我正在为我的学院活动开发一个测验应用程序。我们有四种类型的三个问题：图像库，Sql，Direction Sense和Code代码片段。当计时器用完或玩家点击下一个按钮时，我们继续进行下一个问题。现在，在计时器的情况下，rand（）方法被调用两次。日志告诉我它在计时器onfinish（）中被调用了两次。我们假设目前最多有12个问题。
以下是问题活动的代码：
public class Question extends AppCompatActivity {
private ImageView quesimage;
private TextView timer;
private RadioGroup optionsgroup;
private int quesid;
private RadioButton one, two, three, four;
private TextView questionTextView;
private boolean flag = true;
private int count = 0;
private int time;
int arr[][] = {{0, 0, 1}, {0, 1, 1}, {0, 2, 1}, {1, 0, 1}, {1, 1, 1}, {1, 2, 1}, {2, 0, 1}, {2, 1, 1}, {2, 2, 1}, {3, 0, 1}, {3, 1, 1}, {3, 2, 1}};
//TODO question recurrence fix.//High priority.
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.question_layout);
quesimage = findViewById(R.id.quesimage);
timer = findViewById(R.id.timer);
questionTextView = findViewById(R.id.questext);
optionsgroup = findViewById(R.id.optionsgroup);
one = findViewById(R.id.optionone);
two = findViewById(R.id.optiontwo);
three = findViewById(R.id.optionthree);
four = findViewById(R.id.optionfour);
final Button nextquestion = findViewById(R.id.nextquestion);
rand();
nextquestion.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
submitoptionSelected();
}
});
reverseTimer(time, timer);
}
private void submitoptionSelected() {
int optid = 0;
final int teamid = getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0);
Log.d("teamid", "" + teamid);
if (one.isChecked()) {
optid = 1;
} else if (two.isChecked()) {
optid = 2;
} else if (three.isChecked()) {
optid = 3;
} else if (four.isChecked()) {
optid = 4;
}
final int finalOptid = optid;
final StringRequest stringRequest = new StringRequest(Request.Method.POST, Config.SUBMIT_OPTIONS_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if (response.equalsIgnoreCase("Success") || response.equalsIgnoreCase("Updated succesfully")) {
optionsgroup.clearCheck();
while (!flag) {
flag = true;
Log.d("randcall", "I am being called from options");
rand();
}
rand();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d("error", "" + error.getMessage());
}
})
{
@Override
protected Map<String, String> getParams() throws AuthFailureError {
final Map<String, String> selectedmap = new HashMap<>();
selectedmap.put(Config.KEY_ID, String.valueOf(teamid));
Log.d("ids", "" + teamid + " " + quesid);
selectedmap.put(Config.KEY_QUESTION_ID, String.valueOf(quesid));
selectedmap.put(Config.KEY_OPTION_ID, String.valueOf(finalOptid));
return selectedmap;
}
};
Volley.newRequestQueue(getApplicationContext()).add(stringRequest);
}
private void getImage(final int id, final String sendtype, final String sendlvl) {
final ProgressDialog progressDialog = ProgressDialog.show(Question.this, "PLease wait", "Loading");
progressDialog.show();
final StringRequest stringRequest = new StringRequest(Request.Method.POST, Config.IMAGE_QUESTIONS_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
progressDialog.dismiss();
Log.d("image", response);
try {
parseQuestionsResponse(response);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d("errorimage", "" + error.getMessage());
progressDialog.dismiss();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
final Map<String, String> map = new HashMap<>();
map.put(Config.KEY_ID, String.valueOf(id));
map.put(Config.KEY_TYPE, sendtype);
map.put(Config.KEY_LEVEL, sendlvl);
return map;
}
};
Volley.newRequestQueue(getApplicationContext()).add(stringRequest);
}
private void parseQuestionsResponse(String response) throws JSONException {
final JSONObject jsonObject = new JSONObject(response);
final JSONArray array = jsonObject.getJSONArray("questions");
int randnum;
int count = 0;
count++;
Log.d("callcount", "" + count + " " + " " + quesid + " " + array.length());
if (array.length() == 0) {
rand();
} else {
randnum = new Random().nextInt(array.length());
JSONObject quesobj = array.getJSONObject(randnum);
Log.d("old", "" + quesid);
Log.d("old1", "" + quesobj.getInt("QuesId"));
quesid = quesobj.getInt("QuesId");
Log.d("quesid", "" + quesid);
String ques = quesobj.getString("Question");
String purl = quesobj.getString("PhotoURL");
time = quesobj.getInt("Time");
questionTextView.setText(ques);
quesimage.setImageResource(getResources().getIdentifier("drawable/" + purl, null, getPackageName()));
getOptions();
}
}
private void getOptions() {
final ProgressDialog progressDialog = ProgressDialog.show(Question.this, "Loading", "Please wait");
