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好的,这是我的问题。我正在开发一个问答游戏,它使用一个问题计数器来显示 10 个问题,一旦发生这种情况,它就会调用 finalscore 类。我已经实现了一个计时器,它为每个问题重置,如果时间用完,它会进入下一个问题。但是,如果在最后一个问题上没有点击任何内容,即使在开始新游戏后,它也会继续循环回到 finalscore 类。

public class game extends Activity implements OnClickListener {

// int[] anArray;
int[] anArray2 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; 
int numberOfQuestionsDisplayedCounter = 0; 

int nextOrFinishValue = 0; 

int randomValueZeroToThree = 0; 
int randomValue0to29 = 0; 
boolean alreadyDisplayQuestion = false; 
boolean validQuestionNumber = false;
boolean rightButton1 = false; 
boolean rightButton2 = false; 
boolean rightButton3 = false; 
boolean rightButton4 = false;
String questionFromDatabase; 
String answer1FromDatabase; 
String answer2FromDatabase; 
String answer3FromDatabase; 
String answer4FromDatabase; 
String displayedQuestionFromDatabase = "question "; 
String displayedAnswer1FromDatabase = "answer1a ";
String displayedAnswer2FromDatabase = "answer2a "; 
String displayedAnswer3FromDatabase = "answer3a "; 
String displayedAnswer4FromDatabase = "answer4a "; 

int categoryId = 0; 
int questionId = 0; 
int currentScore = 0;
private CountDownTimer mCountDown;

public void onCreate(Bundle savedInstanceState) {
    int randomInt = 1;

    super.onCreate(savedInstanceState);
    categoryId = com.triviagame.Trivia_Game.categoryIdInMainMenu;
    // System.out.println("categoryID =" + categoryId);

    setContentView(R.layout.displayquestion);

    // gathers question and answers from database
    gatherInfoBeforePopulating(); // includes generating random number
                                    // between getting info from database 1
                                    // to 30

    // displays question, answers, score
    populateWithQuestionInfo(displayedQuestionFromDatabase,
            displayedAnswer1FromDatabase, displayedAnswer2FromDatabase,
            displayedAnswer3FromDatabase, displayedAnswer4FromDatabase,
            nextOrFinishValue);

    // Sets buttons and listers for the buttons with the 4 possible answers
    View answer1button = findViewById(R.id.answer1button);
    answer1button.setOnClickListener(this);
    View answer2button = findViewById(R.id.answer2button);
    answer2button.setOnClickListener(this);
    View answer3button = findViewById(R.id.answer3button);
    answer3button.setOnClickListener(this);
    View answer4button = findViewById(R.id.answer4button);
    answer4button.setOnClickListener(this);

    final TextView myCounter = (TextView) findViewById(R.id.tv);

    mCountDown = new CountDownTimer(21000, 1000) {

        @Override
        public void onFinish() {

            questionCheck();

            resetTimer();

        }

        @Override
        public void onTick(long millisUntilFinished) {
            myCounter.setText("Time left: "
                    + String.valueOf(millisUntilFinished / 1000));
        }
    }.start();

}

// Displays question, answers, score
public void populateWithQuestionInfo(String question, String answer1,
        String answer2, String answer3, String answer4,
        int nextQuestionOrFinish) {
    // populate the question label
    TextView questionLabel = (TextView) findViewById(R.id.question);
    questionLabel.setText(question);

    // populate answer1
    Button buttonAnswer1 = (Button) findViewById(R.id.answer1button);
    buttonAnswer1.setText(answer1);

    // populate answer2
    Button buttonAnswer2 = (Button) findViewById(R.id.answer2button);
    buttonAnswer2.setText(answer2);

    // populate answer3
    Button buttonAnswer3 = (Button) findViewById(R.id.answer3button);
    buttonAnswer3.setText(answer3);

    // populate answer4
    Button buttonAnswer4 = (Button) findViewById(R.id.answer4button);
    buttonAnswer4.setText(answer4);

    numberOfQuestionsDisplayedCounter++;

}

// Generates a random number between 0 and 3 to be used to display the
// possible answers randomly
int RandomGeneratorZeroToThree() {
    int randomInt = 0;
    Random randomGenerator = new Random();
    for (int idx = 1; idx <= 10; ++idx) {
        randomInt = randomGenerator.nextInt(4);

    }
    return randomInt;
}

// Generates a random number between 0 and 29 to be used to select the
// question to be displayed
int RandomGenerator0To29() {
    int randomInt2 = 0;
    Random randomGenerator2 = new Random();
    for (int idx2 = 1; idx2 <= 10; ++idx2) {
        randomInt2 = randomGenerator2.nextInt(30);
    }
    return randomInt2;
}

