Develop Reference

How to add a search filter in RecyclerView to filter through parsed JSON data? edited

I am developing an android app which shows a list of countries affected by Coronavirus , the total number of confirmed cases and total Deaths. I am using a JSON API to get the data and displaying it using a RecyclerView . The app works fine , and i get a list of all the countries with their respective case counts. I want to add a search option so that the users can filter the list and find a specific country. How do i do that? I am new to programming , if someone could help with this that would be awesome.
Here is the code snippet
MainActivity.java
private RecyclerView mRecyclerView;
private Corona_Stats_Adapter mCorona_Stats_Adapter;
private TextView mErrorDisplay;
private ProgressBar mProgressBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.corona_stats);
mRecyclerView = (RecyclerView)findViewById(R.id.Corona_stats_recycler);
mErrorDisplay = (TextView) findViewById(R.id.tv_error_message_display);
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setHasFixedSize(true);
mCorona_Stats_Adapter = new Corona_Stats_Adapter();
mRecyclerView.setAdapter(mCorona_Stats_Adapter);
mProgressBar = (ProgressBar)findViewById(R.id.pb_loading_indicator) ;
loadCoronaData();
}
private void loadCoronaData(){
showCoronaDataView();
//String Country = String.valueOf(mSearchQuery.getText());
new Fetch_data().execute();
}
private void showCoronaDataView(){
mErrorDisplay.setVisibility(View.INVISIBLE);
mRecyclerView.setVisibility(View.VISIBLE);
}
private void showErrorMessage(){
mRecyclerView.setVisibility(View.INVISIBLE);
mErrorDisplay.setVisibility(View.VISIBLE);
}
public class Fetch_data extends AsyncTask<Void,Void,String[]> {
#Override
protected void onPreExecute() {
super.onPreExecute();
mProgressBar.setVisibility(View.VISIBLE);
}
#Override
protected String[] doInBackground(Void... voids) {
URL covidRequestURL = NetworkUtils.buildUrl();
try {
String JSONCovidResponse = NetworkUtils.getResponseFromHttpUrl(covidRequestURL);
String[] simpleJsonCovidData = CovidJSON_Utils.getSimpleStringFromJson(MainActivity.this, JSONCovidResponse);
return simpleJsonCovidData;
} catch (IOException | JSONException e) {
e.printStackTrace();
return null;
}
}
#Override
protected void onPostExecute(String[] coronaData) {
mProgressBar.setVisibility(View.INVISIBLE);
if(coronaData !=null){
showCoronaDataView();
mCorona_Stats_Adapter.setCoronaData(coronaData);
} else{
showErrorMessage();
}
}
}
}
RecyclerView Adapter class Corona_stats_Adapter.java
public class Corona_Stats_Adapter extends RecyclerView.Adapter<Corona_Stats_Adapter.Corona_Stats_AdapterViewHolder>
{
private Context context;
// private List<Country> countryList;
// private List<Country> countryListFiltered;
private String[] mCoronaData;
public Corona_Stats_Adapter(){
}
#NonNull
#Override
public Corona_Stats_AdapterViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int viewType) {
Context context = viewGroup.getContext();
int LayoutIdForListItem =R.layout.corona_stats_list_item;
LayoutInflater inflater =LayoutInflater.from(context);
boolean ShouldAttachToParentImmediately = false;
View view = inflater.inflate(LayoutIdForListItem,viewGroup,ShouldAttachToParentImmediately);
return new Corona_Stats_AdapterViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull Corona_Stats_AdapterViewHolder corona_stats_adapterViewHolder, int position) {
String coronaStats = mCoronaData[position];
corona_stats_adapterViewHolder.mCoronaTextView.setText(coronaStats);
}
#Override
public int getItemCount() {
if(null == mCoronaData) return 0;
return mCoronaData.length;
// return countryListFiltered.size();
}
public class Corona_Stats_AdapterViewHolder extends RecyclerView.ViewHolder {
public final TextView mCoronaTextView;
public Corona_Stats_AdapterViewHolder(#NonNull View view) {
super(view);
mCoronaTextView = (TextView) view.findViewById(R.id.tv_corona_data);
}
}
public void setCoronaData(String[] coronaData){
mCoronaData = coronaData;
notifyDataSetChanged();
}
}
Parsing the JSON data in CovidJSON_Utils.java
public final class CovidJSON_Utils {
public static String[] getSimpleStringFromJson(Context context, String codivJsonString)
throws JSONException {
final String COV_COUNTRY = "Countries";
final String COV_CONFIRMED = "confirmed";
final String COV_DEATHS = "deaths";
final String COV_MESSAGE_CODE = "code";
String[] parsedCovidData = null;
JSONObject covidJsonObject = new JSONObject(codivJsonString);
if (covidJsonObject.has(COV_MESSAGE_CODE)) {
int errorCode = covidJsonObject.getInt(COV_MESSAGE_CODE);
switch (errorCode) {
case HttpURLConnection.HTTP_OK:
break;
case HttpURLConnection.HTTP_NOT_FOUND:
return null;
default:
return null;
}
}
JSONArray countryCovidArray = covidJsonObject.getJSONArray(COV_COUNTRY);
parsedCovidData = new String[countryCovidArray.length()];
for (int i = 0; i < countryCovidArray.length(); i++) {
JSONObject countryJSONObject = countryCovidArray.getJSONObject(i);
String Country = countryJSONObject.getString("Country");
String Confirmed = String.valueOf(countryJSONObject.getInt("TotalConfirmed"));
String Deaths = String.valueOf(countryJSONObject.getInt("TotalDeaths"));
parsedCovidData[i] = Country + "- Cases " + Confirmed + "- Deaths " + Deaths;
}
return parsedCovidData;
}
}

