Develop Reference

I am making a quiz app when i pressing the answer A,B,C,D it was not showing the next one

I am making a quiz app when I pressing the answer it was not showing the next question directly it was going to done activity where the score of the quiz will be displayed. Please tell me what to do and the changes i have to made for it. Please tell me in detail and which line the problem causes, because I am still learning, plz And also suggest me some improvements.
public class Playing extends AppCompatActivity implements View.OnClickListener {
final static long INTERVAL = 1000; // 1sec = 1000
final static long TIMEOUT = 7000; // 7000 = 7sec
int progressValue = 0;
CountDownTimer mCountDown;
int index = 0, score = 0, thisQuestion = 0, totalQuestion, correctAnswer;
ProgressBar progressBar;
ImageView question_image;
Button btnA, btnB, btnC, btnD;
TextView txtScore, txtQuestionNum, question_text;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_playing);
//View
txtScore = (TextView) findViewById(R.id.txtScore);
txtQuestionNum = (TextView) findViewById(R.id.txtTotalQuestion);
question_text = (TextView) findViewById(R.id.question_text);
question_image = (ImageView) findViewById(R.id.question_image);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
btnA = (Button) findViewById(R.id.btnAnswerA);
btnB = (Button) findViewById(R.id.btnAnswerB);
btnC = (Button) findViewById(R.id.btnAnswerC);
btnD = (Button) findViewById(R.id.btnAnswerD);
btnA.setOnClickListener(this);
btnB.setOnClickListener(this);
btnC.setOnClickListener(this);
btnD.setOnClickListener(this);
}
#Override
public void onClick(View view) {
mCountDown.cancel();
if (index < totalQuestion) //still have question in List
{
Button clickedButton = (Button) view;
if (clickedButton.getText().equals(Common.questionList.get(index).getCorrectAnswer())) {
//Choose correct answer
score += 10;
correctAnswer++;
showQuestion(++index); //next question
} else {
//Choose wrong answer
Intent intent = new Intent(this, Done.class);
Bundle dataSend = new Bundle();
dataSend.putInt("SCORE", score);
dataSend.putInt("TOTAL", totalQuestion);
dataSend.putInt("CORRECT", correctAnswer);
intent.putExtras(dataSend);
startActivity(intent);
finish();
}
}
}
private void showQuestion(int index) {
if (index < totalQuestion) {
thisQuestion++;
txtQuestionNum.setText(String.format(Locale.getDefault(), "%d / %d", thisQuestion, totalQuestion));
progressBar.setProgress(0);
progressValue = 0;
if (Common.questionList.get(index).getIsImageQuestion().equals("true")) {
//if is image
Picasso.get().load(Common.questionList.get(index).getQuestion()).into(question_image);
question_image.setVisibility(View.VISIBLE);
question_text.setVisibility(View.INVISIBLE);
} else {
question_text.setText(Common.questionList.get(index).getQuestion());
//If question is text,we will set image to invisible
question_image.setVisibility(View.INVISIBLE);
question_text.setVisibility(View.VISIBLE);
}
btnA.setText(Common.questionList.get(index).getAnswerA());
btnB.setText(Common.questionList.get(index).getAnswerB());
btnC.setText(Common.questionList.get(index).getAnswerC());
btnD.setText(Common.questionList.get(index).getAnswerD());
mCountDown.start(); //Start timer
} else {
//If it is final question
Intent intent = new Intent(this, Done.class);
Bundle dataSend = new Bundle();
dataSend.putInt("SCORE", score);
dataSend.putInt("TOTAL", totalQuestion);
dataSend.putInt("CORRECT", correctAnswer);
intent.putExtras(dataSend);
startActivity(intent);
finish();
}
}
#Override
protected void onResume() {
super.onResume();
totalQuestion = Common.questionList.size();
mCountDown = new CountDownTimer(TIMEOUT, INTERVAL) {
#Override
public void onTick(long minisec) {
progressBar.setProgress(progressValue);
progressValue++;
}
#Override
public void onFinish() {
mCountDown.cancel();
showQuestion(++index);
}
};
showQuestion(index);
}
}

There is no onClickListener within your Activity. I would recommend creating a "next()" function, and then, for each of the buttons, do something along the lines of:
btn.setOnClickListener(new View.OnClickListener(){
next()
})

I have made a quiz app and i want to save my options selected for questions and use them in my review activity

