please i am having some issues parsing a list of data form the this link( https://gnews.io/api/v3/top-news?&token=dd21eb88599ccb3411eaad9b314cde23 ) i am able to get the data from the json array(articles) but how can i get the data from the josn array(sources)
private void getWebApiData() {
String WebDataUrl = "https://gnews.io/api/v3/top-news?&token=dd21eb88599ccb3411eaad9b314cde23";
new AsyncHttpTask.execute(WebDataUrl);
}
@SuppressLint("StaticFieldLeak")
public class AsyncHttpTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
String result = "";
URL url;
HttpsURLConnection urlConnection = null;
try {
url = new URL(urls[0]);
urlConnection = (HttpsURLConnection) url.openConnection();
if (result != null) {
String response = streamToString(urlConnection.getInputStream());
parseResult(response);
return result;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
if (result != null) {
newsAdapter = new NewsAdapter(getActivity(), newsClassList);
listView.setAdapter(newsAdapter);
Toast.makeText(getContext(), "Data Loaded Successfully", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getContext(), "Failed to load data!", Toast.LENGTH_SHORT).show();
}
progressBar.setVisibility(View.GONE);
}
}
private String streamToString(InputStream stream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
String line;
String result = "";
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
// Close stream
if (null != stream) {
stream.close();
}
return result;
}
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONObject response2 = response.getJSONObject("articles");
NewsClass newsClass;
for (int i = 0; i < newsClass.length(); i++) {
JSONObject post = newsClass.optJSONObject(i);
String name = post.optString("name");
newsClass = new newsClass();
newsClass.setNews_Name(name);
artistClassList.add(newsClass);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
This is code I am using the get the data of the articles. To get the sources I have tried
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONObject response2 = response.getJSONArray("articles");
JSONObject response3 = response2.getJSONObject("sources");
NewsClass newsClass;
for (int i = 0; i < newsClass.length(); i++) {
JSONObject post = newsClass.optJSONObject(i);
String name = post.optString("name");
newsClass = new newsClass();
newsClass.setNews_Name(name);
artistClassList.add(newsClass);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
But I think I am not getting the code correctly
Here is the second option I have tried
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONObject response = response2.getJSONObject("sources");
NewsClass newsClass;
for (int i = 0; i < newsClass.length(); i++) {
JSONObject post = newsClass.optJSONObject(i);
String name = post.optString("name");
newsClass = new newsClass();
newsClass.setNews_Name(name);
artistClassList.add(newsClass);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
But this only gives me empty text Fields the spaces for the data is populated but it is blank Please any help will be greatly appreciated
I don't know how your code works. You have tried to get JSONObject
as articles which is actually JSONArray
. Besides this I don't find any key in your json
like sources instead I have found source . To parse source try below way:
try {
JSONObject jsonObject = new JSONObject(result);
JSONArray jsonArray = jsonObject.getJSONArray("articles");
for(int i = 0; i < jsonArray.length(); i++) {
JSONObject articleObject = jsonArray.getJSONObject(i);
JSONObject sourceObject = articleObject.getJSONObject("source");
String name = sourceObject.optString("name");
String url = sourceObject.optString("url");
}
} catch (JSONException e) {
e.printStackTrace();
}
As Md. Asaduzzaman stated it is actually an JSON array ("articles" to be exact).
I have tested it on my phone and it works no prob. You will have to try and figure out how u want the JSONArray to be parsed thou.
private class AsyncTaskExample extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
}
@Override
protected String doInBackground(String... strings) {
try {
stringURL = new URL(strings[0]);
HttpURLConnection conn = (HttpURLConnection) stringURL.openConnection();
conn.setDoInput(true);
conn.connect();
is = conn.getInputStream();
//render string stream
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(is));
String line;
String result = "";
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
// Close stream
if (null != is) {
is.close();
}
return result;
} catch (IOException e) {
e.printStackTrace();
}
return str;
}
@Override
protected void onPostExecute(String js) {
super.onPostExecute(js);
try {
JSONObject jay = new JSONObject (js);
JSONObject source = jay.getJSONObject("articles");
String s = source.getString("title");
System.out.println(s);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
Here you will find all you need for JSON .
Best of luck to you :)
JSONObject jsonObject = new JSONObject(response.body().string());
JSONArray articles = jsonObject.getJSONArray("articles");
for(int i=0; i<articles.length(); i++){
JSONObject obj1 = (JSONObject) articles.get(i);
JSONObject source = obj1.getJSONObject("source");
Log.i(TAG, "onResponse: " + source.toString()); }
Hope that help you !
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