Okay, my first post because I've reached the limits of researching.
I try to run 3 requests, each with a different url inside a for loop (I've tried also with while and if) and the code runs perfectly, untiiiiil it gets to the requestqueue. Now the thing is: after the request queue I want to get the response, and only then make the for loop again, but that does not seem to be what the program wants to do, because after I add the requestqueue, the class goes back to the for loop, and continues the whole function until the end, and only in the end I get 3 followed responses, and it is pissing me off, because I want the requests one at each time. I've done many requests before, and thought I knew how to work this out, but I can't =s
Code:
public class MainActivity extends FragmentActivity {
private String totalresults, word, results, server, userAgent, quantity, urly, nome;
private int counter,limit;
EditText nome_empresa;
public TextView output;
ProgressDialog PD;
ViewPager viewPager=null;
public ArrayList half_cards, all_cards;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nome_empresa = (EditText) findViewById(R.id.nome_empresa);
output = (TextView) findViewById(R.id.output);
PD = new ProgressDialog(this);
PD.setMessage("Loading....");
PD.setCancelable(false);
//viewPager = (ViewPager) findViewById(R.id.pager);
//FragmentManager fragmentManager = getSupportFragmentManager();
//viewPager.setAdapter(new MyAdapterAlfa(fragmentManager));
}
public void vamos(View view) {
nome = nome_empresa.getText().toString();
PD.show();
googlesearch(nome, 200, 0);
ListView lv = (ListView) findViewById(R.id.custom_list_view);
lv.setAdapter(new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_list_item_1, all_cards));
all_cards = get_cards(totalresults, nome);
PD.dismiss();
}
public void googlesearch(String worde, int limite, int start) {
word = worde;
results = "";
totalresults = "";
server = "www.google.com";
userAgent = "(Mozilla/5.0 (Windows; U; Windows NT 6.0;en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6";
quantity = "100";
counter = start;
limit = limite;
do_search();
}
public void do_search() {
for(int l=counter; l<=limit; l+=100){
urly = "http://" + server + "/search?num=" + quantity + "&start=" + Integer.toString(counter) + "&hl=en&meta=&q=%40\"" + word + "\"";
RequestQueue requestQueue = Volley.newRequestQueue(this);
StringRequest strReq = new StringRequest(Request.Method.GET, urly, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
half_cards = get_cards(response, word);
all_cards.addAll(half_cards);
} catch (Exception e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: " + error.getMessage());
}
});
requestQueue.add(strReq);
}
}
public ArrayList get_cards(String ola, String ole){
myparser rawres = new myparser(ola, ole);
return rawres.cards();
}
}
Volley request is asynchronous so when response comes back loop is over some time ago. To do request queue it must be recursive - run next request call in response of previous one.
Related
I want to execute taking data from JSON as shown below. But when
Toast.makeText(this, MangIDtrailer.size () + "..... check size of Array IDtrailer .....", Toast.LENGTH_LONG).show();
it returns 0.
I don't know what the cause is.
public class Main2Activity extends AppCompatActivity {
ListView Listmovie;
ArrayList<String> MangIDtrailer;
public static ArrayList<InfoMovie> inforMovieArrayList;
AdapterMovie adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
BottomNavigationView navView = findViewById(R.id.nav_view);
navView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
String url1 ="http://the....ying";
inforMovieArrayList = new ArrayList<>();
MangIDtrailer = new ArrayList<>();
MangIDtrailer = GetIDMovie(url1);
inforMovieArrayList = DataMovie(MangIDtrailer);
Listmovie = (ListView) findViewById(R.id.ListMovie);
adapter = new AdapterMovie(this, R.layout.movielist, inforMovieArrayList);
Listmovie.setAdapter(adapter);
Listmovie.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent intent = new Intent(Main2Activity.this,Review_Movie.class);
intent.putExtra("IDmovie",i);
//Toast.makeText(MainActivity.this, ""+i, Toast.LENGTH_SHORT).show();
startActivity(intent);
}
});
}
public ArrayList<String> GetIDMovie (String Url) {
final ArrayList<String> ArrayID = new ArrayList<>();
final RequestQueue queue = Volley.newRequestQueue(this);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, Url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
String IDTrailer;
JSONArray jsonArrayFreeMovies = response.getJSONArray("FreeMovies");