I have made a quiz app and i want to save my options selected for questions and use them in my review activity, but I am not getting how to do that, see if anybody can help....
Here is my Quiz Activity code:
public class NumberSystem1Activity extends AppCompatActivity {
private RadioGroup radioGroup;
private NumberSystem1QuestionBank mNumberSystem1QuestionBank = new NumberSystem1QuestionBank();
private TextView mScoreView;
private TextView times;//For Timer in Quiz
private TextView mQuestionView;
private ImageView mQuestionImageView;
private RadioButton mButtonChoice1;
private RadioButton mButtonChoice2;
private RadioButton mButtonChoice3;
private RadioButton mButtonChoice4;
private String mAnswer;
private int mScore = 0;
private int mQuestionNumber = 0;
private int count_correct_answer =0;
private int count_wrong_answer=0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.testactivity1);
radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
radioGroup.clearCheck();
mScoreView = (TextView) findViewById(R.id.score);
mQuestionImageView = (ImageView)findViewById(R.id.image);
mQuestionView = (TextView) findViewById(R.id.question);
mButtonChoice1 = (RadioButton) findViewById(R.id.choice1);
mButtonChoice2 = (RadioButton) findViewById(R.id.choice2);
mButtonChoice3 = (RadioButton) findViewById(R.id.choice3);
mButtonChoice4 = (RadioButton) findViewById(R.id.choice4);
final Button go = (Button) findViewById(R.id.button2);
updateQuestion();
// Set the timer for Quiz
times = (TextView) findViewById(R.id.timers);
// method which will set the things up for our game
times.setText("00:02:00");
// A timer of 20 minutes to play for, with an interval of 1 second (1000 milliseconds)
NumberSystem1Activity.CounterClass timer = new NumberSystem1Activity.CounterClass(30000, 1000);
timer.start();
//Code Ends here
go.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mButtonChoice1.isChecked()) {
if (mButtonChoice1.getText() == mAnswer) {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = mScore + 3;
updateScore(mScore);
count_correct_answer++;
mButtonChoice1.setBackgroundColor(Color.GREEN);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Correct Answer", Toast.LENGTH_SHORT).show();
}
else {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = (mScore - 1);
count_wrong_answer++;
updateScore(mScore);
mButtonChoice1.setBackgroundColor(Color.RED);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Wrong Answer", Toast.LENGTH_SHORT).show();
}
} else if (mButtonChoice2.isChecked()) {
if (mButtonChoice2.getText() == mAnswer) {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = mScore + 3;
updateScore(mScore);
count_correct_answer++;
mButtonChoice2.setBackgroundColor(Color.GREEN);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Correct Answer", Toast.LENGTH_SHORT).show();
}
else {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = (mScore - 1);
count_wrong_answer++;
updateScore(mScore);
mButtonChoice2.setBackgroundColor(Color.RED);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Wrong Answer", Toast.LENGTH_SHORT).show();
}
} else if (mButtonChoice3.isChecked()) {
if (mButtonChoice3.getText() == mAnswer) {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = mScore + 3;
updateScore(mScore);
count_correct_answer++;
mButtonChoice3.setBackgroundColor(Color.GREEN);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Correct Answer", Toast.LENGTH_SHORT).show();
}
else {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = (mScore - 1);
count_wrong_answer++;
updateScore(mScore);
mButtonChoice3.setBackgroundColor(Color.RED);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Wrong Answer", Toast.LENGTH_SHORT).show();
}
} else if (mButtonChoice4.isChecked()) {
if (mButtonChoice4.getText() == mAnswer) {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = mScore + 3;
updateScore(mScore);
count_correct_answer++;
mButtonChoice4.setBackgroundColor(Color.GREEN);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Correct Answer", Toast.LENGTH_SHORT).show();
}
else {
//Post Question Delay Code
final Handler handle = new Handler();
Runnable delay = new Runnable() {
public void run() {
//Code Ends hers
updateQuestion();
}
};
handle.postDelayed(delay, 2000);
mScore = (mScore - 1);
count_wrong_answer++;
updateScore(mScore);
mButtonChoice4.setBackgroundColor(Color.RED);
//This line of code is optional
Toast.makeText(NumberSystem1Activity.this, "Wrong Answer", Toast.LENGTH_SHORT).show();
}
}
}
});
}
public void onClear(View v) {
/* Clears all selected radio buttons to default */
radioGroup.clearCheck();
}
#TargetApi(Build.VERSION_CODES.GINGERBREAD)
#SuppressLint("NewApi")
public class CounterClass extends CountDownTimer {
public CounterClass(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
// TODO Auto-generated constructor stub
}
#Override
public void onFinish() {
times.setText("Time is up");
Intent intent = new Intent(NumberSystem1Activity.this, ResultActivity.class);
Bundle b = new Bundle();
b.putInt("mScore", + mScore); // Your score
intent.putExtras(b); // Put your score to your next
Bundle c = new Bundle();