The problem is with below initialization in the MainActivity.Oncreate method
mCorona_Stats_Adapter = new Corona_Stats_Adapter(this,countries);
Initialize the adapter in onPostExecute method with updated countries data.
Hope this will help you.

You have to set arraylist to update country data in adapter after getting data from the server.
Public void setCoronaData (Arraylist coronaData) {
countryList = coronaData;
notifyDataSetChanged ();
}

Cannot display images in Html.fromHtml() in text view for images coming dynamically

I am developing an app in android studio in which contents are coming form an Api in a recyclerview. In the api there is an element "content" that sends all html tags with images like a full page. I have to display that page in textview. I have tried Htm.fromHtml method but it is not displaying the images. I have searched all answers and got the solution of ImageGetter method, but I am not able to display dynamic content in the recycleradapter from ImageGetter. I have to keep the images in the drawable of my app and match the source URL that is being parsed. Please help. Below is my code.
PageActivity.java
public class PageActivity extends AppCompatActivity {
RequestQueue queue;
String menuidpage;
RecyclerView recyclerView;
List<MenuFeeds> feedsList = new ArrayList<MenuFeeds>();
String newimage = "http://www.groveus.com/micro/assets/uploads/page/";
PageRecyclerAdapter adapter;
private ProgressDialog pDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_page);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
Bundle bundle=getIntent().getExtras();
menuidpage=bundle.getString("page_id");
recyclerView = (RecyclerView) findViewById(R.id.recyclerviewpage);
pDialog = new ProgressDialog(this);
adapter = new PageRecyclerAdapter(this, feedsList);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
//Getting Instance of Volley Request Queue
queue = NetworkController.getInstance(this).getRequestQueue();
//Volley's inbuilt class to make Json array request
pDialog.setMessage("Loding...");
pDialog.show();
String url = "http://www.groveus.com/micro/api/index.php/pages/view?
id="+menuidpage;
JsonArrayRequest menuReq = new JsonArrayRequest(url, new
Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
pDialog.dismiss();
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
MenuFeeds feeds = new MenuFeeds(obj.getInt("page_id"),
obj.getString("status"), obj.getString("title"),
newimage+obj.getString("image"),obj.getString("content"));
// adding movie to movies array
feedsList.add(feeds);
} catch (Exception e) {
System.out.println(e.getMessage());
} finally {
//Notify adapter about data changes
adapter.notifyItemChanged(i);
}
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println(error.getMessage());
pDialog.dismiss();
}
});
//Adding JsonArrayRequest to Request Queue
queue.add(menuReq);
}
#Override
public boolean onSupportNavigateUp() {
onBackPressed();
return true;
}
}
PageRecyclerAdapter.java
public class PageRecyclerAdapter extends
RecyclerView.Adapter<PageRecyclerAdapter.MyViewHolder> implements
View.OnTouchListener
{
private List<MenuFeeds> feedsList;
private Context context;
private LayoutInflater inflater;
public PageRecyclerAdapter(Context context, List<MenuFeeds> feedsList) {
this.context = context;
this.feedsList = feedsList;
inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View rootView = inflater.inflate(R.layout.list_layout5, parent, false);
return new MyViewHolder(rootView);
}
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
final MenuFeeds feeds = feedsList.get(position);
//Pass the values of feeds object to Views
//holder.idmenu.setText(feeds.getMenuId());
//holder.title.setText(feeds.getFeedName());
/* holder.description.setText(Html.fromHtml(feeds.getDescription(), 0,
new Html.ImageGetter() {
#Override
public Drawable getDrawable(String s) {
int id;
if
(s.equals("http://www.groveus.com/micro/assets/images/URINARY TRACT
INFECTION 1.png")) {
id = R.drawable.urin1;
}
else if
(s.equals("http://www.groveus.com/micro/assets/images/URINARY TRACT
INFECTION 2.png")) {
id = R.drawable.urin2;
}
else if
(s.equals("http://www.groveus.com/micro/assets/images/SKIN AND SOFT TISSUE
INFECTION 1.png")) {
id = R.drawable.skinsoft1;
}
else if
(s.equals("http://www.groveus.com/micro/assets/images/SKIN AND SOFT TISSUE
INFECTION 2.png")) {
id = R.drawable.skinsoft2;
}
else if
(s.equals("http://groveus.com/micro/assets/images/RESPIRATORY TRACT
INFECTION.png")) {
id = R.drawable.respo;
}
else if (s.equals("http://groveus.com/micro/assets/images/LOCAL
BACTERIAL INFECTIONS.png")) {
id = R.drawable.local;
}
else if
(s.equals("http://groveus.com/micro/assets/images/URINARY TRACT INFECTION
2nd 1.png")) {
id = R.drawable.urine2nd1;
}
else if
