wie diese Frage zu randomisieren?

Question

Ich mache ein Multiple-Choice-Quiz-Spiel, aber ich brauche die 20 Frage dieser Tabelle randomisiert jedes Mal, wenn ich wieder spielen spielte, sollte eine neue Frage auftauchen. welcher Code sollte ich

 public class TriviaQuizHelper extends SQLiteOpenHelper { 

    Context context; 
    private static final String DATABASE_NAME = "DATABASEQUIZ"; 
    private static final int DATABASE_VERSION = 17; 
    private static final String TABLE_NAME = "TRIVIAQUIZ"; 
    private static final String UID = "_UID"; 
    private static final String QUESTION = "QUESTION"; 
    private static final String OPTA = "OPTA"; 
    private static final String OPTB = "OPTB"; 
    private static final String OPTC = "OPTC"; 
    private static final String OPTD = "OPTD"; 
    private static final String ANSWER = "ANSWER"; 
    private static final String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " (" + UID + " INTEGER PRIMARY KEY AUTOINCREMENT , " + QUESTION + " VARCHAR(255), " + OPTA + " VARCHAR(255), " + OPTB + " VARCHAR(255), " + OPTC + " VARCHAR(255), " + OPTD + " VARCHAR(255), " + ANSWER + " VARCHAR(255));"; 
    private static final String DROP_TABLE = "DROP TABLE IF EXISTS " + TABLE_NAME; 

    public TriviaQuizHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     this.context = context; 
    } 

    @Override 
    public void onCreate(SQLiteDatabase sqLiteDatabase) { 
     sqLiteDatabase.execSQL(CREATE_TABLE); 

    } 

    @Override 
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) { 
     sqLiteDatabase.execSQL(DROP_TABLE); 
     onCreate(sqLiteDatabase); 

    } 

    public void allQuestion() { 
     TriviaQuestion q1 = new TriviaQuestion("Galileo was an Italian astronomer who developed?", "Telescope", "Airoplane", "Electricity", "Train", "Telescope"); 
     this.insert(q1); 
     TriviaQuestion q2 = new TriviaQuestion("Who is the father of Geometry ?", "Aristotle", "Euclid", "Pythagoras", "Kepler", "Euclid"); 
     this.insert(q2); 
     TriviaQuestion q3 = new TriviaQuestion("Who was known as Iron man of India ?", "Govind Ballabh Pant", "Jawaharlal Nehru", "Subhash Chandra Bose", "Sardar Vallabhbhai Patel", "Sardar Vallabhbhai Patel"); 
     this.insert(q3); 
     TriviaQuestion q4 = new TriviaQuestion("The first woman in space was ?", "Valentina Tereshkova", "Sally Ride", "Naidia Comenci", "Tamara Press", "Valentina Tereshkova"); 
     this.insert(q4); 
     TriviaQuestion q5 = new TriviaQuestion("Who is the Flying Sikh of India ?", "Mohinder Singh", "Joginder Singh", "Ajit Pal Singh", "Milkha singh", "Milkha singh"); 
     this.insert(q5); 
     TriviaQuestion q6 = new TriviaQuestion("The Indian to beat the computers in mathematical wizardry is", "Ramanujam", "Rina Panigrahi", "Raja Ramanna", "Shakunthala Devi", "Shakunthala Devi"); 
     this.insert(q6); 
     TriviaQuestion q7 = new TriviaQuestion("Who is Larry Pressler ?", "Politician", "Painter", "Actor", "Tennis player", "Politician"); 
     this.insert(q7); 
     TriviaQuestion q8 = new TriviaQuestion("Michael Jackson is a distinguished person in the field of ?", "Pop Music", "Jounalism", "Sports", "Acting", "Pop Music"); 
     this.insert(q8); 
     TriviaQuestion q9 = new TriviaQuestion("The first Indian to swim across English channel was ?", "V. Merchant", "P. K. Banerji", "Mihir Sen", "Arati Saha", "Mihir Sen"); 
     this.insert(q9); 
     TriviaQuestion q10 = new TriviaQuestion("Who was the first Indian to make a movie?", "Dhundiraj Govind Phalke", " Asha Bhonsle", " Ardeshir Irani", "V. Shantaram", "Dhundiraj Govind Phalke"); 
     this.insert(q10); 
     TriviaQuestion q11 = new TriviaQuestion("Who is known as the ' Saint of the gutters ?", "B.R.Ambedkar", "Mother Teresa", "Mahatma Gandhi", "Baba Amte", "Mother Teresa"); 
     this.insert(q11); 
     TriviaQuestion q12 = new TriviaQuestion("Who invented the famous formula E=mc^2", "Albert Einstein", "Galilio", "Sarvesh", "Bill Gates", "Albert Einstein"); 
     this.insert(q12); 
     TriviaQuestion q13 = new TriviaQuestion("Who is elected as president of us 2016", "Donald Trump", "Hilary Clinton", "Jhon pol", "Barack Obama", "Donald Trump"); 
     this.insert(q13); 
     TriviaQuestion q14 = new TriviaQuestion("Who was the founder of company Microsoft", "Bill Gates", "Bill Clinton", "Jhon rio", "Steve jobs", "Bill Gates"); 
     this.insert(q14); 
     TriviaQuestion q15 = new TriviaQuestion("Who was the founder of company Apple ?", "Steve Jobs", "Steve Washinton", "Bill Gates", "Jobs Wills", "Steve Jobs"); 
     this.insert(q15); 
     TriviaQuestion q16 = new TriviaQuestion("Who was the founder of company Google ?", "Steve Jobs", "Bill Gates", "Larry Page", "Sundar Pichai", "Larry Page"); 
     this.insert(q16); 
     TriviaQuestion q17 = new TriviaQuestion("Who is know as god of cricket ?", "Sachin Tendulkar", "Kapil Dev", "Virat Koli", "Dhoni", "Sachin Tendulkar"); 
     this.insert(q17); 
     TriviaQuestion q18 = new TriviaQuestion("who has won ballon d'or of 2015 ?", "Lionel Messi", "Cristiano Ronaldo", "Neymar", "Kaka", "Lionel Messi"); 
     this.insert(q18); 
     TriviaQuestion q19 = new TriviaQuestion("who has won ballon d'or of 2014 ?", "Neymar", "Lionel Messi", "Cristiano Ronaldo", "Kaka", "Cristiano Ronaldo"); 
     this.insert(q19); 
     TriviaQuestion q20 = new TriviaQuestion("the Founder of the most famous gaming platform steam is ?", "Bill Cliton", "Bill Williams", "Gabe Newell", "Bill Gates", "Gabe Newell"); 
     this.insert(q20); 
    } 
    public void insert(TriviaQuestion triviaQuestion) { 
     ContentValues contentvalues = new ContentValues(); 
     /* contentvalues.put(UID,triviaQuestion.getId());*/ 
     contentvalues.put(QUESTION, triviaQuestion.getQuestion()); 
     contentvalues.put(OPTA, triviaQuestion.getOpta()); 
     contentvalues.put(OPTB, triviaQuestion.getOptb()); 
     contentvalues.put(OPTC, triviaQuestion.getOptc()); 
     contentvalues.put(OPTD, triviaQuestion.getOptd()); 
     contentvalues.put(ANSWER, triviaQuestion.getAnswer()); 
     SQLiteDatabase db = this.getWritableDatabase(); 
     db.insert(TABLE_NAME, null, contentvalues); 
    } 
    public List<TriviaQuestion> getAllQuestion() { 
     List<TriviaQuestion> que = new ArrayList<>(); 
     SQLiteDatabase db = this.getWritableDatabase(); 
     String coloumns[] = {UID, QUESTION, OPTA, OPTB, OPTC, OPTD, ANSWER}; 
     Cursor cursor = db.query(TABLE_NAME, coloumns, null, null, null, null, null); 
     while (cursor.moveToNext()) { 
      TriviaQuestion triviaQuestion = new TriviaQuestion(); 
      triviaQuestion.setId(cursor.getInt(0)); 
      triviaQuestion.setQuestion(cursor.getString(1)); 
      triviaQuestion.setOpta(cursor.getString(2)); 
      triviaQuestion.setOptb(cursor.getString(3)); 
      triviaQuestion.setOptc(cursor.getString(4)); 
      triviaQuestion.setOptd(cursor.getString(5)); 
      triviaQuestion.setAnswer(cursor.getString(6)); 
      que.add(triviaQuestion); 
     } 
     return que; 
    } 
} 

