i 'm working asynctask.i have two asynctas one activity.In first asynctask i use to parse json and show it in listview and second- to download images by position.
this is a my code
public class MainmoviesList extends Fragment implements
AdapterView.OnItemSelectedListener {
public final static String TAG = MainmoviesList.class.getSimpleName();
String imageurl = "**********";
public static List<ServerItems> arrayOfList;
private ProgressDialog pDialog2;
public static Gallery main_listview;
private AzercellMainPageAdapter objAdapter;
private RelativeLayout mSwitcher;
private CustomerStatistic cs;
private String Eng_Url = "*************"; // eng
public static int mPosition;
public static MainmoviesList newInstance() {
return new MainmoviesList();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.main_movies_list, container,
false);
mSwitcher = (RelativeLayout) rootView.findViewById(R.id.rootNode);
main_listview = (Gallery) rootView
.findViewById(R.id.horizontallistview);
main_listview.setOnItemSelectedListener(this);
main_listview.setSelection(mPosition);
arrayOfList = new ArrayList<ServerItems>();
cs = new CustomerStatistic();
cs.execute(Eng_Url);
return rootView;
}
private class CustomerStatistic extends AsyncTask<String, Void, String> {
ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setCancelable(false);
pDialog.show();
pDialog.setContentView(R.layout.custom_progressdialog);
}
#Override
protected String doInBackground(String... params) {
return Utils.getJSONString(params[0]);
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
Globalclass.MovieServer = result;
JSONArray mainJson = new JSONArray(result);
for (int i = 0; i < mainJson.length(); i++) {
JSONObject objJson = mainJson.getJSONObject(i);
JSONObject cinema = objJson.getJSONObject("Cinemas");
JSONArray mainJson1 = cinema.getJSONArray("Cinemaname");
for (int j = 0; j < mainJson1.length(); j++) {
JSONObject objJson1 = mainJson1.getJSONObject(j);
Log.e("cinema name", objJson1.getString("cinemaName"));
}
ServerItems objItem = new ServerItems();
objItem.setImage(imageurl + objJson.getString("ipone_4"));
objItem.setTitle(objJson.getString("title"));
objItem.setYoutube(objJson.getString("youtube"));
objItem.setWritten(objJson.getString("written"));
objItem.setStars(objJson.getString("stars"));
objItem.setBlurimage(imageurl
+ objJson.getString("ipone_4_blur"));
arrayOfList.add(objItem);
}
} catch (JSONException e) {
e.printStackTrace();
}
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
setAdapterToListview();
}
}
public void setAdapterToListview() {
// objAdapter = new AzercellMainPageAdapter(getApplicationContext(),
// R.layout.azercell_main_page_adapter, arrayOfList);
objAdapter = new AzercellMainPageAdapter(getActivity(),
R.layout.azercell_main_page_adapter, arrayOfList);
main_listview.setAdapter(objAdapter);
}
public void loadimagePosition(int pos) {
}
private void SendFlagIdToServer1(final int position) {
class HttpGetAsyncTask extends AsyncTask<String, Void, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog2 = new ProgressDialog(getActivity());
pDialog2.setCancelable(false);
pDialog2.show();
pDialog2.setContentView(R.layout.custom_progressdialog);
}
#Override
protected String doInBackground(String... params) {
URL url;
try {
url = new URL(arrayOfList.get(position).getBlurimage());
Bitmap bmp = BitmapFactory.decodeStream(url
.openConnection().getInputStream());
Drawable drawable = new BitmapDrawable(bmp);
mSwitcher.setBackgroundDrawable(drawable);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (pDialog2 != null) {
pDialog2.dismiss();
pDialog2 = null;
}
}
}
HttpGetAsyncTask httpGetAsyncTask = new HttpGetAsyncTask();
httpGetAsyncTask.execute();
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
mPosition = position;
SendFlagIdToServer1(position);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
}
i have runtime exception.both asynctas classes runing same time?
it is a possible to run same asynctass in same time one activity?
if anyone knows solution please help me
thanks
Related
I hope someone out there can help me solve my problem. I have android app that have 3 tabs, i use fragment, first tab is recyclerView list, second tabs is map. the problem is in tabs 1, i need to fetch data with volley to recyclerView on tabs 1, if run fine but i cannot see the data on first app start, but when i change tab and back to tab 1 again it will refresh the data and show the data on recyclerView.
