Android MySql Volley RecyclerView NetworkImage

Android MySql Volley RecyclerView NetworkImage - android

I saw this tutorial : https://www.simplifiedcoding.net/android-custom-listview-with-images-using-recyclerview-and-volley/
But, I am getting some problem. Here's my code :
Config.java
public class Config {
//URL of my API
public static final String DATA_URL = "http://192.168.10.7/connection.php";
//Tags for my JSON
public static final String TAG_IMAGE_URL = "image";
public static final String TAG_NAME = "name";
public static final String TAG_PRICE = "price";
}
connection.php
<?php
$host="localhost";
$username="root";
$password="";
$db_name="datatest";
$con=mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql = "select * from news";
$result = mysql_query($sql);
$json = array();
if(mysql_num_rows($result)){
while($row=mysql_fetch_assoc($result)){
$json['news'][]=$row;
}
}
mysql_close($con);
echo json_encode($json);
?>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private List<TheMain> listTheMain;
//Creating Views
private RecyclerView recyclerView;
private RecyclerView.LayoutManager layoutManager;
private RecyclerView.Adapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Initializing Views
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
listTheMain = new ArrayList<>();
//Calling method to get data
getData();
}
//This method will get data from the web api
private void getData(){
//Showing a progress dialog
final ProgressDialog loading = ProgressDialog.show(this,"Loading Data", "Please wait...",false,false);
//Creating a json array request
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Config.DATA_URL,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
//Dismissing progress dialog
loading.dismiss();
//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){
for(int i = 0; i<array.length(); i++) {
TheMain themaina = new TheMain();
JSONObject json = null;
try {
json = array.getJSONObject(i);
themaina.setImageUrl(json.getString(Config.TAG_IMAGE_URL));
themaina.setName(json.getString(Config.TAG_NAME));
themaina.setPrice(json.getString(Config.TAG_PRICE));
} catch (JSONException e) {
e.printStackTrace();
}
listTheMain.add(themaina);
}
//Finally initializing our adapter
adapter = new CardAdapter(listTheMain, this);
//Adding adapter to recyclerview
recyclerView.setAdapter(adapter);
}
}
CardAdapter.java
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {
private ImageLoader imageLoader;
private Context context;
List<TheMain> themain;
public CardAdapter(List<TheMain>themain, Context context){
super();
this.themain = themain;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.news_list, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
TheMain themaina = themain.get(position);
imageLoader = CustomVolleyRequest.getInstance(context).getImageLoader();
imageLoader.get(themaina.getImageUrl(), ImageLoader.getImageListener(holder.imageView, R.mipmap.ic_launcher, android.R.drawable.ic_dialog_alert));
holder.imageView.setImageUrl(themaina.getImageUrl(), imageLoader);
holder.textViewName.setText(themaina.getName());
holder.textViewPrice.setText(themaina.getPrice());
}
#Override
public int getItemCount() {
return themain.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
public NetworkImageView imageView;
public TextView textViewName;
public TextView textViewPrice;
public ViewHolder(View itemView) {
super(itemView);
imageView = (NetworkImageView) itemView.findViewById(R.id.newsOne);
textViewName = (TextView) itemView.findViewById(R.id.title);
textViewPrice= (TextView) itemView.findViewById(R.id.price);
}
}
}
CustomVolleyRequest.java
public class CustomVolleyRequest {
private static CustomVolleyRequest customVolleyRequest;
private static Context context;
private RequestQueue requestQueue;
private ImageLoader imageLoader;
private CustomVolleyRequest(Context context) {
this.context = context;
this.requestQueue = getRequestQueue();
imageLoader = new ImageLoader(requestQueue,
new ImageLoader.ImageCache() {
private final LruCache<String, Bitmap>
cache = new LruCache<String, Bitmap>(20);
#Override
public Bitmap getBitmap(String url) {
return cache.get(url);
}
#Override
public void putBitmap(String url, Bitmap bitmap) {
cache.put(url, bitmap);
}
});
}
public static synchronized CustomVolleyRequest getInstance(Context context) {
if (customVolleyRequest == null) {
customVolleyRequest = new CustomVolleyRequest(context);
}
return customVolleyRequest;
}
public RequestQueue getRequestQueue() {
if (requestQueue == null) {
Cache cache = new DiskBasedCache(context.getCacheDir(), 10 * 1024 * 1024);
Network network = new BasicNetwork(new HurlStack());
requestQueue = new RequestQueue(cache, network);
requestQueue.start();
}
return requestQueue;
}
public ImageLoader getImageLoader() {
return imageLoader;
}
}
TheMain.java
public class TheMain {
//Data Variables
private String imageUrl;
private String name;
private String price;
//Getters and Setters
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
}
I'm not getting any result. The ProgressDialog just starts. Nothing then.
Thanks in advance.

