How to implement a endless Recylerview? - android-recyclerview

Question

How to implement a endless Recylerview?
This is Activity code:
public class ShopList extends AppCompatActivity {
RecyclerView rview;
RatingBar ratingbar;
private String `urlParameters`;
Recyclerviewshopl adapter;
String category;
JSONArray arr = null;
private Boolean Isinternetpresent = false;
ConnectionDetector cd;
String cat;
ProgressDialog dialog;
String lat,lon;
TextView nodata;
ImageView oops;
double latitude, longitude;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shop_list);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ratingbar = (RatingBar) findViewById(R.id.ratingbar);
List<Itemshopl> rowListItem = getAllItemList();
rview=(RecyclerView)findViewById(R.id.recycleshop);
nodata=(TextView)findViewById(R.id.nodata);
oops=(ImageView)findViewById(R.id.oops);
nodata.setVisibility(View.GONE);
oops.setVisibility(View.GONE);
// LayerDrawable stars = (LayerDrawable) ratingbar.getProgressDrawable();
//stars.getDrawable(5).setColorFilter(Color.parseColor("#26ce61"),
// PorterDuff.Mode.SRC_ATOP);
// stars.getDrawable(1).setColorFilter(Color.YELLOW, PorterDuff.Mode.SRC_ATOP);
/* RecyclerView.LayoutParams lp = new RecyclerView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, //width
ViewGroup.LayoutParams.WRAP_CONTENT);//height
rview.setLayoutParams(lp);*/
Bundle extras = getIntent().getExtras();
cat = extras.getString("category");
lat=extras.getString("lat");
lon=extras.getString("lon");
System.out.println("gr++"+cat);
cd = new ConnectionDetector(getApplicationContext());
Isinternetpresent = cd.isConnectingToInternet();
// onBackPressed();
if(Isinternetpresent)
{
shoplist tasku=new shoplist();
tasku.execute(new String[]{"http://abc**.com/****/getshoplist"});
}else{
// Toast.makeText(UserProfileActivity.this,"No Internet connection",Toast.LENGTH_SHORT).show();
showAlertDialog(ShopList.this, "No Internet Connection", "You don't have internet connection.", false);
}
}
public void showAlertDialog(Context context, String title, String message, Boolean status)
{
AlertDialog alertDialog = new AlertDialog.Builder(context).create();
alertDialog.setTitle(title);
alertDialog.setMessage(message);
// alertDialog.setIcon((status) ? R.drawable.success : R.drawable.fail);
alertDialog.setButton("OK", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
}
});
alertDialog.show();
}
private List<Itemshopl> getAllItemList() {
List<Itemshopl> allItems = new ArrayList<Itemshopl>();
allItems.add(new Itemshopl());
allItems.add(new Itemshopl());
allItems.add(new Itemshopl());
allItems.add(new Itemshopl());
return allItems;
}
private class shoplist extends AsyncTask<String, String, List<Itemshopl>> {
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = ProgressDialog.show(ShopList.this, "Loading", "Please Wait...", true);
dialog.show();
}
#Override
protected List<Itemshopl> doInBackground(String... urls) {
URL url;
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
urlParameters = "&cat=" + URLEncoder.encode(cat, "UTF-8")+
"&lat="+ URLEncoder.encode(lat, "UTF-8")+
"&lon="+ URLEncoder.encode(lon, "UTF-8");
url = new URL(urls[0]);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
connection.setUseCaches(false);
connection.setDoInput(true);
connection.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line = null;
while ((line = reader.readLine()) != null) {
buffer.append(line + "\n");
}
String finalJson = buffer.toString();
List<Itemshopl> itemshoplist = new ArrayList<>();
arr = new JSONArray(finalJson);
for (int i = 0; i < arr.length(); i++) {
JSONObject obj = arr.getJSONObject(i);
/// String state = obj.getString("status");
Itemshopl model = new Itemshopl();
model.setName(obj.getString("shopname"));
model.setcat1(obj.getString("subcat1"));
model.setcat2(","+obj.getString("subcat2"));
model.setcat3(","+obj.getString("subcat3"));
