java - 如何解决这些 logcat 错误？

Question

在我的问答游戏中，我将轮数设置为 15。无论答案是错误还是正确，游戏都不会终止。正确答案的分数递增，否则分数递减。我的测验游戏运行正常，但我在其中添加了计时器，这样当下一个问题出现时，分数就会递减。并且在计时器的finish()方法中添加计时器和递减方法之后。我的游戏只运行了 8 或 9 轮就终止了。并且分数也减少了 150。但是在我的 decrementScore() 方法中，我仅设置了减少 50。如果不在计时器的完成方法中添加此方法，则其工作正常。我的代码和日志猫如下:-提前致谢!

代码:-

public class QuestionActivity extends Activity implements OnClickListener{

    private Question currentQ;
    private GamePlay currentGame;

     @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.question);
            processScreen();
    }

   private void processScreen()
   {
                /**
         * Configure current game and get question
         */
        currentGame = ((CYKApplication)getApplication()).getCurrentGame();
        currentQ = currentGame.getNextQuestion();
        Button nextBtn1 = (Button) findViewById(R.id.answer1);
        nextBtn1.setOnClickListener(this);
        Button nextBtn2 = (Button) findViewById(R.id.answer2);
        nextBtn2.setOnClickListener(this);
        Button nextBtn3 = (Button) findViewById(R.id.answer3);
        nextBtn3.setOnClickListener(this);
        Button nextBtn4 = (Button) findViewById(R.id.answer4);
        nextBtn4.setOnClickListener(this);
        Button nextBtn5 = (Button) findViewById(R.id.answer5);
        nextBtn5.setOnClickListener(this);
        /**
         * Update the question and answer options..
         */
        setQuestions();

    }


    /**
     * Method to set the text for the question and answers from the current games
     * current question
     */
    private void setQuestions() {
        //set the question text from current question
        String question = Utility.capitalise(currentQ.getQuestion());
        TextView qText = (TextView) findViewById(R.id.question);
        qText.setText(question);

        //set the available options
        List<String> answers = currentQ.getQuestionOptions();
        TextView option1 = (TextView) findViewById(R.id.answer1);
        option1.setText(Utility.capitalise(answers.get(0)));

        TextView option2 = (TextView) findViewById(R.id.answer2);
        option2.setText(Utility.capitalise(answers.get(1)));

        TextView option3 = (TextView) findViewById(R.id.answer3);
        option3.setText(Utility.capitalise(answers.get(2)));

        TextView option4 = (TextView) findViewById(R.id.answer4);
        option4.setText(Utility.capitalise(answers.get(3)));

        int score = currentGame.getScore();
        String scr = String.valueOf(score);
        TextView score1 = (TextView) findViewById(R.id.score);
        score1.setText(scr);

        new CountDownTimer(10000, 1000) {

            public void onTick(long millisUntilFinished) {
                TextView timers = (TextView) findViewById(R.id.timers);
                timers.setText("Time: " + millisUntilFinished / 1000);
            }

            public void onFinish() { 
                currentGame.decrementScore();
                     processScreen();
                                   }
         }.start();
        }


    @Override
    public void onClick(View arg0) {
        //Log.d("Questions", "Moving to next question");
        if(arg0.getId()==R.id.answer5)
        {
        new AlertDialog.Builder(this)
        .setMessage("Are you sure?")
        .setCancelable(true)
        .setPositiveButton("Yes",
         new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,
         int id) {
                finish();
                 }
             }).setNegativeButton("No", null).show();

                }

        else
        {
            if(!checkAnswer(arg0)) return;  

        /**
         * check if end of game
         */
        if (currentGame.isGameOver()){
            //Log.d("Questions", "End of game! lets add up the scores..");
            //Log.d("Questions", "Questions Correct: " + currentGame.getRight());
            //Log.d("Questions", "Questions Wrong: " + currentGame.getWrong());
            Intent i = new Intent(this, EndgameActivity.class);
            startActivity(i);
            finish();
        }
        else{
            Intent i = new Intent(this, QuestionActivity.class);
                        finish();
                        startActivity(i);
        }
        }
      }



    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        switch (keyCode)
        {
        case KeyEvent.KEYCODE_BACK :
            return true;
        }

        return super.onKeyDown(keyCode, event);
    }


    /**
     * Check if a checkbox has been selected, and if it
     * has then check if its correct and update gamescore
     */
    private boolean checkAnswer(View v) {