Related

How to apply RecycleView in Fragment

I have a fragment, the name is galery. in the fragment galery i'll showing a recycleView that contains name list. but i find an error in this script :
LinearLayoutManager llm = new LinearLayoutManager(this);
and this my full code :
public class galery extends Fragment {
private RecyclerView lvhape;
private RequestQueue requestQueue;
private StringRequest stringRequest;
ArrayList<HashMap<String, String>> list_data;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_galery, container, false);
String url = "http://bls.hol.es/read.php";
lvhape = (RecyclerView) rootView.findViewById(R.id.lvhape);
LinearLayoutManager llm = new LinearLayoutManager(this);
llm.setOrientation(LinearLayoutManager.VERTICAL);
lvhape.setLayoutManager(llm);
requestQueue = Volley.newRequestQueue(galery.this);
list_data = new ArrayList<HashMap<String, String>>();
stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("response", response);
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("result");
for (int a = 0; a < jsonArray.length(); a++) {
JSONObject json = jsonArray.getJSONObject(a);
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", json.getString("id"));
map.put("nama", json.getString("nama"));
map.put("alamat", json.getString("alamat"));
map.put("poto", json.getString("poto"));
list_data.add(map);
AdapterList adapter = new AdapterList(galery.this, list_data);
lvhape.setAdapter(adapter);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity().getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
requestQueue.add(stringRequest);
return rootView;
}
}

Try This On Fragment Create Adapter And Model Class And RecyclerView in .xml Class.
public class Event extends Fragment {
RecyclerView recyclerView;
private Event_Adapter event_adapter;
public Event_Model event_model;
public static List<Event_Model> list;
RecyclerView.LayoutManager mLayoutManager;
private static final String FETCH_ID = "id";
private static final String FETCH_NAME = "event_type";
private static final String FETCH_MOBILE = "contact";
private static final String FETCH_DATE = "date";
private static final String FETCH_IMAGE = "uri";
public static final String FETCH_DETAIL = "Your Url";
String type,number,date,uri,id;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v= inflater.inflate(R.layout.fragment_event, container, false);
list = new ArrayList<Event_Model>();
recyclerView = (RecyclerView) v.findViewById(R.id.event_recycler);
mLayoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(mLayoutManager);
fetchdetails();
return v;
}
private void fetchdetails(){
StringRequest jor = new StringRequest(Request.Method.POST, FETCH_DETAIL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
/* Toast.makeText(getActivity(),response,Toast.LENGTH_LONG).show();*/
try {
JSONArray ja = new JSONArray(response);
for (int i = 0; i < ja.length(); i++) {
JSONObject jsonObject = ja.getJSONObject(i);
Integer.parseInt(jsonObject.optString("id").toString());
type = jsonObject.getString(FETCH_NAME);
number = jsonObject.getString(FETCH_MOBILE);
date = jsonObject.getString(FETCH_DATE);
uri = jsonObject.getString(FETCH_IMAGE);
id = jsonObject.getString(FETCH_ID);
event_model = new Event_Model(type,number,date,uri,id);
list.add(event_model);
}
} catch (JSONException e) {
e.printStackTrace();
}
event_adapter= new Event_Adapter(getActivity(), list);
recyclerView.setAdapter(event_adapter);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", "Error");
}
}
);
RetryPolicy retryPolicy=new DefaultRetryPolicy(60000,0,DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
jor.setRetryPolicy(retryPolicy);
VolleySingleton.getInstance(getActivity()).addToRequestQueue(jor);
}
}