model.setcat4(","+obj.getString("subcat4"));
model.setThumbnailUrl(obj.getString("logo"));
model.setid(obj.getString("id"));
model.setrating(obj.getString("rating"));
model.setreview(obj.getString("reviews")+"Reviews");
model.setcat(obj.getString("category"));
itemshoplist.add(model);
}
// cacheThis.writeObject(ShopList.this, "name", "hai");
return itemshoplist;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(List<Itemshopl> detailsModels) {
super.onPostExecute(detailsModels);
dialog.dismiss();
if (detailsModels != null && detailsModels.size() > 0) {
nodata.setVisibility(View.GONE);
oops.setVisibility(View.GONE);
rview=(RecyclerView)findViewById(R.id.recycleshop);
rview.setHasFixedSize(true);
adapter = new Recyclerviewshopl(getApplicationContext(), detailsModels);
rview.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false));
rview.setAdapter(adapter);
}else
{
nodata.setVisibility(View.VISIBLE);
oops.setVisibility(View.VISIBLE);
}
}
}}
Adapter:
public class Recyclerviewshopl extends RecyclerView.Adapter<Recyclerviewshopl.ViewHolder> {
private List<Itemshopl> itemList;
private Context context;
public Recyclerviewshopl(Context context, List<Itemshopl> itemList) {
this.itemList = itemList;
this.context = context;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.name.setText(itemList.get(position).getName());
holder.icons.setImageResource(itemList.get(position).getPhoto());
holder.cat1.setText(itemList.get(position).getcat1());
holder.cat2.setText(itemList.get(position).getcat2());
holder.cat3.setText(itemList.get(position).getcat3());
holder.cat4.setText(itemList.get(position).getcat4());
holder.id.setText(itemList.get(position).getid());
// holder.review.setText(itemList.get(position).getreview());
holder.image.setText(itemList.get(position).getimg());
Glide.with(context).load(itemList.get(position).getThumbnailUrl()).into(holder.icons );
holder.phone.setText(itemList.get(position).getPhone());
holder.cat.setText(itemList.get(position).getcat());
if(itemList.get(position).getrating().equals(""))
{
itemList.get(position).getrating().equals("0");
} else {
//int value= Integer.parseInt(holder.rate.toString());
holder.rate.setRating(Float.parseFloat(itemList.get(position).getrating()));
}
holder.review.setText(itemList.get(position).getreview());
}
public ViewHolder onCreateViewHolder(ViewGroup parent, int i)
{
View layoutview = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardshoplist, null);
ViewHolder sg = new ViewHolder(layoutview);
return sg;
}
#Override
public int getItemCount() {
return this.itemList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView name, cat1,cat2,cat3,cat4,review,image,id,phone,cat;
ImageView photo;
ImageView icons;
RatingBar rate;
public ViewHolder(final View itemView) {
super(itemView);
icons = (ImageView) itemView.findViewById(R.id.img1);
name = (TextView) itemView.findViewById(R.id.shopname);
cat=(TextView)itemView.findViewById(R.id.cat);
cat1=(TextView)itemView.findViewById(R.id.cat1);
cat2=(TextView)itemView.findViewById(R.id.cat2);
cat3=(TextView)itemView.findViewById(R.id.cat3);
cat4=(TextView)itemView.findViewById(R.id.cat4);
review=(TextView)itemView.findViewById(R.id.review);
image=(TextView)itemView.findViewById(R.id.img);
id=(TextView)itemView.findViewById(R.id.idvalue);
phone=(TextView)itemView.findViewById(R.id.phone);
rate=(RatingBar)itemView.findViewById(R.id.ratingbar);
itemView.setOnClickListener(new View.OnClickListener() {
int pos = getAdapterPosition();
#Override
public void onClick(View v) {
int pos = getAdapterPosition();
Intent in = new Intent(v.getContext(),ShopeProfile.class);
in.putExtra("id",id.getText().toString());
in.putExtra("shopname",name.getText().toString());
in.putExtra("phone",phone.getText().toString());
in.putExtra("rate",rate.getRating());
in.putExtra("cat",cat.getText().toString());
v.getContext().startActivity(in);
}
});
}
}
}