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Android Java - Parse Array Entry of JSON into Recycler View

I am trying to parse a Block of JSON into a RecyclerView. So far I was able to achieve this with a quite flat JSON Structure. But now I have an Array-Entry in my JSON File where I always want to get the first Entry.
The JSON looks like this:
[
{
"MatchID": 60989,
"Team1": {
"TeamName": "FC Bayern München",
"TeamIconUrl": "https://i.imgur.com/jJEsJrj.png"
},
"Team2": {
"TeamName": "VfL Wolfsburg",
"TeamIconUrl": "https://i.imgur.com/ucqKV4B.png"
},
"MatchResults": [
{
"PointsTeam1": 4,
"PointsTeam2": 0,
"ResultOrderID": 1
},
{
"PointsTeam1": 1,
"PointsTeam2": 0,
"ResultOrderID": 2
}
]
},
{
"MatchID": 60990,
"Team1": {
"TeamName": "VfL Bochum",
"TeamIconUrl": "https://i.imgur.com/5jy3Gfr.png"
},
"Team2": {
"TeamName": "1. FC Union Berlin",
"TeamIconUrl": "https://upload.wikimedia.org/wikipedia/commons/4/44/1._FC_Union_Berlin_Logo.svg"
},
"MatchResults": [
{
"PointsTeam1": 0,
"PointsTeam2": 1,
"ResultOrderID": 1
},
{
"PointsTeam1": 0,
"PointsTeam2": 1,
"ResultOrderID": 2
}
]
}
]
My Activity fetches this JSON from an API using Retrofit2
private void parseJson() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://www.openligadb.de/api/")
.addConverterFactory(GsonConverterFactory.create())
.build();
RequestInterface request = retrofit.create(RequestInterface.class);
Call<List<Match>> call=request.getMatchJson();
call.enqueue(new Callback<List<Match>>() {
#Override
public void onResponse(Call<List<Match>> call, Response<List<Match>> response) {
if (response.isSuccessful() && response.body() != null) {
matchList = new ArrayList<>(response.body());
matchAdapter = new MatchAdapter(matchList, ActivityMatch.this);
mRecyclerView.setAdapter(matchAdapter);
}
}
#Override
public void onFailure(Call<List<Match>> call, Throwable t) {
Log.println(Log.ERROR, "FAILED", String.valueOf(t));
Toast.makeText(ActivityMatch.this, "Oops! Somehting went wrong!", Toast.LENGTH_SHORT).show();
}
});
}
My MatchAdapter is then parsing this Data for the View. Here I want to display whatever is the first in MatchResults then using PointsTeam1 and PointsTeam2 to display something like "4 : 0"
Now in my ModelClass accessing direct Values like the TeamName and TeamIconUrl worked but I am struggeling to get to the first entry of the Array and am really stuck on even how to properly approach this issue.
The Adapter Class:
public class MatchAdapter extends RecyclerView.Adapter<MatchAdapter.MatchHolder>{
private ArrayList<Match> matchList;
private Context context;
public MatchAdapter(ArrayList<Match> matchList, Context context) {
this.context = context;
this.matchList = matchList;
}
#NonNull
#Override
public MatchAdapter.MatchHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.match_list_row_layout, viewGroup, false);
return new MatchHolder(view);
}
#Override
public void onBindViewHolder(#NonNull MatchAdapter.MatchHolder holder, int position) {
holder.tvTeam1name.setText(matchList.get(position).Team1.TeamName);
holder.tvTeam2name.setText(matchList.get(position).Team2.TeamName);
Glide.with(context).load(matchList.get(position).Team1.TeamIconUrl).into(holder.ivTeam1Logo);
Glide.with(context).load(matchList.get(position).Team2.TeamIconUrl).into(holder.ivTeam2Logo);
//This is not working
holder.tvResult.setText(matchList.get(position).MatchResults.PointsTeam1 + " : " + matchList.get(position).MatchResults.PointsTeam2);
}
#Override
public int getItemCount() {
return matchList.size();
}
public class MatchHolder extends RecyclerView.ViewHolder {
private TextView tvTeam1name, tvTeam2name, tvResult;
private ImageView ivTeam1Logo, ivTeam2Logo;
public MatchHolder(#NonNull View itemView) {
super(itemView);
tvTeam1name = itemView.findViewById(R.id.tv_team1name);
tvTeam2name = itemView.findViewById(R.id.tv_team2name);
tvResult = itemView.findViewById(R.id.tv_result);
ivTeam1Logo = itemView.findViewById(R.id.iv_team1logo);
ivTeam2Logo = itemView.findViewById(R.id.iv_team2logo);
}
}
}
My ModelClass (Left out Getters/Setters for Readability)
package de.eahjena.app.wi.fussball;
public class Match {
Team Team1;
Team Team2;
MatchResults MatchResults;
public Match(Team Team1, Team Team2, MatchResults MatchResults) {
this.Team1 = Team1;
this.Team2 = Team2;
this.MatchResults = MatchResults;
}
}
class Team {
String TeamName;
String TeamIconUrl;
public Team (String TeamName, String TeamIconUrl) {
this.TeamName = TeamName;
this.TeamIconUrl = TeamIconUrl;
}
}
class MatchResults {
String PointsTeam1;
String PointsTeam2;
public MatchResults(String PointsTeam1, String PointsTeam2) {
this.PointsTeam1 = PointsTeam1;
this.PointsTeam2 = PointsTeam2;
}
}

As per the question you are suppose to use List<MatchResults> MatchResults since the API response contains a list of match results.
Further to use the first position from the matchResults array you cna use it like this in your adapter :
matchList.get(position).MatchResults.get(0).PointsTeam1

How to implement search filter properly on a Recycleview in Android

I have successfully populated my recycleview from mysql database and I want to implement search filter on it. I have seen some examples and tried to implement it. I know i'm close but cant get it properly to work.
My current progress is when I try to search something the whole recycle view goes blank and nothing happens after that.
Here are my java code:
MainActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getHotelDetails();
mylearningAdapters1 = new ArrayList<>();
recyclerView = (RecyclerView) findViewById(R.id.reviews_list);
recyclerView.setHasFixedSize(true);
recyclerViewlayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
recyclerView.setLayoutManager(recyclerViewlayoutManager);
inputSearch = (EditText)findViewById(R.id.searchBar);
inputSearch.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
// filter your list from your input
filter(s.toString());
//you can use runnable postDelayed like 500 ms to delay search text
}
});
}
void filter(String text){
List<MyHotelReviewAdapter> temp = new ArrayList();
for(MyHotelReviewAdapter d: mylearningAdapters){
//or use .equal(text) with you want equal match
//use .toLowerCase() for better matches
if(d.getHotel_user().contains(text)){
temp.add(d);
}
}
//update recyclerview
RecyclerViewMyHotelReviewAdapter rc = new RecyclerViewMyHotelReviewAdapter(mylearningAdapters);
rc.updateList(temp);
}
Here is my Recycleview adapter class code:
RecyclerViewMyHotelReviewAdapter.java
public class RecyclerViewMyHotelReviewAdapter extends RecyclerView.Adapter<RecyclerViewMyHotelReviewAdapter.LearningHolder> {
static Context context;
public static List<MyHotelReviewAdapter> mylearningAdapters;
public RecyclerViewMyHotelReviewAdapter(List<MyHotelReviewAdapter> mylearningAdapters, Context context){
super();
this.mylearningAdapters = mylearningAdapters;
this.context = context;
}
public RecyclerViewMyHotelReviewAdapter(List<MyHotelReviewAdapter> mylearningAdapters) {
}
#Override
public RecyclerViewMyHotelReviewAdapter.LearningHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.show_hotel_details, parent, false);
LearningHolder learningHolder = new LearningHolder(view);
//RecyclerViewModuleAdapter.ModuleHolder moduleHolder = new RecyclerViewModuleAdapter.ModuleHolder(view);
return learningHolder;
}
#SuppressLint("NewApi")
#Override
public void onBindViewHolder(RecyclerViewMyHotelReviewAdapter.LearningHolder holder, int position) {
final MyHotelReviewAdapter mylearningAdapter1 = mylearningAdapters.get(position);
int t = 4;
String a = mylearningAdapter1.getHotel_People();
int c = t + Integer.parseInt(a);
//Toast.makeText(context, ""+c, Toast.LENGTH_SHORT).show();
holder.hotel_user.setText(mylearningAdapter1.getHotel_user());
holder.hotel_dateIn.setText(mylearningAdapter1.getHotel_CheckIn());
holder.hotel_dateOut.setText(mylearningAdapter1.getHotel_CheckOut());
holder.total.setText(String.valueOf("Guests: "+c));
holder.htlName.setText(mylearningAdapter1.getHotel_name());
holder.id.setText(mylearningAdapter1.getHotel_id());
//holder.english_d.setText(mylearningAdapter1.getEnglish());
}
public void updateList(List<MyHotelReviewAdapter> list){
mylearningAdapters = list;
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return mylearningAdapters.size();
}
public class LearningHolder extends RecyclerView.ViewHolder {
String deleteBooking = "http://site2test.in/OxygenClub/mobileapp/delete_booking_careTaker.php";
AppCompatTextView hotel_user, hotel_dateIn, hotel_dateOut, htlName, total, id;
Button checkIn, checkOut;
public LearningHolder(View itemView) {
super(itemView);
hotel_user = (AppCompatTextView)itemView.findViewById(R.id.name);
hotel_dateIn = (AppCompatTextView)itemView.findViewById(R.id.checkin);
hotel_dateOut = (AppCompatTextView)itemView.findViewById(R.id.checkout);
htlName = (AppCompatTextView)itemView.findViewById(R.id.hotelName);
total = (AppCompatTextView)itemView.findViewById(R.id.totalPeople);
id = (AppCompatTextView)itemView.findViewById(R.id.hotelId);
}
}
}...
My DataHolder class.
public class MyHotelReviewAdapter {
public String Hotel_People;
public String Hotel_CheckIn;
public String Hotel_CheckOut;
public String Hotel_User;
public String Hotel_Name;
public String Hotel_Id;
public String getHotel_CheckIn() {
return this.Hotel_CheckIn;
}
public void setHotel_CheckIn(String hotel_checkIn) {
this.Hotel_CheckIn = hotel_checkIn;
}
public String getHotel_CheckOut() {
return this.Hotel_CheckOut;
}
public void setHotel_CheckOut(String hotel_checkOut) {
this.Hotel_CheckOut = hotel_checkOut;
}
public String getHotel_People() {
return this.Hotel_People;
}
public void setHotel_People(String hotel_people) {
this.Hotel_People = hotel_people;
}
public String getHotel_user() {
return this.Hotel_User;
}
public void setHotel_user(String hotel_user) {
this.Hotel_User = hotel_user;
}
public String getHotel_name(){
return this.Hotel_Name;
}
public void setHotel_name(String hotel_name){
this.Hotel_Name = hotel_name;
}
public String getHotel_id(){
return this.Hotel_Id;
}
public void setHotel_id(String hotel_id){
this.Hotel_Id = hotel_id;
}
}
I want to search my data by Hotel_user. I have coded the value of getHotel_user in filter function.

Sort List by Integer

I get the Latitude and Longtitude from my Database and I calculate the distance between two persons in the RecyclerView Adapter.
I want to sort these items by distance, but I have no clue how I can do this.
My Adapter:
public class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.ViewHolder>{
Context context;
List<HomeGetter> homeGetters;
HomeCallback homeCallback;
public HomeAdapter(Context context, List<HomeGetter> homeGetters, HomeCallback homeCallback) {
this.context = context;
this.homeGetters = homeGetters;
this.homeCallback = homeCallback;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_home_profil,parent,false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
calculate_age calculate_age = new calculate_age();
final HomeGetter homeGetter = homeGetters.get(position);
String[] splittedAge = homeGetter.getBirthday().split("\\.");
try {
String age = calculate_age.getAge(context,Integer.valueOf(splittedAge[0]),Integer.valueOf(splittedAge[1]),Integer.valueOf(splittedAge[2]));
String username = homeGetter.getUsername().substring(0,1).toUpperCase() + homeGetter.getUsername().substring(1);
holder.textViewUsername.setText(username + "," + age);
} catch (ParseException e) {
e.printStackTrace();
}
Picasso.with(context).load(homeGetter.getImageURL()).resize(600,700).centerCrop().into(holder.imageView);
holder.cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
homeCallback.getPosition(position);
}
});
holder.textViewLocation.setText(homeGetter.getLocation());
if(homeGetter.getStatus().equals("0")){
holder.status.setImageDrawable(context.getResources().getDrawable(R.drawable.offline));
}else {
holder.status.setImageDrawable(context.getResources().getDrawable(R.drawable.online));
}
}
#Override
public int getItemCount() {
return homeGetters.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView textViewUsername;
CardView cardView;
TextView textViewLocation;
ImageView status;
public ViewHolder(View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.imageViewThumb);
textViewUsername = itemView.findViewById(R.id.textViewProfilUsername);
cardView = itemView.findViewById(R.id.cardViewProfil);
textViewLocation = itemView.findViewById(R.id.textViewLocation);
status = itemView.findViewById(R.id.imageViewOnlinestatus);
}
}
}
On this line I get the distance in km:
holder.textViewLocation.setText(homeGetter.getLocation());
e.g 544
Is it possible to sort the list in the adapter?
Or how can I sort this?
So, how can I achive this?
The Activity
pullData.getData(USERNAME, "1", new Pullcallback() {
#Override
public void getSingleData(String data) {
}
#Override
public void getMultipleData(String[] multipledatas) {
GENDER = multipledatas[5];
GENDERSEARCH = multipledatas[6];
GetStrangers getStrangers = new GetStrangers(Home.this);
Map<String,String> map = new HashMap<>();
map.put("USERNAME",USERNAME);
map.put("GENDER",GENDER);
map.put("SEARCH",GENDERSEARCH);
getStrangers.strangers(map, "7", new Pullcallback() {
#Override
public void getSingleData(String data) {
}
#Override
public void getMultipleData(final String[] multipledatas) {
// username,imagelink,position,birthday
// imageURL,username,birthday,location
pullData.getData(USERNAME, "2", new Pullcallback() {
#Override
public void getSingleData(String data) {
}
#Override
public void getMultipleData(String[] multipledatas2) {
String[] split1 = multipledatas2[1].split(",");
String[] split2 = multipledatas[2].split(",");
float lat1 = Float.valueOf(split1[0]);
float lng1 = Float.valueOf(split1[1]);
float lat2 = Float.valueOf(split2[0]);
float lng2 = Float.valueOf(split2[1]);
Collections.sort(getterList, new Comparator<HomeGetter>() {
public int compare(HomeGetter s1, HomeGetter s2) {
return Integer.compare(Integer.parseInt(s1.getLocation()), Integer.parseInt(s2.getLocation()));
}
});
homeGetter = new HomeGetter(multipledatas[1],multipledatas[0],multipledatas[3],String.valueOf(Math.round(Calculator.calculateDistance(lat1,lng1,lat2,lng2))),multipledatas[4]);
getterList.add(homeGetter);
homeAdapter.notifyDataSetChanged();
loading.setVisibility(View.GONE);
content.setVisibility(View.VISIBLE);
}
#Override
public void onError(String errormessage) {
}
});
}
#Override
public void onError(String errormessage) {
}
});
}
#Override
public void onError(String errormessage) {
}
});
pullData.getData(USERNAME, "2", new Pullcallback() {
#Override
public void getSingleData(String data) {
}
#Override
public void getMultipleData(String[] multipledatas) {
if(multipledatas[7].equals("0")){
Intent intentFirststep = new Intent(Home.this,Firststep.class);
startActivity(intentFirststep);
finish();
}else {
}
}
#Override
public void onError(String errormessage) {
}
});
recyclerViewHome = findViewById(R.id.recyclerViewHome);
homeAdapter = new HomeAdapter(Home.this, getterList, new HomeCallback() {
#Override
public void getPosition(int position) {
Intent stranger = new Intent(Home.this,Stranger.class);
stranger.putExtra("USERNAME",getterList.get(position).getUsername());
startActivity(stranger);
finish();
}
});
recyclerViewHome.setHasFixedSize(true);
recyclerViewHome.setLayoutManager(new GridLayoutManager(Home.this,3));
recyclerViewHome.setItemAnimator(new DefaultItemAnimator());
recyclerViewHome.setAdapter(homeAdapter);
}
But it is not working correctly it shows me 4,14,507 and 12
but it shoild sort 4,12,14,507

In your activity where you are passing your ArrayList just do this before passing it.
Collections.sort(homeGetter, new Comparator<HomeGetter>() {
public int compare(HomeGetter s1, HomeGetter s2) {
return Integer.compare(Integer.parseInt(s1.getLocation()), Integer.parseInt(s2.getLocation()));
}
});
P.S. Don't use parse if you are already storing as integers.
Happy to help.
EDIT:
Put it here-
getterList.add(homeGetter);
Collections.sort(homeGetter, new Comparator<HomeGetter>() {
public int compare(HomeGetter s1, HomeGetter s2) {
return Integer.compare(Integer.parseInt(s1.getLocation()), Integer.parseInt(s2.getLocation()));
}
});
homeAdapter.notifyDataSetChanged();

You can also sort the List<HomeGetter> homegetters using a Comparator & then initialize HomeAdapter with sorted homegetters list.
An Example:
homegetters.sort((hG1, hG2) -> hG1.getLocation().compareTo(hG2.getLocation()));
Above line will sort homegetters list based on getLocation().
Edit:
In your activity, you are sorting the List first and then adding an item into it.
You should instead add all the items first & then sort the List.

I am using a git repo called LikeButton, but the state of my button keeps jumping around in my recyclerview?

I am using a git repo called LikeButton, but the state of my button keeps jumping around in my recyclerview? Here is the repo https://github.com/jd-alexander/LikeButton. Basically when I click on a recyclerview item, it sets a textview to the word true or false based on if the user liked the post or not, and this works. However, the state of my button is doing some weird stuff, it jumps around...
Here is my Adapter, is their anything wrong with it?
public class ViewpagerAdapter extends RecyclerView.Adapter<ViewpagerAdapter.ViewDashboard>{
private LayoutInflater mLayoutInflater;
private ArrayList<QuestionData> data = new ArrayList<>();
public ViewpagerAdapter(Context context) {
mLayoutInflater=LayoutInflater.from(context);
}
public void setBloglist(ArrayList<QuestionData> listBlogs) {
this.data = listBlogs;
notifyItemRangeChanged(0,listBlogs.size());
}
#Override
public ViewDashboard onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mLayoutInflater.inflate(R.layout.customizejson, parent, false);
ViewDashboard viewholder = new ViewDashboard(view);
return viewholder;
}
#Override
public void onBindViewHolder(ViewDashboard holder, int position) {
QuestionData questionHolder = data.get(position);
holder.questionText.setText(questionHolder.getMtext());
//This sets the text, to a true or a false String
holder.mStudentVoted.setText(questionHolder.getVoters());
holder.mLikeButton.setTag(holder);
}
#Override
public int getItemCount() {
return data.size();
}
class ViewDashboard extends RecyclerView.ViewHolder {
private TextView questionText;
private LikeButton mLikeButton;
private TextView mStudentVoted;
public ViewDashboard(View itemView) {
super(itemView);
questionText = (TextView)itemView.findViewById(R.id.questionText);
mStudentVoted = (TextView)itemView.findViewById(R.id.studentVoted);
mLikeButton = (LikeButton)itemView.findViewById(R.id.like_button_viewpager);
mLikeButton.setOnLikeListener(new OnLikeListener() {
#Override
public void liked(LikeButton likeButton) {
Voting voting = new Voting(getAdapterPosition(),ViewpagerAdapter.this, questionId);
voting.onUpVote();
}
#Override
public void unLiked(LikeButton likeButton) {
Voting voting = new Voting(getAdapterPosition(),ViewpagerAdapter.this, questionId);
voting.onDownVote();
}
});
}
}
}
Voting Class
public class Voting {
private int adapterPosition;
private RecyclerView.Adapter adapter;
private String stringId;
private TextView studentVoted;
//TODO Trim Constructor
public Voting(int adapterPosition,final RecyclerView.Adapter adapter, TextView questionId, TextView studentVoted) {
stringId = questionId.getText().toString();
this.adapter = adapter;
this.studentVoted=studentVoted;
}
public void onUpVote() {
final RequestQueue mRequestQueue = VolleySingleton.getInstance().getRequestQueue();
StringRequest postVoteUp = new StringRequest(Request.Method.PUT, PUT_VOTE_UP, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
System.out.println("Succesful Upvote The Students Value is " + studentVoted);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println("failed Upvote");
}
});
mRequestQueue.add(postVoteUp);
}
public void onDownVote() {
final RequestQueue mrequestQueue = VolleySingleton.getInstance().getRequestQueue();
//TODO Delete Token(inserted for student 3 for testing purposes)
StringRequest postVoteDown = new StringRequest(Request.Method.PUT, PUT_VOTE_DOWN, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//TODO OnResponse, must setLiked(False)
//Succesful downVote The Students Value is true
//studentVoted.setText("false");
System.out.println("Succesful downVote The Students Value is "+studentVoted);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println("failed downVote");
}
});
mrequestQueue.add(postVoteDown);
}
public void realTimeUpVoting(TextView textView){
String voteString= textView.getText().toString();
int voteNumber=Integer.parseInt(voteString)+1;
textView.setText("" + voteNumber);
}
public void realTimeDownVoting(TextView textView){
String voteString= textView.getText().toString();
int voteNumber=Integer.parseInt(voteString)-1;
textView.setText("" + voteNumber);
}
}
Json Request and Parsing Methods
public void JsonRequestMethod() {
mVolleySingleton = VolleySingleton.getInstance();
mRequestQueue = mVolleySingleton.getRequestQueue();
JsonArrayRequest request = new JsonArrayRequest(Request.Method.GET, URL_HOME, (String) null, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
try {
mListblogs.clear();
mListblogs = new YourTask().execute(response).get();
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
mRequestQueue.add(request);
}
private ArrayList<QuestionData> parseJSONResponse(JSONArray response) {
if (!response.equals("")) {
try {
StringBuilder data = new StringBuilder();
for (int x = 0; x < response.length(); x++) {
JSONObject currentQuestions = response.getJSONObject(x);
JSONArray arrSubcategory = currentQuestions.optJSONArray("questions");
for (int y = 0; y < arrSubcategory.length(); y++) {
JSONObject objectSubcategory = arrSubcategory.getJSONObject(y);
String text = objectSubcategory.optString("text");
String studentId = objectSubcategory.optString("studentId");
String votes=objectSubcategory.optString("votes");
/*JSONArray cycles through the array of voters, when a user votes
their ID is added to the array.When they downvote, it is removed
*/
JSONArray voters= objectSubcategory.optJSONArray("voters");
QuestionData questionData = new QuestionData();
questionData.setMstudentId(studentId);
questionData.setMtext(text);
questionData.setVotes(votes);
questionData.setVoters(checkIfVoted(voters));
mQuestionDataArrayList.add(questionData);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return mQuestionDataArrayList;
}
private static String checkIfVoted(JSONArray jsonArray ) {
/*pass in a json Array, copy the array into ints, and if
the students Id is contained in the array return the string true
*/
int[] voteIds = new int[jsonArray.length()];
for(int i=0;i<voteIds.length;i++){
voteIds[i] = jsonArray.optInt(i);
}
for(int i=0;i<voteIds.length;i++){
if(voteIds[i]== Integer.parseInt(Login.getUserId())){
//TODO String was only used for Testing purposes, Convert to Boolean later
return "true";
}
}
return "false";
}

you are currently only updating the textview which is why your recycleview changes state when scrolling.
Should change your voting class and pass the question Data rather textview
public Voting(int adapterPosition,final RecyclerView.Adapter adapter, TextView questionId, TextView studentVoted) {
change to
public Voting(int adapterPosition,final RecyclerView.Adapter adapter, QuestionData questionData, TextView studentVoted) {
// make other changes for the data
and then in
public void realTimeUpVoting(QuestionData questionData){
data.votes++ //something like that. idont know your model
// now call back using interface the recyleview data changed method so it updates the count in recycleview automatically.
Edit
passing the question Data in click button
class ViewDashboard extends RecyclerView.ViewHolder {
public int position
public void onBindViewHolder(ViewDashboard holder, int position) {
holder.position = position
}
public void liked(LikeButton likeButton) {
QuestionData questionHolder = data.get(position);

I have a view and inside that view I have a textview I would like to update that textview?

I have three classes, my adapter class, Voting class, and an acitivty where my JSONrequest is as shown below.The problem is as you can see that I call my JSONrequest in my activity which will get a list of views, inside that view I have a mVote textview. In my adapter you can also see I have a likeButton when someone presses that I would like mVotes to change from 0 to 1. I get all my data from a server so I am assuming I would need to make a new request, do I need to make a new adapter to? and JSON parseing method? How do I do this?!??!
public class AdapterQuestion extends RecyclerView.Adapter<AdapterQuestion.ViewQuestion>{
private LayoutInflater mLayoutInflater;
private ArrayList<QuestionData> data =new ArrayList<>();
public AdapterQuestion(Context context){
//get from context
mLayoutInflater=LayoutInflater.from(context);
}
public void setBloglist(ArrayList<QuestionData> data){
this.data =data;
notifyItemRangeChanged(0, this.data.size());
}
#Override
public ViewQuestion onCreateViewHolder(ViewGroup parent, int viewType){
ViewQuestion holder=new ViewQuestion(view);
return holder;
}
#Override
public void onBindViewHolder(ViewQuestion holder, int position) {
holder.answerText.setText(currentObj.getMtext());
holder.answerId.setText(currentObj.getId());
holder.mVotes.setText(currentObj.getVotes());
holder.mLikeButton.setTag(currentObj);
}
#Override
public int getItemCount() {
return data.size();
}
public class ViewQuestion extends RecyclerView.ViewHolder{
private TextView answerText;
private TextView answerId;
private TextView mVotes;
private LikeButton mLikeButton;
public ViewQuestion (View itemView){
super(itemView);
answerText=(TextView)itemView.findViewById(R.id.answerText);
answerId=(TextView)itemView.findViewById(R.id.answerId);
mVotes=(TextView)itemView.findViewById(R.id.VoteTextView);
mLikeButton= (LikeButton)itemView.findViewById(R.id.heart_buttons);
mLikeButton.setOnLikeListener(new OnLikeListener() {
#Override
public void liked(LikeButton likeButton) {
Voting vote = new Voting();
vote.onUpVote(answerId());
System.out.print("Adapter Position"+getAdapterPosition());
}
#Override
public void unLiked(LikeButton likeButton) {
Voting onDown=new Voting();
onDown.onDownVote(answerId());
}
});
}
public String getVoteView(){
String voteView=mVotes.getText().toString();
return voteView;
}
public String answerId(){
String converted=answerId.getText().toString();
return converted;
}
public int convertToInt(){
String converted=answerId.getText().toString();
int ConvertedInt=Integer.parseInt(converted);
return ConvertedInt;
}
}
}
Voting
public class Voting {
private VolleySingleton mVolleySingleton;
private RequestQueue mRequestQueue;
private AdapterVoteUpdate mAdapterVotes;
private ArrayList<QuestionData> updateVotes = new ArrayList<>();
public void onUpVote(final String answerId) {
final RequestQueue mrequestQueue = VolleySingleton.getInstance().getRequestQueue();
final String PUT_VOTE_UP = "url" + answerId + "url\n";
StringRequest PostVoteUp = new StringRequest(Request.Method.PUT, PUT_VOTE_UP, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
mrequestQueue.add(PostVoteUp);
}
public void onDownVote(final String answerId) {
System.out.println("Voted Down");
final RequestQueue mrequestQueue = VolleySingleton.getInstance().getRequestQueue();
final String PUT_VOTE_DOWN = "url" + answerId + "urul";
StringRequest PostVoteUp = new StringRequest(Request.Method.PUT, PUT_VOTE_DOWN, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
System.out.println("************Answer" + error + "error");
}
});
mrequestQueue.add(PostVoteUp);
}
JSON RequestClass
public void JsonRequestMethod(String Id) {
mVolleySingleton = VolleySingleton.getInstance();
mRequestQueue = mVolleySingleton.getRequestQueue();
final String URL_ANSWER = "url" + Id + "url";
JsonArrayRequest request = new JsonArrayRequest(Request.Method.GET, URL_ANSWER, (String) null, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
mListblogs.clear();
mListblogs = parseJSONResponseQuestion(response);
mAdapterQuestion.setBloglist(mListblogs);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println(error);
}
});
mRequestQueue.add(request);
}
private ArrayList<QuestionData> parseJSONResponseQuestion(JSONArray response) {
if (!response.equals("")) {
ArrayList<QuestionData> questionDataArrayList = new ArrayList<>();
try {
StringBuilder data = new StringBuilder();
for (int i = 0; i < response.length(); i++) {
JSONObject currentQuestions = response.getJSONObject(i);
String text = currentQuestions.getString("text");
String questionId = currentQuestions.getString("questionId");
String votes = currentQuestions.getString("votes");
System.out.println(votes+" VOTES");
int voteInt=Integer.parseInt(votes);
System.out.println(voteInt);
String Answerid = currentQuestions.getString("id");
String selectedId = currentQuestions.getString("selected");
System.out.println(response.length() + "length");
data.append(text + Answerid + "\n");
System.out.println(data);
QuestionData questionData = new QuestionData();
questionData.setMtext(text);
questionData.setVotes(votes);
questionData.setId(Answerid);
questionData.setSelected(selectedId);
mListblogs.add(questionData);
}
System.out.println(data.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
return mListblogs;
}