        Button b=(Button) v;
        String answer = b.getText().toString();

            //Log.d("Questions", "Valid Checkbox selection made - check if correct");
            if (currentQ.getAnswer().equalsIgnoreCase(answer))
            {
                b.setBackgroundResource(R.drawable.answercolor);
                //Log.d("Questions", "Correct Answer!");
                currentGame.incrementScore();
            }
            else{
                b.setBackgroundResource(R.drawable.answercolorr);
                //Log.d("Questions", "Incorrect Answer!");
                currentGame.decrementScore();
            }
            return true;
        }

}

分数递减和舍入增量日志猫在 getNextQuestion() 方法中显示一些错误的类。

public class GamePlay {

    private int numRounds;
    private int difficulty;
    private String playerName;
    private int score;
    private int round;

    private List<Question> questions = new ArrayList<Question>();
    /**
     * @return the right
     */
    public int getScore() {
        return score;
    }
    /**
     * @param right the right to set
     */
    public void setScore(int score) {
        this.score = score;
    }

    /**
     * @return the round
     */
    public int getRound() {
        return round;
    }
    /**
     * @param round the round to set
     */
    public void setRound(int round) {
        this.round = round;
    }
    /**
     * @param difficulty the difficulty to set
     */
    public void setDifficulty(int difficulty) {
        this.difficulty = difficulty;
    }
    /**
     * @return the difficulty
     */
    public int getDifficulty() {
        return difficulty;
    }
    /**
     * @param questions the questions to set
     */
    public void setQuestions(List<Question> questions) {
        this.questions = questions;
    }

    /**
     * @param q the question to add
     */
    public void addQuestions(Question q) {
        this.questions.add(q);
    }

    /**
     * @return the questions
     */
    public List<Question> getQuestions() {
        return questions;
    }


    public Question getNextQuestion(){

        //get the question
        Question next = questions.get(this.getRound());
        //update the round number to the next round
        this.setRound(this.getRound()+1);
        return next;
    }

    /**
     * method to increment the number of correct answers this game
     */


    /**
     * method to increment the number of incorrect answers this game
     */
    public void incrementScore(){
        score=score+100;
    }

    public void decrementScore()
    {
        score=score-50;
    }
    /**
     * @param numRounds the numRounds to set
     */
    public void setNumRounds(int numRounds) {
        this.numRounds = numRounds;
    }
    /**
     * @return the numRounds
     */
    public int getNumRounds() {
        return numRounds;
    }

    /**
     * method that checks if the game is over
     * @return boolean
     */
    public boolean isGameOver(){
        return (getRound() >= getNumRounds());
    }


