEXT, " 
      + KEY_ORDER_NO + " INTEGER " + ")"; 

    String CREATE_ANSWERS_TABLE = "CREATE TABLE " + TABLE_ANSWERS + "(" 
      + KEY_ANSWER_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_ANSWER + " TEXT, " 
      + KEY_QUESTION_ID_ANSWER + " INTEGER, " + KEY_CORRECT_ANSWER + " INTEGER " + ")"; 

    db.execSQL(CREATE_QUESTIONS_TABLE); 
    db.execSQL(CREATE_ANSWERS_TABLE); 
} 

// Upgrading Database 
@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUESTIONS); 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_ANSWERS); 
    onCreate(db); 
} 

// Adding New Question 
void addQuestion(Question question) { 
    SQLiteDatabase db = this.getWritableDatabase(); 

    ContentValues values = new ContentValues(); 
    values.put(KEY_QUESTION, question.getQuestion()); 
    values.put(KEY_ORDER_NO, question.getorderNo()); 

    db.insert(TABLE_QUESTIONS, null, values); 
    db.close(); 
} 

// Getting All Questions 
public List<Question> getAllQuestions() { 
    List<Question> questionList = new ArrayList<Question>(); 
    String selectQuery = "SELECT * FROM " + TABLE_QUESTIONS; 

    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 

    // Looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      Question question = new Question(); 
      question.setID(Integer.parseInt(cursor.getString(0))); 
      question.setQuestion(cursor.getString(1)); 
      question.setorderNo(Integer.parseInt(cursor.getString(2))); 
      // Adding Questions to List 
      questionList.add(question); 
     } while (cursor.moveToNext()); 
    } 
    return questionList; 
} 

// Adding New Answer 
void addAnswer(Answer answer) { 
    SQLiteDatabase db = this.getWritableDatabase(); 

    ContentValues values = new ContentValues(); 
    values.put(KEY_ANSWER, answer.getAnswer()); 
    values.put(KEY_QUESTION_ID_ANSWER, answer.getQuestion_id_answer()); 
    values.put(KEY_CORRECT_ANSWER, answer.getCorrect_answer()); 

    db.insert(TABLE_ANSWERS, null, values); 
    db.close(); 
} 

// Getting All Answers 
public List<Answer> getAllAnswers() { 
    List<Answer> answerList = new ArrayList<Answer>(); 
    String selectQuery = "SELECT * FROM " + TABLE_ANSWERS; 

    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 

    // Looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      Answer answer = new Answer(); 
      answer.setAnswer_id(Integer.parseInt(cursor.getString(0))); 
      answer.setAnswer(cursor.getString(1)); 
      answer.setQuestion_id_answer(Integer.parseInt(cursor.getString(2))); 
      answer.setCorrect_answer(Integer.parseInt(cursor.getString(3))); 
      // Adding Questions to List 
      answerList.add(answer); 
     } while (cursor.moveToNext()); 
    } 
    return answerList; 
} 

謝謝！

Answer 1

你的錯誤是在這裏

for (Answer an : answers) 

您應該過濾answers第一隻包含答案了當前qn

我會編輯這樣你的代碼的一部分：

//Create Radio Button Answers 
RadioGroup radioGroup = new RadioGroup(this); 
radioGroup.setOrientation(RadioGroup.VERTICAL); 

for (Answer an : answers) { 
    if (an.Question == qn) { 
     String answers_log = " " + an.getAnswer(); 
     RadioButton radioButton = new RadioButton(this); 
     radioButton.setText(answers_log); 
     radioGroup.addView(radioButton); 
    } 
}