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Data is not fetched through JSON parsing

Data is not fetched through json parsing. I want to fetch data from url and just set it to a textview. please help
private static final String URL_PRODUCTS = "http://ebeautyapp.com/experts/getContactUs.php";
//method for json parcing
private void loadData() {
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL_PRODUCTS,
new Response.Listener < String > () {
#Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
String result = jObj.getString("result");
if (result.equals("success")) {
JSONArray jsonArray = jObj.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String contact_id = jsonObject.getString("contact_id");
String fullname = jsonObject.getString("fullname");
String moble1 = jsonObject.getString("moble1");
String mobileno2 = jsonObject.getString("mobileno2");
String profile_pic = jsonObject.getString("profile_pic");
String address = jsonObject.getString("address");
String about_us = jsonObject.getString("about_us");
fulllnames.setText(fullname);
mobilenos.setText(moble1);
}
} else {
String status = jObj.getString("status");
Toast.makeText(getApplicationContext(), "" + status, Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
//adding our stringrequest to queue
Volley.newRequestQueue(this).add(stringRequest);
}

Using this I have got the response from the server. Hope this will solve your problem.
class RetrieveFeedTask extends AsyncTask<Void, Void, String> {
protected void onPreExecute() {
// responseView.setText("");
}
protected String doInBackground(Void... urls) {
String API_URL = "http://ebeautyapp.com/experts/getContactUs.php";
// Do some validation here
try {
URL url = new URL(API_URL);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
bufferedReader.close();
return stringBuilder.toString();
}
finally{
urlConnection.disconnect();
}
}
catch(Exception e) {
Log.e("ERROR", e.getMessage(), e);
return null;
}
}
protected void onPostExecute(String response) {
if(response == null) {
response = "THERE WAS AN ERROR";
}
// progressBar.setVisibility(View.GONE);
Log.i("INFO", response);
// responseView.setText(response);
// parseJsonData(response);
}
JSON parsing
private void jsonParsing(String response){
try {
JSONObject jObj = new JSONObject(response);
String result = jObj.getString("result");
if (result.equals("success")) {
JSONArray jsonArray = jObj.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String contact_id = jsonObject.getString("contact_id");
String fullname = jsonObject.getString("fullname");
String moble1 = jsonObject.getString("moble1");
String mobileno2 = jsonObject.getString("mobileno2");
String profile_pic = jsonObject.getString("profile_pic");
String address = jsonObject.getString("address");
String about_us = jsonObject.getString("about_us");
fulllnames.setText(fullname);
mobilenos.setText(moble1);
}
} else {
String status = jObj.getString("status");
Toast.makeText(getApplicationContext(), "" + status, Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
And use this task as simple by using this
new RetrieveFeedTask().execute();