I did some changes it works fine in my app try it and if any error occurred mention in comment.
public class GalaryFragment extends Fragment {
private RecyclerView recyclerView;
private List<ProductModel> list1;
private ProductModel productMode;
private ProductAdapter productAdapter;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.frament_galary, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
String url = "http://bls.hol.es/read.php";
mRecyclerView = (RecyclerView) view.findViewById(R.id.lvhape);
list1 = new ArrayList<>();
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false));
cashbackAdapter = new ProductAdapter(getActivity(), list1);
mRecyclerView2.setAdapter(productAdapter);
final ProgressDialog dialog = new ProgressDialog(getActivity());
dialog.setMessage("Loading......");
dialog.show();
StringRequest stringRequest = new StringRequest(Method.POST, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//Toast.makeText(getActivity(),response+"",Toast.LENGTH_LONG).show();
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String id = jsonObject.getString("id");
String name = jsonObject.getString("name");
String image = jsonObject.getString("image");
productModel = new ProductModel(id, name, image);
list1.add(productModel);
}
productAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", "Error");
}
});
VolleySingleton.getInstance(getActivity()).addToRequestQueue(stringRequest);
}
}
ProductAdapter code:
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.MyViewHolder> {
private List<ProductModel> list;
private Context mContext;
public ProductAdapter(Context mContext, List<ProductModel> list) {
this.mContext = mContext;
this.list=list;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview_galary, parent, false);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
final ProductModel productModel=list.get(position);
holder.name.setText(productModel.getName());
Picasso.with(mContext)
.load(productModel.getImage())
.placeholder(R.mipmap.ic_launcher)
.error(R.mipmap.ic_launcher)
.into(holder.iv);
}
#Override
public int getItemCount() {
return list.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView name;
public ImageView iv;
public MyViewHolder(View view) {
super(view);
name = (TextView) view.findViewById(R.id.name);
iv = (ImageView) view.findViewById(R.id.image);
}
}
}
PoductModel code:
public class ProductModel {
String id;
String name;
String image;
public nameModel(String id, String name, String image) {
this.id = id;
this.name = name;
this.image = image;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getname() {
return name;
}
public void setname(String name) {
this.name = name;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
VolleySingleton class:
public class VolleySingleton {
private static VolleySingleton mInstance;
private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;
private static Context mCtx;
private VolleySingleton(Context context) {
mCtx = context;
mRequestQueue = getRequestQueue();
mImageLoader = new ImageLoader(mRequestQueue,
new ImageLoader.ImageCache() {
private final LruCache<String, Bitmap>
cache = new LruCache<String, Bitmap>(20);
#Override
public Bitmap getBitmap(String url) {
return cache.get(url);
}
#Override
public void putBitmap(String url, Bitmap bitmap) {
cache.put(url, bitmap);
}
});
}
public static synchronized VolleySingleton getInstance(Context context) {
if (mInstance == null) {
mInstance = new VolleySingleton(context);
}
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
// getApplicationContext() is key, it keeps you from leaking the
// Activity or BroadcastReceiver if someone passes one in.
mRequestQueue = Volley.newRequestQueue(mCtx.getApplicationContext());
}
return mRequestQueue;
}
public <T> void addToRequestQueue(Request<T> req) {
getRequestQueue().add(req);
}
public ImageLoader getImageLoader() {
return mImageLoader;
}
}

try this
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_galery, container, false);
String url = "http://bls.hol.es/read.php";
lvhape = (RecyclerView) getView().findViewById(R.id.lvhape);
LinearLayoutManager llm = new LinearLayoutManager(gallary.getContext());
llm.setOrientation(LinearLayoutManager.VERTICAL);
lvhape.setLayoutManager(llm);
requestQueue = Volley.newRequestQueue(galery.this);
list_data = new ArrayList<HashMap<String, String>>();
stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("response", response);
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("result");
for (int a = 0; a < jsonArray.length(); a++) {
JSONObject json = jsonArray.getJSONObject(a);
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", json.getString("id"));
map.put("nama", json.getString("nama"));
map.put("alamat", json.getString("alamat"));
map.put("poto", json.getString("poto"));
list_data.add(map);
AdapterList adapter = new AdapterList(galery.this, list_data);
lvhape.setAdapter(adapter);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity().getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
requestQueue.add(stringRequest);
return rootView;
}

onCreate() will be called before onCreateView() methods so getView() will return null
Try like this
public class galery extends Fragment {
private RecyclerView lvhape;
private RequestQueue requestQueue;
private StringRequest stringRequest;
ArrayList<HashMap<String, String>> list_data;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_galery, container, false);
return rootView;
}
public void onViewCreated(View view, Bundle savedInstanceState) {
String url = "http://bls.hol.es/read.php";
lvhape = (RecyclerView) view.findViewById(R.id.lvhape);
LinearLayoutManager llm = new LinearLayoutManager(this);
llm.setOrientation(LinearLayoutManager.VERTICAL);
lvhape.setLayoutManager(llm);
requestQueue = Volley.newRequestQueue(getActivity());
list_data = new ArrayList<HashMap<String, String>>();
stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("response", response);
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("result");
for (int a = 0; a < jsonArray.length(); a++) {
JSONObject json = jsonArray.getJSONObject(a);
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", json.getString("id"));
map.put("nama", json.getString("nama"));
map.put("alamat", json.getString("alamat"));
map.put("poto", json.getString("poto"));
list_data.add(map);
AdapterList adapter = new AdapterList(galery.this, list_data);
lvhape.setAdapter(adapter);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity().getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
requestQueue.add(stringRequest);
}

error when i display my data in recycler view :RecyclerView: No adapter attached; skipping layout

