Why is my recyclerview only displaying the content of the first item? - android-volley

Question

I am having a problem with my recyclerview, It only displays the content of the first item like this:
I have no idea what caused this, I'm really confused because I have never encountered something like this before. As you can see on the toast, the response return 3 data but I don't understand why the others are not being displayed.
Playlist.java
public class Playlist extends AppCompatActivity {
// inisiasi toolbar
private Toolbar toolbar;
// navigation drawer
public DrawerLayout drawerLayout;
private ActionBarDrawerToggle drawerToggle;
RecyclerView recyclerView;
String[] id,title,dir, artists;
ArrayList<String> artist;
String navTitles[];
TypedArray navIcons;
RecyclerView.Adapter recyclerViewAdapter;
TextView textView;
String video;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_playlist);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
final Drawable upArrow = getResources().getDrawable(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
upArrow.setColorFilter(getResources().getColor(R.color.colorIcons), PorterDuff.Mode.SRC_ATOP);
getSupportActionBar().setHomeAsUpIndicator(upArrow);
Intent intent = getIntent();
video = intent.getStringExtra("songs");
//textView = (TextView) findViewById(R.id.text);
//textView.setText(video);
getPlaylist();
// dir = PlaylistJson.dirs;
//artist = new ArrayList<String>(Arrays.asList(title));
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case android.R.id.home:
finish();
break;
}
return super.onOptionsItemSelected(item);
}
private void getPlaylist(){
final ProgressDialog loading = ProgressDialog.show(this,"Fetching Data","Please wait...",false,false);
//Creating a string request
StringRequest stringRequest = new StringRequest(Request.Method.POST, "http://musicmania.hol.es/playlist/getSongsFromPlaylist",
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//If we are getting success from server
Toast.makeText(Playlist.this, response, Toast.LENGTH_LONG).show();
loading.dismiss();
showPlaylistJSON(response);
id = PlaylistJson.ids;
title = PlaylistJson.titles;
artists = PlaylistJson.artists;
recyclerView= (RecyclerView) findViewById(R.id.my_recycler_view);
RecyclerViewAdapter adapter=new RecyclerViewAdapter(id, title,artists, Playlist.this);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(Playlist.this));
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
//You can handle error here if you want
}
}){
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<>();
//Adding parameters to request
params.put("playlist", video);
//returning parameter
return params;
}
};
//Adding the string request to the queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void showPlaylistJSON(String json){
PlaylistJson pj = new PlaylistJson(json);
pj.parseJSON();
}
}
RecyclerViewAdapter.java
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.RecyclerViewHolder> {
LayoutInflater inflater;
Context context;
String[] id,title, artists;
public RecyclerViewAdapter(String[] id, String[] titles, String[] artists, Context context){
this.id = id;
this.title = titles;
this.artists = artists;
this.context = context;
}
#Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = null;
RecyclerViewHolder viewHolder = null;
if(Integer.parseInt(id[0]) != 0){
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list, parent, false);
viewHolder = new RecyclerViewHolder(view, context);
}else{
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.empty_list, parent, false);
viewHolder = new RecyclerViewHolder(view, context);
}
return viewHolder;
}
#Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
if(Integer.parseInt(id[0]) != 0) {
holder.item2.setText(title[position]);
holder.imageView2.setTag(holder);
holder.artist.setText(artists[position]);
}else{
holder.item2.setText(title[position]);
}
}
#Override
public int getItemCount() {
return title.length;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder {
TextView item;
ImageView imageView;
TextView item2;
TextView artist;
ImageView imageView2;
ImageButton addtoplaylist;
Context context;
public RecyclerViewHolder(final View itemView, final Context context) {
super(itemView);
this.context = context;
item = (TextView) itemView.findViewById(R.id.tv_NavTitle);
imageView = (ImageView) itemView.findViewById(R.id.iv_NavIcon);
item2 = (TextView) itemView.findViewById(R.id.list_title);
imageView2 = (ImageView) itemView.findViewById(R.id.list_avatar);
artist = (TextView) itemView.findViewById(R.id.list_artist);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(v.getContext(), Video.class);
intent.putExtra("video", ParseJson.dirs[getAdapterPosition()]);
v.getContext().startActivity(intent);
}
});
}
}
}
PlaylistJson.java
package com.example.rendell.musicmaniajukebox.json_model;
import android.widget.Toast;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class PlaylistJson {
public static String[] ids;
public static String[] titles;
public static String[] artists;
public static String[] dirs;
public static final String JSON_ARRAY = "result";
public static final String KEY_ID = "id";
public static final String KEY_TITLE = "title";
public static final String KEY_ARTIST = "artist";
public static final String KEY_DIR = "dir";
private JSONArray users = null;
private String json;
public PlaylistJson(String json){
this.json = json;
}
public void parseJSON(){
JSONObject jsonObject=null;
try {
jsonObject = new JSONObject(json);
users = jsonObject.getJSONArray(JSON_ARRAY);
ids = new String[users.length()];
titles = new String[users.length()];
artists = new String[users.length()];
dirs = new String[users.length()];
for(int i=0;i<users.length();i++){
JSONObject jo = users.getJSONObject(i);
ids[i] = jo.getString(KEY_ID);
titles[i] = jo.getString(KEY_TITLE);
artists[i] = jo.getString(KEY_ARTIST);
dirs[i] = jo.getString(KEY_DIR);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}

Answer 1

So the problem was in my PlaylistJson.java file. My volley response only returns 3 items per set e.g. {"id":1, "title": "song", "artist":"artist"} but I am also initialing for the dir which doesn't receive any json so maybe the bug came from that. Anyway, removed that and it worked.