hi i have an app shows the online streamers from Twitch.tv and the data comes from request i send but i cant parse them this is my code
public ArrayList<Twitch> ParseTwitch(JSONArray object, Context context){
ArrayList<Twitch> chanels = new ArrayList<>();
try {
for (int i = 0;i<object.length();i++){
JSONObject streamObjct = object.getJSONObject(i);
JSONObject chanel = streamObjct.getJSONObject("channel");
JSONObject url= streamObjct.getJSONObject("preview");
final Twitch twitch = new Twitch();
twitch.setName(chanel.getString(CHANEL_NAME));
twitch.setStatus(chanel.getString(CHANEL_STATUS));
twitch.setGame(streamObjct.getString(GAME));
twitch.setLanguage(chanel.getString(BROADCASTER_LANGUAGE));
twitch.setViewrs(streamObjct.getInt(VIEWRS));
String imageUrl = url.getString("medium");
ImageRequest request =new ImageRequest(imageUrl, new Response.Listener<Bitmap>() {
#Override
public void onResponse(Bitmap response) {
twitch.setLogo(response);
}
}, 0, 0, null, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue quew = Volley.newRequestQueue(context);
quew.add(request);
chanels.add(twitch);
}
return chanels;
}catch (JSONException e){
e.printStackTrace();
}
return chanels;
}
and this my request
https://api.twitch.tv/kraken/search/streams?query=poker&client_id=gxdzx71jhztgyypn4kjemm1htovv1o
at least can anyone tell me should i work with sqlite Database or not?
where i called TwitchParcer
private void prepareData(String url, final ListView mListView) {
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray stream = response.getJSONArray("streams");
TwitchApiParser parser = new TwitchApiParser();
ArrayList items= parser.ParseTwitch(stream);
TwitchAdapter adapter = new TwitchAdapter(getContext(),
R.layout.activity_last_news_fragment,items);
mListView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), "Ridi Bro", Toast.LENGTH_SHORT).show();
}
});
RequestQueue quew = Volley.newRequestQueue(getActivity().getApplicationContext());
quew.add(request);
}
and this is new Error
Process: app.mma.introsliderproject, PID: 11542
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at app.mma.PokerInfo.twitch.TwitchAdapter.getView(TwitchAdapter.java:39)
i solve the problem this is the complete code
public class TwitchFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.twitch_main, container, false);
String url="http://192.168.1.101/mySite/Flowers/flowers2.json";
ListView mListView = (ListView) view.findViewById(R.id.twitch_last);
prepareData(url,mListView);
return view;
}
private void prepareData(String url, final ListView mListView) {
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray stream = response.getJSONArray("streams");
TwitchApiParser parser = new TwitchApiParser();
ArrayList items= parser.ParseTwitch(stream,getActivity().getApplicationContext());
TwitchAdapter adapter = new TwitchAdapter(getContext(),
R.layout.twitch,items);
mListView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), "Ridi Bro", Toast.LENGTH_SHORT).show();
}
});
RequestQueue quew = Volley.newRequestQueue(getActivity().getApplicationContext());
quew.add(request);
}
and the parser
public class TwitchApiParser {
private final String CHANEL_NAME="display_name";
private final String GAME="game";
private final String CHANEL_STATUS = "status";
private final String BROADCASTER_LANGUAGE = "broadcaster_language";
private final String VIEWRS = "viewers";
public ArrayList<Twitch> ParseTwitch(JSONArray object, Context context){
ArrayList<Twitch> chanels = new ArrayList<>();
try {
for (int i = 0;i<object.length();i++){
JSONObject streamObjct = object.getJSONObject(i);
JSONObject chanel = streamObjct.getJSONObject("channel");
JSONObject url= streamObjct.getJSONObject("preview");
final Twitch twitch = new Twitch();
twitch.setName(chanel.getString(CHANEL_NAME));
twitch.setStatus(chanel.getString(CHANEL_STATUS));
twitch.setGame(streamObjct.getString(GAME));
twitch.setLanguage(chanel.getString(BROADCASTER_LANGUAGE));
twitch.setViewrs(streamObjct.getInt(VIEWRS));
String imageUrl = url.getString("medium");
ImageRequest request =new ImageRequest(imageUrl, new Response.Listener<Bitmap>() {
#Override
public void onResponse(Bitmap response) {
twitch.setLogo(response);
}
}, 0, 0, null, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue quew = Volley.newRequestQueue(context);
quew.add(request);
chanels.add(twitch);
}
return chanels;
}catch (JSONException e){
e.printStackTrace();
}
return chanels;
}
Related