for (int i=0; i < jsonArrayFreeMovies.length(); i++) {
JSONObject jsonObjectFreeMovies = jsonArrayFreeMovies.getJSONObject(i);
IDTrailer = jsonObjectFreeMovies.getString("trailer_id");
ArrayID.add(IDTrailer);
Toast.makeText(Main2Activity.this, i+"************", Toast.LENGTH_SHORT).show();
}
Toast.makeText(Main2Activity.this, MangIDtrailer.get(2)+"check Data ", Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
queue.add(jsonObjectRequest);
queue.cancelAll(jsonObjectRequest);
return ArrayID;
}
public ArrayList <InfoMovie> DataMovie (ArrayList<String> MangIDtrailer) {
final ArrayList<InfoMovie> inforMovieArray = new ArrayList<>();
final String linkDetail = "http://tk/api/trailers/movDetail?trailer_id=";
final RequestQueue queue2 = Volley.newRequestQueue(this);
//////////////Check that MangIDtrailer.size () has no data////////////////////////////////////
Toast.makeText(this, MangIDtrailer.size()+".....check size of Array IDtrailer .....",Toast.LENGTH_LONG).show();
for (int i=0; i<MangIDtrailer.size(); i++) {
JsonObjectRequest jsonObjectRequest2 = new JsonObjectRequest(Request.Method.GET, linkDetail + MangIDtrailer.get(i) + "&test_fullVer=1", null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
String linkposter, linkbackdrop, namemovie, overviewmovie, Release_date, Urltrailer;
Float Vote_average;
String linkHot = "https://image.tmdb.org/t/p/w500/";
JSONObject jsonObjectInfo = null, jsonObjectMore = null;
JSONObject jsonopFreeMovies1 = response.getJSONObject("FreeMovies");
if (jsonopFreeMovies1.has("FreeMovies")) {
//Toast.makeText(MainActivity.this, "Cos ", Toast.LENGTH_SHORT).show();
JSONObject jsonObjectFreeMovies2 = jsonopFreeMovies1.getJSONObject("FreeMovies");
jsonObjectInfo = jsonObjectFreeMovies2.getJSONObject("Info");
jsonObjectMore = jsonObjectFreeMovies2.getJSONObject("More");
} else {
//Toast.makeText(MainActivity.this, "Khoong cos", Toast.LENGTH_SHORT).show();
jsonObjectInfo = jsonopFreeMovies1.getJSONObject("Info");
jsonObjectMore = jsonopFreeMovies1.getJSONObject("More");
}
namemovie = jsonObjectInfo.getString("title");
Urltrailer = jsonObjectInfo.getString("trailer_urls");
linkposter = linkHot + jsonObjectInfo.getString("thumbnail");
overviewmovie = jsonObjectMore.getString("overview");
linkbackdrop = linkHot + jsonObjectMore.getString("backdrop_path");
Release_date = jsonObjectMore.getString("release_date");
Vote_average = Float.valueOf(jsonObjectMore.getLong("vote_average"));
inforMovieArray.add(new InfoMovie(namemovie, overviewmovie, linkposter, linkbackdrop, Vote_average, Release_date));
Toast.makeText(Main2Activity.this,namemovie + "-" + overviewmovie + "-" + Vote_average, Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
Toast.makeText(Main2Activity.this, "Lỗi", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(Main2Activity.this, "Lỗi Try catch", Toast.LENGTH_SHORT).show();
}
});
queue2.add(jsonObjectRequest2);
}
return inforMovieArray;
}
}
As you suggested
Toast.makeText(this, MangIDtrailer.size()+".....check size of Array IDtrailer .....",Toast.LENGTH_LONG).show();
This is where you are getting size zero, which is absolutely true, because you have only initialized your array MangIDtrailer and it is an empty array. Your function GetIDMovie(url1); has a loop which populates your MangIDtrailer array which is below where you have called the toast. So your array is empty and thus its size returns zero.
One handy tip for you, you should name your functions in camelCase with first letter of your word in lowercase. GetIDMovie(url1) seems more like a class constructor. :)
EDIT:
The above solves your initial problem.
To fully solve your problem, you have to understand that Network Operations are asynchronous, meaning they will execute after sometime or they may return no value at all depending on various conditions, like network bandwidth, your server state, the parameters passed to your HTTP requests, etc.
You have two network calls in your above code; in functions: GetIDMovie() and DataMovie(). The second function requires an array of IDs which is only available if your first request is complete and returns an array of ids. So what you would want to do is, only after you get the array of ids ie. in onResponse of GetIDMovie() after the for loop, you should make a call to DataMovie().
This however is really ugly solution. I hope you will research further for better solution.
I have a website which publishes news on daily basis.
Now, I'm sending a JsonArrayRequest to retrieve and parse the title and summary of each news published on the website. The parsed items are then used to populate RecyclerView.