how to add OnScrollListener in my below code

It's been a while since I have been using android. can you please tell me how to add OnScrollListener in this code ? Everytime I scroll down I want to fetch 5 more images.
This is the Asyncatask its working correct, but I need fetch 5 image everytime I scroll down(load more).
public class RecyclerOkHttpHandler extends AsyncTask<String, Void, String> {
private Context mContext;
private MyInterface mListener;
public String category;
public String basestart;
public String limitend;
public RecyclerOkHttpHandler(Context context, MyInterface mListener, String categ, String base, String limit){
mContext = context;
this.mListener = mListener;
category=categ;
basestart=base;
limitend=limit;
}
public interface MyInterface {
public void myMethod(ArrayList result);
}
private final String Fetch_URL = "http://justedhak.com/old-files/Recyclerview_data.php";
// ArrayList<Listitem> Listitem;
ArrayList<CategoryList> Listitem;
int resulta;
OkHttpClient httpClient = new OkHttpClient();
ListView list;
String myJSON;
JSONArray peoples = null;
InputStream inputStream = null;
#Override
protected String doInBackground(String... params) {
Log.d("okhttp Fetch_URL", Fetch_URL);
RequestBody formBody = new FormEncodingBuilder()
.add("category", category)
.add("base", basestart)
.add("limit", limitend)
.build();
Request request = new Request.Builder()
.url(Fetch_URL)
.post(formBody)
.build();
String result = null;
try {
Response response = httpClient.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
inputStream = response.body().byteStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
resulta = 1; //"Success
// return response.body().bytes();
} catch (Exception e) {
Toast.makeText(mContext, "Connection failed, check your connection",
Toast.LENGTH_LONG).show();
e.printStackTrace(); }
finally {
try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
}
return result;
}
#Override
protected void onPostExecute(String result){
if( resulta ==1){
myJSON=result;
Log.e("result",result);
showList();
}
else{
Log.e("d","there is an error on postexecute in okhhttphandler.java");
}
}
protected void showList(){
try {
JSONObject jsonObj = new JSONObject(myJSON);
peoples = jsonObj.getJSONArray("result");
System.out.println("Length:"+peoples.length());
int J_length=peoples.length()-1;
//JSONObject maxj = peoples.getJSONObject(peoples.length() - 1);
// max of arrray
jsonObj= peoples.getJSONObject(J_length);
String j_id= jsonObj.getString("id");
int _id = Integer.parseInt(j_id);
System.out.println(j_id);
//max of
DatabaseHandler db = new DatabaseHandler(mContext);
String db_id="";
db_id = db.getmax();
if (db_id== null)
{
db_id="0";
}
int d_id = Integer.parseInt(db_id);
Log.e("db_id", db_id);
Log.e("j_id",j_id);
// if (_id < d_id) {
System.out.println("Getting json result ");
Listitem = new ArrayList<CategoryList>();
for (int i = 0; i < peoples.length(); i++) {
JSONObject c = peoples.getJSONObject(i);
String id = c.getString("id");
String url = c.getString("url");
Listitem.add(new CategoryList(id, url));
}
if (mListener != null)
mListener.myMethod(Listitem);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
This is the when I set the adapter
private String base = "0";
private String limit = "5";
final RecyclerOkHttpHandler handler = new RecyclerOkHttpHandler( this, new RecyclerOkHttpHandler.MyInterface() {
#Override
public void myMethod(ArrayList result) {
mAdapter_first = new MyAdapter(result,SearchActivity.this);
mAdapter_first.notifyDataSetChanged();
mRecyclerView_first.setAdapter(mAdapter_first);
}
},"girls jokes",base,limit);
try {
handler.execute().get();
} catch (Exception e) {
Log.d("SearchActivity error", "error in mRecyclerView_first");
e.printStackTrace();
}

For the first load, call your RecyclerOkHttpHandler AsyncTaskto get your first 5 items.
Now, for any further load, all you have to do is to check if the listView is scrolled to its bottom and you can refer to this link Find out if ListView is scrolled to the bottom? to know how to deal with it.
So, each time you detect that the user has scrolled the listview to the bottom, it's time to call the RecyclerOkHttpHandler AsynTask to get the 5 new images.
PS: You need to save the limit you have reached in each load, so that in the next load, you start loading from that limit.
Hope this helps :)

When added JSONObject method, Limited Json in Android

I want develop android application for one website. I read website posts from json and show its in RecyclerView every 10 posts.
But i have strange problem! when added this line in my codes, json and RecyclerView has limited and show 5 post instance of 10 posts!
code :
JSONObject imagesPair=images.getJSONObject("martial-frontpage-blog");
when added this line limited for 5 post, when delete this line it's ok and show 10 posts!
Json Link: Json link
AsyncTask codes:
public class MainDataInfo {
private Context mContext;
private String ServerAddress = ServerIP.getIP();
public void getMainDataInfo(Context context) {
mContext = context;
new getInfo().execute(ServerAddress + "page=1");
}
private class getInfo extends AsyncTask<String, Void, String> {
EventBus bus = EventBus.getDefault();
private String ou_response;
private List<MainDataModel> infoModels;
#Override
protected void onPreExecute() {
CustomProcessDialog.createAndShow(mContext);
infoModels = new ArrayList<>();
}
#Override
protected String doInBackground(String... params) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(ServerAddress + "page=1")
.build();
Response response;
try {
response = client.newCall(request).execute();
ou_response = response.body().string();
response.body().close();
if (ou_response != null) {
try {
JSONObject postObj = new JSONObject(ou_response);
JSONArray postsArray = postObj.getJSONArray("posts");
infoModels = new ArrayList<>();
for (int i = 0; i <= infoModels.size(); i++) {
JSONObject postObject = (JSONObject) postsArray.get(i);
int id = postObject.getInt("id");
String title = postObject.getString("title");
Log.d("Data", "Post id: " + id);
Log.d("Data", "Post title: " + title);
JSONObject images=postObject.getJSONObject("thumbnail_images");
JSONObject imagesPair=images.getJSONObject("martial-frontpage-blog");
//Use the title and id as per your requirement
infoModels.add(new MainDataModel(
postObject.getInt("id"),
postObject.getString("title"),
postObject.getString("content"),
postObject.getString("thumbnail")));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (IOException e) {
e.printStackTrace();
}
return ou_response;
}
#Override
protected void onPostExecute(String result) {
CustomProcessDialog.dissmis();
if (result != null) {
bus.post(infoModels);
}
}
}
}
How can i fix this problem and when added above code, show 10 posts and run success application ? Thanks

