Android- Parsing Local JSON Data (assets folder)

Question

I am making a test app with Android. I have a json file and i want to read it into activity class. Here is the json file. Wrote the code but the code doesn't recognize "question" variable i described upside.

 { "questions": [ { "id": "a200", "question": "lorem ipsum dolor _______ amet", "optionA": "lorem", "optionB": "ipsum", "optionC" : "dolor", "optionD": "sit" "rightAnswer" : "sit" }, { "id": "b200", "question": "_____ ipsum dolor sit amet", "optionA": "lorem", "optionB": "ipsum", "optionC" : "dolor", "optionD": "sit" "rightAnswer" : "lorem" }, { "id": "c200", "question": "lorem _____ dolor sit amet", "optionA": "lorem", "optionB": "ipsum", "optionC" : "dolor", "optionD": "sit" "rightAnswer" : "ipsum" }, ] } 

And here is my QuizActivityAdjectives.java file's onCreate part.

 public class QuizActivityAdjectives extends Activity { TextView txt_questionAdjective; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_quiz_adjectives); // Hangi xml dosyasının dikkate alınacağı belirlendi. // Reading json file from assets folder StringBuffer sb = new StringBuffer(); BufferedReader br = null; try { br = new BufferedReader(new InputStreamReader(getAssets().open( "Questions.json"))); String temp; while ((temp = br.readLine()) != null) sb.append(temp); } catch (IOException e) { e.printStackTrace(); } finally { try { br.close(); // stop reading } catch (IOException e) { e.printStackTrace(); } } // Try to parse JSON try { // Creating JSONObject from String JSONObject jsonObjMain = new JSONObject(); // Creating JSONArray from JSONObject JSONArray jsonArray = jsonObjMain.getJSONArray("questions"); // JSONArray has four JSONObject for (int i = 0; i < jsonArray.length(); i++) { // Creating JSONObject from JSONArray JSONObject jsonObj = jsonArray.getJSONObject(i); // Getting data from individual JSONObject int id = jsonObj.getInt("id"); String question = jsonObj.getString("question"); String optionA = jsonObj.getString("optionA"); String optionB = jsonObj.getString("optionB"); String optionC = jsonObj.getString("optionC"); String optionD = jsonObj.getString("optionD"); String rightAnswer = jsonObj.getString("rightAnswer"); } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } String myjsonstring = sb.toString(); txt_questionAdjective = (TextView) findViewById(R.id.txt_questionAdjective); txt_questionAdjective.setText(question); //THE CODE ERRORS HERE. CAN NOT RESOLVE QUESTION VARIABLE. } 

How can i get rid of that matter? And is the code this way making any sense? Will it work ?

The error : "question cannot be resolved to a variable" (The comment line i wrote at the bottom)

---

EDIT:SOLVED I wouldn't ever expect but after correcting json file (there should've been a comma which i'ven't noticed, i was gotta change the id value which have been described as int and given in the json file with a char (like a200). After that the problem was gone and the json was fetched.

Answer 1

You create a new JSONObject, instead of parsing your file:

JSONObject jsonObjMain = new JSONObject();

should be:

JSONObject jsonObjMain = new JSONObject(sb.toString());

Edit:

Now I understood your question.

You are out of scope and variable question doesn't exist anymore. Furthermore there are multiple questions , how do you expect to set it to your TextView ?

You can save questions into an array and use any of them like this:

List<String> questions = new ArrayList<>();

try {
    ...
    for (int i = 0; i < jsonArray.length(); i++) {
        ...
        questions.add(jsonObj.getString("question"));
        ...
    }

} catch (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

String myjsonstring = sb.toString();

// Check if questions have been fetched
if (questions.size() > 0) {
    txt_questionAdjective = (TextView) findViewById(R.id.txt_questionAdjective);
    // Use the first question
    txt_questionAdjective.setText(questions.get(0));
}