I am sending server request to handle response and error i have implemented interface. I just want to know how to handle if "mResultCallBack ==null" without editing condition if(mResultCallBack!=null). code are as follow:-
public Context mContext;
private IResult mResultCallBack;
public CServerRequest(IResult mResultCallBack, Context context) {
this.mContext = context;
this.mResultCallBack = mResultCallBack;
}
public void postWalletRequest(final String requestType, String url, JSONObject jsonObject) {
try {
RequestQueue queue = Volley.newRequestQueue(mContext);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url, jsonObject, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
mResultCallBack.notifySuccess(requestType, response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
mResultCallBack.notifyError(requestType, error);
}
});
jsonObjectRequest.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
queue.add(jsonObjectRequest);
} catch (Exception e) {
e.printStackTrace();
}
}
}
and code for interface
public void notifySuccess(String requestType,JSONObject response);
public void notifyError(String requestType,VolleyError error);
AsyncTask.execute(new Runnable() {
#Override
public void run() {
if (loginSessionManager.isLogin()){
cServerRequest = new CServerRequest(mResultcallBack,mContext);
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject();
jsonObject.put(CRequestKey.AGENT_CODE, m_szMobileNumber.trim());// sending mobile no.(static right know becuse of ser side data on other is null
jsonObject.put(CRequestKey.PIN, m_szEncryptedPassword.trim());// same here as said above
Log.e(TAG,"Request::"+jsonObject.toString());
} catch (JSONException e) {
e.printStackTrace();
}
final String s_szWalletURL = CAPIStorage.IREWARDS_URL + CAPIStorage.WALLET_BALANCE_URL;
cServerRequest.postWalletRequest("POST",s_szWalletURL,jsonObject);
}else {
Log.e(TAG,"Not loggedin");
}
}
});
public Context mContext;
private IResult mResultCallBack;
public CServerRequest(IResult mResultCallBack, Context context) {
this.mContext = context;
this.mResultCallBack = mResultCallBack;
}
public void postWalletRequest(final String requestType, String url, JSONObject jsonObject) {
try {
if(jsonObject.getJSONArray.length() == 0) {
System.out.println("JSONArray is null");
}
else{
System.out.println("JSONArray is not null");
//parse your string here
RequestQueue queue = Volley.newRequestQueue(mContext);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url, jsonObject, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
mResultCallBack.notifySuccess(requestType, response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
mResultCallBack.notifyError(requestType, error);
}
});
jsonObjectRequest.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
queue.add(jsonObjectRequest);
}
} catch (Exception e) {
e.printStackTrace();
}
}
In my app I have an Activity LoginUserActivity that contains a button perform a connection to a web-server using JSONObject request and Volley. If the login is successfull will be launched another activity, but if it isn't I need to re-enable the button.
LoginUserActivity
public void OnLoginUtente(View view) {
final String mail = etMail.getText().toString();
final String pw = etPassword.getText().toString();
bLogin.setEnabled(false);
DBConnection connection = new DBConnection(mail, pw, getApplicationContext());
connection.doLogin();
}
doLogin()
public void doLogin() {
JSONObject obj = new JSONObject();
try {
obj.put("type", type);
obj.put("email", email);
} catch (JSONException e) {
e.printStackTrace();
}
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, URL, obj,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
Toast.makeText(context, response.getString("Status"), Toast.LENGTH_SHORT).show();
if (response.getString("Esito").equals("true")) {
intent = new Intent(context, MainUtente.class);
context.startActivity(intent);
}else{
//I think I've to put something here
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}
);
jsonObjectRequest.setShouldCache(false);
RequestQueue requestQueue = Volley.newRequestQueue(context);
requestQueue.getCache().clear();
requestQueue.add(jsonObjectRequest);
}
I've tried different things, such as make doLogin() return a boolean and then re-enable the button from the activity or try to inflate the layout of the calling activity in the else, but neither of these worked. If possible I'd like to keep the doLogin() method void and without parameters.