c.putInt("count_correct_answer", + count_correct_answer); // Your score
intent.putExtras(c); // Put your Correct Answer score to your next
Bundle d = new Bundle();
d.putInt("count_wrong_answer", + count_wrong_answer); // Your score
intent.putExtras(d); // Put your Wrong Answer score to your next
startActivity(intent);
finish();
}
#Override
public void onTick(long millisUntilFinished) {
// TODO Auto-generated method stub
long millis = millisUntilFinished;
String hms = String.format(
"%02d:%02d:%02d",
TimeUnit.MILLISECONDS.toHours(millis),
TimeUnit.MILLISECONDS.toMinutes(millis)
- TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS
.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis)
- TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS
.toMinutes(millis)));
System.out.println(hms);
times.setText(hms);
}
}
private void updateQuestion(){
if (mQuestionNumber< 30) {
// if questions are not over then do this
mQuestionView.setText(mNumberSystem1QuestionBank.getQuestion(mQuestionNumber));
mQuestionImageView.setImageResource(mNumberSystem1QuestionBank.getQuestionImages(mQuestionNumber));
mButtonChoice1.setText(mNumberSystem1QuestionBank.getChoice1(mQuestionNumber));
mButtonChoice2.setText(mNumberSystem1QuestionBank.getChoice2(mQuestionNumber));
mButtonChoice3.setText(mNumberSystem1QuestionBank.getChoice3(mQuestionNumber));
mButtonChoice4.setText(mNumberSystem1QuestionBank.getChoice4(mQuestionNumber));
mAnswer = mNumberSystem1QuestionBank.getCorrectAnswer(mQuestionNumber);
radioGroup.clearCheck();
mQuestionNumber++;
//set all buttons Blue for next question
mButtonChoice1.setBackgroundResource(R.color.blue_light);
mButtonChoice2.setBackgroundResource(R.color.blue_dark);
mButtonChoice3.setBackgroundResource(R.color.blue_light);
mButtonChoice4.setBackgroundResource(R.color.blue_dark);
}
else {
// if over do this
Intent intent = new Intent(NumberSystem1Activity.this, ResultActivity.class);
Bundle b = new Bundle();
b.putInt("mScore", mScore); // Your score
intent.putExtras(b); // Put your score to your next
Bundle c = new Bundle();
c.putInt("count_correct_answer", + count_correct_answer); // Your score
intent.putExtras(c); // Put your Correct Answer score to your next
Bundle d = new Bundle();
d.putInt("count_wrong_answer", + count_wrong_answer); // Your score
intent.putExtras(d); // Put your Wrong Answer score to your next
startActivity(intent);
finish();
}
}
private void updateScore(int point){
mScoreView.setText("" + mScore);
}
Here is my Review Activity code:
public class ReviewActivity1 extends AppCompatActivity {
private NumberSystem1QuestionBank mNumberSystem1QuestionBank = new NumberSystem1QuestionBank();
private TextView mQuestionView;
private ImageView mQuestionImageView;
private TextView mExplanationView;
private ImageView mExplanationImageView;
private TextView mCorrectAnswer;
private int mQuestionNumber = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_review);
mQuestionView = (TextView) findViewById(R.id.question);
mQuestionImageView = (ImageView)findViewById(R.id.image);
mExplanationView = (TextView) findViewById(R.id.ExplanationText);
mExplanationImageView = (ImageView)findViewById(R.id.photo);
mCorrectAnswer = (TextView) findViewById(R.id.CorrectAnswerText);
final Button pre = (Button) findViewById(R.id.previous);
final Button next = (Button) findViewById(R.id.next);
updateQuestion();
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mQuestionNumber<30){
mQuestionNumber++;
updateQuestion();
}
else {
Intent intent = new Intent(ReviewActivity1.this, MainActivity.class);
startActivity(intent);
finish();
}
}
});
//if you want to disable the back button on the first question
pre.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(mQuestionNumber>0) {
mQuestionNumber--;
updateQuestion();
} else {
Toast.makeText(ReviewActivity1.this, "This is the First Question. No Previous One.", Toast.LENGTH_SHORT).show();
// you're at the first question => no previous one
}
}
});
}
private void updateQuestion() {
if (mQuestionNumber < 30) {
// if questions are not over then do this
mQuestionView.setText(mNumberSystem1QuestionBank.getQuestion(mQuestionNumber));
mQuestionImageView.setImageResource(mNumberSystem1QuestionBank.getQuestionImages(mQuestionNumber));
mExplanationView.setText(mNumberSystem1QuestionBank.getExplanations(mQuestionNumber));
mExplanationImageView.setImageResource(mNumberSystem1QuestionBank.getExplanationImages(mQuestionNumber));
mCorrectAnswer.setText(mNumberSystem1QuestionBank.getCorrectAnswer(mQuestionNumber));
} else {
Intent intent = new Intent(ReviewActivity1.this, MainActivity.class);
startActivity(intent);
finish();
}
}
#Override
public void onBackPressed(){
//Exit The Quiz Alert Dialog
AlertDialog.Builder builder = new AlertDialog.Builder(ReviewActivity1.this);
builder.setMessage("Do you want to Exit the Review." );
builder.setCancelable(true);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(ReviewActivity1.this, MainActivity.class);
startActivity(intent);
Toast.makeText(ReviewActivity1.this, "Test Page Appeared.", Toast.LENGTH_SHORT).show();
finish();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}