verwenden das ist meine andere Tätigkeit, um den obigen Code

public class TriviaQuestion extends Activity { 
    private int id; 
    private String question; 
    private String opta; 
    private String optb; 
    private String optc; 
    private String optd; 
    private String answer; 

    public TriviaQuestion(String q, String oa, String ob, String oc, String od, String ans) { 

     question = q; 
     opta = oa; 
     optb = ob; 
     optc = oc; 
     optd = od; 
     answer = ans; 
    } 

    public TriviaQuestion() { 
     id = 0; 
     question = ""; 
     opta = ""; 
     optb = ""; 
     optc = ""; 
     optd = ""; 
     answer = ""; 
    } 

    /* public int getId() { 
     return id; 
    }*/ 

    public String getQuestion() { 
     return question; 
    } 

    public String getOpta() { 
     return opta; 
    } 

    public String getOptb() { 
     return optb; 
    } 

    public String getOptc() { 
     return optc; 
    } 

    public String getOptd() { 
     return optd; 
    } 

    public String getAnswer() { 
     return answer; 
    } 

    public void setId(int i) { 
     id = i; 
    } 

    public void setQuestion(String q1) { 
     question = q1; 
    } 

    public void setOpta(String o1) { 
     opta = o1; 
    } 

    public void setOptb(String o2) { 
     optb = o2; 
    } 

    public void setOptc(String o3) { 
     optc = o3; 
    } 

    public void setOptd(String o4) { 
     optd = o4; 
    } 

    public void setAnswer(String ans) { 
     answer = ans; 
    } 


} 

Answer 1

Dies funktioniert durch einfaches Mischen der TiviaQuestion Arraylist durchgeführt werden.

Hier ist ein Beispiel unter Verwendung von String statt TriviaQuestion

List<String> questions = new ArrayList<>(); 
questions.add("This is a question!"); 
questions.add("This is another question!"); 
questions.add("This is a third question!"); 

Collections.shuffle(questions); 

System.out.println(questions); 

Ausgabe

[This is another question!, This is a question!, This is a third question!] 

Answer 2

In getAllQuestion() können Sie die Liste que mischen kann es vor der Rückkehr sie randomisieren.

Collections.shuffle(que);