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how to add like button in Recyclerview in android

I am a new application developer android app and need some help Please.
I need to know how to add the like button inside (Recyclerview) linked to a database (Mysql) and connect through a Volley library to save all user likes.And see how many likes each topic has.
An example that is in the picture..
I need to add it to this attached project.
MainActivity
public class MainActivity extends AppCompatActivity {
List<RecyclerViewData> recyclerViewDataList;
RecyclerView recyclerView;
private RVAdapter rvAdapter;
private static final String TAG="apple";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("Employee List");
recyclerViewDataList=new ArrayList<>();
recyclerView=findViewById(R.id.recyclerView);
LinearLayoutManager linearLayoutManager=new LinearLayoutManager(this);
recyclerView.setLayoutManager(linearLayoutManager);
MakeVolleyConnection();
}
private void MakeVolleyConnection() {
recyclerViewDataList = new ArrayList<>();
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET,
"http://10.0.13.45/v/parsing.php", null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray dataArray = response.getJSONArray("data");
for (int i = 0; i < dataArray.length(); i++) {
JSONObject userData = dataArray.getJSONObject(i);
RecyclerViewData recyclerViewData = new RecyclerViewData();
recyclerViewData.setId(userData.getInt("id"));
recyclerViewData.setFirstname(userData.getString("first_name"));
recyclerViewData.setLastname(userData.getString("last_name"));
recyclerViewData.setAvatar(userData.getString("avatar"));
recyclerViewDataList.add(recyclerViewData);
}
rvAdapter = new RVAdapter(recyclerViewDataList, MainActivity.this);
recyclerView.setAdapter(rvAdapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this, ""+error.networkResponse,Toast.LENGTH_SHORT).show();
}
});
MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest);
}
}
MySingleton
public class MySingleton {
private static MySingleton mInstance;
private RequestQueue mRequestQueue;
private static Context mContext;
private MySingleton(Context context){
// Specify the application context
mContext = context;
// Get the request queue
mRequestQueue = getRequestQueue();
}
public static synchronized MySingleton getInstance(Context context){
// If Instance is null then initialize new Instance
if(mInstance == null){
mInstance = new MySingleton(context);
}
// Return MySingleton new Instance
return mInstance;
}
public RequestQueue getRequestQueue(){
// If RequestQueue is null the initialize new RequestQueue
if(mRequestQueue == null){
mRequestQueue = Volley.newRequestQueue(mContext.getApplicationContext());
}
// Return RequestQueue
return mRequestQueue;
}
public<T> void addToRequestQueue(Request<T> request){
// Add the specified request to the request queue
getRequestQueue().add(request);
}
}
RecyclerViewData
public class RecyclerViewData {
private int id;
private String firstname;
private String lastname;
private String avatar;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getAvatar() {
return avatar;
}
public void setAvatar(String avatar) {
this.avatar = avatar;
}
}
RVAdapter
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.RVHOLDER> {
List<RecyclerViewData> recyclerViewDataList;
Context mContext;
// Constructor with List and Context which we'll pass from RecyclerView Activity after a connection to Volley. And application context for the listener that we'll implement this later.
public RVAdapter(List<RecyclerViewData> recyclerViewDataList, Context mContext) {
this.recyclerViewDataList = recyclerViewDataList;
this.mContext = mContext;
}
// Override the method onCreateViewHolder, which will call the custom view holder that needs to be initialized. We specify the layout that each item to be used, so we can achieve this using Layout Inflator to inflate the layout and passing the output to constructor of custom ViewHolder.
#NonNull
#Override
public RVHOLDER onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View itemView = LayoutInflater.from(mContext).inflate(R.layout.adapter_layout, viewGroup, false);
RVHOLDER rvholder = new RVHOLDER(itemView);
return rvholder;
}
//onBindViewHolder is for specifying the each item of RecyclerView. This is very similar to getView() method on ListView. In our example, this is where you need to set the user's id, name and image.