"I get all my data from a server so I am assuming I would need to make a new request."
-> Actually you don't need to re-request the data from your server again. You just need to update
private ArrayList<QuestionData> data =new ArrayList<>();
on your AdapterQuestion then call AdapterQuestion.notifyDataSetChanged(); after you get a success response from onUpVote or onDownVote
"Do I need to make a new adapter to? and JSON parseing method? How do I do this?!??!"
-> No need

To change a particular ItemView in your recyclerview use this below code.
notifyItemChanged(index);
If you want to change the particular Textview in onItemclick you have to get the item position.
#Override
public void onBindViewHolder(ViewQuestion holder, int position) {
holder.answerText.setText(currentObj.getMtext());
holder.answerId.setText(currentObj.getId());
holder.mVotes.setText(currentObj.getVotes());
holder.mVotes.setTag(currentObj);
holder.mLikeButton.setTag(holder);
}
In your like button click event change the code like the below
mLikeButton.setOnLikeListener(new OnLikeListener() {
#Override
public void liked(LikeButton likeButton) {
Voting vote = new Voting();
vote.onUpVote(answerId());
final ViewQuestion holder=(ViewQuestionholder)likeButton.getTag();
currentObj co=(currentObj)holder.mVotes.getTag();
holder.mVotes.setText("16");
System.out.print("Adapter Position"+getAdapterPosition());
}
#Override
public void unLiked(LikeButton likeButton) {
Voting onDown=new Voting();
onDown.onDownVote(answerId());
final ViewQuestion holder=(ViewQuestionholder)likeButton.getTag();
currentObj co=(currentObj)holder.mVotes.getTag();
holder.mVotes.setText("14");
}
});