The problem I'm having is the way volley implements caching .
Let's take this scenario: the app is installed, launched and the RecyclerView is populated. The user reads the news and forgets about the app
Later, the user launches the app and the items are fetched and RecyclerView is populated.
Between the first and the second launch, new news are published on the website. But in the second launch, these new items are not displayed. However, if the user manually go to app settings and clear cache of the app, and relaunch, the new items are displayed.
You get my point?
While I don't want to disable Volley caching, how do I make it to always fetch new items?
EDIT
MainActivity
public class MainActivity extends AppCompatActivity {
private final String TAG = "MainActivity";
//Creating a list of newss
private List<NewsItems> mNewsItemsList;
//Creating Views
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
private ProgressDialog mProgressDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d(TAG, "onCreate called");
//Initializing Views
recyclerView = (RecyclerView) findViewById(R.id.news_recycler);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
//Initializing the newslist
mNewsItemsList = new ArrayList<>();
adapter = new NewsAdapter(mNewsItemsList, this);
recyclerView.setAdapter(adapter);
if (NetworkCheck.isAvailableAndConnected(this)) {
//Calling method to get data
getData();
} else {
//Codes for building Alert Dialog
alertDialogBuilder.setPositiveButton(R.string.alert_retry, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (!NetworkCheck.isAvailableAndConnected(mContext)) {
alertDialogBuilder.show();
} else {
getData();
}
}
});
alertDialogBuilder.setNegativeButton(R.string.alert_cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
alertDialogBuilder.show();
}
}
//This method will get data from the web api
private void getData(){
Log.d(TAG, "getData called");
//Codes for Showing progress dialog
//Creating a json request
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(ConfigNews.GET_URL + getNumber(),
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, "onResponse called");
//Dismissing the progress dialog
if (mProgressDialog != null) {
mProgressDialog.hide();
}
//calling method to parse json array
parseData(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(jsonArrayRequest);
}
//This method will parse json data
private void parseData(JSONArray array){
Log.d(TAG, "Parsing array");
for(int i = 0; i<array.length(); i++) {
NewsItems newsItem = new NewsItems();
JSONObject jsonObject = null;
try {
jsonObject = array.getJSONObject(i);
newsItem.setNews_title(jsonObject.getString(ConfigNews.TAG_VIDEO_TITLE));
newsItem.setNews_body(jsonObject.getString(ConfigNews.TAG_VIDEO_BODY));
} catch (JSONException w) {
w.printStackTrace();
}
mNewsItemsList.add(newsItem);
}
adapter.notifyItemRangeChanged(0, adapter.getItemCount());
}
#Override
public void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy called");
if (mProgressDialog != null){
mProgressDialog.dismiss();
Log.d(TAG, "mProgress dialog dismissed");
}
}
}
Option 1) Delete Cache
before you make a call you can delete the whole cache by myDiskBasedCache.clear() or specific entries by myDiskBasedCache.remove(entryUrl)
Option 2) Custom CacheParser (in the Request)
#Override
protected Response<Bitmap> parseNetworkResponse(NetworkResponse response) {
Response<Bitmap> resp = super.parseNetworkResponse(response);
if(!resp.isSuccess()) {
return resp;
}
long now = System.currentTimeMillis();
Cache.Entry entry = resp.cacheEntry;
if(entry == null) {
entry = new Cache.Entry();
entry.data = response.data;
entry.responseHeaders = response.headers;
entry.ttl = now + 60 * 60 * 1000; //keeps cache for 1 hr
}
entry.softTtl = 0; // will always refresh
return Response.success(resp.result, entry);
}
Option 3) send requests that does not cache
myRequest.setShouldCache(false);
Option 4) use custom Cache implementation
UPDATE:
Example with your code:
//Creating a json request
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(ConfigNews.GET_URL + getNumber(),
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, "onResponse called");
//Dismissing the progress dialog
if (mProgressDialog != null) {
mProgressDialog.hide();
}
//calling method to parse json array
parseData(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}) {
#Override
protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
Response<JSONArray> resp = super.parseNetworkResponse(response);
if(!resp.isSuccess()) {
return resp;
}
long now = System.currentTimeMillis();
Cache.Entry entry = resp.cacheEntry;
if(entry == null) {
entry = new Cache.Entry();
entry.data = response.data;
entry.responseHeaders = response.headers;
entry.ttl = now + 60 * 60 * 1000; //keeps cache for 1 hr
}
entry.softTtl = 0; // will always refresh
return Response.success(resp.result, entry);
}
};
UPDATE 2
Http protocol caching supports many ways to define how the client can cache responses and when to update them. Volley simplifies those rules to:
entry.ttl (time to live in ms) if greater than the current time then cache can be used otherwise fresh request needs to be made
and
entry.softTtl (soft time to live in ms :) if greater than the current time
cache is absolutely valid and no request to the server needs to be made, otherwise new request is still made (even if the ttl is good) and if there is a change new response will be delivered.