#Override
public void onBindViewHolder(#NonNull RVHOLDER rvholder, int i) {
rvholder.id.setText("User id is "+recyclerViewDataList.get(i).getId());
rvholder.first_name.setText(recyclerViewDataList.get(i).getFirstname() + " " + recyclerViewDataList.get(i).getLastname());
Picasso.get().load(recyclerViewDataList.get(i).getAvatar()).into(rvholder.avatar);
}
//We need to return the size for RecyclerView as how long a RecyclerView is, Our data is in list so passing data.size() will return the number as long as we have.
#Override
public int getItemCount() {
return recyclerViewDataList.size();
}
//This is CustomView holder that we had discuss it earlier above and inflated it in onCreateView() method. This constructor links with the xml to set the data, which we set into onBindViewHolder().
class RVHOLDER extends RecyclerView.ViewHolder {
TextView id;
private TextView first_name;
private ImageView avatar;
public RVHOLDER(#NonNull View itemView) {
super(itemView);
id = itemView.findViewById(R.id.id);
first_name = itemView.findViewById(R.id.firstname_lastname);
avatar = itemView.findViewById(R.id.avatar);
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardCornerRadius="4dp"
card_view:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/avatar"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginRight="16dp"
android:scaleType="fitCenter" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/firstname_lastname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:textAppearanceMedium" />
<TextView
android:id="#+id/id"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</RelativeLayout>
<?php
$con=mysqli_connect("localhost","root","root","test");
$sql="SELECT * FROM testtable";
$result=mysqli_query($con,$sql);
$data=array();
while($row=mysqli_fetch_assoc($result)){
$data["data"][]=$row;
}
header('Content-Type:Application/json');
echo json_encode($data);
?>

#Override
public void onBindViewHolder(#NonNull RVHOLDER rvholder, int i) {
rvholder.id.setText("User id is "+recyclerViewDataList.get(i).getId());
rvholder.first_name.setText(recyclerViewDataList.get(i).getFirstname() + " " +
recyclerViewDataList.get(i).getLastname());
Picasso.get().load(recyclerViewDataList.get(i).getAvatar()).into(rvholder.avatar);
if()
}
if (recyclerViewDataList.get(i).getLiked()) {
// liked image
Picasso.get().load(gContextCompat.getDrawable(getActivity(), R.drawable.liked);).into(rvholder.like);
} else {
// without like image
Picasso.get().load(gContextCompat.getDrawable(getActivity(), R.drawable.not_like);).into(rvholder.like);
}
Add like boolean variable in RecyclerViewData Class. Add getter and setter of it. Add two drawables in drawable folder for Like and Not_like. Then Add this logic. Hope this will help. Thanks

#Override
public void onBindViewHolder(#NonNull RVHOLDER rvholder, int i) {
rvholder.id.setText("User id is "+recyclerViewDataList.get(i).getId());
rvholder.first_name.setText(recyclerViewDataList.get(i).getFirstname() + " " + recyclerViewDataList.get(i).getLastname());
Picasso.get().load(recyclerViewDataList.get(i).getAvatar()).into(rvholder.avatar);
Picasso.get().load(gContextCompat.getDrawable(getActivity(), if(recyclerViewDataList.get(i).getLiked())R.drawable.liked else R.drawable.not_like).into(rvholder.like);
}

ListView not displayed in Fragment (Android)

So im following this tutorial http://www.wingnity.com/blog/android-json-parsing-and-image-loading-tutorial/ on how to parse a JSON Api and displays data into Listview
I tried to adapt the code in my fragment , in onCreateView method , but the Listview is not displayed (blank fragment). And i dont know why.