I'm traying to get data from my mysql database and display them in a list view but the probleme is that the list view show only one attribut and for the others i have an error:RecyclerView: No adapter attached; skipping layout
this is my adapter :
public class DerpAdapter extends RecyclerView.Adapter<DerpAdapter.DerpHolder>{
private List<ListItem> ListData;
private LayoutInflater inflater;
private ItemClickCallback itemClickCallback;
public interface ItemClickCallback{
void onItemClick(int p);
void onSecondaryIconClick(int p);
}
public void setItemClickCallback(final ItemClickCallback itemClickCallback){
this.itemClickCallback = itemClickCallback;
}
public DerpAdapter(List<ListItem> listData, Context c){
this.inflater = LayoutInflater.from(c);
this.ListData = listData;
}
#Override
public DerpHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_row,parent,false);
return new DerpHolder(view);
}
#Override
public void onBindViewHolder(DerpHolder holder, int position) {
ListItem item = ListData.get(position);
holder.title.setText(item.getTitle());
holder.subtitle.setText(item.getSubtitle());
holder.gaga.setText(item.getGaga());
}
#Override
public int getItemCount() {
return ListData.size();
}
class DerpHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
private TextView title;
private TextView subtitle;
private TextView gaga;
public DerpHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.lbl_item_text);
subtitle = (TextView) itemView.findViewById(R.id.lbl_item_sub_title);
gaga = (TextView) itemView.findViewById(R.id.gaga);
}
#Override
public void onClick(View view) {
/* if(view.getId() == R.id.cont_item_root){
}else{
}*/
}
}
this is my list item:
public class ListItem {
private String title;
private String subtitle;
private String gaga;
public String getGaga() {
return gaga;
}
public void setGaga(String gaga) {
this.gaga = gaga;
}
public ListItem(String title, String subtitle, String gaga) {
this.title = title;
this.subtitle = subtitle;
this.gaga = gaga;
}
public void setSubtitle(String subtitle) {
this.subtitle = subtitle;
}
public String getSubtitle() {
return subtitle;
}
public void setTitle(String title) {
this.title = title;
}
public String getTitle() {
return title;
}
and finally this is my mainActivity:
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private DerpAdapter adapter;
private final String url_Data = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
List<ListItem> data ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView) findViewById(R.id.drawarlist);
//Layout Manager: GridLayoutManager or StaggerdeGridLayoutManager
recyclerView.setLayoutManager(new LinearLayoutManager(this));
//adapter = new DerpAdapter(DerpData.getListData(), this);
recyclerView.setAdapter(adapter);
loadData();
}
public void loadData(){
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading Data");
progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.GET, url_Data,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
progressDialog.dismiss();
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray array = jsonObject.getJSONArray("soucat");
data = new ArrayList<>();
for (int i = 0; i < array.length(); i++){
JSONObject o = array.getJSONObject(i);
ListItem item = new ListItem(o.getString("soucat"),"hello","fefe");
data.add(item);
}
adapter = new DerpAdapter(data,getApplicationContext());
recyclerView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}

First, your initial setting of the adapter variable is commented out:
//adapter = new DerpAdapter(DerpData.getListData(), this);
recyclerView.setAdapter(adapter);
This will always set the adapter to null, you need to change it to this:
adapter = new DerpAdapter(DerpData.getListData(), this);
recyclerView.setAdapter(adapter);
Also, I don't see a call to start the Volley RequestQueue, make sure you are calling requestQueue.start(); before adding the stringRequest.
Then verify that that code for setting the adapter is being executed. You may always be hitting the ErrorListener which never sets the adapter.

You are trying to set null reference adapter to the RecyclerView, firstly you initialize adapter then set into the RecyclerView.

#Bobbake4 this is the code:
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private DerpAdapter adapter;
private final String url_Data = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
List<ListItem> data ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView) findViewById(R.id.drawarlist);
//Layout Manager: GridLayoutManager or StaggerdeGridLayoutManager
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new DerpAdapter(DerpData.getListData(), this);
recyclerView.setAdapter(adapter);
loadData();
}
public void loadData(){
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading Data");
progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.GET, url_Data,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
progressDialog.dismiss();
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray array = jsonObject.getJSONArray("soucat");
data = new ArrayList<>();
for (int i = 0; i < array.length(); i++){
JSONObject o = array.getJSONObject(i);
ListItem item = new ListItem(o.getString("soucat"),"hello","fefe");
data.add(item);
}
adapter = new DerpAdapter(data,getApplicationContext());
recyclerView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.start();
requestQueue.add(stringRequest);
}