note that if ttl is valid and softTtl is not you can receive 2 onResponse calls
Here is my code... which i displayed listview data... Now i want to fetch other details under this id
I want to fetch from database based on the Growers ID. Which is get from the listview
public class FarmerDetails extends Activity implements OnClickListener
{
private TextView tv;
private Button btnView;
private TextView textViewResult;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.farmerdetails);
btnView = (Button) findViewById(R.id.bView);
textViewResult = (TextView) findViewById(R.id.textViewResult);
btnView.setOnClickListener(this);
tv=(TextView) findViewById(R.id.tv1);
}
private void getData(final String value) {
Intent i = getIntent();
String code = i.getStringExtra("itemValue");
tv.setText("Grower's ID: "+code);
String url = Config.DATA_Details+tv.getText().toString().trim();
StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
showJSON(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(FarmerDetails.this,error.getMessage().toString(),Toast.LENGTH_LONG).show();
}
});
}
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void showJSON(String response){
String ccri="";
String name="";
String address="";
String taluk="";
String punch = "";
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray result = jsonObject.getJSONArray(Config.JSON_ARRAY);
JSONObject farmerData = result.getJSONObject(0);
ccri=farmerData.getString(Config.KEY_CCRI);
name = farmerData.getString(Config.KEY_NAME);
address = farmerData.getString(Config.KEY_ADDRESS);
taluk = farmerData.getString(Config.KEY_TALUK);
punch=farmerData.getString(Config.KEY_PUNCH);
}
catch (JSONException e)
{
e.printStackTrace();
}
textViewResult.setText("CCRI Code:\t"+ccri+"Name:\t"+name+"\nAddress:\t" +address+ "\nTaluk:\t"+taluk+"\nPunchayat:\t"+punch);
}
#Override
public void onClick(View v) {
getData();
}
}
In my code only ID is displaying... fetching is not performing.. Plz help!!
this is kinda complicated.
you'll have to check out if ur url is right. Print the url in
console and type it in some browser do the GET request. If there's
no response, well it might be your problem. Maybe you did not
compose the url right.
if there's some response in step 1, ask the server guy what's going
on there. and wait.
if (isConnected()) {
Event eInstance = new Event();
theEvents = eInstance.downloadEvents(eventsNightlife, getActivity());
rAdapter = new RecyclerAdapter(theEvents);
recyclerView.setAdapter(rAdapter);
progrsBar.setVisibility(View.GONE);
....
This is part of the code that runs at "onCreateView". The method downloadEvents uses Volley to download JSON data, extract it and return a list of items (theEvents). Now when my app starts, the recycler view is empty. If I go to my home screen out of the app and then run my app again, this time the data sometimes gets downloaded.
I debugged step by step, and at first launch (i mean when the app is not just resuming), theEvents is empty, so the download didn't return or manage to return anything...
Suggestions on how to execute things before the UI has been shown to the user or what actually needs to be done to approach this task better?
Also, I use a swipeRefreshLayout and at its onRefresh method I do:
public void onRefresh() {
Event eInstance = new Event();
theEvents = eInstance.downloadEvents(eventsNightlife, getActivity());
rAdapter.notifyDataSetChanged();
swipeRefreshLayout.setRefreshing(false);
}
but it doesn't work. I also tried to
rAdapter = new RecyclerAdapter(theEvents);
rAdapter.notifyDataSetChanged();
recyclerView.swapAdapter(rAdapter, false);
still not working.
EDIT: My downloadEvents method implementing Volley:
public List<Event> downloadEvents(String urlService, Context context) {
eventsList = new ArrayList<>();
RequestQueue requestQueue = Volley.newRequestQueue(context);
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest
(Request.Method.GET, urlService, null, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
try {
String durationStr = null;
for (int i = 0; i < response.length(); i++) {
JSONObject eventJson = response.getJSONObject(i);
String title = eventJson.getString("EventTitle");
String body = eventJson.getString("EventBody");
String date = eventJson.getString("EventDate");
String time = eventJson.getString("EventTime");
int duration = Integer.parseInt(eventJson.getString("EventDuration"));
if (duration > 60) {
durationStr = "Duration: " + duration / 60 + " h";
} else if (duration < 60) {
durationStr = "Duration: " + duration + " m";
}
String place = eventJson.getString("EventPlace");
String organ = eventJson.getString("Organization");
Event event = new Event(title, body, date, time, durationStr, place, organ);
eventsList.add(event);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("VOLLEY ERROR", "" + error);
}
}
);
requestQueue.add(jsonArrayRequest);
return eventsList;
}
You can use EventBus for your purpose that is a simple and truth way.