how to use Gson here
first, add in your build.gradle this
dependencies {
compile 'com.google.code.gson:gson:2.4'
//your all other dependencies
}
second, create class PostsResponse and write in it
package your.package.here;
import android.text.TextUtils;
import com.google.gson.annotations.SerializedName;
import java.util.ArrayList;
public class PostsResponse {
private static final String DEFAULT_IMAGE_URL = "put your default image url here";
public static class Post {
#SerializedName("id")
private int mId;
#SerializedName("title")
private String mTitle;
#SerializedName("content")
private String mContent;
#SerializedName("thumbnail")
private String mThumbnail;
#SerializedName("thumbnail_images")
private Images mImages;
public static class Images {
#SerializedName("martial-frontpage-blog")
private String mMartialFrontpageBlogUrl;
public String getMartialFrontpageBlogImage() {
return TextUtils.isEmpty(mMartialFrontpageBlogUrl) ?
DEFAULT_IMAGE_URL :
mMartialFrontpageBlogUrl;
}
}
public int getId() {
return mId;
}
public String getTitle() {
return mTitle;
}
public String getContent() {
return mContent;
}
public String getThumbnail() {
return mThumbnail;
}
public String getMartialFrontpageBlogImage() {
return mImages.getMartialFrontpageBlogImage();
}
}
#SerializedName("posts")
private ArrayList<Post> mPosts;
public ArrayList<Post> getPosts() {
return mPosts;
}
}
and change part of your MainDataInfo from
if (ou_response != null) {
try {
JSONObject postObj = new JSONObject(ou_response);
JSONArray postsArray = postObj.getJSONArray("posts");
infoModels = new ArrayList<>();
for (int i = 0; i <= infoModels.size(); i++) {
JSONObject postObject = (JSONObject) postsArray.get(i);
int id = postObject.getInt("id");
String title = postObject.getString("title");
Log.d("Data", "Post id: " + id);
Log.d("Data", "Post title: " + title);
JSONObject images=postObject.getJSONObject("thumbnail_images");
JSONObject imagesPair=images.getJSONObject("martial-frontpage-blog");
//Use the title and id as per your requirement
infoModels.add(new MainDataModel(
postObject.getInt("id"),
postObject.getString("title"),
postObject.getString("content"),
postObject.getString("thumbnail")));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
to this new one
if (!TextUtils.isEmpty(ou_response)) {
try {
PostsResponse postsResponse = new Gson().fromJson(ou_response, PostsResponse.class);
infoModels = new ArrayList<>();
for (PostsResponse.Post post : postsResponse.getPosts()) {
infoModels.add(new MainDataModel(
post.getId(),
post.getTitle(),
post.getContent(),
post.getThumbnail())
);
//// TODO: 26.04.16 use post.getMartialFrontpageBlogImage()
//// as you want here
}
} catch (JSONException e) {
e.printStackTrace();
}
}
don't forget to properly fill DEFAULT_IMAGE_URL and package
and see TODO section
feel free to add new fields to Post class and provide getters for them
THE END )