how to set on click listener on recyclerview and open a static page and get content from json url

i have a series of items in recyclerview .i want to set on click listener and open a description page of specific item and set data from json url. i have already made an adapter for description screen and a bean class. i dont know how to set adapter on layout. is it possible to set an adapter on linear layout to show static content from json url?
My code is :
Description activity
private class MakeRequestForGetDescription extends AsyncTask<String, Void, String> {
ProgressDialog Pdialog;
private String response;
private MakeServiceClass makeServiceClass = new MakeServiceClass();
#Override
protected void onPreExecute() {
Pdialog = new ProgressDialog(getActivity());
Pdialog.setMessage("Please Wait..");
Pdialog.show();
}
#Override
protected String doInBackground(String... params) {
try {
HashMap<String, String> parms = new HashMap<String, String>();
response = makeServiceClass.makeServiceConnectionGet(ConstUrl.DESCRP_URLS);
Log.e("response ads", response);
} catch (Exception ex) {
ex.printStackTrace();
}
return response;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(response);
if (Pdialog != null) {
Pdialog.dismiss();
}
if (response != null) {
try {
JSONObject mainObject = new JSONObject(response);
if (mainObject.has("status")) {
String Status = mainObject.getString("status");
String img_url = "";
if (Status.equalsIgnoreCase("200")) {
if (mainObject.has("img_url")) {
img_url = mainObject.getString("img_url");
Log.e("img_url", img_url);
}
if (mainObject.has("details")) {
JSONArray datArray = mainObject.getJSONArray("details");
descriptionBeanArrayList = new ArrayList<>();
if (datArray.length() > 0) {
for (int i = 0; i < datArray.length(); i++) {
DescriptionBean descriptionBean = new DescriptionBean();
JSONObject internalDataObject = datArray.getJSONObject(i);
if (internalDataObject.has("id")) {
descriptionBean.setId(internalDataObject.getString("id"));
}
if (internalDataObject.has("title_en")) {
descriptionBean.setTitle_en(internalDataObject.getString("title_en"));
}
if (internalDataObject.has("ad_description_en")) {
descriptionBean.setAd_description_en(internalDataObject.getString("ad_description_en"));
}
if (internalDataObject.has("price")) {
descriptionBean.setPrice(internalDataObject.getString("price"));
}
if (internalDataObject.has("km_driven")) {
descriptionBean.setKm_driven(internalDataObject.getString("km_driven"));
}
if (internalDataObject.has("image_file")) {
descriptionBean.setImage_file("http://" + img_url + internalDataObject.getString("image_file"));
}
descriptionBeanArrayList.add(descriptionBean);
}
setAdapterForDescription();
}
}
} else {
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
private void setAdapterForDescription() {
DescriptionAdapter adapter = new DescriptionAdapter(getActivity(), descriptionBeanArrayList);
}
}
Description Adapter
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder; // view lookup cache stored in tag
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(mContext);
convertView = inflater.inflate(R.layout.fragment_description, parent,false);
viewHolder.tvTitle = (TextView) convertView.findViewById(R.id.tvTitle);
viewHolder.tvRate = (TextView) convertView.findViewById(R.id.tvRate);
viewHolder.tvMiles = (TextView) convertView.findViewById(R.id.tvMiles);
viewHolder.et_description = (EditText) convertView.findViewById(R.id.et_description);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
//setdata
viewHolder.tvTitle.setText(descriptionBeanArrayList.get(position).getTitle_en());
viewHolder.tvRate.setText(descriptionBeanArrayList.get(position).getPrice());
viewHolder.tvMiles.setText(descriptionBeanArrayList.get(position).getKm_driven());
viewHolder.et_description.setText(descriptionBeanArrayList.get(position).getAd_description_en());
Log.e("s", descriptionBeanArrayList.get(position).getImage_file());
//Glide.with(mContext).load("www.apnikheti.com/upload/buysell/idea99A4.jpg").into(viewHolder.iv_picofproduct);
Picasso.with(mContext).load(descriptionBeanArrayList.get(position).getImage_file()).into(viewHolder.iv_picofproduct, new Callback() {
#Override
public void onSuccess() {
Log.e("s", "sucess");
}
#Override
public void onError() {
Log.e("s", "failed");
}
});
Picasso.with(mContext).setLoggingEnabled(true);
return convertView;
}
public class ViewHolder {
private TextView tvTitle,tvRate,tvMiles;
private EditText et_description;
public ImageView iv_picofproduct;
}
}