Here, i write an example for how to use EventBus with volley.
Consider that i want to download some data.
This is the class that my download methods is inside it (you can add more methods to it in the future):
Im used volley to download my data:
// Download methods is inside volley
public class MyDownloader{
public static void downloadData(){
DownloadDataEvent dlDataEvent=new DownloadDataEvent();
List<String> myResult=new ArrayList<>();
...
#Override
public void onResponse(JSONArray response) {
super.onResponse(response);
if(respone!=null){
// Do what i want with my received data
dlDataEvent.setData(response);
}
// Post my event by EventBus
EventBus.getDefault().post(dlDataEvent);
...
}
}
}
This is my event:
public class DownloadDataEvent{
private JSONArray mData;
public void setData(JSONArray data){
mData=data;
}
public JSONArray setData(){
return mData;
}
}
Now i want to use my downloadData() method inside my MainActivity:
(I called my downloadData method inside onCreate.)
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
...
// I have to register this class for EventBus subscriber:
if(!EventBus.getDefault().isRegister(this)){
EventBus.getDefault().registerSticky(this);
}
// Call my downloadData method
if(isConnected()){
MyDownloader.downloadData();
}
}
// And for receive the data through EventBus, i have to create a
// method (subscriber) in this template:
public void onEventMainThread(DownloadDataEvent downloadDataEvent){
JSONArray result=downloadDataEvent.getData();
// Do what i want with my received data
}
}
you can create more than one subscriber every where you want to use received data.
I passed JSONArray to my DownloadDataEvent that it is not good. you can deserialize your received data and pass it to your DownloadDataEvent.
I used Volley to download data
Maybe my descriptions were confusing, but EventBus is a well-known library and is very easy to use.
In my application i want to fetch data from multiple URLs and bind json response to respective classes, Like Gallery Url response will be bind with Gallery class.
I am able to make a call for single URL and Class, But i want to make a call for 10 times with different URLs and Class names. How can i do that?
here is my code:
String url="http://icetea09.com/blog-files/demo_json";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvResult = (TextView) findViewById(R.id.tvResult);
VolleyHelper.getInstance(getApplicationContext()).addToRequestQueue(gsonRequest);
}
final GsonRequest gsonRequest = new GsonRequest(url, Gallery.class, null, new Response.Listener<Gallery>() {
#Override
public void onResponse(Gallery gallery) {
String textResult = "";
for (int i = 0; i < gallery.matches.size(); i++) {
Match Item = gallery.matches.get(i);
textResult += "URL: " + Item.url + "\n";
}
tvResult.setText(textResult);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
if (volleyError != null) {
Log.e("MainActivity", "" + volleyError.getMessage());
}
}
});
Please suggest me how can i make this call in for loop?
Thank you.
Here's one way of doing it:
private List<String> urls;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addUrls();
doRequests();
tvResult = (TextView) findViewById(R.id.tvResult);
VolleyHelper.getInstance(getApplicationContext()).addToRequestQueue(gsonRequest);
}
private void addUrls() {
urls = new ArrayList<String> ();
// add your urls here
urls.add("http://icetea09.com/blog-files/demo_json");
}
private void doRequests() {
for (String url : urls) {
GsonRequest gsonRequest = new GsonRequest(url, Gallery.class, null, new Response.Listener<Gallery>() {
#Override
public void onResponse(Gallery gallery) {
String textResult = "";
for (int i = 0; i < gallery.matches.size(); i++) {
Match Item = gallery.matches.get(i);
textResult += "URL: " + Item.url + "\n";
}
tvResult.setText(textResult);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
if (volleyError != null) {
Log.e("MainActivity", "" + volleyError.getMessage());
}
}
});
}
}
Feel free to optimize it as you want, as I'm not very familiar with Gson and initializing a new GsonRequest object per iteration is not recommendable for a big ammount of urls.
The idea behing this code is to encapsulate your GsonRequest inside a for loop. All your urls are given inside an ArrayList (add them in the addUrls() method!), and a new request is performed for every element in the Array.
To perform this loop with multiple classes, you should create a supper-class and make inherit all your classes from it, and in the loop call this supper-class.