Progress bar base on right answer

I create a simple math game and I would like to update my progress bar base on the right question answer.
Examples: every time I answer correctly to a question the progress bar should go bu 10% and so on.
public class QuestionActivity extends Activity
{
List<Question> quesList;
int score = 0;
int qid = 0;
Question currentQ;
TextView txtQuestion, times, scored;
Button button1, button2, button3;
ProgressBar pb;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
QuizHelper db = new QuizHelper(this); // my question bank class
quesList = db.getAllQuestions(); // this will fetch all quetonall
questions
currentQ = quesList.get(qid); // the current question
// the textview in which the question will be displayed
txtQuestion = (TextView) findViewById(R.id.txtQuestion);
//the progress bar in which progress will be displayed
pb = (ProgressBar)findViewById(R.id.progressBar);
// the three buttons,
// the idea is to set the text of three buttons with the options from
question bank
button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
button3 = (Button) findViewById(R.id.button3);
// the textview in which score will be displayed
scored = (TextView) findViewById(R.id.score);
// the timer
times = (TextView) findViewById(R.id.timers);
// method which will set the things up for our game
setQuestionView();
times.setText("00:02:00");
// A timer of 60 seconds to play for, with an interval of 1 second (1000
milliseconds)
CounterClass timer = new CounterClass(60000, 1000);
timer.start();
// button click listeners
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// passing the button text to other method
// to check whether the answer is correct or not
// same for all three buttons
getAnswer(button1.getText().toString());
setProgressBar();
}
});
button2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getAnswer(button2.getText().toString());
setProgressBar();
}
});
button3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getAnswer(button3.getText().toString());
setProgressBar();
}
});
}
public void getAnswer(String AnswerString) {
if (currentQ.getAnswer().equals(AnswerString)) {
// if conditions matches increase the int (score) by 1
// and set the text of the score view
score++;
scored.setText("Score : " + score);
} else {
// if unlucky start activity and finish the game
Intent intent = new Intent(QuestionActivity.this,
ResultActivity.class);
// passing the int value
Bundle b = new Bundle();
b.putInt("score", score); // Your score
intent.putExtras(b); // Put your score to your next
startActivity(intent);
finish();
}
if (qid < 20) {
// if questions are not over then do this
currentQ = quesList.get(qid);
setQuestionView();
} else {
// if over do this
Intent intent = new Intent(QuestionActivity.this,
ResultActivity.class);
Bundle b = new Bundle();
b.putInt("score", score); // Your score
intent.putExtras(b); // Put your score to your next
startActivity(intent);
finish();
}
}
#TargetApi(Build.VERSION_CODES.GINGERBREAD)
#SuppressLint("NewApi")
public class CounterClass extends CountDownTimer {
public CounterClass(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
// TODO Auto-generated constructor stub
}
#Override
public void onFinish() {
times.setText("Time is up");
}
//#Override
public void onTick(long millisUntilFinished) {
// TODO Auto-generated method stub
long millis = millisUntilFinished;
String hms = String.format(
"%02d:%02d:%02d",
TimeUnit.MILLISECONDS.toHours(millis),
TimeUnit.MILLISECONDS.toMinutes(millis)
- TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS
.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis)
- TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS
.toMinutes(millis)));
System.out.println(hms);
times.setText(hms);
}
}
private void setQuestionView() {
// the method which will put all things together
txtQuestion.setText(currentQ.getQuestion());
button1.setText(currentQ.getOptionA());
button2.setText(currentQ.getOptionB());
button3.setText(currentQ.getOptionC());
qid++;
}
private void setProgressBar()
{
}
}