Adapter.java
public class CustomListAdapterWarkop extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private List<Warkop> mWarkop;
private LayoutInflater inflater;
public CustomListAdapterWarkop(Context context, List<Warkop> mWarkop) {
this.context=context;
inflater= LayoutInflater.from(context);
this.mWarkop = mWarkop;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.list_warkop_row, parent, false);
ItemViewHolder holder = new ItemViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
ItemViewHolder viewHolder = (ItemViewHolder) holder;
Warkop current = mWarkop.get(position);
viewHolder.tvNamaWarkop.setText(current.getNamaWarkop());
ImageLoader imageLoader = ImageLoader.getInstance();
DisplayImageOptions options = new DisplayImageOptions.Builder().cacheInMemory(true)
.cacheOnDisc(true).resetViewBeforeLoading(true)
.showImageForEmptyUri(R.drawable.noimage)
.showImageOnFail(R.drawable.noimage)
.showImageOnLoading(R.drawable.noimage).build();
imageLoader.displayImage(current.getFotoWarkop(), viewHolder.ivFotoWarkop, options);
}
#Override
public int getItemCount() {
return mWarkop.size();
}
}
ItemHolder.java
package com.andylah.warkopedia;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
/**
* Created by andylah on 11/3/2017.
*/
public class ItemViewHolder extends RecyclerView.ViewHolder {
public ImageView ivFotoWarkop;
public TextView tvNamaWarkop;
public ItemViewHolder(View itemView) {
super(itemView);
tvNamaWarkop = itemView.findViewById(R.id.nama_warkop);
ivFotoWarkop = itemView.findViewById(R.id.image_warkop);
}
}
Tab 1.java
public class tabSatu extends Fragment {
private static final String TAG = tabDua.class.getSimpleName();
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
private boolean isFragmentLoaded = false;
View vTabSatu;
private RecyclerView recyclerView;
public static List<Warkop> warkopList = new ArrayList<Warkop>();
private CustomListAdapterWarkop warkopAdapter;
public tabSatu(){
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
new AsyncFetch().execute();
vTabSatu = inflater.inflate(R.layout.tabsatu_view, container, false);
recyclerView = vTabSatu.findViewById(R.id.warkop_container);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
Log.d("LOG : ", "onCreatedView Run");
// Inflate the layout for this fragment
return vTabSatu;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
warkopAdapter = new CustomListAdapterWarkop(getActivity(), warkopList);
warkopAdapter.notifyDataSetChanged();
recyclerView.setAdapter(warkopAdapter);
Log.d("LOG : ", "onViewCreated Run");
}
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser && !isFragmentLoaded ) {
// Load your data here or do network operations here
isFragmentLoaded = true;
//new AsyncFetch().execute();
}else{
isFragmentLoaded = false;
Log.d("LOG : ", "isFragmentLoaded = false");
}
}
private class AsyncFetch extends AsyncTask<String, String, String> {
ProgressDialog pDialog = new ProgressDialog(getActivity());
HttpURLConnection conn;
URL url = null;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog.setMessage("Loading list warkop ...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected String doInBackground(String... strings) {
try {
// Enter URL address where your json file resides
// Even you can make call to php file which returns json data
url = new URL(AppConfig.LOAD_WARKOP);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return e.toString();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("POST");
// setDoOutput to true as we recieve data from json file
conn.setDoOutput(true);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return e1.toString();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return ("unsuccessful");
}
} catch (IOException e) {
e.printStackTrace();
return e.toString();
} finally {
conn.disconnect();
}
}
#Override
protected void onPostExecute(String result) {
pDialog.dismiss();
try{
JSONObject object = new JSONObject(result);
String getObject = object.getString("warkop");
JSONArray jsonArray = new JSONArray(getObject);
boolean error = object.getBoolean("error");
if(!error){
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
Warkop warkop = new Warkop();
warkop.setNamaWarkop(jsonObject.getString("nama_warkop"));
warkop.setAlamatWrkop(jsonObject.getString("alamat_warkop"));
warkop.setKotaWarkop(jsonObject.getString("kota_warkop"));
warkop.setLatWarkop(Double.parseDouble(jsonObject.getString("lat_warkop")));
warkop.setLangWarkop(Double.parseDouble(jsonObject.getString("long_warkop")));
warkop.setIsWifi(Integer.parseInt(jsonObject.getString("is_wifi")));
warkop.setIsToilet(Integer.parseInt(jsonObject.getString("is_toilet")));
warkop.setIsTv(Integer.parseInt(jsonObject.getString("is_tv")));
warkop.setIsColokan(Integer.parseInt(jsonObject.getString("is_colokan")));
warkop.setIsParkir(Integer.parseInt(jsonObject.getString("is_parkir")));
warkop.setFotoWarkop(jsonObject.getString("foto_warkop"));
warkopList.add(warkop);
}
}else{
String errorMsg = object.getString("error_msg");
Toast.makeText(getContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
}catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getActivity(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
}
Problem: Even you call notifyDataSetChanged() but there are no data in Adapter.