LoginUserActivity
public void OnLoginUtente(View view) {
final String mail = etMail.getText().toString();
final String pw = etPassword.getText().toString();
DBConnection connection = new DBConnection(mail, pw, getApplicationContext());
connection.doLogin(this);
}
public void disableLoginButton()
{
bLogin.setEnabled(false);
}
doLogin
public void doLogin(final LoginActivity activity) {
JSONObject obj = new JSONObject();
try {
obj.put("type", type);
obj.put("email", email);
} catch (JSONException e) {
e.printStackTrace();
}
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, URL, obj,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
Toast.makeText(context, response.getString("Status"), Toast.LENGTH_SHORT).show();
if (response.getString("Esito").equals("true")) {
new Handler(Looper.getMainLooper()).post(new Runnable(){
public void run() {
activity.disableLoginButton();
}
);
activity.disableLoginButton();
intent = new Intent(context, MainUtente.class);
context.startActivity(intent);
}else{
//I think I've to put something here
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}
);
jsonObjectRequest.setShouldCache(false);
RequestQueue requestQueue = Volley.newRequestQueue(context);
requestQueue.getCache().clear();
requestQueue.add(jsonObjectRequest);
}
You may replace new Handler(Looper.getMainLooper()).post(runnable) with activity.runOnUiThread(runnable)
When I call getData.It seems that it is hard to get the result out from the onResponse. I know it cannot work in this current way. Could anyone help me to settle this problem?
getData()
private void getData(){
//Creating a string request
StringRequest stringRequest = new StringRequest(SPINNER_URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
// Log.d("Country_name","hi");
JSONObject j = null;
try {
//Parsing the fetched Json String to JSON Object
j = new JSONObject(response);
//Storing the Array of JSON String to our JSON Array
result = j.getJSONArray(JSON_ARRAY);
Log.v("xxxxx",result.toString());
String mysh=result.toString().substring(1, result.toString().length()-1);
JSONArray jsonArray = new JSONArray(mysh);
//Calling method getCountry to get the country from the JSON Array
getCountry(jsonArray);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
//Creating a request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(stringRequest);
}
Try this i think it should work
private void getData(){
//Creating a string request
StringRequest stringRequest = new StringRequest(SPINNER_URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONArray jsonArray = new JSONArray(response);
getCountry(jsonArray);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
Try that, this will help.
private void getData() {
String tag_string_req = "req_name";
spotsDialog.show();
StringRequest strReq = new StringRequest(Method.POST,
YOUR URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d(TAG, "Response: " + response.toString());
try {
JSONObject object = new JSONObject(response);
JSONArray array = object.getJSONArray("YOUR ARRAY NAME");
for (int i=0;i<array.length();i++){
String result = array.getString(i).toString();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Error: " + error.getMessage());
}
});
strReq.setRetryPolicy(new RetryPolicy() {
#Override
public void retry(VolleyError arg0) throws VolleyError {
}
#Override
public int getCurrentTimeout() {
return 0;
}
#Override
public int getCurrentRetryCount() {
return 0;
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(stringRequest);
}
Happy To Help.
Hello i am posting data to server in json format,
but it returns volley server error in error response`
RequestQueue queue = Volley.newRequestQueue(this);
JSONObject jobj=new JSONObject();
try {
jobj.put("id",”123”);
jobj.put("session","new");
JSONArray array = null;
array = new JSONArray();
for (int i = 0;i<3;i++){
JSONObject jsonObject = new JSONObject();
jsonObject.put("name","test");
jsonObject.put("content","test");
jsonObject.put("time"," 2016-04-07T11:44:22.407Z ");
array.put(jsonObject);
}
Log.e(" array "," arrr"+array.toString());
jobj.put("data",array);
} catch (JSONException e) {
e.printStackTrace();
}
Log.e("jsondata",jobj.toString());
JsonObjectRequest sr= new JsonObjectRequest(post_url, jobj, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}){
#OveRequestQueue queue = Volley.newRequestQueue(this);
JSONObject jobj=new JSONObject();
try {
jobj.put("id",”123”);
jobj.put("session","new");
JSONArray array = null;
array = new JSONArray();
for (int i = 0;i<3;i++){
JSONObject jsonObject = new JSONObject();
jsonObject.put("name","test");
jsonObject.put("content","test");
jsonObject.put("time"," 2016-04-07T11:44:22.407Z ");
array.put(jsonObject);
}
Log.e(" array "," arrr"+array.toString());
jobj.put("data",array);
} catch (JSONException e) {
e.printStackTrace();
}
Log.e("jsondata",jobj.toString());
JsonObjectRequest sr= new JsonObjectRequest(post_url, jobj, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}rride
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String,String> params = new HashMap<String, String>();
params.put("Content-Type","application/json");
return params;
}
};
queue.add(sr);`
Have a singleton which handles the request queue.