I imported all the required libs
Actor.java
public class Actors {
private String name;
private String description;
private String dob;
private String country;
private String height;
private String spouse;
private String children;
private String image;
public Actors() {
// TODO Auto-generated constructor stub
}
public Actors(String name, String description, String dob, String country,
String height, String spouse, String children, String image) {
super();
this.name = name;
this.description = description;
this.dob = dob;
this.country = country;
this.height = height;
this.spouse = spouse;
this.children = children;
this.image = image;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getHeight() {
return height;
}
public void setHeight(String height) {
this.height = height;
}
public String getSpouse() {
return spouse;
}
public void setSpouse(String spouse) {
this.spouse = spouse;
}
public String getChildren() {
return children;
}
public void setChildren(String children) {
this.children = children;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
ActorAdapter.java
import java.io.InputStream;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import info.androidhive.navigationdrawer.R;
public class ActorAdapter extends ArrayAdapter<Actors> {
ArrayList<Actors> actorList;
LayoutInflater vi;
int Resource;
ViewHolder holder;
public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
super(context, resource, objects);
vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
actorList = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
holder.tvName = (TextView) v.findViewById(R.id.tvName);
holder.tvDescription = (TextView) v.findViewById(R.id.tvDescriptionn);
holder.tvDOB = (TextView) v.findViewById(R.id.tvDateOfBirth);
holder.tvCountry = (TextView) v.findViewById(R.id.tvCountry);
holder.tvHeight = (TextView) v.findViewById(R.id.tvHeight);
holder.tvSpouse = (TextView) v.findViewById(R.id.tvSpouse);
holder.tvChildren = (TextView) v.findViewById(R.id.tvChildren);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.imageview.setImageResource(R.drawable.imgadd);
new DownloadImageTask(holder.imageview).execute(actorList.get(position).getImage());
holder.tvName.setText(actorList.get(position).getName());
holder.tvDescription.setText(actorList.get(position).getDescription());
holder.tvDOB.setText("B'day: " + actorList.get(position).getDob());
holder.tvCountry.setText(actorList.get(position).getCountry());
holder.tvHeight.setText("Height: " + actorList.get(position).getHeight());
holder.tvSpouse.setText("Spouse: " + actorList.get(position).getSpouse());
holder.tvChildren.setText("Children: " + actorList.get(position).getChildren());
return v;
}
static class ViewHolder {
public ImageView imageview;
public TextView tvName;
public TextView tvDescription;
public TextView tvDOB;
public TextView tvCountry;
public TextView tvHeight;
public TextView tvSpouse;
public TextView tvChildren;
}
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
Articles.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/ivImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:src="#drawable/imgadd" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tom Cruise"
android:textColor="#166CED"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/tvDateOfBirth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#D64530"
android:text="Date of Birth: July 3, 1962" />
<TextView
android:id="#+id/tvHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Height: 1.80 m"
android:textColor="#D64530"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="#+id/tvCountry"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#D64530"
android:text="United States" />
</LinearLayout>
</LinearLayout>
<TextView
android:id="#+id/tvDescriptionn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#009A57"
android:text="Description" />
<TextView
android:id="#+id/tvSpouse"
android:layout_width="wrap_content" android:textColor="#166CED"
android:layout_height="wrap_content"
android:text="Spouse: Katie Holmes" />
<TextView
android:id="#+id/tvChildren"
android:layout_width="wrap_content" android:textColor="#166CED"
android:layout_height="wrap_content"
android:text="Children: Suri Cruise, Isabella Jane Cruise, Connor Cruise" />
</LinearLayout>
Fragment_accueil.xml (my fragment layout)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical"
tools:context="info.androidhive.navigationdrawer.fragment.AccueilFragment">
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:listitem="#layout/articles">
</ListView>
</LinearLayout>
fragment_accueil.java (my fragment activity)
//import.....