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
warkopAdapter = new CustomListAdapterWarkop(getActivity(), warkopList);
warkopAdapter.notifyDataSetChanged();
recyclerView.setAdapter(warkopAdapter);
}
So you need to set and notify warkopList to Adapter after API call. It will help you.
tabSatu:
#Override
protected void onPostExecute(String result) {
pDialog.dismiss();
try {
JSONObject object = new JSONObject(result);
String getObject = object.getString("warkop");
JSONArray jsonArray = new JSONArray(getObject);
boolean error = object.getBoolean("error");
if (!error) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
Warkop warkop = new Warkop();
...
warkopList.add(warkop);
adapter.setItems(warkopList);
}
}
...
}
CustomListAdapterWarkop: add setItem() method to Adapter
public class CustomListAdapterWarkop extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
...
public void setItems(List<WarkopList> warkopList) {
mWarkop = warkopList;
notifyDataSetChanged();
}
...
}
I'm having a hard time figuring out how to implement the new MyAsyncTask().execute("") that I've searched because I have separate classes that extends Asynctask. I wanted to call the class everytime i click the button. Hope you guys can help me figure this out.
Here is my MainActivity
public class MainActivity extends AppCompatActivity {
String url = "http://192.168.254.103/dbtest/categories.php";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.start);
final ListView lv = (ListView) findViewById(R.id.lv);
final Downloader d = new Downloader(this,url,lv);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.execute();
}
});
}
}
Here is my Downloader.java
public class Downloader extends AsyncTask<Void,Integer, String> {
Context c;
String address;
ListView lv;
ProgressDialog pd;
public Downloader(Context c, String address, ListView lv) {
this.c = c;
this.address = address;
this.lv = lv;
}
//BEFORE JOB STARTS
#Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(c);
pd.setTitle("Fetch Data");
pd.setMessage("Please Wait");
pd.show();
}
#Override
protected String doInBackground(Void... params) {
String data = downloadData();
return data;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
pd.dismiss();
if(s != null){
Parser p =new Parser(c,s,lv);
p.execute();
}else
{
Toast.makeText(c,"Unable to download data",Toast.LENGTH_SHORT).show();
}
}
private String downloadData(){
//connect and get a stream
InputStream is = null;
String line = null;
try{
URL url = new URL(address);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
is = new BufferedInputStream(con.getInputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuffer sb = new StringBuffer();
if(br != null){
while((line = br.readLine()) != null)
{
sb.append(line+"\n");
}
}
else
{
return null;
}
return sb.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if(is != null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
}
and my Parser.java
public class Parser extends AsyncTask<Void,Integer,Integer> {
Context c;
ListView lv;
String data;
ArrayList<String> categories = new ArrayList<>();
ProgressDialog pd;
public Parser(Context c, String data, ListView lv) {
this.c = c;
this.data = data;
this.lv = lv;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(c);
pd.setTitle("Parser");
pd.setMessage("Please Wait");
pd.show();
}
#Override
protected Integer doInBackground(Void... params) {
return this.parse();
}
#Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
if(integer == 1)
{
//ADAPTER
ArrayAdapter<String> adapter = new ArrayAdapter<String>(c, android.R.layout.simple_list_item_1, categories);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
}else
{
Toast.makeText(c,"Unable to Parse",Toast.LENGTH_SHORT).show();
}
pd.dismiss();
}
//PARSE RECEIVED DATA
private int parse(){
try
{
//ADD TGAT DATA TO JSON ARRAY FIRST
JSONArray ja = new JSONArray(data);
//CREATE JO OBJECT TO HOLD A SINGLE ITEM
JSONObject jo = null;
categories.clear();
//LOOP THROUGH ARRAY
for(int i =0 ; i<ja.length();i++)
{
jo = ja.getJSONObject(i);
//RETRIEVE NAME
String name=jo.getString("cat_name");
//ADD TO ARRAY LIST
categories.add(name);
}
return 1;
} catch (JSONException e) {
e.printStackTrace();
}
return 0;
}
}
My Activity Code: Note this is not my main activity, right now i am using a button to fetch images from the database but instead I need to fetch all the images when the app load.
