I am making a small quiz app. There are 3 categories and every category has 3 questions (9 questions). I use
GridView, Adapters and Loaders. Now on Activity I call first question of every category. On adapter There are
TextView for quesion, 4 Radiobuttons for answers and a Button for Next question. I read many topics and
tutorials about quiz, query, RadioGroup and RadioButtons. When i press Button question must change to another question but I even can't solve RadioButon's getCheckedRadioButtonId. It's always throwing error. Please help me, show me where is my mistake. I stopped here. At least 7 days passed when i come face to face with this problem. I myself can't solve this problem. Dear professionals please help me, show me some codes and point me to right way. Thanks very much.
DB
QuestionLoader
QuestionAdapter
and my tries to write getCheckedRadioButtonId and query
Please help me to write my code. Please point me to right way. Thanks very much.
GridView, Adapters and Loaders. Now on Activity I call first question of every category. On adapter There are
TextView for quesion, 4 Radiobuttons for answers and a Button for Next question. I read many topics and
tutorials about quiz, query, RadioGroup and RadioButtons. When i press Button question must change to another question but I even can't solve RadioButon's getCheckedRadioButtonId. It's always throwing error. Please help me, show me where is my mistake. I stopped here. At least 7 days passed when i come face to face with this problem. I myself can't solve this problem. Dear professionals please help me, show me some codes and point me to right way. Thanks very much.
DB
Code:
public List<HashMap<String, Category>> allCat(Context context){
SQLiteDatabase db = this.getReadableDatabase();
List<HashMap<String, Category>> list = new ArrayList<HashMap<String, Category>>();
String s = "select * from category";
Cursor cursor = db.rawQuery(s, null);
int count = 0;
if (cursor.moveToFirst()){
do {
Resources resources = context.getResources();
HashMap<String, Category> hm = new HashMap<String, Category>();
hm.put("category", new Category(cursor.getInt(1), resources.getIdentifier(context.getPackageName()
+ ":drawable/" +
cursor.getString(cursor.getColumnIndex("image")), null, null), cursor.getString(2)));
list.add(hm);
count ++;
}
while (cursor.moveToNext());
}
db.close();
return list;
}
public List<Questions> allQuestions(int id){
SQLiteDatabase db = this.getReadableDatabase();
List<Questions> questionses = new ArrayList<Questions>();
String st = "select * from matem where category_id=" + id;
Cursor cursor = db.rawQuery(st, null);
if (cursor.moveToFirst()){
do { Questions questions = new Questions(cursor.getInt(0),
cursor.getString(1), cursor.getString(2),
cursor.getString(3), cursor.getString(4),
cursor.getString(5), cursor.getString(6),
cursor.getString(7), cursor.getInt(8), cursor.getInt(9));
questionses.add(questions);
}while (cursor.moveToNext());
}
db.close();
return questionses;
}QuestionLoader
Code:
public class QuestionsLoaders extends AsyncTaskLoader<List<Questions>>{
public int id;
public QuestionsLoaders(Context context, int id) {
super(context);
this.id=id;
}
@Override
public List<Questions> loadInBackground() {
return new DbHelper(getContext()).allQuestions(id);
}QuestionAdapter
Code:
public class QuestionsAdapter extends BaseAdapter{
Context context;
LayoutInflater inflater;
DbHelper dbHelper;
Button btn_next;
RadioGroup radioGroup;
RadioButton rb,radAns1,radAns2,radAns3,radAns4;;
List<Questions> questionsList;
int nextQ = 0;
int score = 0;
int qid = 0;
public QuestionsAdapter() {
}
public QuestionsAdapter(Context context, List<Questions> questionsList) {
if (questionsList != null) {
this.questionsList = questionsList;
this.context = context;
inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
dbHelper = new DbHelper(this.context);
}
}
@Override
public int getCount() {
return questionsList.size();
}
@Override
public Object getItem(int position) {
return questionsList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final View view = inflater.inflate(R.layout.question_list, null);
final Questions questions = questionsList.get(position);
btn_next = (Button) view.findViewById(R.id.btn_next);
final TextView question = (TextView) view.findViewById(R.id.textQuestion);
question.setText(questions.getVopros());
final RadioButton radAns1 = (RadioButton) view.findViewById(R.id.radAns1);
radAns1.setText(questions.getAns_1());
final RadioButton radAns2 = (RadioButton) view.findViewById(R.id.radAns2);
radAns2.setText(questions.getAns_2());
final RadioButton radAns3 = (RadioButton) view.findViewById(R.id.radAns3);
radAns3.setText(questions.getAns_3());
final RadioButton radAns4 = (RadioButton) view.findViewById(R.id.radAns4);
radAns4.setText(questions.getAns_4());
final TextView textAns = (TextView) view.findViewById(R.id.textAns);
textAns.setText("Right answer:" + questions.getAns_r());
radioGroup = (RadioGroup)view.findViewById(R.id.radioGroup);
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == radAns1.getId()){
Toast.makeText(view.getContext().getApplicationContext(), "Checked id: " + radAns1.getId(),
Toast.LENGTH_SHORT).show();
}else if (checkedId == radAns2.getId()){
Toast.makeText(view.getContext().getApplicationContext(), "Checked id: " + radAns2.getId(),
Toast.LENGTH_SHORT).show();
}else if (checkedId == radAns3.getId()){
Toast.makeText(view.getContext().getApplicationContext(), "Checked id: " + radAns3.getId(),
Toast.LENGTH_SHORT).show();