public class AccueilFragment extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
int score = 0;
TextView t1, t2, t3,t4;
ImageView img;
private OnFragmentInteractionListener mListener;
public AccueilFragment() {
}
public static AccueilFragment newInstance(String param1, String param2) {
AccueilFragment fragment = new AccueilFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_accueil, container, false);
t1 = (TextView) view.findViewById(R.id.tvName);
t2 = (TextView) view.findViewById(R.id.tvDateOfBirth);
t3 = (TextView) view.findViewById(R.id.tvHeight);
t3 = (TextView) view.findViewById(R.id.tvCountry);
img = (ImageView) view.findViewById(R.id.ivImage);
ArrayList actorsList = new ArrayList<Actors>();
ListView listview = (ListView) view.findViewById(R.id.list);
ListAdapter adapter = new ActorAdapter(getActivity().getApplicationContext(), R.layout.articles, actorsList);
listview.setAdapter(adapter);
new getData().execute();
return view;
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
class getData extends AsyncTask<String, String, String> {
HttpURLConnection urlConnection;
#Override
protected String doInBackground(String... args) {
StringBuilder result = new StringBuilder();
try {
URL url = new URL("http://microblogging.wingnity.com/JSONParsingTutorial/jsonActors");
urlConnection = (HttpURLConnection) url.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
urlConnection.disconnect();
}
return result.toString();
}
#Override
protected void onPostExecute(String result) {
try {
JSONObject jsono = new JSONObject(result);
JSONArray jarray = jsono.getJSONArray("actors");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.setName(object.getString("name"));
actor.setDescription(object.getString("description"));
actor.setDob(object.getString("dob"));
actor.setCountry(object.getString("country"));
actor.setHeight(object.getString("height"));
actor.setSpouse(object.getString("spouse"));
actor.setChildren(object.getString("children"));
actor.setImage(object.getString("image"));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Uri uri);
}
}
What's the problem and how to fix that ? thanks

There is couple of things wrong:
1.You are not adding Actors actor = new Actors(); to the actorsList
2.Calling this:
ArrayList actorsList = new ArrayList<Actors>();
ListView listview = (ListView) view.findViewById(R.id.list);
ListAdapter adapter = new ActorAdapter(getActivity().getApplicationContext(), R.layout.articles, actorsList);
will reuslt in blank data in listview
I would suggest you to add the data in your onPostExecute() to the Arraylist and then initialize the adapter with the data.
or you can also call
adapter.notifyDataSetChanged() in onPostExecute()

Are you adding the ListView in your fragment that you want it to be displayed for example:
public class FragmentMain extends Fragment
{
private ListView listView; //Define the list view up here.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//Set the listview equal to the fragment name
listView = inflater.inflate(R.layout.fragment_name, container, false);
}
}
This should work, let me know if otherwize :)

Android Json with searchview

I'm having troubles with adding a searchview to a Json results. I can use the searchview without the Json, but not together.
In this example, If I write something on the searchview, all the gridview disappears. It´s like the searchview doesn´t receive anything.