public class QuotesPictures extends Activity implements View.OnClickListener {
private String imagesJSON;
private static final String JSON_ARRAY = "result";
private static final String IMAGE_URL = "url";
private JSONArray arrayImages = null;
private int TRACK = 0;
private Button buttonMoveNext;
private Button buttonMovePrevious;
private ImageView imageView;
private static final String IMAGES_URL = "http://stressreliefapp.esy.es/getAllImages.php";
private Button buttonFetchImages;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quotes_pictures);
//Defining all the buttons
imageView = (ImageView) findViewById(R.id.imageView);
buttonFetchImages = (Button) findViewById(R.id.buttonFetchImages);
buttonMoveNext = (Button) findViewById(R.id.buttonNext);
buttonMovePrevious = (Button) findViewById(R.id.buttonPrev);
buttonFetchImages.setOnClickListener(this);
buttonMoveNext.setOnClickListener(this);
buttonMovePrevious.setOnClickListener(this);
}
//Using AsyncTask to load the data in the background thread and then publishing on the UI thread
private void getImage(String urlToImage) {
class GetImage extends AsyncTask<String, Void, Bitmap> {
ProgressDialog loading;
#Override
protected Bitmap doInBackground(String... params) {
URL url = null;
Bitmap image = null;
String urlToImage = params[0];
try {
url = new URL(urlToImage);
image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return image;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(QuotesPictures.this, "Loading Images...", "Please wait...", true, true);
}
#Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
loading.dismiss();
imageView.setImageBitmap(bitmap);
}
}
GetImage gi = new GetImage();
gi.execute(urlToImage);
}
// Method used to get all the images from the database using AsyncTask
public void getAllImages() {
class GetAllImages extends AsyncTask<String, Void, String> {
ProgressDialog loading;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(QuotesPictures.this, "Loading Images...", "Please wait...", true, true);
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
imagesJSON = s;
extractJSON();
showImage();
}
#Override
protected String doInBackground(String... params) {
String uri = params[0];
BufferedReader bufferedReader = null;
try {
URL url = new URL(uri);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
StringBuilder sb = new StringBuilder();
bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String json;
while ((json = bufferedReader.readLine()) != null) {
sb.append(json + "\n");
}
return sb.toString().trim();
} catch (Exception e) {
return null;
}
}
}
GetAllImages gai = new GetAllImages();
gai.execute(IMAGES_URL);
}
private void extractJSON() {
try {
JSONObject jsonObject = new JSONObject(imagesJSON);
arrayImages = jsonObject.getJSONArray(JSON_ARRAY);
} catch (JSONException e) {
e.printStackTrace();
}
}
private void showImage() {
try {
JSONObject jsonObject = arrayImages.getJSONObject(TRACK);
getImage(jsonObject.getString(IMAGE_URL));
} catch (JSONException e) {
e.printStackTrace();
}
}
private void moveNext() {
if (TRACK < arrayImages.length()) {
TRACK++;
showImage();
}
}
private void movePrevious() {
if (TRACK > 0) {
TRACK--;
showImage();
}
}
#Override
public void onClick(View v) {
if (v == buttonFetchImages) {
getAllImages();
}
if (v == buttonMoveNext) {
moveNext();
}
if (v == buttonMovePrevious) {
movePrevious();
}
}
}
Just execute your download method in onCreate method.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quotes_pictures);
//Defining all the buttons
imageView = (ImageView) findViewById(R.id.imageView);
buttonFetchImages = (Button) findViewById(R.id.buttonFetchImages);
buttonMoveNext = (Button) findViewById(R.id.buttonNext);
buttonMovePrevious = (Button) findViewById(R.id.buttonPrev);
buttonFetchImages.setOnClickListener(this);
buttonMoveNext.setOnClickListener(this);
buttonMovePrevious.setOnClickListener(this);
getImage("your image url");
}
Move your code at onclicklistener to onResume.
public void onResume()
{
super.onResume();
/* your code at OnClickListener */
}
I have a View Pager in my App. The View pager gets the Imagepath from the JSON & shows in a ImageView. The View pager works for the first time. But when the values are changed, it returns a error.