This is my code which is used to retrieve data from url (Json Data) and load it into a recyclerview using adapter and passing the same values to another activity.
MyActivity
public class Video_List extends AppCompatActivity {
private RecyclerView recyclerView;
private RecyclerView.LayoutManager layoutManager;
private RecyclerView.Adapter adapter;
//private GridLayoutManager layoutManager;
private List<Video_Details> videodetails;
public static final String VideoID = "v_id";
public static final String ID = "id";
public static final String Title = "title";
public static final String Thumb = "thumb";
public static final String url = "http://115.115.122.10/paul/api/videos.php?start=1&count=10";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video__list);
getdata();
recyclerView = (RecyclerView) findViewById(R.id.card_recycler_view);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
//layoutManager = new GridLayoutManager(this,2);
recyclerView.setLayoutManager(layoutManager);
videodetails = new ArrayList<>();
}
private void getdata(){
final ProgressDialog loading = ProgressDialog.show(this,"Loading Data", "Please wait...",false,false);
final JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
//Dismissing progress dialog
loading.dismiss();
Log.d("count",response.toString());
//calling method to parse json array
parseData(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
loading.dismiss();
Log.d("infoz","777"+error.getMessage());
Toast.makeText(getApplicationContext(),"No data Found",Toast.LENGTH_LONG).show();
}
});
//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){
try {
for (int i = 0; i < array.length(); i++) {
JSONObject json = array.getJSONObject(i);
Video_Details video = new Video_Details();
if (json.has(VideoID)) {
Log.d("has values", json.getString(VideoID));
}
video.setId(json.getString(ID));
video.setV_id(json.getString(VideoID));
video.setTitle(json.getString(Title));
video.setThumb(json.getString(VideoID));
videodetails.add(video);
if (json.has(VideoID))
{
Log.d("Video",VideoID);
}
}
} catch (Exception e) {
e.printStackTrace();
}
//Finally initializing our adapter
adapter = new DataAdapter(videodetails, this);
//Adding adapter to recyclerview
recyclerView.setAdapter(adapter);
}
}
MyAdapter
public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {
private Context context;
List<Video_Details> video;
public DataAdapter(List<Video_Details> video, Context context) {
super();
this.context = context;
this.video = video;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_row, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final Video_Details videoDetails = video.get(position);
String url;
final String VideoID;
holder.title.setText(video.get(position).getTitle());
VideoID= video.get(position).getV_id();
url = video.get(position).getThumb();
Glide.with(context)
.load(url)
.override(150,70)
.into(holder.thumb);
//viewHolder.thumb.setText(android.get(i).getVer());
// viewHolder.tv_api_level.setText(android.get(i).getApi());
holder.vm.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "You Clicked"+video.get(position).getV_id(), Toast.LENGTH_SHORT).show();
Intent intent = new Intent(v.getContext(),Play_Video.class);
intent.putExtra("VideoId",(video.get(position).getV_id()));
intent.putExtra("Title",(video.get(position).getTitle()));
v.getContext().startActivity(intent);
}
}
);
}
#Override
public int getItemCount() {
return video.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView title;
public ImageView thumb;
public String videoid;
public View vm;
public ViewHolder(View view) {
super(view);
vm = view;
title = (TextView)view.findViewById(R.id.title);
thumb = (ImageView) view.findViewById(R.id.thumb);
//tv_version = (TextView)view.findViewById(R.id.tv_version);
//tv_api_level = (TextView)view.findViewById(R.id.tv_api_level);
}
}
}

