我正在开发一个android测验，可以使用json从MySQL提取问题，我已经成功地能够从数据库中提取问题，但是由于某种原因，无论我在应用程序中选择的答案如何，总是错误的选项。
我能够使用单选按钮获得正确的答案，但是我想通过按钮实现相同的成就
下面是我的测验活动，如果有人可以告诉我我到底在做错什么，我将不胜感激
更新
仅添加了相关代码
当我尝试验证所选答案时，我认为问题出在oncreate的某处，该问题使用按钮onclick侦听器方法
if (mButtonChoice1.getText() == mAnswer){
}
测验活动
public class HistoryActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_questions);
mp = MediaPlayer.create(this, R.raw.beep);
mTimer = (TextView)findViewById(R.id.timer);
num = (TextView)findViewById(R.id.textView18);
main_lay = (LinearLayout)findViewById(R.id.wrong_screen);
mImageView = (ImageView)findViewById(R.id.imageView2);
tv1 = (TextView) findViewById(R.id.textView28) ;
// tv2 = (TextView) findViewById(R.id.textView18) ;
// tv3 = (TextView) findViewById(R.id.question) ;
exit = (Button) findViewById(R.id.button4);
cancel = (ImageButton) findViewById(R.id.cncl);
param = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT,1);
mQuestionView = (TextView)findViewById(R.id.question);
mButtonChoice1 = (Button)findViewById(R.id.choice1);
mButtonChoice2 = (Button)findViewById(R.id.choice2);
mButtonChoice3 = (Button)findViewById(R.id.choice3);
mButtonChoice4 = (Button)findViewById(R.id.choice4);
// updateQuestion();
AsyncJsonObject asyncObject = new AsyncJsonObject();
asyncObject.execute("");
//Start of Button Listener for Button1
mButtonChoice1.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(final View view){
//My logic for Button goes in here
mAnswer = firstQuestion.getCorrectAnswer();
String correctAnswerForQuestion = firstQuestion.getCorrectAnswer();
if (mButtonChoice1.getText() == mAnswer){
mScore = mScore + 1;
mQuestions+=1;
cdn.cancel();
mButtonChoice1.startAnimation(animation);
mButtonChoice1.setBackgroundColor(Color.parseColor("#86b300"));
mButtonChoice1.setClickable(false);
mButtonChoice2.setClickable(false);
mButtonChoice3.setClickable(false);
mButtonChoice4.setClickable(false);
if (mQuestionNumber == QuestionLibrary.mQuestions.length) {
correctAnswer();
} else {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
view.clearAnimation();
currentQuizQuestion++;
firstQuestion = parsedObject.get(currentQuizQuestion);
mQuestionView.setText(firstQuestion.getQuestion());
String option1 = firstQuestion.getOption1();
String option2 = firstQuestion.getOption2();
String option3 = firstQuestion.getOption3();
String option4 = firstQuestion.getOption4();
mButtonChoice1.setText(option1);
mButtonChoice2.setText(option2);
mButtonChoice3.setText(option3);
mButtonChoice4.setText(option4);
// updateQuestion();
}
}, 1500);
}
//This line of code is optional
Toast.makeText(HistoryActivity.this, "correct", Toast.LENGTH_SHORT).show();
}else {
if (mButtonChoice2.getText() == correctAnswerForQuestion) {
mButtonChoice2.startAnimation(animation);
mButtonChoice2.setBackgroundColor(Color.parseColor("#ff9900"));
} else if (mButtonChoice3.getText() == correctAnswerForQuestion){
mButtonChoice3.startAnimation(animation);
mButtonChoice3.setBackgroundColor(Color.parseColor("#ff9900"));
} else{
mButtonChoice4.startAnimation(animation);
mButtonChoice4.setBackgroundColor(Color.parseColor("#ff9900"));
}
// showNextQuestion();
// wrongAnswer();
Toast.makeText(HistoryActivity.this, "wrong", Toast.LENGTH_SHORT).show();
mButtonChoice1.setBackgroundColor(Color.parseColor("#cc0000"));
}
stopSound();
}
});
//End of Button Listener for Button1
//Start of Button Listener for Button2
mButtonChoice2.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(final View view){
//My logic for Button goes in here
if (mButtonChoice2.getText() == mAnswer){
mScore = mScore + 1;
mQuestions+=1;
cdn.cancel();