private void setProgressBar()
{
int progress=pb.getProgress();
if(progress<100)
pb.setProgress(progress+10)
}
this should do the trick, it will increase progress by 10 every time you call setProgressBar() method

First :
Set ur Progress bar limit
pb.setMax(Total Quest *10)
later in
For every Correct Answer Inc score++;
private void setProgressBar()
{
pb.setProgress(score*10);
}

Android button text color does not change

I'm working on a quiz app that has a question and to answer options. When the wrong answer (button) is clicked, the text color for that specific button turns red, as it should. However, when the right button is clicked, the text color for that particular button should turn green, wait a second, and then move on to the next question.
I have spent days trying to figure out why it doesn't work, googled for answers, but I still can't make it work.
I have tried using Handlers and Runnables, but it still doesn't work.
I have posted the full code for the activity below.
Please help!
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.question_layout);
Intent i = getIntent();
subject = (Subject) i.getSerializableExtra(Globals.SUBJECT);
questions = subject.getQuestions();
subjectId = subject.getSubjectId();
appPreferences = new AppPreferences();
livesLeft = 3;
index = 0;
maxQuestions = questions.size();
maxIndex = maxQuestions - 1;
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setMax(maxQuestions);
answer1 = (Button) findViewById(R.id.buttonAnswer1);
answer2 = (Button) findViewById(R.id.buttonAnswer2);
setQuestionsAndAnswers(index);
TextView textView = (TextView) findViewById(R.id.textViewSubjectName);
textView.setText(subject.getSubjectName());
}
private void setQuestionsAndAnswers(int index)
{
currentQuestion = questions.get(index);
// Set question
TextView textViewQuestion = (TextView) findViewById(R.id.textViewQuestion);
textViewQuestion.setText(currentQuestion.getQuestion());
// Set correct answer
correctAnswer = currentQuestion.getCorrectAnswer();
sourceUrl = currentQuestion.getSourceUrl();
sourceText = currentQuestion.getSourceText();
// Set answer #1
initializeButton(answer1, currentQuestion.getAnswer1());
// Set answer #2
initializeButton(answer2, currentQuestion.getAnswer2());
// Set source
TextView textViewSource = (TextView) findViewById(R.id.textViewSource);
textViewSource.setText(sourceText);
textViewSource.setPaintFlags(Paint.UNDERLINE_TEXT_FLAG);
textViewSource.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(sourceUrl));
startActivity(browserIntent);
}
});
// Update progress
updateProgress(index);
}
private void initializeButton(Button button, String answer)
{
button.setText(answer);
button.setTextColor(Color.WHITE);
button.setBackgroundColor(Color.TRANSPARENT);
button.setEnabled(true);
button.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View view)
{
onClickContent(view);
}
});
}
private void onClickContent(View view)
{
Context context = getApplicationContext();
final Button button = (Button) view;
String answer = button.getText().toString();
if (answer.equalsIgnoreCase(correctAnswer))
{
button.setTextColor(Color.GREEN);
try
{
Thread.sleep(1000);
} catch (InterruptedException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
if (index == maxIndex)
{
appPreferences.editPreferences(context, Globals.PREFERENCE_KEY + subjectId, true);
playSound(Globals.SOUND_QUIZ_COMPLETED);
Toast toast = Toast.makeText(context, "Quiz \"" + subject.getSubjectName() + "\" finished",Toast.LENGTH_LONG);
toast.show();
finish();
} else
{
playSound(Globals.SOUND_CORRECT_ANSER);
// Go to next question
index++;
setQuestionsAndAnswers(index);
}
} else
{
if (livesLeft == 1)
{
playSound(Globals.SOUND_GAME_OVER);
Toast toast = Toast.makeText(context, "Game over", Toast.LENGTH_LONG);
toast.show();
finish();
} else
{
playSound(Globals.SOUND_WRONG_ANSWER);
button.setTextColor(Color.RED);
button.setEnabled(false);
livesLeft--;
TextView lives = (TextView) findViewById(R.id.textViewLives);
lives.setText("Lives: " + livesLeft);
}
}
}
private void updateProgress(int progress)
{
progressBar.setProgress(progress++);
}
private void playSound(int songId)
{
MediaPlayer mp = MediaPlayer.create(getApplicationContext(), songId);
mp.start();
}