"post" with index 5 in your server response has no "martial-frontpage-blog" in "thumbnail_images", so your parsing cycle simply stops and drops exception.
to fix it - use optJSONObject();imagesPair = images.optJSONObject("..."); and check it for null

one else moment )
fix your cycle from for (int i = 0; i <= infoModels.size(); i++) {
to for (int i = 0; i < postsArray.length(); i++) {
in your current realization cycle stops work by exception )

How to show other Json objects in RecylerView on Android

I want develop android application for one website. I read website posts from json and show its in RecyclerView every 10 posts.
I can show title, description and thumbnail. but i want show medium from thumbnail_images instance of thumbnail. I don't know how to read images from medium ?!
My Json Link : Link
AsyncTaskCodes:
public class MainDataInfo {
private Context mContext;
private String ServerAddress = ServerIP.getIP();
public void getMainDataInfo(Context context) {
mContext = context;
new getInfo().execute(ServerAddress + "page=1");
}
private class getInfo extends AsyncTask<String, Void, String> {
EventBus bus = EventBus.getDefault();
private String ou_response;
private List<MainDataModel> infoModels;
#Override
protected void onPreExecute() {
CustomProcessDialog.createAndShow(mContext);
infoModels = new ArrayList<>();
}
#Override
protected String doInBackground(String... params) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(ServerAddress + "page=1")
.build();
Response response;
try {
response = client.newCall(request).execute();
ou_response = response.body().string();
response.body().close();
if (ou_response != null) {
try {
JSONObject postObj = new JSONObject(ou_response);
JSONArray postsArray = postObj.getJSONArray("posts");
infoModels = new ArrayList<>();
for (int i = 0; i <= infoModels.size(); i++) {
JSONObject postObject = (JSONObject) postsArray.get(i);
int id = postObject.getInt("id");
String title = postObject.getString("title");
//get other data
JSONObject imageObj = postObject.getJSONObject("thumbnail_images");
JSONObject mediumObj = imageObj.optJSONObject("medium");
String mediumImage = mediumObj.getString("url");
Log.d("Data", "Post id: " + id);
Log.d("Data", "Post title: " + title);
//Use the title and id as per your requirement
infoModels.add(new MainDataModel(
postObject.getInt("id"),
postObject.getString("title"),
postObject.getString("content"),
postObject.getString(mediumImage)));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (IOException e) {
e.printStackTrace();
}
return ou_response;
}
#Override
protected void onPostExecute(String result) {
CustomProcessDialog.dissmis();
if (result != null) {
bus.post(infoModels);
}
}
}
}
for fetch medium image i use this code :
//get other data
JSONObject imageObj = postObject.getJSONObject("thumbnail_images");
JSONObject mediumObj = imageObj.optJSONObject("medium");
String mediumImage = mediumObj.getString("url");
but when set mediumImage for infoModels.add(new MainDataModel() not show me any posts!
How can set images from medium ? thanks all <3

private void setImageWithPicaso(String imageUrl) {
if (!(imageUrl == null)) {
Picasso.with(getActivity()).load(imageUrl).placeholder(R.drawable.placeholder_background).into(imageView, new Callback() {
#Override
public void onSuccess() {
//On Success
}
#Override
public void onError() {
spinner.setVisibility(View.GONE);
//On Error
}
});
} else {
spinner.setVisibility(View.GONE);
//On Error
}
}

Stop creating fragmnet view until i have parsed all data from Json.