}else if (checkedId == radAns4.getId()){
Toast.makeText(view.getContext().getApplicationContext(), "Checked id: " + radAns4.getId(),
Toast.LENGTH_SHORT).show();
}
}
});
btn_next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
radioGroup = (RadioGroup)v.findViewById(R.id.radioGroup);
int selectedId = radioGroup.getCheckedRadioButtonId();
rb = (RadioButton)v.findViewById(selectedId);
// radioGroup.setOnCheckedChangeListener();
}
});
return view;
}and my tries to write getCheckedRadioButtonId and query
Code:
// btn_next.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// RadioGroup radioGroup = (RadioGroup) v.findViewById(R.id.radioGroup);
// int checkedRadioButton = radioGroup.getCheckedRadioButtonId();
//
// String radioButtonSelected = "";
//
// switch (checkedRadioButton) {
// case R.id.radAns1:
// radioButtonSelected = "radiobutton1";
// break;
// case R.id.radAns2:
// radioButtonSelected = "radiobutton2";
// break;
// case R.id.radAns3:
// radioButtonSelected = "radiobutton3";
// break;
// case R.id.radAns4:
// radioButtonSelected = "radiobutton4";
// }
// }
// });
// btn_next = (Button) view.findViewById(R.id.btn_next);
// btn_next.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// RadioGroup radioGroup = (RadioGroup) v.findViewById(R.id.radioGroup);
// int checkedRadioButton = radioGroup.getCheckedRadioButtonId();
//
// String radioButtonSelected = "";
//
// switch (checkedRadioButton) {
// case R.id.radAns1 : radioButtonSelected = "radiobutton1";
// break;
// case R.id.radAns2 : radioButtonSelected = "radiobutton2";
// break;
// case R.id.radAns3 : radioButtonSelected = "radiobutton3";
// break;
// case R.id.radAns4 : radioButtonSelected = "radiobutton4";
// }
// radioGroup = (RadioGroup)v.findViewById(R.id.radioGroup);
// int selectedId = radioGroup.getCheckedRadioButtonId();
// rb = (RadioButton)v.findViewById(selectedId);
// Toast.makeText(v.getContext(), "Checked id: " + rb.getId(), Toast.LENGTH_SHORT).show();
// RadioButton rb = (RadioButton) v.findViewById(radioGroup.getCheckedRadioButtonId());
//
// int selectId=radioGroup.getCheckedRadioButtonId();
// RadioButton selected = (RadioButton)v.findViewById(selectId);
// String selected_user = selected.getText().toString();
// final RadioGroup radioGroup = (RadioGroup)v.findViewById(R.id.radioGroup);
// int id=radioGroup.getCheckedRadioButtonId();
// RadioButton selectedRedioButton = (RadioButton) v.findViewById(id);
// Toast.makeText(v.getContext(), "You have selected "+selected_user.toString(),
Toast.LENGTH_LONG).show();
// int selectedId = radioGroup.getCheckedRadioButtonId();
// rb = (RadioButton)v.findViewById(selectedId);
// if (selectedId == radAns1.getId()){
// Toast.makeText(v.getContext().getApplicationContext(), "Checked id: " + radAns1.getId(),
Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns2.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns2.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns3.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns3.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns4.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns4.getId(), Toast.LENGTH_SHORT).show();
// }
// Toast.makeText(v.getContext(), "Checked id: Salom", Toast.LENGTH_SHORT).show();
// int selectedId = radioGroup.getCheckedRadioButtonId();
// if (selectedId == radAns1.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns1.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns2.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns2.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns3.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns3.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns4.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns4.getId(), Toast.LENGTH_SHORT).show();
// }
// }
// });
// @Override
// public void onClick(View v) {
// int selectedId = radioGroup.getCheckedRadioButtonId();
// if (selectedId == radAns1.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns1.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns2.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns2.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns3.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns3.getId(), Toast.LENGTH_SHORT).show();
// }else if (selectedId == radAns4.getId()){
// Toast.makeText(v.getContext(), "Checked id: " + radAns4.getId(), Toast.LENGTH_SHORT).show();
// }
// Questions questions = new Questions();
// RadioButton rb = (RadioButton) v.findViewById(radioGroup.getCheckedRadioButtonId());
// int sav2 = 1;
// Vars vars = new Vars();
// dbHelper.allQuestions(sav2);
// dbHelper.rowcount(sav2);
// RadioGroup rg = (RadioGroup)v.findViewById(R.id.radioGroup);
// String radiovalue = ((RadioButton)v.findViewById(rg.getCheckedRadioButtonId())).getText().toString();
// int radioButtonID = radioButtonGroup.getCheckedRadioButtonId();
// View radioButton = radioButtonGroup.findViewById(radioButtonID);
// int idx = radioButtonGroup.indexOfChild(radioButton);
// int id = radioGroup.getCheckedRadioButtonId();
// if (id == -1){
// //no item selected
// }
// else{
// if (id == R.id.radio_button1){
// //Do something with the button
// }
// }
// if(rg1.getCheckedRadioButtonId()!=-1){
// int id= rg1.getCheckedRadioButtonId();
// View radioButton = rg1.findViewById(id);
// int radioId = radioGroup.indexOfChild(radioButton);
// RadioButton btn = (RadioButton) rg1.getChildAt(radioId);
// String selection = (String) btn.getText();
// }Please help me to write my code. Please point me to right way. Thanks very much.