Firstly, Thread.sleep(1000); in your case runs on MAIN thread, causes MAIN thread to sleep, it's not suggested.
You may view.postDelayed to load next question after a delay,
private void onClickContent(View view)
{
Context context = getApplicationContext();
final Button button = (Button) view;
String answer = button.getText().toString();
if (answer.equalsIgnoreCase(correctAnswer))
{
button.setTextColor(Color.GREEN);
if (index == maxIndex)
{
appPreferences.editPreferences(context, Globals.PREFERENCE_KEY + subjectId, true);
playSound(Globals.SOUND_QUIZ_COMPLETED);
Toast toast = Toast.makeText(context, "Quiz \"" + subject.getSubjectName() + "\" finished",Toast.LENGTH_LONG);
toast.show();
finish();
} else
{
playSound(Globals.SOUND_CORRECT_ANSER);
// Go to next question
index++;
// Go to next question after 1000ms
view.postDelayed(new Runnable() {
public void run() {
setQuestionsAndAnswers(index);
}
}, 1000); //here delays 1000ms
}
}
...
}

This is what I use for the same purpose. It should work...
button.setTextColor(Color.GREEN);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
// Reset Color if you want to...
// Start new question here
}
}, 1000);

Android Quiz Game - Countdown timer for each qstion

I have created a Quiz app for Android using the tutorial here: http://automateddeveloper.blogspot.co.uk/2011/06/getting-started-complete-android-app.html
For each question, the user will only have 20 seconds to answer it. If he/she fails to answer in 20 seconds, an AlertDialog will popup and the game will terminate.
To do this, I have added a counter in the OnCreate method of QuestionActivity class:
final TextView myCounter = (TextView) findViewById(R.id.countdown);
new CountDownTimer(20000, 1000) {
#Override
public void onFinish() {
timeUp();
}
#Override
public void onTick(long millisUntilFinished) {
myCounter.setText("Time left: "
+ String.valueOf(millisUntilFinished / 1000));
}
}.start();
public void timeUp() {
AlertDialog.Builder builder = new AlertDialog.Builder(
QuestionActivity.this);
builder.setTitle("Times up!")
.setMessage("Game over")
.setCancelable(false)
.setNeutralButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
QuestionActivity.this.finish();
}
});
AlertDialog alert = builder.create();
alert.show();
}
The counter works displays and functions on screen correctly. After answering a question, the activity moves to the next question and the counter resets itself to 20 seconds again.
The problem
The quiz has 15 questions, after answering 3 or 4 questions, the app crashes and I get the following error:
07-18 00:49:05.530: E/AndroidRuntime(4867): android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy#41533a80 is not valid; is your activity running?
I believe this relates to the AlertDialog. I have looked up this error code on Stackoverflow and the popular solution is to pass ActivityName.this as the context when building the AlertDialog.
Unfortunately this does not solve the problem.
I believe the counter is setting a time limit of 20 seconds for the whole activity. My requirement is 20 seconds for each question.
However, the counter resets to 20 seconds when the user press the' Next button and the activity moves to the next question.
Should I be resetting the counter when the user presses the Next button? Here is the OnClickListener code for the Next button
if (currentGame.isGameOver()) {
Intent i = new Intent(this, EndgameActivity.class);
startActivity(i);
finish();
} else {
Intent i = new Intent(this, QuestionActivity.class);
startActivity(i);
SHOULD I ADD SOMETHING HERE?
finish();
Can anyone help me code a solution to my problem?
Here is all the code in QuestionActivity.class
public class QuestionActivity extends SherlockActivity implements
OnClickListener {
private Question currentQ;
private GamePlay currentGame;
private Context context;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.question);
getSupportActionBar().hide();
/**
* Configure current game and get question
*/
currentGame = ((ChuckApplication) getApplication()).getCurrentGame();