But I have notified the PagerAdapter about the notifyDataSetChanged.
java.lang.IllegalStateException: The application's PagerAdapter changed the adapter's contents without calling PagerAdapter#notifyDataSetChanged! Expected adapter item count: 1, found: 0 Pager id: com.hello.hello:id/pager Pager class: class com.hello.hello.utils.ImageViewTouchViewPager Problematic adapter: class com.hello.hello.utils.ZoomAdapter
ASYNCTASK 1
public class FetchPromo extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
promoList = new ArrayList<String>();
progress = new ProgressDialog(getActivity());
progress.setMessage("Fetching Promotions from your Neighbouring store");
progress.show();
progress.setCanceledOnTouchOutside(false);
}
#Override
protected Void doInBackground(Void... params) {
String url = "http://46.101.126.31/mobileapp/gps/api.php?rquest=get_promotions&latitude=" + userLocation.getLatitude() + "&longitude=" + userLocation.getLongitude();
Log.d("Path", url);
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
String jsonData = response.body().string();
try {
JSONObject jsonObject = new JSONObject(jsonData);
store_name = jsonObject.getString("store_name");
JSONArray promo_path = jsonObject.getJSONArray("image_path");
Log.d("Path", store_name);
for (int i = 0; i < promo_path.length(); i++) {
String path = promo_path.getString(i);
promoList.add(path);
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
store.setText(store_name);
if (promoList.isEmpty()) {
promoList.add(placeholder);
}
mZoomAdapter = new ZoomAdapter(getActivity(), promoList);
mViewPager.setAdapter(mZoomAdapter);
mZoomAdapter.notifyDataSetChanged();
new FetchStore().execute();
progress.dismiss();
}
}
AYNCTASK 2 (where the data has to be loaded again)
public class FetchPromoByID extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
promoList.clear();
progress = new ProgressDialog(getActivity());
progress.setMessage("Fetching Promotions from your Choosen store");
progress.show();
progress.setCanceledOnTouchOutside(false);
}
#Override
protected Void doInBackground(Void... params) {
String url = "http://46.121.116.31/mobileapp/gps/api.php?rquest=get_promotions_by_store_id&store_id=" + Choosen_id;
Log.d("FetchPromoByID", url);
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
String jsonData = response.body().string();
try {
JSONObject jsonObject = new JSONObject(jsonData);
JSONArray promo_path = jsonObject.getJSONArray("image_path");
store_name = jsonObject.getString("store_name");
Log.d("Path", store_name);
for (int i = 0; i < promo_path.length(); i++) {
String path = promo_path.getString(i);
promoList.add(path);
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
mZoomAdapter = new ZoomAdapter(getActivity(), promoList);
mViewPager.setAdapter(mZoomAdapter);
mZoomAdapter.notifyDataSetChanged();
new FetchStore().execute();
progress.dismiss();
}
}
ADAPTER
public class ZoomAdapter extends PagerAdapter {
private Context context;
private ArrayList<String> IMAGES = new ArrayList<>();
public ZoomAdapter(Context context, ArrayList<String> IMAGES) {
this.IMAGES = IMAGES;
this.context = context;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public int getCount() {
return IMAGES.size();
}
#Override
public View instantiateItem(ViewGroup container, int position) {
String url = IMAGES.get(position);
PhotoView photoView = new PhotoView(container.getContext());
// Now just add PhotoView to ViewPager and return it
container.addView(photoView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
Picasso.with(context)
.load(url)
.fit()
.into(photoView);
return photoView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
}
FetchStore
public class FetchStore extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
storeList = new ArrayList<String>();
storeID = new ArrayList<String>();
}
#Override
protected Void doInBackground(Void... params) {
String url = "http://46.101.116.31/mobileapp/gps/api.php?rquest=get_store";
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
String jsonData = response.body().string();
try {
JSONObject jsonObject = new JSONObject(jsonData);
JSONArray storearray = jsonObject.getJSONArray("stores");
for (int i = 0; i < storearray.length(); i++) {
JSONObject storeobj = storearray.getJSONObject(i);
String store = storeobj.getString("name");
String ID = storeobj.getString("id");
storeList.add(store);
storeID.add(ID);
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
choose.setVisibility(View.VISIBLE);
}
}
I have found many similar Questions like this. But none of the solution worked for me. Please guide me.
Thanks in Advance
I think your error is here (Async Task #2)
#Override
protected void onPreExecute() {
super.onPreExecute();
promoList.clear();
progress = new ProgressDialog(getActivity());
progress.setMessage("Fetching Promotions from your Choosen store");
progress.show();
progress.setCanceledOnTouchOutside(false);
}
You make promoList.clear() (set the count to 0),which used in ZoomAdapter instance without notifying.