I made the Json from this tutorial: http://www.wingnity.com/blog/android-json-parsing-and-image-loading-tutorial/
And the searchview from this: http://abhiandroid.com/ui/searchview
The results I have in a Gridview
public class Tab3
#SuppressWarnings("deprecation")
public class Tab3 extends Fragment implements SearchView.OnQueryTextListener {
SearchView editsearch;
GridView lv;
ArrayList < Actors > actorsList = new ArrayList < > ();
ActorAdapter adapter;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View vw = inflater.inflate(R.layout.search_view, container, false);
GridView gridview = (GridView) vw.findViewById(R.id.gridviewFilms);
ArrayList < Actors > actorsList = getAllItemObject();
ActorAdapter customAdapter = new ActorAdapter(getActivity(), R.layout.jsonparsedata_item, actorsList);
gridview.setAdapter(customAdapter);
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView < ? > parent, View view, int position, long id) {
Intent filmInfo = new Intent(getContext(), FilmInfo.class);
filmInfo.putExtra("position", position);
startActivity(filmInfo);
}
});
new JSONAsynTask().execute("http://microblogging.wingnity.com/JSONParsingTutorial/jsonActors");
// adapter = new ActorAdapter(getActivity(), R.layout.jsonparsedata_item, actorsList);
// Locate the ListView in listview_main.xml
lv = (GridView) vw.findViewById(R.id.gridviewFilms);
// Pass results to ListViewAdapter Class
adapter = new ActorAdapter(getActivity(), R.layout.jsonparsedata_item, actorsList);
// Binds the Adapter to the ListView
lv.setAdapter(adapter);
editsearch = (SearchView) vw.findViewById(R.id.search);
editsearch.setOnQueryTextListener(this);
return vw;
}
class JSONAsynTask extends AsyncTask < String, Void, Boolean > {
String result;
#Override
protected Boolean doInBackground(String...urls) {
try {
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsono = new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("actors");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.setName(object.getString("name"));
actor.setDescription(object.getString("description"));
actor.setDob(object.getString("dob"));
actor.setCountry(object.getString("country"));
actor.setHeight(object.getString("height"));
actor.setSpouse(object.getString("spouse"));
actor.setChildren(object.getString("children"));
actor.setImage(object.getString("image"));
actorsList.add(actor);
}
return true;
}
} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
adapter.notifyDataSetChanged();
if (result == false) {
Toast.makeText(getActivity(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}
}
}
private ArrayList < Actors > getAllItemObject() {
//esto devuelve los valores a los titulos. Esta muy guarro, deberia de estarlo arriba
return actorsList;
}
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
String text = newText;
adapter.filter(text);
return false;
}
}
public class ActorAdapter
public class ActorAdapter extends ArrayAdapter < Actors > {
// ArrayList<Actors> actorList;
LayoutInflater vi;
int Resource;
ViewHolder holder;
private List < Actors > animalNamesList = null;
private ArrayList < Actors > arraylist;
public ActorAdapter(Context context, int resource, ArrayList < Actors > objects) {
super(context, resource, objects);
vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
// this.actorList = objects;
this.animalNamesList = objects;
this.arraylist = new ArrayList < Actors > ();
this.arraylist.addAll(objects);
}
static class ViewHolder {
public ImageView imageview;
public TextView tvName;
public TextView tvDescription;
public TextView tvDOB;
public TextView tvCountry;
public TextView tvHeight;
public TextView tvSpouse;
public TextView tvChildren;
}
#Override
public int getCount() {
return animalNamesList.size();
}
#Override
public Actors getItem(int position) {
return animalNamesList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.imageview = (ImageView) v.findViewById(R.id.cover);
holder.tvName = (TextView) v.findViewById(R.id.name);
holder.tvCountry = (TextView) v.findViewById(R.id.director);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.imageview.setImageResource(R.drawable.clapboard);
new DownloadImageTask(holder.imageview).execute(animalNamesList.get(position).getImage());
holder.tvName.setText(animalNamesList.get(position).getName());
holder.tvCountry.setText(animalNamesList.get(position).getCountry());
return v;
}
private class DownloadImageTask extends AsyncTask < String,
Void,
Bitmap > {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String...urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream( in );
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
animalNamesList.clear();
if (charText.length() == 0) {
animalNamesList.addAll(arraylist);
} else {
for (Actors wp: arraylist) {
if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText)) {
animalNamesList.add(wp);
}
}
}
notifyDataSetChanged();
}
}
public class Actors
public class Actors {
private String name;
private String description;
private String dob;
private String country;
private String height;
private String spouse;
private String children;
private String image;
public Actors() {
// TODO Auto-generated constructor stub
}
public Actors(String name, String description, String dob, String country,
String height, String spouse, String children, String image) {
super();
this.name = name;
this.description = description;
this.dob = dob;
this.country = country;
this.height = height;
this.spouse = spouse;
this.children = children;
this.image = image;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getHeight() {
return height;
}
public void setHeight(String height) {
this.height = height;
}
public String getSpouse() {
return spouse;
}
public void setSpouse(String spouse) {
this.spouse = spouse;
}
public String getChildren() {
return children;
}
public void setChildren(String children) {
this.children = children;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}}
jsonparse_fragment
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<SearchView
android:id="#+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:iconifiedByDefault="false"
android:queryHint="Pelikulen izenak..."