i want to slide images ,images are coming through json

i want to slide images ,images are coming through json . Using of this code it is coming in list view . But i want all ten images should come as a slider .How van i do this?
I want to slide image one by one in horizontal.
i am getting like this image
see in the image .
MainActivity
public class MainActivity extends Activity {
// Log tag
private static final String TAG = MainActivity.class.getSimpleName();
private static final String url = "http://20dde605.ngrok.io/api/v1/restaurants/get_featured_restaurants";
// Movies json url
//private static final String url = "http://api.androidhive.info/json/movies.json";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();
private ListView listView;
private CustomListAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list);
adapter = new CustomListAdapter(this, movieList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(this);
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// changing action bar color
getActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor("#1b1b1b")));
// Creating volley request obj
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Movie movie = new Movie();
//movie.setTitle(obj.getString("title"));
//movie.setName(obj.getString("name"));
//movie.setThumbnailUrl(obj.getString("image"));
movie.setThumbnailUrl(obj.getString("org_image_url"));
//movie.setAverage_ratings(obj.getString("average_ratings"));
//movie.setCuisine(obj.getString("cuisine"));
//movie.setAddress(obj.getJSONObject("address").getString("area"));
//movie.setAddress(obj.getString("address"));
//movie.setYear(obj.getInt("releaseYear"));
// Genre is json array
/*JSONArray genreArry = obj.getJSONArray("genre");
ArrayList<String> genre = new ArrayList<String>();
for (int j = 0; j < genreArry.length(); j++) {
genre.add((String) genreArry.get(j));
}
movie.setGenre(genre);*/
// adding movie to movies array
movieList.add(movie);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(movieReq);
}
#Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Appcontroller.java
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;
private static AppController mInstance;
#Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public ImageLoader getImageLoader() {
getRequestQueue();
if (mImageLoader == null) {
mImageLoader = new ImageLoader(this.mRequestQueue,
new LruBitmapCache());
}
return this.mImageLoader;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
// set the default tag if tag is empty
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
model -movie
public class Movie {
private String name, thumbnailUrl;
//private int year;
private String average_ratings,area,cuisine,address;
// private ArrayList<String> genre;
public Movie() {
}
public Movie(String name, String thumbnailUrl, String average_ratings,String area,String cuisine,String address
) {
this.name = name;
this.thumbnailUrl = thumbnailUrl;
//this.year = year;
this.average_ratings = average_ratings;
this.area=area;
this.cuisine=cuisine;
this.address=address;
//this.genre = genre;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getThumbnailUrl() {
return thumbnailUrl;
}
public void setThumbnailUrl(String thumbnailUrl) {
this.thumbnailUrl = thumbnailUrl;
}
/*public int getYear() {
return year;
}*/
/*public void setYear(int year) {
this.year = year;
}*/
public String getAverage_ratings() {
return average_ratings;
}
public void setAverage_ratings(String average_ratings) {
this.average_ratings = average_ratings;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getCuisine() {
return cuisine;
}
public void setCuisine(String cuisine) {
this.cuisine = cuisine;
}
/*public ArrayList<String> getGenre() {
return genre;
}
public void setGenre(ArrayList<String> genre) {
this.genre = genre;
}
*/
}
LruBitmapcache
public class LruBitmapCache extends LruCache<String, Bitmap> implements
ImageCache {
public static int getDefaultLruCacheSize() {
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
final int cacheSize = maxMemory / 8;
return cacheSize;
}
public LruBitmapCache() {
this(getDefaultLruCacheSize());
}
public LruBitmapCache(int sizeInKiloBytes) {
super(sizeInKiloBytes);
}
#Override
protected int sizeOf(String key, Bitmap value) {
return value.getRowBytes() * value.getHeight() / 1024;
}
#Override
public Bitmap getBitmap(String url) {
return get(url);
}
#Override
public void putBitmap(String url, Bitmap bitmap) {
put(url, bitmap);
}
}

Use <ViewFlipper> or <ViewPager> or use ImageSlider library.

I better suggest to use pager for the slideshow. For you reference: to use pager
For another thing we can even use timer:
public void makescroll() {
final Handler mHandler= new Handler();
// Create runnable for posting
final Runnable mUpdateResults = new Runnable() {
public void run() {
AnimateandSlideShow(); //display image of your arraylist
}
};
int delay = 5000; // delay for 1 sec.
int period = 5000; // repeat every 4 sec.
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
mHandler.post(mUpdateResults);
}
}, delay, period);
}

I would recommend RecyclerView over normal ListView for better performance and more customizable.
RecyclerView support horizontal lists but setting LinearLayoutManager as follows:
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
recyclerView.setLayoutManager(linearLayoutManager);