So notify adapter there or make a temporary ArrayList and clear / addAll in onPostExecute
In this i want to cancel the asynctask i called aysnc task in listview onclickitem...
so if there is no data in particular row's then it will stop execution and remain on same activity.
I called the class in click and if condition if false as file_path is null then it will remain on same activity will not proceed further in another activity.
but in my case it will move to another activity i tried lot many things on this like oncancelled(), cancel(), etc methods but they are not working i put all in loop as well as switch case to break.
public class EAdFragment extends Fragment {
ListView lvAdSurvey;
JSONObject json = null;
public static final String FIRST_COLUMN = "Upl_ID";
public static final String SECOND_COLUMN = "File_Description";
JSONArray jarray = null;
JSONObject jsonObj = null;
String upload_type;
String upl_id;
File f;
String imgurl;
ProgressDialog pDialog;
String upl_ID, type_of_upload, file_description, amount;
String file_path = null;
String file_type, related_to, country, state, city, Number_of_user,
type_illegal;
GetData task;
ViewHolder holder;
public ListAdapter adapter;
String text;
public List<EAdvertActivityData> listData = new ArrayList<EAdvertActivityData>();
public void onViewCreated(View view, Bundle savedInstanceState) {
lvAdSurvey = (ListView) view.findViewById(R.id.lvAdSurvey);
new GetList().execute();
lvAdSurvey.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
// String text =
// lvAdSurvey.getItemAtPosition(position).toString();
holder = (ViewHolder) view.getTag();
text = holder.txtFirstColumn.getText().toString();
Log.d("text:", text);
task = new GetData();
task.execute();
}
});
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_ead, container,
false);
return rootView;
}
private class GetList extends AsyncTask<String, String, JSONObject> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
protected JSONObject doInBackground(String... args) {
String url = "url";
JSONParser jParser = new JSONParser();
jsonObj = jParser.getJSONFromUrl(url);
try {
jarray = jsonObj.getJSONArray("result");
Log.d("lengtharray:", String.valueOf(jarray.length()));
for (int i = 0; i < jarray.length(); i++) {
EAdvertActivityData data = new EAdvertActivityData();
JSONObject jobject = new JSONObject(jarray.get(i)
.toString());
upload_type = jobject.optString("Upl_ID").toString();
String description = jobject.optString("File_description")
.toString();
/*
* Log.d("upload_type",upload_type);
* Log.d("description",description);
*/data.setUpl_ID(upload_type);
data.setFile_description(description);
listData.add(data);
Log.d("data:", listData.toString());
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return jsonObj;
}
protected void onPostExecute(JSONObject jsonObject) {
EAdListViewAdapter adapter = new EAdListViewAdapter(getActivity(),
listData);
lvAdSurvey.setAdapter(adapter);
}
}
private class GetData extends AsyncTask<String, String, String> {
int flag=0;
protected void onPreExecute() {
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Loading Image ....");
pDialog.setCancelable(true);
pDialog.show();
}
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
SharedPreferences pref = getActivity().getSharedPreferences(
"SoundSettings", Context.MODE_PRIVATE);
String user_id = pref.getString("user_id", LoginActivity.userid);
String url = "url"
+ text;
JSONParser jParser = new JSONParser();
try {
json = jParser.getJSONFromUrl(url);
Log.d("jsonadvert:", json.toString());
String status = json.getString("fetchdata");
if (status.equals("Success")) {
type_of_upload = json.getString("Type_of_Upload");
file_description = json.getString("File_description");
amount = json.getString("Amount");
file_path = json.getString("file_path");
file_type = json.getString("File_type");
related_to = json.getString("Related_to");
country = json.getString("Country");
// state = json.getString("state");
Number_of_user = json.getString("Number_of_usr");
type_illegal = json.getString("Type_llegal");
Log.d("type_illegal:", type_illegal);
Log.d("file_path:", file_path);
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String args) {
pDialog.dismiss();
if(file_path==null){
Toast.makeText(getActivity(), "Image does not exists", Toast.LENGTH_LONG).show();
pDialog.cancel();
task.cancel(true);
}else{
imgurl = "http://sharpersofttech.com/sign_up/" + file_path;
Intent in = new Intent(getActivity(), AdvertActivity.class);
in.putExtra("upl_id", text);
in.putExtra("file_description", file_description);
in.putExtra("imgurl", imgurl);
startActivity(in);
((Activity) getActivity()).overridePendingTransition(0, 0);
}
}
}
}