android:background="#f70">
<requestFocus />
</SearchView>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/gridviewTab3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="#+id/search"
android:gravity="center"
android:horizontalSpacing="4dp"
android:numColumns="2"
android:padding="4dp"
android:scrollbars="vertical"
android:scrollbarThumbVertical="#drawable/custom_scroll_style"
android:stretchMode="columnWidth"
android:verticalSpacing="4dp" />
jsonparsedata_item.xml
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
card_view:cardBackgroundColor="#color/colorText"
card_view:cardUseCompatPadding="true"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="15dp">
<RelativeLayout
android:layout_height="250dp"
android:layout_width="200dp"
android:paddingBottom="6dp">
<TextView
android:id="#+id/director"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world"
android:textColor="#color/colorTextDark"
android:textSize="10sp"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:paddingLeft="4dp" />
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world"
android:textColor="#color/colorTextDark"
android:textSize="12sp"
android:layout_above="#+id/director"
android:layout_alignParentStart="true"
android:paddingLeft="4dp" />
<ImageView
android:id="#+id/cover"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/hello_world"
android:scaleType="fitXY"
android:src="#drawable/milian"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_above="#+id/name"
android:layout_alignParentEnd="true" />
</RelativeLayout>

Unable to populate any Cards in RecyclerView, possible cause?

I am trying to populate CardView's inside a RecyclerView. Though I am able to log all the adapter values(to make sure they are non-empty) I can't populate any in the UI. Here is the Activity Code:
FoodActivity.class
public class FoodActivity extends AppCompatActivity
{
private RecyclerView foodView;
private List<Result> adapter_data;
private CustomPlacesAdapter adapter;
private LinearLayoutManager llm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_food);
foodView = (RecyclerView)findViewById(R.id.foodRView);
adapter = new CustomPlacesAdapter(adapter_data);
adapter_data = new ArrayList<>();
llm = new LinearLayoutManager(this);
foodView.setLayoutManager(llm);
foodView.setAdapter(adapter);
doGetRequest("restaurants in los angeles airport");
}
private void doGetRequest(final String message)
{
ApiInterfacePlaces apiService =
ApiClientPlaces.getClient().create(ApiInterfacePlaces.class);
Call<PlacesPojo> call = apiService.getValues(message, Util.getKeyForPlaces());
call.enqueue(new Callback<PlacesPojo>()
{
#Override
public void onResponse(Call<PlacesPojo>call, Response<PlacesPojo> response)
{
try
{
Log.e("TAG",""+response.body().toString());
List<Result> response_res = response.body().getResults();
adapter_data = response_res;
adapter.notifyDataSetChanged();
}
catch (Exception e)
{
Toast.makeText(FoodActivity.this, "Check data connection", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onFailure(Call<PlacesPojo> call, Throwable t) {
// Log error here since request failed
Log.e("FAILURE", t.toString());
}
});
}
}
Here is the code to the RecyclerView's adapter:
CustomPlacesAdapter.class
public class CustomPlacesAdapter extends RecyclerView.Adapter<CustomPlacesAdapter.HotelsViewHolder>
{
private DataHolder d2 = new DataHolder();
public class HotelsViewHolder extends RecyclerView.ViewHolder
{
private TextView hotelName;
private Typeface face;
private ImageView hotel_logo;
private Context mcontext;
HotelsViewHolder(View itemView)
{
super(itemView);
mcontext = itemView.getContext();
hotelName = (TextView)itemView.findViewById(R.id.hotelName);
face = Typeface.createFromAsset(itemView.getContext().getAssets(), "Fonts/Roboto-Regular.ttf");