I receive a null pointer exeception when trying to populate the interface beacuse I have no data in my instance object.
I am using a login button and call a service, i receive a json and after I parse it i have a status handler...login ok... Here I want to start an asynk task to get some photo data
public void StatusHandlerLogin(String status, Activity currentActivity) {
if (status.equals("0")) {
new GetPhotoDataTask(currentActivity).execute();
Intent intent = new Intent(currentActivity,
NavigationActivity.class);
currentActivity.startActivity(intent);
}
//}
The asynk task is like this
public class GetPhotoDataTask extends
AsyncTask<Void, Void, List<PhotoData>> {
Activity activity;
public GetPhotoDataTask(Activity activity) {
this.activity = activity;
}
ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
Log.d("GetPhotoDataTask onPreExecute",
"GetPhotoDataTask onPreExecute");
super.onPreExecute();
progressDialog = ProgressDialog.show(activity, "Preluare Date",
"Va rugam asteptati!");
}
#Override
protected List<PhotoData> doInBackground(Void... params) {
Log.d("GetPhotoDataTask doInBackground",
"GetPhotoDataTask doInBackground");
MyStyleApi myStyleApi = new MyStyleApi();
List<PhotoData> photoData = null;
try {
photoData = myStyleApi.getPhotoDataWithDispatch();
} catch (JSONException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
List<String> photoStr = new ArrayList<String>();
for (int i = 0; i < photoData.size(); i++) {
photoStr.add(photoData.get(i).getPhotoURL());
}
String[] photoUrls = new String[photoStr.size()];
photoUrls = photoStr.toArray(photoUrls);
for (int i = 0; i < photoUrls.length; i++) {
if (photoUrls[i].contains("\"")) {
photoUrls[i] = photoUrls[i].replace("\"", "");
}
}
AppManager.getInstance().setphotoUrls(photoUrls);
List<PhotoData> photoDataS = AppManager.getInstance().setPhotoData(
photoData);
return photoData;
}
protected void onProgressUpdate(Integer... percent) {
progressDialog = ProgressDialog.show(activity, "Preluare Date",
"Va rugam asteptati!");
}
protected void onPostExecute(List<PhotoData> photoData) {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
}
}
on do in background i have a method that call other service
get PhotoData with userId as param
public List<PhotoData> getPhotoDataWithDispatch() throws JSONException,
ClientProtocolException, IOException {
Log.d("getPhotoDataWithDispatch ", "getPhotoDataWithDispatch ");
UserData data = AppManager.getInstance().getUserData();
String userID = data.getUserID();
if (userID.contains("\"")) {
userID = userID.replace("\"", "");
}
Map<String, Object> params = new LinkedHashMap<String, Object>();
params.put("userID", userID);
JsonArray response = WebServiceApi.PostToServiceWithStringResponse(
"images/get_images_data", params);
List<PhotoData> photoDataList = new ArrayList<PhotoData>();
if (response != null) {
photoDataList = parseJsonArrayForFotoData(response);
}
return photoDataList;
}
and if response is not null i parse it
public static List<PhotoData> parseJsonArrayForFotoData(JsonArray jsonArray) {
List<PhotoData> photoDataList = new ArrayList<PhotoData>();
for (int i = 0; i < jsonArray.size(); i++) {
Log.d("getPhotoDataWithDispatch ", "getPhotoDataWithDispatch ");
JsonElement photoID = ((JsonObject) jsonArray.get(i)).get("pozaID");
JsonElement photoUrl = ((JsonObject) jsonArray.get(i))
.get("pozaURL");
JsonElement thumbURL = ((JsonObject) jsonArray.get(i))
.get("thumbURL");
JsonElement tags = ((JsonObject) jsonArray.get(i)).get("tags");
JsonParser parser = new JsonParser();
JsonArray array = parser.parse(tags.toString()).getAsJsonArray();
List<Tags> tagsList = new ArrayList<Tags>();
for (int j = 0; j < array.size(); j++) {
JsonElement tagId = ((JsonObject) array.get(j)).get("tagID");
JsonElement coordX = ((JsonObject) array.get(j)).get("coordX");
JsonElement coordY = ((JsonObject) array.get(j)).get("coordY");
JsonElement productId = ((JsonObject) array.get(j))
.get("productID");
Tags tagPData = new Tags(tagId.toString(), coordX.toString(),
coordY.toString(), productId.toString());
tagsList.add(tagPData);
}
PhotoData photoData = new PhotoData(photoID.toString(),
photoUrl.toString(), thumbURL.toString(), null, tagsList);
photoDataList.add(photoData);
}
return photoDataList;
}
ok in GetPhotoDataTaskFb do in background i set the instance of the photos object
AppManager.getInstance().setphotoUrls(photoUrls);
and in fragmnet
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.ac_image_pager, container,
false);
// Dummy code
if (counter == 0) {
for (int i = 0; i <= 20; i++) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
counter++;
String[] imageUrls = AppManager.getInstance().getphotoUrls();
//here is where i get the null.. i tried some dummy code to delay and receive data but it is not working
How can I manage to stop create view until all data is parsed?