// returns true if the question has already been displayed
// returns false if the question has not been already displayed
boolean questionsAlreadyDisplayed(int randomValue0to29) {
    for (int i = 0; i < 10; i++) {
        if (anArray2[i] == randomValue0to29) {
            return true; // question already displayed
        }

    }
    anArray2[numberOfQuestionsDisplayedCounter] = randomValue0to29; // questionId
                                                                    // added
                                                                    // to
                                                                    // array
                                                                    // of
                                                                    // displayed
                                                                    // questions
    return false; // random number can be used as it has been used already
}

// Connects to the database to gather the question and 4 possible answers.
// Uses DataBaseHelper class
void getInfoFromDatabase(int categoryId, int questionId) {

    DataBaseHelper myDbHelper = new DataBaseHelper(
            this.getApplicationContext());
    myDbHelper = new DataBaseHelper(this);

    try {

        myDbHelper.createDataBase();

    } catch (IOException ioe) {

        throw new Error("Unable to create database");

    }

    try {

        myDbHelper.openDataBase();
        questionFromDatabase = myDbHelper.getQuestion(categoryId,
                questionId);

        displayedQuestionFromDatabase = questionFromDatabase;
        System.out
                .println("questionFromDatabase = " + questionFromDatabase);
        answer1FromDatabase = myDbHelper.getCorrectAnswer(categoryId,
                questionId); // correct answer from database
        System.out.println("correct answer from db = "
                + answer1FromDatabase);
        answer2FromDatabase = myDbHelper.getWrongAnswer1(categoryId,
                questionId);
        answer3FromDatabase = myDbHelper.getWrongAnswer2(categoryId,
                questionId);
        answer4FromDatabase = myDbHelper.getWrongAnswer3(categoryId,
                questionId);

        myDbHelper.close();

    } catch (SQLException sqle) {
        System.out.println("Errored out");
        try {
            throw sqle;
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}

// If the player selects the right answer this method is called to increase
// the score by 10 points
void increaseScore() {
    currentScore = currentScore + 10;
    com.triviagame.Trivia_Game.finalScore = currentScore;
}

// If the player selects the wrong answer this method is called to decrease
// the score by 10 points
void decreaseScore() {
    currentScore = currentScore - 10;
    // score can't go below 0
    if (currentScore < 0) {
        currentScore = 0;
    }
    com.triviagame.Trivia_Game.finalScore = currentScore;
}

// Displays the current scores on the activity
void displayScore() {
    TextView yourScore = (TextView) findViewById(R.id.yourscore);
    String currentScoreText;
    currentScoreText = Integer.toString(currentScore);
    yourScore.setText(currentScoreText);

}

void resetTimer() {

    if (mCountDown != null) {
        mCountDown.cancel();
    }

    final TextView myCounter = (TextView) findViewById(R.id.tv);
    mCountDown = new CountDownTimer(21000, 1000) {

        @Override
        public void onFinish() {

            questionCheck();
            resetTimer();

        }

        @Override
        public void onTick(long millisUntilFinished) {
            myCounter.setText("Time left: "
                    + String.valueOf(millisUntilFinished / 1000));
        }
    }.start();

}

void cancelTimer() {
    if (mCountDown != null) {
        mCountDown.cancel();
    }

}

void questionCheck() {
    if (nextOrFinishValue == 1) {

        Intent e = new Intent(this, finalscore.class); 
        startActivity(e);
        cancelTimer();

    }
    if (nextOrFinishValue == 0) { // If 10 questions have not been displayed
                                    // yet, display the next question
        gatherInfoBeforePopulating();
        displayScore();
        populateWithQuestionInfo(displayedQuestionFromDatabase,
                displayedAnswer1FromDatabase, displayedAnswer2FromDatabase,
                displayedAnswer3FromDatabase, displayedAnswer4FromDatabase,
                nextOrFinishValue);
    }
}

// gathers question and answers from database
void gatherInfoBeforePopulating() {

    categoryId = Trivia_Game.getCategoryIdInMainMenu();

    // Loop until a valid questionId that hasn't been used is obtained
    while (validQuestionNumber == false) {
        randomValue0to29 = RandomGenerator0To29();
        System.out.println("random30 in onClick = " + randomValue0to29);

        alreadyDisplayQuestion = questionsAlreadyDisplayed(randomValue0to29);
        if (alreadyDisplayQuestion == true) {
            System.out
                    .println("question number already displayed looking for a non displayed question");
        }
        if (alreadyDisplayQuestion == false) {
            System.out.println("question not displayed yet");
            validQuestionNumber = true;
        }
    }

    validQuestionNumber = false;
    alreadyDisplayQuestion = false;
    questionId = randomValue0to29; // sets the valid random generated number
                                    // to the questionID