(s.equals("http://groveus.com/micro/assets/images/URINARY TRACT INFECTION
2nd 2.png")) {
id = R.drawable.urine2nd2;
}
else if
(s.equals("http://groveus.com/micro/assets/images/table.png")) {
id = R.drawable.table;
}
else if
(s.equals("http://www.groveus.com/micro/assets/images/table 2.png")) {
id = R.drawable.table2;
}
else {
return null;
}
Drawable d = context.getResources().getDrawable(id);
d.setBounds(0,0,1020,600);
return d;
}
}, null));*/
holder.description.setText(Html.fromHtml(feeds.getDescription()));
holder.description.setOnTouchListener(this);
holder.description.setMovementMethod(new ScrollingMovementMethod());
holder.imageview.setImageUrl(feeds.getImgURL(),
NetworkController.getInstance(context).getImageLoader());
// holder.ratingbar.setProgress(feeds.getRating());
}
#Override
public int getItemCount() {
return feedsList.size();
}
#Override
public boolean onTouch(View view, MotionEvent motionEvent) {
view.getParent().requestDisallowInterceptTouchEvent(true);
return false;
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private TextView title,description;
private NetworkImageView imageview;
//private ProgressBar ratingbar;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.ImageNameTextView);
description = (TextView) itemView.findViewById(R.id.desc);
//idmenu = (TextView) itemView.findViewById(R.id.ImageNameTextView2);
UrlImageParser p=new UrlImageParser(description,context);
// Volley's NetworkImageView which will load Image from URL
imageview = (NetworkImageView) itemView.findViewById(R.id.thumbnail);
}
}
}
MenuFeeds.java
public class MenuFeeds
{
private String imgURL, feedName, description,page;
//private String id;
private int id;
public MenuFeeds(int menuid, String page, String name, String imgurl,String
desc) {
this.id=menuid;
this.page=page;
this.feedName = name;
this.imgURL = imgurl;
this.description = desc;
//this.rating = rating;
}
public int getMenuId() {
return id;
}
public String getPageID()
{
return page;
}
public String getDescription() {
return description;
}
public String getImgURL() {
return imgURL;
}
public String getFeedName() {
return feedName;
}
}

I also faced a similar problem month ago and used this and it works fine :
String htmlData = listData.get(position).getValue();
String showData = htmlData.replace("\n", "");
URLImageParser p = new URLImageParser(holder.textt, context);
Spanned htmlAsSpanned = Html.fromHtml(showData,p,null);
holder.yourTextView.setText(htmlAsSpanned);
Now copy and paste these 2 methods :
First method :
public class URLDrawable extends BitmapDrawable {
protected Drawable drawable;
#Override
public void draw(Canvas canvas) {
if(drawable != null) {
drawable.draw(canvas);
}
}
}
///Second Method :
public class URLImageParser implements Html.ImageGetter {
Context c;
TextView container;
/***
* Construct the URLImageParser which will execute AsyncTask and refresh the container
* #param t
* #param c
*/
public URLImageParser(TextView t, Context c) {
this.c = c;
this.container = t;
}
public Drawable getDrawable(String source) {
URLDrawable urlDrawable = new URLDrawable();
// get the actual source
ImageGetterAsyncTask asyncTask =
new ImageGetterAsyncTask( urlDrawable);
asyncTask.execute(source);
// return reference to URLDrawable where I will change with actual image from
// the src tag
return urlDrawable;
}
public class ImageGetterAsyncTask extends AsyncTask<String, Void, Drawable> {
URLDrawable urlDrawable;
public ImageGetterAsyncTask(URLDrawable d) {
this.urlDrawable = d;
}
#Override
protected Drawable doInBackground(String... params) {
String source = params[0];
return fetchDrawable(source);
}
#Override
protected void onPostExecute(Drawable result) {
// set the correct bound according to the result from HTTP call
urlDrawable.setBounds(0, 0, 0 + result.getIntrinsicWidth(), 0
+ result.getIntrinsicHeight());
// change the reference of the current drawable to the result
// from the HTTP call
urlDrawable.drawable = result;
// redraw the image by invalidating the container
URLImageParser.this.container.invalidate();
URLImageParser.this.container.setHeight((URLImageParser.this.container.getHeight()
+ result.getIntrinsicHeight()));
}
/***
* Get the Drawable from URL
* #param urlString
* #return
*/
public Drawable fetchDrawable(String urlString) {
try {
InputStream is = fetch(urlString);
Drawable drawable = Drawable.createFromStream(is, "src");
drawable.setBounds(0, 0, 0 + drawable.getIntrinsicWidth(), 0
+ drawable.getIntrinsicHeight());
return drawable;
} `enter code here`catch (Exception e) {
return null;
}
}
private InputStream fetch(String urlString) throws MalformedURLException, IOException {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(urlString);
HttpResponse response = httpClient.execute(request);
return response.getEntity().getContent();
}
}
}

try this
load your image using piccaso
add below library in your build.gradle
implementation 'com.squareup.picasso:picasso:2.71828'
when you need to set image use piccaso this way
Picasso.get()
.load(your_image)
.placeholder(R.drawable.user_placeholder)
.error(R.drawable.your_error_image_or_blank)
.into(your_imageView);

How to Populate 2 strings in Listview from webservice?

Am an newbie to android ...kindly help me guys...I have 2 strings in my sample webservice(Not in an array) and I want to populate it in the listview .I wrote code to populate with a single string.But I don't know how to populate with 2nd strings below to 1st string in listview.Any suggestion will be appreciated.
Here is my complete code
HTTPURLCONNECT
class HttpULRConnect {
public static String getData(String uri){
BufferedReader reader = null;
try {
URL url = new URL(uri);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
StringBuilder sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
Log.d("testhtt2","test");
String line;
while ((line= reader.readLine())!=null) {
sb.append(line+"\n");
}
Log.d("test44", sb.toString());
return sb.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
finally{
if (reader!=null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}}}
Here is my FETCH.java
public class Fetch extends Activity {
ArrayList<Flowers> flowersList = new ArrayList<Flowers>();
String url ="http://113.193.30.155/MobileService/MobileService.asmx/GetSampleData";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fetch);
new BackTask().execute(url);
}
public class BackTask extends AsyncTask<String,String,String>{
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(String... strings) {
String content =HttpULRConnect.getData(url);
return content;
}
#Override
protected void onPostExecute(String s) {
try {
JSONArray ar = new JSONArray(s);
for (int i = 0; i < ar.length(); i++) {
JSONObject jsonobject = ar.getJSONObject(i);
Flowers flowers = new Flowers();
flowers.setName(jsonobject.getString("NAME"));
flowersList.add(flowers);
}
}
catch (JSONException e){
e.printStackTrace();
}
FlowerAdapter adapter = new FlowerAdapter(Fetch.this, R.layout.flower_lis_item, flowersList);
ListView lv = (ListView) findViewById(R.id.listView);
lv.setAdapter(adapter);
}
}
static class Flowers {
public String getName() {
return NAME;
}
public void setName(String name) {
this.NAME = name;
}
private String NAME;
}
public static class FlowerAdapter extends ArrayAdapter<Flowers> {
private ArrayList<Flowers> items;
private Context mContext;
public FlowerAdapter(Context context, int textViewResourceID, ArrayList<Flowers> items){
super(context,textViewResourceID,items);
mContext = context;
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
Flowers flowers = items.get(position);
if(v==null){
LayoutInflater inflater =(LayoutInflater) getContext().getSystemService(LAYOUT_INFLATER_SERVICE);
v=inflater.inflate(R.layout.flower_lis_item,null);
}
TextView title = (TextView)v.findViewById(R.id.textView3);
TextView text =(TextView)v.findViewById(R.id.textView2);
if (title != null) {
title.setText(flowers.getName());
text.setText(flowers.getName());
}
return v;
}
}
}

RecyclerView not displaying item views when I use an actual phone but on emulator it works fine

My recyclerView is not displaying the item views and dont no why, and I am able to get the data from the server but the recyclerView is just not populating my data with the ui.
Here is my Adapter class that binds the itemviews with the data :
public class AdapterBooking extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private LayoutInflater inflater;
List<Booking> data= Collections.emptyList();
Booking current ;
public AdapterBooking(Context context,List<Booking> data) {
this.context = context;
this.inflater= LayoutInflater.from(context);
this.data = data;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view=inflater.inflate(R.layout.containerbookings, parent,false);
MyHolder holder=new MyHolder(view);
return holder;
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
MyHolder myHolder = (MyHolder) holder;
current = data.get(position);
myHolder.txtAccommoName.setText(current.AccommoName);
myHolder.txtBookingDate.setText("Booking Date: " + current.BookingDate);
myHolder.txtBookingExpiry.setText("Booking Expiry: " + current.BookingDuration);
myHolder.txtBookngStatus.setText("Status " + current.AccredStatus);
myHolder.txtBookngStatus.setTextColor( ContextCompat.getColor(context, R.color.colorAccent));
Glide.with(context).load(R.drawable.the_yard_room)
.placeholder(R.drawable.ic_img_error)
.error(R.drawable.ic_img_error)
.into(myHolder.img);
}
#Override
public int getItemCount() {
return data.size();
}
class MyHolder extends RecyclerView.ViewHolder {
TextView txtAccommoName;
ImageView img;
TextView txtBookingDate;
TextView txtBookingExpiry;
TextView txtBookngStatus;
BootstrapButton btnCancel;
public MyHolder(View itemView) {
super( itemView );
txtAccommoName = (TextView)itemView.findViewById(R.id.textBookedAccommoName);
img= (ImageView) itemView.findViewById(R.id.imageBookedAccomo);
txtBookingDate = (TextView)itemView.findViewById(R.id.txtBookingDate);
txtBookingExpiry = (TextView)itemView.findViewById( R.id. txtBookingExpiry);
txtBookngStatus = (TextView)itemView.findViewById( R.id.txtBookingStatus );
btnCancel = (BootstrapButton)itemView.findViewById( R.id. btnCancelBookings);
}
Here is my Activity class that gets the data from the server:
public class BookingList extends AppCompatActivity {
List<Booking> data;
Booking booking;
RecyclerView recyclerViewBooking;
AdapterBooking mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_booking_list );
new Connect().execute();
}
private class Connect extends AsyncTask<String,String,String>
{
ProgressDialog load;
HttpURLConnection connection = null;
URL url = null;
String http = null;
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(BookingList.this);
int studID = settings.getInt("STUDENT_ID_BOOKING",0 );
public Connect() {
load = new ProgressDialog(BookingList.this);
}
#Override
protected void onPreExecute() {
super.onPreExecute();
load.setMessage("Loading...");
load.setCancelable(false);
load.show();
}
#Override
protected String doInBackground(String... params) {
http = "http://192.168.42.197:5432/WCF/BookingServices.svc/getAllBookingsByStud/"+studID;
try {
url = new URL(http);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
connection = (HttpURLConnection) url.openConnection();
connection.setReadTimeout(15000);
connection.setConnectTimeout(10000);
connection.setRequestMethod("GET");
connection.setRequestProperty("Accept", "Application/json");
connection.setDoInput(true);
} catch (IOException e) {
e.printStackTrace();
}
try {
int code = connection.getResponseCode();
System.out.println("Response: " + code);
if(code ==HttpURLConnection.HTTP_OK)
{
InputStream input = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line = null;
while((line=reader.readLine()) != null)
{
result.append(line);
}
System.out.println(result.toString());
return (result.toString());
}else {
return("Unsuccessful");
}
} catch (IOException e) {
e.printStackTrace();
return e.toString();
}finally {
connection.disconnect();
}
}
#Override
protected void onPostExecute(String result) {
load.dismiss();
load.dismiss();
data= new ArrayList<>();
try {
JSONArray jsonArray = new JSONArray(result);
for (int i = 0; i < jsonArray.length();i++)
{
JSONObject jsonObject = jsonArray.getJSONObject(i);
JSONObject object = jsonObject.getJSONObject("Accommodation");
JSONObject objectStudent = jsonObject.getJSONObject("Student");
booking = new Booking();
booking.Name = objectStudent.getString("Name");
booking.Surname = objectStudent.getString("Surname");
booking.StudentNumber = objectStudent.getInt("StudentNumber");
booking.AccommoName = object.getString("AccommoName");
booking.AccredStatus = object.getString("AccredStatus");
booking.BookingDate = jsonObject.getString("BookingDate");
booking.BookingDuration = jsonObject.getString("BookingDuration");
booking.BookingStatus = jsonObject.getString( "BookingStatus" );
data.add(booking);
}
recyclerViewBooking = (RecyclerView)findViewById(R.id.listOfbooks);
mAdapter = new AdapterBooking(BookingList.this,data);
recyclerViewBooking.setAdapter(mAdapter);
recyclerViewBooking.setLayoutManager(new LinearLayoutManager(BookingList.this));
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(BookingList.this, e.toString(), Toast.LENGTH_LONG).show();
}
}
}
}

Check your Layout, make sure your RecyclerView isn't child of ScrollView. If you need that, you can use NestedScrollView.
If you make a breakpoint, your onBindViewHolder works?
Another thing yo can try:
There is a RecyclerView method: setHasStableIds(boolean).
#Override
public void setHasStableIds(boolean hasStableIds) {
return false;
}
Also, I think the context is wrong:
In activity:
private Activity getActivity {
return this;
}
In AsyncTask:
mAdapter = new AdapterBooking(getActivity().getApplicationContext(),data);
I hope this information help you.
Good luck.

Remove this:
MyHolder myHolder = (MyHolder) holder;
Instead do this: because I think there is no need to get another holder reference when you already have it on onBindViewHolder(..) method
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
current = data.get(position);
holder.txtAccommoName.setText(current.AccommoName);
holder.txtBookingDate.setText("Booking Date: " + current.BookingDate);
holder.txtBookingExpiry.setText("Booking Expiry: " + current.BookingDuration);
holder.txtBookngStatus.setText("Status " + current.AccredStatus);
holder.txtBookngStatus.setTextColor( ContextCompat.getColor(context, R.color.colorAccent));
Glide.with(context).load(R.drawable.the_yard_room)
.placeholder(R.drawable.ic_img_error)
.error(R.drawable.ic_img_error)
.into(holder.img);
}
Try this please and do let me know if it changes anything for you.
EDIT: As pointed out by #adnbsr as well in his comments you need to check this as well because it feels wrong instead you should have done this
extends RecyclerView.Adapter<AdapterBooking.MyHolder>

Fixed the problem. Im using shared preference to store data so I used the wrong key to get a value from the shared preference which before was causing the sharedpreference value to be initialized to zero.

Android / Java - ListView Populated with XML Data Using ArrayList: Only Displays First Item

I'm attempting to populate a ListView with XML Data by using an ArrayList - which I've been able to accomplish thus far - the issue is the ArrayList does not seem to populate the ListView with data beyond the first item in the listView and I'm unsure why.
Screenshot
XML Data:
This XML file does not appear to have any style information associated with it. The document tree is shown below.
<response>
<cmd>getVideos</cmd>
<success>1</success>
<NumberOfVideos>4</NumberOfVideos>
<Videos>
<Video>
<VideoName>sample_iPod</VideoName>
<VideoDesc/>
<VideoUrl>
http://mobile.example.com/api/wp-content/uploads/sites/6/2014/01/api/1/06087297988b.m4v
</VideoUrl>
<VideoTags/>
</Video>
<Video>
<VideoName>sample_mpeg4</VideoName>
<VideoDesc/>
<VideoUrl>
http://mobile.example.com/api/wp-content/uploads/sites/6/2014/01/api/1/b5ed9e7100e2.mp4
</VideoUrl>
<VideoTags/>
</Video>
<Video>
<VideoName>sample_sorenson</VideoName>
<VideoDesc/>
<VideoUrl>
http://mobile.example.com/api/wp-content/uploads/sites/6/2014/01/api/1/2a8e64b24997.mov
</VideoUrl>
<VideoTags/>
</Video>
<Video>
<VideoName>sample_iTunes</VideoName>
<VideoDesc/>
<VideoUrl>
http://mobile.example.com/api/wp-content/uploads/sites/6/2014/01/api/1/6c7f65254aad.mov
</VideoUrl>
<VideoTags/>
</Video>
</Videos>
</response>
CustomListViewAdapter.java
public class CustomListViewAdapter extends ArrayAdapter<Cmd> {
Activity context;
List<Cmd> videos;
public CustomListViewAdapter(Activity context, List<Cmd> videos) {
super(context, R.layout.list_item2, videos);
this.context = context;
this.videos = videos;
}
/*private view holder class*/
private class ViewHolder {
ImageView imageView;
TextView txtSuccess;
TextView txtCmd;
TextView txtPrice;
}
public Cmd getItem(int position) {
return videos.get(position);
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item2, null);
holder = new ViewHolder();
holder.txtSuccess = (TextView) convertView.findViewById(R.id.success);
holder.txtCmd = (TextView) convertView.findViewById(R.id.cmd);
holder.txtPrice = (TextView) convertView.findViewById(R.id.price);
holder.imageView = (ImageView) convertView.findViewById(R.id.thumbnail);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Cmd cmd = (Cmd) getItem(position);
holder.txtSuccess.setText(cmd.getSuccess());
holder.txtCmd.setText(cmd.getCmd());
// holder.imageView.setImageBitmap(cmd.getImageBitmap());
holder.txtPrice.setText(cmd.getVideoName() + "");
return convertView;
}
}
SAXParserAsyncTaskActivity.java
public class SAXParserAsyncTaskActivity extends Activity implements
OnClickListener, OnItemClickListener {
Button button;
ListView listView;
List<Cmd> videos = new ArrayList<Cmd>();
CustomListViewAdapter listViewAdapter;
static final String URL = "http://mobile.example.com/api/xml.php?cmd=getVideos&username=fake&password=";
public static final String LIBRARY = "Library";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.parser_main);
findViewsById();
button.setOnClickListener(this);
listView.setOnItemClickListener(this);
GetXMLTask task = new GetXMLTask(this);
task.execute(new String[] { URL });
}
private void findViewsById() {
button = (Button) findViewById(R.id.button);
listView = (ListView) findViewById(R.id.cmdList);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
}
#Override
public void onClick(View view) {
// GetXMLTask task = new GetXMLTask(this);
// task.execute(new String[] { URL });
}
// private inner class extending AsyncTask
private class GetXMLTask extends AsyncTask<String, Void, List<Cmd>> {
private Activity context;
public GetXMLTask(Activity context) {
this.context = context;
}
protected void onPostExecute(List<Cmd> videos) {
listViewAdapter = new CustomListViewAdapter(context, videos);
listView.setAdapter(listViewAdapter);
}
/*
* uses HttpURLConnection to make Http request from Android to download
* the XML file
*/
private String getXmlFromUrl(String urlString) {
StringBuffer output = new StringBuffer("");
try {
InputStream stream = null;
URL url = new URL(urlString);
URLConnection connection = url.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection) connection;
httpConnection.setRequestMethod("GET");
httpConnection.connect();
if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
stream = httpConnection.getInputStream();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(stream));
String s = "";
while ((s = buffer.readLine()) != null)
output.append(s);
}
} catch (Exception ex) {
ex.printStackTrace();
}
return output.toString();
}
#Override
protected List<Cmd> doInBackground(String... urls) {
List<Cmd> videos = null;
String xml = null;
for (String url : urls) {
xml = getXmlFromUrl(url);
InputStream stream = new ByteArrayInputStream(xml.getBytes());
videos = SAXXMLParser.parse(stream);
for (Cmd cmd : videos) {
String videoName = cmd.getVideoName();
// String getVideos = cmd.getVideos();
String getVideo = cmd.getVideo();
String getVideoURL = cmd.getVideoURL();
String getNumberOfVideos = cmd.getNumberOfVideos();
Bitmap bitmap = null;
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inSampleSize = 1;
try {
bitmap = BitmapFactory.decodeStream(
new URL(videoName).openStream(), null,
bmOptions);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
// stream.close();
return videos;
}
}
}
Cmd.java
public class Cmd implements ListAdapter {
private String success;
private String cmd;
List<Cmd> videos;
private String video;
private String numberofvideos;
private String videoname;
private String videourl;
private LayoutInflater mInflater;
Button fav_up_btn1;
Button fav_dwn_btn1;
Context my_context;
// private Bitmap imageBitmap;
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// If convertView wasn't null it means we have already set it to our
// list_item_user_video so no need to do it again
if (convertView == null) {
// This is the layout we are using for each row in our list
// anything you declare in this layout can then be referenced below
convertView = mInflater.inflate(R.layout.list_item_user_video,
parent, false);
}
// We are using a custom imageview so that we can load images using urls
ImageView thumb = (ImageView) convertView
.findViewById(R.id.userVideoThumbImageView);
//thumb.setScaleType(ScaleType.FIT_XY);
TextView title = (TextView) convertView
.findViewById(R.id.userVideoTitleTextView);
TextView uploader = (TextView) convertView
.findViewById(R.id.userVideouploaderTextView);
TextView viewCount = (TextView) convertView
.findViewById(R.id.userVideoviewsTextView);
uploader.setText(videos.get(position).getTitle());
viewCount.setText(videos.get(position).getviewCount() + " views");
fav_up_btn1 = (Button) convertView.findViewById(R.id.fav_up_btn1);
fav_up_btn1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
boolean favIsUp = fav_up_btn1
.getBackground()
.getConstantState()
.equals(my_context.getResources()
.getDrawable(R.drawable.fav_up_btn1)
.getConstantState());
// set the background
fav_up_btn1
.setBackgroundResource(favIsUp ? R.drawable.fav_dwn_btn1
: R.drawable.fav_up_btn1);
}
});
// Get a single video from our list
final Cmd video = videos.get(position);
// Set the image for the list item
// / thumb.setImageDrawable(video.getThumbUrl());
//thumb.setScaleType(ScaleType.FIT_XY);
// Set the title for the list item
title.setText(video.getTitle());
uploader.setText("by " + video.getUploader() + " | ");
return convertView;
}
public String getUploader() {
// TODO Auto-generated method stub
return null;
}
public String getviewCount() {
// TODO Auto-generated method stub
return null;
}
public CharSequence getTitle() {
// TODO Auto-generated method stub
return null;
}
public String getCmd() {
return cmd;
}
public void setCmd(String cmd) {
this.cmd = cmd;
}
public String getSuccess() {
return success;
}
public void setSuccess(String success) {
this.success = success;
}
public String getNumberOfVideos() {
return numberofvideos;
}
public void setNumberOfVideos(String numberofvideos) {
this.numberofvideos = numberofvideos;
}
public List<Cmd> getVideos() {
return videos;
}
public void setVideos(List<Cmd> videos) {
this.videos = videos;
}
public String getVideo() {
return video;
}
public void setVideo(String video) {
this.video = video;
}
public String getVideoName() {
return videoname;
}
public void setVideoName(String videoname) {
this.videoname = videoname;
}
public String getVideoURL() {
return videourl;
}
public void setVideoURL(String videourl) {
this.videourl = videourl;
}
#Override
public int getCount() {
return videos.size();
}
#Override
public Object getItem(int position) {
return videos.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public int getItemViewType(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public int getViewTypeCount() {
// TODO Auto-generated method stub
return 0;
}
#Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
#Override
public void registerDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
#Override
public void unregisterDataSetObserver(DataSetObserver observer) {
// TODO Auto-generated method stub
}
#Override
public boolean areAllItemsEnabled() {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isEnabled(int position) {
// TODO Auto-generated method stub
return false;
}
public String getId() {
// TODO Auto-generated method stub
return null;
}
}
SAXXMLParser.java
public class SAXXMLParser {
public static List<Cmd> parse(InputStream is) {
List<Cmd> response = null;
try {
// create a XMLReader from SAXParser
XMLReader xmlReader = SAXParserFactory.newInstance().newSAXParser()
.getXMLReader();
// create a SAXXMLHandler
SAXXMLHandler saxHandler = new SAXXMLHandler();
// store handler in XMLReader
xmlReader.setContentHandler(saxHandler);
// the process starts
xmlReader.parse(new InputSource(is));
// get the `Video list`
response = saxHandler.getResponse();
} catch (Exception ex) {
Log.d("XML", "SAXXMLParser: parse() failed");
ex.printStackTrace();
}
// return video list
return response;
}
}
SAXXMLHandler.java
public class SAXXMLHandler extends DefaultHandler {
private List<Cmd> videos;
private String tempVal;
// to maintain context
private Cmd cmd;
public SAXXMLHandler() {
videos = new ArrayList<Cmd>();
}
public List<Cmd> getResponse() {
return videos;
}
// Event Handlers
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
// reset
tempVal = "";
if (qName.equalsIgnoreCase("cmd")) {
// create a new instance of cmd
cmd = new Cmd();
}
}
public void characters(char[] ch, int start, int length)
throws SAXException {
tempVal = new String(ch, start, length);
}
public void endElement(String uri, String localName, String qName)
throws SAXException {
if (qName.equalsIgnoreCase("videos")) {
// add it to the list
videos.add(cmd);
} else if (qName.equalsIgnoreCase("success")) {
cmd.setSuccess(tempVal);
} else if (qName.equalsIgnoreCase("numberofvideos")) {
cmd.setNumberOfVideos(tempVal);
} else if (qName.equalsIgnoreCase("videos")) {
cmd.setVideos(videos);
} else if (qName.equalsIgnoreCase("video")) {
cmd.setVideo(tempVal);
} else if (qName.equalsIgnoreCase("videoname")) {
cmd.setVideoName(tempVal);
} else if (qName.equalsIgnoreCase("videourl")) {
cmd.setVideoURL(tempVal);
}
}
}
parser_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/button" />
<ListView
android:id="#+id/cmdList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
XML Screenshot
P.S.
If any additional information is required - please let me know (I will be at my desk working on this for the next few hours and will gladly answer any questions and accept any answers promptly)

In SAXXMLHandler.java's endElement() method you only add the cmd to the videos list if qName.equalsIgnoreCase("videos").
In all other cases you modify the cmd but you dont actually add it to the list. You want to add a videos.add(cmd) statement in the else if blocks as well so all the cmd's get added to the list.
This mistake right here is the cause of your List<Cmd> videos only having one item and thus only showing one item in your listview.