public class VolleySingleton {
// Singleton object...
private static VolleySingleton instance;
final private RequestQueue requestQueue;
private static ImageLoader imageLoader;
//Constructor...
private VolleySingleton(Context context) {
requestQueue = Volley.newRequestQueue(context);
imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {
private final LruCache<String, Bitmap> cache = new LruCache<>(100000000);
#Override
public Bitmap getBitmap(String url) {
return cache.get(url);
}
#Override
public void putBitmap(String url, Bitmap bitmap) {
cache.put(url, bitmap);
}
});
}
// Singleton method...
public static VolleySingleton getInstance(Context context) {
if (instance == null) {
instance = new VolleySingleton(context);
}
return instance;
}
public RequestQueue getRequestQueue(Context context) {
if (requestQueue != null) {
return requestQueue;
} else {
getInstance(context);
return requestQueue;
}
}
private RequestQueue getRequestQueue() {
return requestQueue;
}
public static ImageLoader getImageLoader(Context context) {
if (imageLoader != null) {
return imageLoader;
} else {
getInstance(context);
return imageLoader;
}
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag("App");
getRequestQueue().add(req);
}
}
Then using the below method you can send the request.
public void postVolley(final Context context, String url, JSONObject jsonObject) {
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST, url, jsonObject, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject responseJson) {
Log.e("success", "" + responseJson.toString());
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("error", "" + error);
}
}) {
/**
* Setting the content type
*/
#Override
public String getBodyContentType() {
return "application/json;charset=UTF-8";
}
};
VolleySingleton.getInstance(context).addToRequestQueue(jsonObjReq);
}
This works fine for me.
I am new to android development and I need help. I want to set response result to resultDomain object and return . but it returns as initiated.
how to solve this ? thanks in advance.
public class NetworkController {
public static Context context = null;
static UserDomain resultDomain = null;
public UserDomain login( UserDomain userDomain, Context context) {
resultDomain = new UserDomain();
this.context = context;
JSONObject jsonObject = null;
try {
Gson gson = new Gson();
jsonObject = new JSONObject(gson.toJson(userDomain));
} catch (JSONException e) {
e.printStackTrace();
}
RequestQueue requestQueue = Volley.newRequestQueue(context);
JsonObjectRequest jsonObjectRequest =
new JsonObjectRequest(Request.Method.POST, Constant.SERVER_URL + Constant.LOGIN, jsonObject,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject jsonObject) {
Gson gson = new Gson();
resultDomain = gson.fromJson(jsonObject.toString(), UserDomain.class);
Log.v("Here is Value ", resultDomain.getMessage());
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
resultDomain = null;
}
});
requestQueue.add(jsonObjectRequest);
return resultDomain;
}
}
public class NetworkController {
public static Context context = null;
static UserDomain resultDomain = null;
public void login( UserDomain userDomain, Context context,Response.Listener<JSONObject> l1, Response.ErrorListener l2) {
resultDomain = new UserDomain();
this.context = context;
JSONObject jsonObject = null;
try {
Gson gson = new Gson();
jsonObject = new JSONObject(gson.toJson(userDomain));
} catch (JSONException e) {
e.printStackTrace();
}
RequestQueue requestQueue = Volley.newRequestQueue(context);
JsonObjectRequest jsonObjectRequest =
new JsonObjectRequest(Request.Method.POST, Constant.SERVER_URL + Constant.LOGIN, jsonObject,
l1,l2);
requestQueue.add(jsonObjectRequest);
}
NetworkController .login(user,context,new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject jsonObject) {
Gson gson = new Gson();
resultDomain = gson.fromJson(jsonObject.toString(), UserDomain.class);
Log.v("Here is Value ", resultDomain.getMessage());
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
resultDomain = null;
}
});
or use Handler