JSON parser app freezes on running

I am trying to create an app that parses data from a JSON parser and populates the recyclerview items with the data fetch from the JSON but whenever I run it it just freezes at loading and shows no error except adapter not attached skipping layout. I am stuck at a dead end as I am not able to get any further. How can I fix this what is the problem with the code .
MainActivity
public class MainActivity extends AppCompatActivity {
CollapsingToolbarLayout collapsingToolbarLayout;
ImageView image;
TextView personName;
TextView personProf;
RecyclerView rv;
private List<Person> personList;
private RecyclerView.LayoutManager layoutManager;
private RecyclerView.Adapter adapter;
ImageView images;
RecyclerViewHeader header;
ImageView iv;
public String strurl;
URL url;
URI uri;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
personName= (TextView)findViewById(R.id.textView);
personProf=(TextView)findViewById(R.id.textView2);
images= (ImageView)findViewById(R.id.imageView);
setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
collapsingToolbarLayout.setTitle("Capsule");
collapsingToolbarLayout.setExpandedTitleColor(getResources().getColor(android.R.color.transparent));
//setPalette();
strurl = "http://www.humanfox.com/capsule/assets/img/jawed_headshot.jpg";
Typeface face2 = Typeface.createFromAsset(getAssets(),"fonts/OpenSans-Regular.ttf");
Typeface face4= Typeface.createFromAsset(getAssets(),"fonts/OpenSans-Bold.ttf");
image = (ImageView) findViewById(R.id.image);
Picasso.with(this)
.load("http://d152j5tfobgaot.cloudfront.net/wp-content/uploads/2013/06/Javed-Habib_11.jpg")
.into(image);
//header = (RecyclerViewHeader) findViewById(R.id.header);
//header.attachTo(rv,true);
rv =(RecyclerView)findViewById(R.id.rv);
rv.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(this);
rv.setLayoutManager(llm);
personList= new ArrayList<>();
getData();
}
private void getData(){
//Showing a progress dialog
final ProgressDialog loading = ProgressDialog.show(this,"Loading Data", "Please wait...",false,false);
//Creating a json array request
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(COnfig.DATA_URL,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
//Dismissing progress dialog
loading.dismiss();
//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);
}
private void parseData(JSONArray array) {
for (int i = 0; i < array.length(); i++) {
Person per = new Person();
JSONObject json = null;
try {
json = array.getJSONObject(i);
per.setImageUrl(json.getString(COnfig.TAG_IMAGE_URL));
per.setName(json.getString(COnfig.TAG_NAME));
per.setPassion(json.getString(COnfig.TAG_PROFESSION));
} catch (JSONException e) {
e.printStackTrace();
}
personList.add(per);
}
adapter = new RVAdapter(personList, this);
rv.setAdapter(adapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}
}
Recycler view Adapter
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
private ImageLoader imageLoader;
Context context;
private List<Person> persons;
RVAdapter(List<Person> persons,Context context){
this.persons = persons;
this.context = context;
}
#Override
public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item,viewGroup,false);
PersonViewHolder pvh = new PersonViewHolder(v);
return pvh;
}
#Override
public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
imageLoader = CustomVolleyRequest.getInstance(context).getImageLoader();
imageLoader.get(persons.get(i).getImageUrl(), ImageLoader.getImageListener(personViewHolder.personPhoto, R.drawable.ic_launcher, android.R.drawable.ic_dialog_alert));
personViewHolder.personName.setText(persons.get(i).getName());
personViewHolder.personProf.setText(persons.get(i).getPassion());
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public int getItemCount() {
return persons.size();
}
public static class PersonViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
CardView cv;
TextView personName;
TextView personProf;
ImageView personPhoto;
Context context;
PersonViewHolder(final View itemView) {
super(itemView);
context = itemView.getContext();
itemView.setClickable(true);
itemView.setOnClickListener(this);
cv = (CardView) itemView.findViewById(R.id.cv);
personName = (TextView) itemView.findViewById(R.id.textView);
personProf = (TextView) itemView.findViewById(R.id.textView2);
personPhoto=(ImageView) itemView.findViewById(R.id.imageView);
}
#Override
public void onClick(View view) {
final Intent intent;
int position =getAdapterPosition();
switch(position){
case 0:
context.startActivity(new Intent(context,caps1.class));
}
}
}
}
Custom Volley Request
public class CustomVolleyRequest {
private static CustomVolleyRequest customVolleyRequest;
private static Context context;
private RequestQueue requestQueue;
private ImageLoader imageLoader;
private CustomVolleyRequest(Context context) {
this.context = context;
this.requestQueue = getRequestQueue();
imageLoader = new ImageLoader(requestQueue,
new ImageLoader.ImageCache() {
private final LruCache<String, Bitmap>
cache = new LruCache<String, Bitmap>(20);
#Override
public Bitmap getBitmap(String url) {
return cache.get(url);
}
#Override
public void putBitmap(String url, Bitmap bitmap) {
cache.put(url, bitmap);
}
});
}
public static synchronized CustomVolleyRequest getInstance(Context context) {
if (customVolleyRequest == null) {
customVolleyRequest = new CustomVolleyRequest(context);
}
return customVolleyRequest;
}
public RequestQueue getRequestQueue() {
if (requestQueue == null) {
Cache cache = new DiskBasedCache(context.getCacheDir(), 10 * 1024 * 1024);
Network network = new BasicNetwork(new HurlStack());
requestQueue = new RequestQueue(cache, network);
requestQueue.start();
}
return requestQueue;
}
public ImageLoader getImageLoader() {
return imageLoader;
}
}

Make sure you have implemented send request and parse json on background thread not in Main thread. Otherwise, it will freeze because of your main thread can do one task and should do UI update not all tasks together.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android MySql Volley RecyclerView NetworkImage - android

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JSON parser app freezes on running

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