}

日志猫:-

09-06 15:29:23.321: D/dalvikvm(3372): Debugger has detached; object registry had 1 entries
09-06 15:30:00.081: D/gralloc_goldfish(3942): Emulator without GPU emulation detected.
09-06 15:30:05.321: D/dalvikvm(3942): GC_FOR_ALLOC freed 39K, 7% free 2661K/2844K, paused 86ms, total 97ms
09-06 15:30:05.371: I/dalvikvm-heap(3942): Grow heap (frag case) to 4.795MB for 2160016-byte allocation
09-06 15:30:05.421: D/dalvikvm(3942): GC_FOR_ALLOC freed 1K, 4% free 4768K/4956K, paused 56ms, total 56ms
09-06 15:30:05.541: D/dalvikvm(3942): GC_CONCURRENT freed 1K, 4% free 4767K/4956K, paused 8ms+35ms, total 118ms
09-06 15:30:09.050: D/dalvikvm(3942): GC_FOR_ALLOC freed 16K, 3% free 5226K/5388K, paused 60ms, total 72ms
09-06 15:30:09.080: I/dalvikvm-heap(3942): Grow heap (frag case) to 7.300MB for 2160016-byte allocation
09-06 15:30:09.190: D/dalvikvm(3942): GC_CONCURRENT freed 242K, 6% free 7093K/7500K, paused 4ms+4ms, total 105ms
09-06 15:30:10.140: I/Choreographer(3942): Skipped 768 frames!  The application may be doing too much work on its main thread.
09-06 15:30:12.360: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:13.364: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:16.191: I/Choreographer(3942): Skipped 53 frames!  The application may be doing too much work on its main thread.
09-06 15:30:17.191: I/Choreographer(3942): Skipped 46 frames!  The application may be doing too much work on its main thread.
09-06 15:30:20.225: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:21.251: I/Choreographer(3942): Skipped 45 frames!  The application may be doing too much work on its main thread.
09-06 15:30:22.951: I/Choreographer(3942): Skipped 62 frames!  The application may be doing too much work on its main thread.
09-06 15:30:23.934: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:26.042: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:27.050: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:28.821: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:31.370: I/Choreographer(3942): Skipped 30 frames!  The application may be doing too much work on its main thread.
09-06 15:30:31.830: I/Choreographer(3942): Skipped 48 frames!  The application may be doing too much work on its main thread.
09-06 15:30:32.447: I/Choreographer(3942): Skipped 45 frames!  The application may be doing too much work on its main thread.
09-06 15:30:33.474: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:34.501: I/Choreographer(3942): Skipped 51 frames!  The application may be doing too much work on its main thread.
09-06 15:30:35.981: I/Choreographer(3942): Skipped 50 frames!  The application may be doing too much work on its main thread.
09-06 15:30:36.991: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:38.008: I/Choreographer(3942): Skipped 45 frames!  The application may be doing too much work on its main thread.
09-06 15:30:40.082: I/Choreographer(3942): Skipped 43 frames!  The application may be doing too much work on its main thread.
09-06 15:30:40.181: D/AndroidRuntime(3942): Shutting down VM
09-06 15:30:40.181: W/dalvikvm(3942): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
09-06 15:30:40.191: E/AndroidRuntime(3942): FATAL EXCEPTION: main
09-06 15:30:40.191: E/AndroidRuntime(3942): java.lang.IndexOutOfBoundsException: Invalid index 15, size is 15
09-06 15:30:40.191: E/AndroidRuntime(3942):     at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at java.util.ArrayList.get(ArrayList.java:304)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at com.abc.cyk.quiz.GamePlay.getNextQuestion(GamePlay.java:100)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at com.abc.cyk.QuestionActivity.processScreen(QuestionActivity.java:42)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at com.abc.cyk.QuestionActivity.access$0(QuestionActivity.java:36)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at com.abc.cyk.QuestionActivity$1.onFinish(QuestionActivity.java:98)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:118)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at android.os.Looper.loop(Looper.java:137)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at android.app.ActivityThread.main(ActivityThread.java:5041)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at java.lang.reflect.Method.invokeNative(Native Method)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at java.lang.reflect.Method.invoke(Method.java:511)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
09-06 15:30:40.191: E/AndroidRuntime(3942):     at dalvik.system.NativeStart.main(Native Method)
09-06 15:30:44.592: E/Trace(3971): error opening trace file: No such file or directory (2)
09-06 15:30:44.691: D/dalvikvm(3971): GC_FOR_ALLOC freed 36K, 7% free 2413K/2592K, paused 27ms, total 29ms
09-06 15:30:44.711: I/dalvikvm-heap(3971): Grow heap (frag case) to 4.553MB for 2160016-byte allocation
09-06 15:30:44.821: D/dalvikvm(3971): GC_FOR_ALLOC freed 1K, 4% free 4521K/4704K, paused 107ms, total 107ms
09-06 15:30:44.871: D/dalvikvm(3971): GC_CONCURRENT freed <1K, 4% free 4521K/4704K, paused 4ms+3ms, total 50ms
09-06 15:30:45.341: D/gralloc_goldfish(3971): Emulator without GPU emulation detected.
09-06 15:30:47.540: I/Choreographer(3971): Skipped 64 frames!  The application may be doing too much work on its main thread.

我发现了我的代码中的错误。倒数计时器方法中的 finish() 方法停止完成循环，递减方法会减少每一轮的分数，而不是在计时结束时减少分数。有人可以知道如何解决吗。请帮助我。

Answer 1

该 View 中显示的错误是编译错误。那不是他想要的。他想要运行时错误。他做得正确，但是他似乎没有粘贴整个 logcat 输出，因为他发布的行都不是错误行。

编辑:或者更确切地说，它们是系统级错误，开发人员可以忽略它们，因为它们是由系统自动处理的。您需要注意的是未捕获的异常，例如 NullPointerException 或 IllegalStateException 等...这些是应用程序级错误，您需要修复这些错误。