progressDialog.show();
final Request.Priority priority = Request.Priority.HIGH;
final StringRequest optionsRequest = new StringRequest(Request.Method.POST, Config.OPTIONS_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
progressDialog.dismiss();
try {
parseOptions(response);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d("error", "" + error.getMessage());
progressDialog.dismiss();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
final Map<String, String> optionsmap = new HashMap<>();
optionsmap.put(Config.KEY_ID, String.valueOf(quesid));
return optionsmap;
}
@Override
public Priority getPriority() {
return priority;
}
};
Volley.newRequestQueue(getApplicationContext()).add(optionsRequest);
}
private void parseOptions(String response) throws JSONException {
final JSONObject optionsobj = new JSONObject(response);
final JSONArray jsonArray = optionsobj.getJSONArray("questions");
final JSONObject option1 = jsonArray.getJSONObject(0);
final JSONObject option2 = jsonArray.getJSONObject(1);
final JSONObject option3 = jsonArray.getJSONObject(2);
final JSONObject option4 = jsonArray.getJSONObject(3);
one.setText(option1.getString("question"));
two.setText(option2.getString("question"));
three.setText(option3.getString("question"));
four.setText(option4.getString("question"));
count++;
Log.d("fetch", "" + time);
reverseTimer(time, timer);
}
public void rand() {
Log.d("count", "" + count);
final Random rand = new Random();
if (count == 12) {
startActivity(new Intent(Question.this, MainActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
return;
}
final int qtype = rand.nextInt(4);
final int qlevel = rand.nextInt(3);
final String[] type = {"Image", "SQL", "DS", "CS"};
final String[] level = {"Easy", "Medium", "Hard"};
String sendtype;
String sendlvl;
switch (qtype) {
case 0:
switch (qlevel) {
case 0: {
if (arr[0][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[0][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
case 1: {
if (arr[1][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[1][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
case 2:
{
if (arr[2][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[2][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
}
break;
case 1:
switch (qlevel) {
case 0: {
if (arr[3][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[3][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
case 1:
{
if (arr[4][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[4][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
case 2:
{
if (arr[5][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[5][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
}
break;
case 2:
switch (qlevel) {
case 0:
if (arr[6][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[6][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
case 1:
if (arr[7][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[7][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
case 2:
if (arr[8][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[8][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
break;
case 3:
switch (qlevel) {
case 0:
if (arr[9][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[9][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
case 1:
if (arr[10][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[10][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
case 2:
if (arr[11][2] > 0) {
sendtype = type[qtype];
sendlvl = level[qlevel];
arr[11][2]--;
getImage(getSharedPreferences(Config.Shared_ID_PREF, MODE_PRIVATE).getInt(Config.KEY_ID, 0), sendtype, sendlvl);
break;
} else {
flag = false;
return;
}
}
break;
}
}
@Override
public void onBackPressed() {
final AlertDialog.Builder builder = new AlertDialog.Builder(Question.this);
builder.setMessage("Are you sure to exit?");
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
System.exit(0);
}
});
final AlertDialog dialog = builder.create();
dialog.show();
}
public void reverseTimer(int Seconds, final TextView tv) {
new CountDownTimer(Seconds * 1000 + 1000, 1000) {
public void onTick(long millisUntilFinished) {
int seconds = (int) (millisUntilFinished / 1000);
int minutes = seconds / 60;
seconds = seconds % 60;
tv.setText("TIME : " + String.format("%02d", minutes)
+ ":" + String.format("%02d", seconds));
}
public void onFinish() {
submitoptionSelected();
rand();
}
}.start();
}
}