hotelName.setTypeface(face);
hotel_logo = (ImageView)itemView.findViewById(R.id.logoOfHotel);
}
}
private static class DataHolder
{
List<Result> feeds;
}
public CustomPlacesAdapter(List<Result> feeds)
{
this.d2.feeds = feeds;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public HotelsViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.food_item, viewGroup, false);
HotelsViewHolder pvh = new HotelsViewHolder(v);
return pvh;
}
#Override
public void onBindViewHolder(HotelsViewHolder feedViewHolder, int i)
{
feedViewHolder.hotelName.setText(d2.feeds.get(i).getName());
Picasso.with(feedViewHolder.mcontext).load(d2.feeds.get(i).getIcon()).into(feedViewHolder.hotel_logo);
}
#Override
public int getItemCount()
{
if(d2.feeds!=null)
{
return d2.feeds.size();
}
else
{
return 0;
}
}
}
This is the CardView that I use:
food_item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_centerHorizontal="true"
app:cardCornerRadius="5dp"
android:layout_height="100dp"
card_view:cardUseCompatPadding="false"
android:id="#+id/cv">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/logoOfHotel"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/hotelName"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
</android.support.v7.widget.CardView>
Cross checked many things, still unable to fix the issue, what is possibly causing this? Any help would be much appreciated.

my RecyclerView does not show anything

Help. I don't know why my RecyclerView does not show anything. My implementation of the adapter is right. I don't know where have I gone wrong.
Here's the Fragment class:
public class RemittanceFragment extends Fragment implements View.OnClickListener {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
#BindView(R.id.remit_cancel_view)
View remitCancelView;
#BindView(R.id.remit_checkpaid_view)
View remitCheckPaidView;
#BindView(R.id.remit_create_view)
View remitCreateView;
#BindView(R.id.remit_main_menu)
View remitMainMenuView;
#BindView(R.id.btn_cancel)
Button btnCancel;
#BindView(R.id.btn_checkpaid)
Button btnCheckPaid;
#BindView(R.id.btn_create)
Button btnCreate;
#BindView(R.id.btn_back)
TextView btnGoBack;
#BindView(R.id.btn_back2)
TextView btnGoBack2;
#BindView(R.id.remit_header_title)
TextView tvRemitHeaderTitle;
#BindView(R.id.remit_cancel_list)
RecyclerView cancelRecyclerView;
public RemittanceFragment() {
// Required empty public constructor
}
public static RemittanceFragment newInstance() {
RemittanceFragment fragment = new RemittanceFragment();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_remit_menu, container, false);
ButterKnife.bind(this, view);
remitCancelView.setVisibility(View.GONE);
remitCheckPaidView.setVisibility(View.GONE);
remitCreateView.setVisibility(View.GONE);
btnCancel.setOnClickListener(this);
btnCreate.setOnClickListener(this);
btnCheckPaid.setOnClickListener(this);
btnGoBack.setOnClickListener(this);
btnGoBack2.setOnClickListener(this);
return view;
}
#Override
public void onClick(View v) {
remitMainMenuView.setVisibility(View.GONE);
switch (v.getId()) {
case R.id.btn_cancel:
remitCancelView.setVisibility(View.VISIBLE);
tvRemitHeaderTitle.setText("CANCEL\nREMITTANCE");
populateData();
break;
case R.id.btn_checkpaid:
remitCheckPaidView.setVisibility(View.VISIBLE);
tvRemitHeaderTitle.setText("CHECK / PAID\nREMITTANCE");
break;
case R.id.btn_create:
remitCreateView.setVisibility(View.VISIBLE);
tvRemitHeaderTitle.setText("CREATE\nREMITTANCE");
break;
case R.id.btn_back:
case R.id.btn_back2:
remitMainMenuView.setVisibility(View.VISIBLE);
remitCancelView.setVisibility(View.GONE);
remitCheckPaidView.setVisibility(View.GONE);
remitCreateView.setVisibility(View.GONE);
tvRemitHeaderTitle.setText("REMITTANCE");
break;
default:
break;
}
}
