Question

我做了一个测验申请，其中包括5个问题。我创建了一个ResultActivity页面，显示测验结果。我为每个问题添加了一个20秒的countDown计时器。倒数计时器结束后，它会自动转到下一个问题。问题完成后，应移至ResultActivity页面以显示结果。

我只有一个问题...... Afetr到达我的最后一个问题..如果我没有选择任何答案并且计时器已经完成，则应用程序没有移动到我的ResultActivity页面。计时器在同一问题上一次又一次地开始，直到我选择任何选项

这是我的代码：

QuizActivity.java

package com.example.triviality;
import java.util.LinkedHashMap;
import java.util.List;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

public class QuizActivity extends Activity {
    List<question> quesList;
    public static int score, correct, wrong, wronganswers;
    public boolean isCorrect;
    static int qid = 0;
    int totalCount = 5;
    Question currentQ;
    TextView txtQuestion;
    RadioGroup radioGroup1;
    RadioButton rda, rdb, rdc;
    Button butNext;
    TextView rt;
    boolean nextFlag = false;
    boolean isTimerFinished = false;
    static LinkedHashMap lhm = new LinkedHashMap();
    MyCountDownTimer countDownTimer = new MyCountDownTimer(10000 /* 20 Sec */,
            1000);
    // final MyCountDownTimer timer = new MyCountDownTimer(20000,1000);
    public static String[] Correctanswers = new String[5];

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_quiz);
        DbHelper db = new DbHelper(this);
        quesList = db.getAllQuestions();
        currentQ = quesList.get(qid);
        txtQuestion = (TextView) findViewById(R.id.textView1);
        rda = (RadioButton) findViewById(R.id.radio0);
        rdb = (RadioButton) findViewById(R.id.radio1);
        rdc = (RadioButton) findViewById(R.id.radio2);
        butNext = (Button) findViewById(R.id.button1);
        // radioGroup1=(RadioGroup)findViewById(R.id.radioGroup1);
        setQuestionView();
        // timer.start();
        rt = (TextView) findViewById(R.id.rt);
        rt.setText("20");
        countDownTimer.start();
        butNext.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                countDownTimer.cancel();
                if (getNextQuestion(false)) {
                    // Start The timer again
                    countDownTimer.start();
                }
            }
        });
    }
    private void setQuestionView() {
        txtQuestion.setText(currentQ.getQUESTION());
        rda.setText(currentQ.getOPTA());
        rdb.setText(currentQ.getOPTB());
        rdc.setText(currentQ.getOPTC());
    }

    public class MyCountDownTimer extends CountDownTimer {
        public MyCountDownTimer(long startTime, long interval) {
            super(startTime, interval);
        }

        public void onFinish() {
            Log.e("Times up", "Times up");
            countDownTimer.cancel();
            if (getNextQuestion(false)) {
                // Start The timer again
                countDownTimer.start();
            }
        }
        @Override
        public void onTick(long millisUntilFinished) {
            rt.setText((millisUntilFinished / 1000) + "");
            Log.e("Second Gone", "Another Second Gone");
            Log.e("Time Remaining", "seconds remaining: " + millisUntilFinished
                    / 1000);
        }
    }
    boolean getNextQuestion(boolean c) {
        nextFlag = true;
        RadioGroup grp = (RadioGroup) findViewById(R.id.radioGroup1);
        // grp.clearCheck();
        RadioButton answer = (RadioButton) findViewById(grp
                .getCheckedRadioButtonId());
        if (rda.isChecked() || rdb.isChecked() || rdc.isChecked()) {
            qid++;
            Log.d("yourans", currentQ.getANSWER() + " " + answer.getText());
            grp.clearCheck();
            // wronganswers=
            if (!c && currentQ.getANSWER().equals(answer.getText())) {
                correct++;
            } else {
                lhm.put(currentQ.getQUESTION(), currentQ.getANSWER());
                wrong++;
            }

            if (qid < 5) {
                currentQ = quesList.get(qid);
                setQuestionView();

            } else {

                score = correct;
                Intent intent = new Intent(QuizActivity.this,
                        ResultActivity.class);
                Bundle b = new Bundle();
                b.putInt("score", score); // Your score
                intent.putExtras(b); // Put your score to your next Intent
                startActivity(intent);
                return false;
            }
        } else {
            lhm.put(currentQ.getQUESTION(), currentQ.getANSWER());
            qid++;

            if (qid < 5) {  
                currentQ = quesList.get(qid);
                //currentQ.getANSWER().equals(wrong);
                wrong++;
                Log.e("yourans", currentQ.getANSWER());
                setQuestionView();

            }
            // wrong++;
            // Log.e("Without Any Selection ", "without  "+wrong);
            // Toast.makeText(getApplicationContext(),
            // "Please select atleast one Option",Toast.LENGTH_SHORT).show();

        }

        return true;
    }
}




ResultActivity.java:

package com.example.triviality;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class ResultActivity extends Activity {
    Button restart;
    Button check;

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

        TextView t=(TextView)findViewById(R.id.textResult);
        TextView t1=(TextView)findViewById(R.id.textResult1);
        TextView t2=(TextView)findViewById(R.id.textResult2);
        restart=(Button)findViewById(R.id.restart);
        check=(Button)findViewById(R.id.check);

        StringBuffer sb=new StringBuffer();
        sb.append("Correct ans: "+QuizActivity.correct+"\n");
        StringBuffer sc=new StringBuffer();
        sc.append("Wrong ans : "+QuizActivity.wrong+"\n");
        StringBuffer sd=new StringBuffer();
        sd.append("Final Score : "+QuizActivity.score);
        t.setText(sb);
        t1.setText(sc);
        t2.setText(sd);
        QuizActivity.correct=0;
        QuizActivity.wrong=0;


        check.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                // TODO Auto-generated method stub
                Intent in=new Intent(getApplicationContext(),CheckActivity.class);
                startActivity(in);  
            }
        });

restart.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                //QuizActivity quiz=new QuizActivity();

                // TODO Auto-generated method stub
                Intent intent=new Intent(getApplicationContext(),QuizActivity.class);

                QuizActivity.lhm.clear();
                QuizActivity.qid=0;
                startActivity(intent);
                //quiz.countDownTimer.onTick(19);   
            }
        });
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_result, menu);
        return true;
    }
}

Answer 1

这是因为如果用户别无选择，则永远不会达到您的返回虚假陈述：

    if (rda.isChecked() || rdb.isChecked() || rdc.isChecked()){}

在这个if else语句中

稍后您将返回false。但是如果没有选择，你将自动返回true，因为上面这个语句中的代码块不会被rached。然后在你的计时器中你说：

    if (getNextQuestion(false)) {
            // Start The timer again
            countDownTimer.start();
        }

如果用户别无选择，

getNextQuestion总是如此，所以计时器一次又一次地启动。

测验应用程序中的Android CountDown计时器

1 个答案: