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How do I remove all null and empty string values from an object in json java android from retrofit?

How do I remove all null and empty string values from an object in JSON java android from retrofit?
Filter out any items where "name" is blank or null.
this is my Main Activity
Api api = retrofit.create(Api.class);
Call<List<MainData>> call = api.getData();
call.enqueue(new Callback<List<MainData>>() {
#Override
public void onResponse (Call<List<MainData>> call, Response<List<MainData>> response) {
if (!response.isSuccessful()) {
Toast.makeText(MainActivity.this, response.code(), Toast.LENGTH_SHORT).show();
return;
}
List<MainData> postList = response.body();
// Filter out any items where "name" is blank or null.
List<MainData> tempList = new ArrayList<>();
for(MainData data :postList)
{
if(null!= data.getName() && !data.getName().isEmpty()) {
//sort by name
Collections.sort(tempList, (mainData, t1) -> mainData.getName().compareTo(t1.getName()));
//sort by ListId
Collections.sort(tempList, (mainData, t1) -> mainData.getListId().compareTo(t1.getListId()) );
tempList.add(data);
}
}
RecyclerViewAdapter recyclerViewAdapter = new RecyclerViewAdapter(tempList, MainActivity.this);
recyclerView.setAdapter(recyclerViewAdapter);
}
#Override
public void onFailure (Call<List<MainData>> call, Throwable t) {
Toast.makeText(MainActivity.this, t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
This Is My Adpater
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
//initialize variables
List<MainData> dataArrayList;
Context context;
//create constructor
public RecyclerViewAdapter (Context context, List<MainData> dataArrayList) {
this.dataArrayList = dataArrayList;
this.context = context;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder (#NonNull ViewGroup parent, int viewType) {
//this method recycling the view holder
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder (#NonNull ViewHolder holder, int position) {
//initialize Main data
MainData data = dataArrayList.get(position);
//set name on text view
holder.listId.setText(String.format("list_id : %s", data.getListId()));
holder.name.setText(String.format("name : %s", data.getName()));
holder.id.setText(String.format("id : %s", data.getId()));
}
#Override
public int getItemCount () {
return dataArrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
//initialize variables
TextView listId, name, id;
public ViewHolder (#NonNull View itemView) {
super(itemView);
//assign variables
listId = itemView.findViewById(R.id.list_id);
name = itemView.findViewById(R.id.name);
id = itemView.findViewById(R.id.id);
}
}
}
this is the Data
public class MainData {
public String listId, name, id;
public String getListId () {
return listId;
}
public String getName () {
return name;
}
public String getId () {
return id;
}
}
And this is the Api
public interface Api {
#GET("hiring.json")
Call<List<MainData>> getData();
}
And this is my app I want to remove nulls and emp
enter image description here

There are two ways
(1) While inflating the data you can filter these unwanted values
(2) Create a temporary list and add only required values from the main list.
sample code:
List<MainData> tempList = new ArrayList<>();
for(MainData data :postList)
{
if(null!= data.getName() && !data.getName().isEmpty())
{ tempList.add(data);
}
}
And then pass this tempList to the adapter.
Final code would look like this.
Api api = retrofit.create(Api.class);
Call<List<MainData>> call = api.getData();
call.enqueue(new Callback<List<MainData>>() {
#Override
public void onResponse (Call<List<MainData>> call, Response<List<MainData>> response) {
if (!response.isSuccessful()) {
Toast.makeText(MainActivity.this, response.code(), Toast.LENGTH_SHORT).show();
return;
}
List<MainData> postList = response.body();
//sort by ListId
Collections.sort(postList, (mainData, t1) -> mainData.getListId().compareTo(t1.getListId()));
// Filter out any items where "name" is blank or null.
List<MainData> tempList = new ArrayList<>();
for(MainData data :postList)
{
if(null!= data.getName() && !data.getName().isEmpty())
{ tempList.add(data);
}
}
RecyclerViewAdapter recyclerViewAdapter = new RecyclerViewAdapter(MainActivity.this, tempList );
recyclerView.setAdapter(recyclerViewAdapter);
}
#Override
public void onFailure (Call<List<MainData>> call, Throwable t) {
Toast.makeText(MainActivity.this, t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
Feel free to ask if something is unclear.

LiveData isn't being observed properly (gets null) when using Android Pagination Library

I am trying to update the UI depending on whether the data is being loaded or has loaded but it is not working properly. I am using enum class for different states.
Initially the error was
Attempt to invoke virtual method 'void androidx.lifecycle.LiveData.observe(androidx.lifecycle.LifecycleOwner, androidx.lifecycle.Observer)' on a null object reference
Then I passed an empty new MutableLiveData()<>. Now, it doesn't crashes the application, however, the getDataStatus() observer isn't working correctly. Kindly look at my implementations and see if they are right.
DataSource
public class ArticlesDataSource extends PageKeyedDataSource<Integer, NewsItem> {
private static final int FIRST_PAGE = 1;
private static final String TAG = "ArticlesDataSource";
public static final String SORT_ORDER = "publishedAt";
public static final String LANGUAGE = "en";
public static final String API_KEY = Utils.API_KEY;
public static final int PAGE_SIZE = 10;
private String mKeyword;
private MutableLiveData<DataStatus> dataStatusMutableLiveData = new MutableLiveData<>();
public ArticlesDataSource(String keyword) {
mKeyword = keyword;
dataStatusMutableLiveData = new MutableLiveData<>();
}
public MutableLiveData<DataStatus> getDataStatusMutableLiveData() {
return dataStatusMutableLiveData;
}
#Override
public void loadInitial(#NonNull LoadInitialParams<Integer> params, #NonNull LoadInitialCallback<Integer, NewsItem> callback) {
dataStatusMutableLiveData.postValue(DataStatus.LOADING);
NewsAPI newsAPI = ServiceGenerator.createService(NewsAPI.class);
Call<RootJsonData> call = newsAPI.searchArticlesByKeyWord(mKeyword, SORT_ORDER, LANGUAGE, API_KEY, FIRST_PAGE, PAGE_SIZE);
call.enqueue(new Callback<RootJsonData>() {
#Override
public void onResponse(Call<RootJsonData> call, Response<RootJsonData> response) {
if (response.body() != null) {
callback.onResult(response.body().getNewsItems(), null, FIRST_PAGE + 1);
dataStatusMutableLiveData.postValue(DataStatus.LOADED);
}
}
#Override
public void onFailure(Call<RootJsonData> call, Throwable t) {
Log.d(TAG, "onFailure: " + t.getMessage());
dataStatusMutableLiveData.postValue(DataStatus.ERROR);
}
});
}
#Override
public void loadBefore(#NonNull LoadParams<Integer> params, #NonNull LoadCallback<Integer, NewsItem> callback) {
NewsAPI newsAPI = ServiceGenerator.createService(NewsAPI.class);
Call<RootJsonData> call = newsAPI.searchArticlesByKeyWord(mKeyword, SORT_ORDER, LANGUAGE, API_KEY, FIRST_PAGE, PAGE_SIZE);
call.enqueue(new Callback<RootJsonData>() {
#Override
public void onResponse(Call<RootJsonData> call, Response<RootJsonData> response) {
// if the current page is greater than one
// we are decrementing the page number
// else there is no previous page
Integer adjacentKey = (params.key > 1) ? params.key - 1 : null;
if (response.body() != null) {
// passing the loaded data
// and the previous page key
callback.onResult(response.body().getNewsItems(), adjacentKey);
}
}
#Override
public void onFailure(Call<RootJsonData> call, Throwable t) {
Log.d(TAG, "onFailure: " + t.getMessage());
}
});
}
#Override
public void loadAfter(#NonNull LoadParams<Integer> params, #NonNull LoadCallback<Integer, NewsItem> callback) {
NewsAPI newsAPI = ServiceGenerator.createService(NewsAPI.class);
Call<RootJsonData> call = newsAPI.searchArticlesByKeyWord(mKeyword, SORT_ORDER, LANGUAGE, API_KEY, params.key, PAGE_SIZE);
call.enqueue(new Callback<RootJsonData>() {
#Override
public void onResponse(Call<RootJsonData> call, Response<RootJsonData> response) {
dataStatusMutableLiveData.postValue(DataStatus.LOADED);
if (response.code() == 429) {
// no more results
List<NewsItem> emptyList = new ArrayList<>();
callback.onResult(emptyList, null);
}
if (response.body() != null) {
// if the response has next page
// incrementing the next page number
Integer key = params.key + 1;
// passing the loaded data and next page value
if (!response.body().getNewsItems().isEmpty()) {
callback.onResult(response.body().getNewsItems(), key);
}
}
}
#Override
public void onFailure(Call<RootJsonData> call, Throwable t) {
Log.d(TAG, "onFailure: " + t.getMessage());
dataStatusMutableLiveData.postValue(DataStatus.ERROR);
}
});
}
}
DataSourceFactory
public class ArticlesDataSourceFactory extends DataSource.Factory {
private final MutableLiveData<ArticlesDataSource> itemLiveDataSource;
private String mQuery;
private final LiveData<DataStatus> dataStatusLiveData = Transformations.switchMap(itemLiveDataSource, (itemDataSource) -> {
return itemDataSource.getDataStatusMutableLiveData();
});
public ArticlesDataSourceFactory() {
mQuery = "news";
itemLiveDataSource = new MutableLiveData<>();
}
#Override
public DataSource<Integer, NewsItem> create() {
ArticlesDataSource itemDataSource = new ArticlesDataSource(mQuery);
itemLiveDataSource.postValue(itemDataSource);
// dataStatusMutableLiveData = itemDataSource.getDataStatusMutableLiveData();
return itemDataSource;
}
public MutableLiveData<ArticlesDataSource> getArticlesLiveDataSource() {
return itemLiveDataSource;
}
public void setQuery(String query) {
mQuery = query;
}
public MutableLiveData<DataStatus> getDataStatusMutableLiveData() {
return dataStatusMutableLiveData;
}
public void setDataStatusMutableLiveData(DataStatus dataStatus){
dataStatusMutableLiveData.postValue(dataStatus);
}
public LiveData<DataStatus> getDataStatusLiveData() {
return dataStatusLiveData;
}
}
ViewModel
public class ArticlesViewModel extends ViewModel {
public LiveData<PagedList<NewsItem>> itemPagedList;
private MutableLiveData<ArticlesDataSource> liveDataSource;
private ArticlesDataSourceFactory articlesDataSourceFactory;
private LiveData dataStatus = new MutableLiveData<>();
public ArticlesViewModel() {
articlesDataSourceFactory = new ArticlesDataSourceFactory();
liveDataSource = articlesDataSourceFactory.getArticlesLiveDataSource();
dataStatus = articlesDataSourceFactory.getDataStatusMutableLiveData();
PagedList.Config pagedListConfig =
(new PagedList.Config.Builder())
.setEnablePlaceholders(false)
.setPageSize(10).build();
itemPagedList = (new LivePagedListBuilder(articlesDataSourceFactory, pagedListConfig)).build();
}
public void setKeyword(String query) {
if (query.equals("") || query.length() == 0)
articlesDataSourceFactory.setDataStatusMutableLiveData(DataStatus.EMPTY);
else {
articlesDataSourceFactory.setQuery(query);
refreshData();
}
}
void refreshData() {
if (itemPagedList.getValue() != null) {
itemPagedList.getValue().getDataSource().invalidate();
}
}
public LiveData<DataStatus> getDataStatus() {
return dataStatus;
}
}
Fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_articles, container, false);
mContext = getActivity();
progressBar = rootView.findViewById(R.id.progress_circular);
emptyStateTextView = rootView.findViewById(R.id.empty_view);
swipeRefreshLayout = rootView.findViewById(R.id.swipe_refresh);
textViewTitle = rootView.findViewById(R.id.text_view_top_headlines);
recyclerView = rootView.findViewById(R.id.recycler_view);
if (savedInstanceState != null) {
keyword = savedInstanceState.getString("keyword");
}
initEmptyRecyclerView();
articlesViewModel = ViewModelProviders.of(this).get(ArticlesViewModel.class);
articlesViewModel.itemPagedList.observe(getViewLifecycleOwner(), new Observer<PagedList<NewsItem>>() {
#Override
public void onChanged(PagedList<NewsItem> newsItems) {
adapter.submitList(newsItems);
// TODO: Handle UI changes
// handleUIChanges(newsItems);
}
});
articlesViewModel.getDataStatus().observe(getViewLifecycleOwner(), new Observer<DataStatus>() {
#Override
public void onChanged(DataStatus dataStatus) {
switch (dataStatus) {
case LOADED:
progressBar.setVisibility(View.GONE);
emptyStateTextView.setVisibility(View.INVISIBLE);
swipeRefreshLayout.setRefreshing(false);
textViewTitle.setVisibility(View.VISIBLE);
break;
case LOADING:
progressBar.setVisibility(View.VISIBLE);
swipeRefreshLayout.setRefreshing(true);
textViewTitle.setVisibility(View.INVISIBLE);
emptyStateTextView.setVisibility(View.INVISIBLE);
break;
case EMPTY:
progressBar.setVisibility(View.GONE);
swipeRefreshLayout.setRefreshing(false);
textViewTitle.setVisibility(View.INVISIBLE);
emptyStateTextView.setVisibility(View.VISIBLE);
emptyStateTextView.setText(R.string.no_news_found);
break;
case ERROR:
progressBar.setVisibility(View.GONE);
swipeRefreshLayout.setRefreshing(false);
textViewTitle.setVisibility(View.INVISIBLE);
emptyStateTextView.setVisibility(View.VISIBLE);
emptyStateTextView.setText(R.string.no_internet_connection);
break;
}
}
});
swipeRefreshLayout.setOnRefreshListener(() -> {
articlesViewModel.setKeyword(keyword);
});
setHasOptionsMenu(true);
return rootView;
}
DataStatus
public enum DataStatus {
ERROR,
LOADING,
LOADED,
EMPTY
}

When you call invalidate(), a new datasource will be created by the factory. However, you are directly exposing the data status liveData of the "current" created datasource, without taking into consideration that more will be created in the future.
The solution is to store the current data source in the factory in a MutableLiveData, and expose the "most recent current data status" using switchMap.
public class ArticlesDataSourceFactory extends DataSource.Factory {
private final MutableLiveData<ArticlesDataSource> itemLiveDataSource = new MutableLiveData<>();
private String mQuery = "news";
private final LiveData<DataStatus> dataStatusLiveData = Transformations.switchMap(itemLiveDataSource, (itemDataSource) -> {
return itemDataSource.getDataStatusMutableLiveData();
});
public ArticlesDataSourceFactory() {
}
#Override
public DataSource<Integer, NewsItem> create() {
ArticlesDataSource itemDataSource = new ArticlesDataSource(mQuery);
itemLiveDataSource.postValue(itemDataSource);
...
public LiveData<DataStatus> getDataStatusLiveData() {
return dataStatusLiveData;
}

Can't display data in ListView using Retrofit

I 've problem with display data in ListView. I get data from Retrofit response, but my activity, which should display this data, is just beeing blank, all the time. I am sure, that I've receiving data, I've checked it, in console.
Model class
public class itemList_model {
#SerializedName("results")
private List<itemList_Results> results;
public List<itemList_Results> getResults() {
return results;
}
public static class itemList_Results{
#SerializedName("title")
String title;
#SerializedName("vote_average")
Double vote;
#SerializedName("genre_ids")
List<Integer> genresId;
#SerializedName("release_date")
String releaseDate;
public itemList_Results(String title, Double vote, String releaseDate) {
this.title = title;
this.vote = vote;
this.releaseDate = releaseDate;
}
public String getTitle() {
return title;
}
public Double getVote() {
return vote;
}
public List<Integer> getGenresId() {
return genresId;
}
public String getReleaseDate() {
return releaseDate;
}
}
public class itemList_genresId{
#SerializedName("genre_ids")
int id;
public int getId() {
return id;
}
}
}
adapter class
public class genres_adapter extends ArrayAdapter<itemList_model.itemList_Results> {
RetrofitCalls calls;
public genres_adapter(#NonNull Context context, ArrayList<itemList_model.itemList_Results> list) {
super(context, 0, list);
}
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
View itemView = convertView;
if (itemView == null){
itemView = LayoutInflater.from(getContext()).inflate(R.layout.genres_item_view, parent, false);
}
itemList_model.itemList_Results model = getItem(position);
TextView title = itemView.findViewById(R.id.title);
title.setText(model.getTitle());
TextView vote = itemView.findViewById(R.id.vote);
vote.setText(String.valueOf(model.getVote()));
TextView release = itemView.findViewById(R.id.release);
release.setText(model.getReleaseDate());
return itemView;
}
}
activity java class
ArrayList<itemList_model.itemList_Results> arrayList;
genres_adapter adapter;
String title = "";
Double average_votes = 0.0;
String date = "";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_genres_list_view);
arrayList = new ArrayList<itemList_model.itemList_Results>();
adapter = new genres_adapter(this, arrayList);
ListView listView = (ListView) findViewById(R.id.genres_listView);
listView.setAdapter(adapter);
getListViewItems();
}
public void getListViewItems(){
String url = "https://api.themoviedb.org/";
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url)
.addConverterFactory(GsonConverterFactory.create())
.build();
apiCall api = retrofit.create(apiCall.class);
Call<itemList_model> call = api.getHorror();
call.enqueue(new Callback<itemList_model>() {
#Override
public void onResponse(Call<itemList_model> call, Response<itemList_model> response) {
if (!response.isSuccessful()) {
Log.i(TAG, "onResponse: " + response.code());
}
List<itemList_model.itemList_Results> list = response.body().getResults();
for (itemList_model.itemList_Results model : list){
title =model.getTitle();
average_votes = Double.valueOf(model.getVote());
date =model.getReleaseDate();
}
list.add(new itemList_model.itemList_Results(title,average_votes,date));
}
#Override
public void onFailure(Call<itemList_model> call, Throwable t) {
Log.i(TAG, "onFailure: "+t.getMessage());
}
});
}
activity, that contains ListView, is called activity_genres_list_view
activity which will be used by adapter, is called genres_item_view
I'm guess, it's about data from list, maybe it's not being added?