public void populateData() {
List<RemitTransaction> transactions = new ArrayList<>();
transactions = RemitTransaction.createRemitTransactionList();
RemitTransactionListAdapter adapter = new RemitTransactionListAdapter
(transactions, getActivity());
cancelRecyclerView.setAdapter(adapter);
cancelRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
}
public static class RemitTransaction {
private String mRefno;
private String mDate;
private String mMsisdn;
private String mAmount;
public RemitTransaction(String refno, String date, String msisdn, String amount) {
mRefno = refno;
mDate = date;
mMsisdn = msisdn;
mAmount = amount;
}
public String getmRefno() {
return mRefno;
}
public String getmDate() {
return mDate;
}
public String getmMsisdn() {
return mMsisdn;
}
public String getmAmount() {
return mAmount;
}
public static ArrayList<RemitTransaction> createRemitTransactionList() {
ArrayList<RemitTransaction> transactions = new ArrayList<>();
for (int n = 0; n < 4; n++) {
transactions.add(n, new RemitTransaction(
"REF01253123" + n,
"July " + n + ", 2016",
"0920987654" + n,
"100" + n));
}
return transactions;
}
}
public class RemitTransactionListAdapter
extends RecyclerView.Adapter<RemitTransactionListAdapter.CancelVH>{
private List<RemitTransaction> mList;
private Context mContext;
public RemitTransactionListAdapter(List<RemitTransaction> list, Context context) {
mList = list;
mContext = context;
}
private Context getContext() {
return mContext;
}
#Override
public CancelVH onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = getContext();
View v = LayoutInflater.from(context).inflate(R.layout.remit_cancel_list_item, parent, false);
return new CancelVH(v);
}
#Override
public void onBindViewHolder(CancelVH holder, int position) {
RemitTransaction transaction = mList.get(position);
holder.cancelRefno.setText(transaction.getmRefno());
holder.cancelAmount.setText(transaction.getmAmount());
holder.cancelDate.setText(transaction.getmDate());
holder.cancelMsisdn.setText(transaction.getmMsisdn());
}
#Override
public int getItemCount() {
return mList.size();
}
public class CancelVH extends RecyclerView.ViewHolder {
#BindView(R.id.remit_item_refno) TextView cancelRefno;
#BindView(R.id.remit_item_amount) TextView cancelAmount;
#BindView(R.id.remit_item_date) TextView cancelDate;
#BindView(R.id.remit_item_msisdn) TextView cancelMsisdn;
public CancelVH(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
}
}
}
And here's the layout file:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/utility_white"
android:paddingTop="#dimen/dimen_margin_vertical_extra_large">
<android.support.v7.widget.RecyclerView
android:id="#+id/remit_cancel_list"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
And here's the list_item layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/remit_item_refno"
style="#style/RemitListItem"
android:text="VW832191"
android:textStyle="bold"
android:layout_alignParentStart="true"/>
<TextView
android:id="#+id/remit_item_amount"
style="#style/RemitListItem"
android:text="100.00"
android:textStyle="bold"
android:layout_alignParentEnd="true"/>
<TextView
android:id="#+id/remit_item_date"
style="#style/RemitListItem"
android:text="2016-07-20"
android:layout_alignParentStart="true"
android:layout_below="#+id/remit_item_refno"/>
<TextView
android:id="#+id/remit_item_msisdn"
style="#style/RemitListItem"
android:text="09273450686"
android:layout_alignParentEnd="true"
android:layout_below="#+id/remit_item_amount"/>
</RelativeLayout>
Hope you can all help me. Thank you!

in previous versions of support library 23.2.0 wrap_content not work for RecyclerView ,and with support library 23.2.0 and above wrap_content work perfectly (now latest version is 24.0.0),
i guess that is your problem.