    // connect to database to gather the question and answers
    getInfoFromDatabase(categoryId, questionId);

    // Calls random number from 0 to 3 to determine which button will
    // display the correct answer
    randomValueZeroToThree = RandomGeneratorZeroToThree();
    System.out.println("random4 in onClick = " + randomValueZeroToThree);

    // Sets the order according to the button that is to display the correct
    // answer
    switch (randomValueZeroToThree) {
    case 0:
        displayedAnswer1FromDatabase = answer1FromDatabase; // correct
                                                            // answer
        displayedAnswer2FromDatabase = answer2FromDatabase;
        displayedAnswer3FromDatabase = answer3FromDatabase;
        displayedAnswer4FromDatabase = answer4FromDatabase;
        rightButton1 = true;
        rightButton2 = false;
        rightButton3 = false;
        rightButton4 = false;
        break;

    case 1:
        displayedAnswer2FromDatabase = answer1FromDatabase; // correct
                                                            // answer
        displayedAnswer1FromDatabase = answer2FromDatabase;
        displayedAnswer3FromDatabase = answer3FromDatabase;
        displayedAnswer4FromDatabase = answer4FromDatabase;
        rightButton1 = false;
        rightButton2 = true;
        rightButton3 = false;
        rightButton4 = false;
        break;

    case 2:
        displayedAnswer3FromDatabase = answer1FromDatabase; // correct
                                                            // answer
        displayedAnswer1FromDatabase = answer2FromDatabase;
        displayedAnswer2FromDatabase = answer3FromDatabase;
        displayedAnswer4FromDatabase = answer4FromDatabase;
        rightButton1 = false;
        rightButton2 = false;
        rightButton3 = true;
        rightButton4 = false;
        break;

    case 3:
        displayedAnswer4FromDatabase = answer1FromDatabase; // correct
                                                            // answer
        displayedAnswer1FromDatabase = answer2FromDatabase;
        displayedAnswer3FromDatabase = answer3FromDatabase;
        displayedAnswer2FromDatabase = answer4FromDatabase;
        rightButton1 = false;
        rightButton2 = false;
        rightButton3 = false;
        rightButton4 = true;
        break;

    default:
        displayedAnswer1FromDatabase = answer4FromDatabase; // no correct
                                                            // answer
        displayedAnswer2FromDatabase = answer2FromDatabase;
        displayedAnswer3FromDatabase = answer3FromDatabase;
        displayedAnswer4FromDatabase = answer1FromDatabase;
        rightButton1 = false;
        rightButton2 = false;
        rightButton3 = false;
        rightButton4 = false;

    }

    // After the 9th question is displayed, the nextOfFinishValue should be
    // set to 1 so the button displayes Finish instead of Next
    if (numberOfQuestionsDisplayedCounter < 9) {
        nextOrFinishValue = 0;

    } else {
        nextOrFinishValue = 1;
    }

}

// Listeners for the 4 buttons with answers and the Next or Finish buttons
public void onClick(View v) {
    switch (v.getId()) {

    case R.id.answer1button:
        if (rightButton1 == true) {
            increaseScore();
            resetTimer();

            // put here to change color of button

        } else {
            decreaseScore();
            resetTimer();
            // change button to red

        }
        questionCheck();

        break;

    case R.id.answer2button:
        if (rightButton2 == true) {
            increaseScore();
            resetTimer();
        } else {
            decreaseScore();
            resetTimer();
        }
        questionCheck();

        break;

    case R.id.answer3button:
        if (rightButton3 == true) {
            increaseScore();
            resetTimer();
        } else {
            decreaseScore();
            resetTimer();
        }
        questionCheck();
        break;

    case R.id.answer4button:
        if (rightButton4 == true) {
            increaseScore();
            resetTimer();
        } else {
            decreaseScore();
            resetTimer();
        }
        questionCheck();
        break;

    }

}

@Override
protected void onResume() {
    super.onResume();
    music.play(this, R.raw.musicbackground); // play background music
}

@Override
protected void onPause() {
    super.onPause();
    music.stop(this); // stop playing background music

}

}

4

1 回答 1

5

mCountdown 永远不会为空,因此请更改您的代码

void cancelTimer() {
if (mCountDown != null) {
    mCountDown.cancel();
}

}

void cancelTimer() {
mCountDown.cancel();
}
于 2013-03-09T02:56:33.010 回答