Apparently, you should add your list to adapter after you received it:
adapter.addAll(list);

I cannot see any notifyDataSetChanged() call in your code. When the response is found from the Retrofit call, you need to update the list which was passed to the adapter and call notifyDataSetChanged on your adapter to see the effect.
Hence you might consider doing something like the following.
public void getListViewItems(){
String url = "https://api.themoviedb.org/";
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url)
.addConverterFactory(GsonConverterFactory.create())
.build();
apiCall api = retrofit.create(apiCall.class);
Call<itemList_model> call = api.getHorror();
call.enqueue(new Callback<itemList_model>() {
#Override
public void onResponse(Call<itemList_model> call, Response<itemList_model> response) {
if (!response.isSuccessful()) {
Log.i(TAG, "onResponse: " + response.code());
}
// Do not create a new list here. Use the arrayList which was declared before and passed to the adapter
// List<itemList_model.itemList_Results> list = response.body().getResults();
// Clear the arrayList before pushing new data
arrayList.clear();
for (itemList_model.itemList_Results model : list){
title =model.getTitle();
average_votes = Double.valueOf(model.getVote());
date = model.getReleaseDate();
// Add the data into the arrayList instead of the list
arrayList.add(new itemList_model.itemList_Results(title,average_votes,date));
}
// Now call notifyDataSetChanged on your adapter to see the changes in the ListView
adapter.notifyDataSetChanged();
}
#Override
public void onFailure(Call<itemList_model> call, Throwable t) {
Log.i(TAG, "onFailure: "+t.getMessage());
}
});
}
Hope that fixes your problem.

Nothing appear because you are setting adapter before getting information :
adapter = new genres_adapter(this, arrayList);//array list is still empty here
listView.setAdapter(adapter);
getListViewItems();
what yo should do is setting adapter once you get the list ! or call notifydatasetChanged on your adapter after you get your informations !
{
.....
arrayList.add(new itemList_model.itemList_Results(title,average_votes,date));
.....
}
adapter.notifyDataSetChanged();