currentQ = currentGame.getNextQuestion();
Button nextBtn = (Button) findViewById(R.id.nextBtn);
nextBtn.setOnClickListener(this);
Button quitBtn = (Button) findViewById(R.id.quitBtn);
quitBtn.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
finish();
}
});
//Update the question and answer options..
setQuestions();
final TextView myCounter = (TextView) findViewById(R.id.countdown);
new CountDownTimer(20000, 1000) {
#Override
public void onFinish() {
// myCounter.setText("Time up!");
timeUp(context);
}
#Override
public void onTick(long millisUntilFinished) {
myCounter.setText("Time left: "
+ String.valueOf(millisUntilFinished / 1000));
}
}.start();
}
public void timeUp(Context context) {
AlertDialog.Builder builder = new AlertDialog.Builder(
QuestionActivity.this);
builder.setTitle("Times up!")
.setMessage("Game over")
.setCancelable(false)
.setNeutralButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
QuestionActivity.this.finish();
}
});
AlertDialog alert = builder.create();
alert.show();
}
/**
* 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)));
}
public void onClick(View arg0) {
//validate a checkbox has been selected
if (!checkAnswer())
return;
//check if end of game
if (currentGame.isGameOver()) {
Intent i = new Intent(this, EndgameActivity.class);
startActivity(i);
finish();
} else {
Intent i = new Intent(this, QuestionActivity.class);
startActivity(i);
finish();
}
}
#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() {
String answer = getSelectedAnswer();
if (answer == null) {
// Log.d("Questions", "No Checkbox selection made - returning");
return false;
} else {
// Log.d("Questions",
// "Valid Checkbox selection made - check if correct");
if (currentQ.getAnswer().equalsIgnoreCase(answer)) {
// Log.d("Questions", "Correct Answer!");
currentGame.incrementRightAnswers();
} else {
// Log.d("Questions", "Incorrect Answer!");
currentGame.incrementWrongAnswers();
}
return true;
}
}
private String getSelectedAnswer() {
RadioButton c1 = (RadioButton) findViewById(R.id.answer1);
RadioButton c2 = (RadioButton) findViewById(R.id.answer2);
RadioButton c3 = (RadioButton) findViewById(R.id.answer3);
RadioButton c4 = (RadioButton) findViewById(R.id.answer4);
if (c1.isChecked()) {
return c1.getText().toString();
}
if (c2.isChecked()) {
return c2.getText().toString();
}
if (c3.isChecked()) {
return c3.getText().toString();
}
if (c4.isChecked()) {
return c4.getText().toString();
}
return null;
}

I think the activity doesn't exist anymore at a certain point when you try to make the dialog(probably when the CountDownTimer is near the end?!?).
Anyway I think finishing and starting the same activity for each question isn't such a good idea, instead you could use the current activity and simply restart the timer. For example:
public class QuestionActivity extends SherlockActivity implements
OnClickListener {
private CountDownTimer mCountDown;
#Override
public void onCreate(Bundle savedInstanceState) {
// ...
mCountDown = new CountDownTimer(20000, 1000) {
#Override
public void onFinish() {
// myCounter.setText("Time up!");
timeUp(context);
}
#Override
public void onTick(long millisUntilFinished) {
myCounter.setText("Time left: "
+ String.valueOf(millisUntilFinished / 1000));
}
}.start();
// ...
and in the onClick callback do the same to setup a new question, stop the old timer and restart the new timer:
//check if end of game
if (currentGame.isGameOver()) {
Intent i = new Intent(this, EndgameActivity.class);
startActivity(i);
finish();
} else {
if (mCountDown != null) {
mCountDown.cancel();
}
currentQ = currentGame.getNextQuestion();
setQuestions();
mCountDown = new CountDownTimer(20000, 1000) {
#Override
public void onFinish() {
// myCounter.setText("Time up!");
timeUp(context);
}
#Override
public void onTick(long millisUntilFinished) {
myCounter.setText("Time left: "
+ String.valueOf(millisUntilFinished / 1000));
}
}.start();
}
Also, in the callback for the Dialog's Button I would first close the Dialog before finishing the Activity:
((AlertDialog) dialog).dismiss();
QuestionActivity.this.finish();