mButtonChoice2.startAnimation(animation);
mButtonChoice2.setBackgroundColor(Color.parseColor("#86b300"));
mButtonChoice1.setClickable(false);
mButtonChoice2.setClickable(false);
mButtonChoice3.setClickable(false);
mButtonChoice4.setClickable(false);
if (mQuestionNumber == QuestionLibrary.mQuestions.length) {
correctAnswer();
} else {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
view.clearAnimation();
updateQuestion();
}
}, 1500);
}
//This line of code is optional
Toast.makeText(HistoryActivity.this, "correct", Toast.LENGTH_SHORT).show();
}else {
if (mButtonChoice1.getText() == mAnswer) {
mButtonChoice1.startAnimation(animation);
mButtonChoice1.setBackgroundColor(Color.parseColor("#ff9900"));
} else if (mButtonChoice3.getText() == mAnswer){
mButtonChoice3.startAnimation(animation);
mButtonChoice3.setBackgroundColor(Color.parseColor("#ff9900"));
} else {
mButtonChoice4.startAnimation(animation);
mButtonChoice4.setBackgroundColor(Color.parseColor("#ff9900"));
}
wrongAnswer();
Toast.makeText(HistoryActivity.this, "wrong", Toast.LENGTH_SHORT).show();
mButtonChoice2.setBackgroundColor(Color.parseColor("#cc0000"));
}
stopSound();
}
});
//End of Button Listener for Button2
//Start of Button Listener for Button3
mButtonChoice3.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(final View view){
//My logic for Button goes in here
if (mButtonChoice3.getText() == mAnswer){
mScore = mScore + 1;
mQuestions+=1;
cdn.cancel();
mButtonChoice3.startAnimation(animation);
mButtonChoice3.setBackgroundColor(Color.parseColor("#86b300"));
mButtonChoice1.setClickable(false);
mButtonChoice2.setClickable(false);
mButtonChoice3.setClickable(false);
mButtonChoice4.setClickable(false);
if (mQuestionNumber == QuestionLibrary.mQuestions.length) {
correctAnswer();
} else {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
view.clearAnimation();
updateQuestion();
}
}, 1500);
}
//This line of code is optional
Toast.makeText(HistoryActivity.this, "correct", Toast.LENGTH_SHORT).show();
}else {
if (mButtonChoice2.getText() == mAnswer) {
mButtonChoice2.startAnimation(animation);
mButtonChoice2.setBackgroundColor(Color.parseColor("#ff9900"));
} else if (mButtonChoice1.getText() == mAnswer){
mButtonChoice1.startAnimation(animation);
mButtonChoice1.setBackgroundColor(Color.parseColor("#ff9900"));
} else {
mButtonChoice4.startAnimation(animation);
mButtonChoice4.setBackgroundColor(Color.parseColor("#ff9900"));
}
wrongAnswer();
Toast.makeText(HistoryActivity.this, "wrong", Toast.LENGTH_SHORT).show();
mButtonChoice3.setBackgroundColor(Color.parseColor("#cc0000"));
}
stopSound();
}
});
//End of Button Listener for Button3
//Start of Button Listener for Button4
mButtonChoice4.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(final View view){
//My logic for Button goes in here
if (mButtonChoice4.getText() == mAnswer){
mScore = mScore + 1;
mQuestions+=1;
cdn.cancel();
mButtonChoice4.startAnimation(animation);
mButtonChoice4.setBackgroundColor(Color.parseColor("#86b300"));
mButtonChoice1.setClickable(false);
mButtonChoice2.setClickable(false);
mButtonChoice3.setClickable(false);
mButtonChoice4.setClickable(false);
if (mQuestionNumber == QuestionLibrary.mQuestions.length) {
correctAnswer();
} else {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
view.clearAnimation();
updateQuestion();
}
}, 1500);
}
//This line of code is optional
Toast.makeText(HistoryActivity.this, "correct", Toast.LENGTH_SHORT).show();
}else {
if (mButtonChoice2.getText() == mAnswer) {
mButtonChoice2.startAnimation(animation);
mButtonChoice2.setBackgroundColor(Color.parseColor("#ff9900"));
} else if (mButtonChoice3.getText() == mAnswer){
mButtonChoice3.startAnimation(animation);
mButtonChoice3.setBackgroundColor(Color.parseColor("#ff9900"));
} else {
mButtonChoice1.startAnimation(animation);
mButtonChoice1.setBackgroundColor(Color.parseColor("#ff9900"));
}
wrongAnswer();
Toast.makeText(HistoryActivity.this, "wrong", Toast.LENGTH_SHORT).show();
mButtonChoice4.setBackgroundColor(Color.parseColor("#cc0000"));
}
stopSound();
}
});
}
private class AsyncJsonObject extends AsyncTask<String, Void, String> {
private ProgressDialog progressDialog;
@Override
protected String doInBackground(String... params) {
HttpClient httpClient = new DefaultHttpClient(new BasicHttpParams());
HttpPost httpPost = new HttpPost("localhost/user/getQuestions.php");
String jsonResult = "";
try {
HttpResponse response = httpClient.execute(httpPost);
jsonResult = inputStreamToString(response.getEntity().getContent()).toString();
System.out.println("Returned Json object " + jsonResult.toString());
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return jsonResult;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressDialog = ProgressDialog.show(HistoryActivity.this, "Downloading Questions","Please Wait....", true);
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
System.out.println("Resulted Value: " + result);
parsedObject = returnParsedJsonObject(result);
if(parsedObject == null){
return;
}
quizCount = parsedObject.size();
firstQuestion = parsedObject.get(0);
mQuestionView.setText(firstQuestion.getQuestion());
mButtonChoice1.setText(firstQuestion.getOption1());
mButtonChoice2.setText(firstQuestion.getOption2());
mButtonChoice3.setText(firstQuestion.getOption3());
mButtonChoice4.setText(firstQuestion.getOption4());
mAnswer = firstQuestion.getCorrectAnswer();
}
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = br.readLine()) != null) {
answer.append(rLine);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return answer;
}
}
private List<Question> returnParsedJsonObject(String result){
List<Question> jsonObject = new ArrayList<Question>();
JSONObject resultObject = null;
JSONArray jsonArray = null;
Question newItemObject = null;
try {
resultObject = new JSONObject(result);
System.out.println("Testing the water " + resultObject.toString());
jsonArray = resultObject.optJSONArray("questions");
} catch (JSONException e) {
e.printStackTrace();
}
if (jsonArray != null) { // check jsonArray is null?
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonChildNode = null;
try {
jsonChildNode = jsonArray.getJSONObject(i);
int id = jsonChildNode.getInt("id");
String question = jsonChildNode.getString("question");
String answerOption1 = jsonChildNode.getString("option1");
String answerOption2 = jsonChildNode.getString("option2");
String answerOption3 = jsonChildNode.getString("option3");
String answerOption4 = jsonChildNode.getString("option4");
String correctAnswer = jsonChildNode.getString("correct_answer");
newItemObject = new Question(id, question, answerOption1, answerOption2, answerOption3, answerOption4, correctAnswer);
jsonObject.add(newItemObject);
}
catch (JSONException e) {
e.printStackTrace();
}
}
return jsonObject;
}
return jsonObject;
}
private void showNextQuestion() {
currentQuizQuestion++;
firstQuestion = parsedObject.get(currentQuizQuestion);
mQuestionView.setText(firstQuestion.getQuestion());
mButtonChoice1.setText(firstQuestion.getOption1());
mButtonChoice2.setText(firstQuestion.getOption2());
mButtonChoice3.setText(firstQuestion.getOption3());
mButtonChoice4.setText(firstQuestion.getOption4());
mAnswer = firstQuestion.getCorrectAnswer();
}
}