Retrofit2 HTTP Get Json to RecyclerView

I am trying to use Retrofit2 to retrieve data as JSON and then parsing it to my RecyclerView adapter, but whatever I do I can't figure out how to get this thing to work.
At the moment, I can load up one RecyclerView with local DBFlow data, but can't figure out how to do it for the JSON that I HTTP GET with Retrofit2 for my second RecyclerView. I have the code below so far, which loads the JSON in the Log. But can't parse it to the RecyclerView.
MainActivity.java:
onCreate() {
...
mGithubApi = ApiUtils.getApi();
mGithubRecyclerView = (RecyclerView)
findViewById(R.id.github_repository_recyclerview);
RecyclerView.LayoutManager mGithubLayoutManager = new
LinearLayoutManager(getApplicationContext());
mGithubRecyclerView.setLayoutManager(mGithubLayoutManager);
mGithubRecyclerView.setHasFixedSize(true);
...
loadGithubUserRepositoryJson();
}
// Load Github repo JSON
public void loadGithubUserRepositoryJson() {
Call<ResponseBody> result = api.getRepos("motivecodex");
result.enqueue(new Callback<ResponseBody>() {
#Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
try {
Log.e(LOG_TAG, response.body().string());
mGithubAdapter = new GithubRepositoriesAdapter((List<GithubRepository>) mGithubRepository);
mGithubRecyclerView.setAdapter(mGithubAdapter);
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
Log.e("MainActivity", "error loading from API");
}
});
}
GithubRepositoryAdapter.java
public class GithubRepositoriesAdapter extends RecyclerView.Adapter<GithubRepositoriesAdapter.RepositoryViewHolder> {
private List<GithubRepository> githubRepositoryList;
public class RepositoryViewHolder extends RecyclerView.ViewHolder {
public TextView repository, commits, stars, forks;
public RepositoryViewHolder(View view) {
super(view);
repository = (TextView) view.findViewById(R.id.listitem_repository);
commits = (TextView) view.findViewById(R.id.listitem_commits);
stars = (TextView) view.findViewById(R.id.listitem_stars);
forks = (TextView) view.findViewById(R.id.listitem_forked);
}
}
public GithubRepositoriesAdapter(List<GithubRepository> githubRepositoryList) {
this.githubRepositoryList = githubRepositoryList;
}
#Override
public RepositoryViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.listitem_repository, parent, false);
return new RepositoryViewHolder(itemView);
}
#Override
public void onBindViewHolder(RepositoryViewHolder holder, int position) {
GithubRepository githubRepository = githubRepositoryList.get(position);
holder.repository.setText(githubRepository.getName());
holder.commits.setText(githubRepository.getStargazersCount());
holder.stars.setText(githubRepository.getStargazersCount());
holder.forks.setText(githubRepository.getForks());
}
#Override
public int getItemCount() {
return githubRepositoryList.size();
}
}
interface Api.java:
#GET("users/{user}/repos")
Call<List<GithubRepository>> listRepos(#Path("user") String user);
model GithubRepository.java
public class GithubRepository {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("full_name")
#Expose
private String fullName;
#SerializedName("stargazers_count")
#Expose
private Integer stargazersCount;
#SerializedName("forks")
#Expose
private Integer forks;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getFullName() {
return fullName;
}
public void setFullName(String fullName) {
this.fullName = fullName;
}
public Integer getStargazersCount() {
return stargazersCount;
}
public void setStargazersCount(Integer stargazersCount) {
this.stargazersCount = stargazersCount;
}
public Integer getForks() {
return forks;
}
public void setForks(Integer forks) {
this.forks = forks;
}
}
ApiUtil.java
public static final String BASE_URL = "https://api.github.com/users/";
public static Api getApi() {
return RetrofitClient.getClient(BASE_URL).create(Api.class);
}
RetrofitClient.java
public class RetrofitClient {
private static Retrofit retrofit = null;
public static Retrofit getClient(String baseUrl) {
if (retrofit == null) {
retrofit = new Retrofit.Builder()
.baseUrl(baseUrl)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}

Instead of Log (this approximately as I can't see your types):
localRepositoryList.addAll(response.body());
adapter.notifyDataSetChanged();
P.S: I assume you have in the code something like:
GithubRepositoriesAdapter adapter=new GithubRepositoriesAdapter(localRepositoryList);
mGithubRecyclerView.setAdapter(adapter);
Another option in log place:
mGithubRecyclerView.setAdapter(new GithubRepositoriesAdapter(response.body()));
UPDATE:
public void loadGithubUserRepositoryJson() {
api.listRepos("motivecodex").enqueue(new Callback<List<GithubRepository>>() {
#Override
public void onResponse(Call<List<GithubRepository>> call, Response<List<GithubRepository>> response) {
try {
Log.e(LOG_TAG, response.body().string());
mGithubAdapter = new GithubRepositoriesAdapter(response.body());
mGithubRecyclerView.setAdapter(mGithubAdapter);
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Call<List<GithubRepository>> call, Throwable t) {
Log.e("MainActivity", "error loading from API");
}
});
}

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");
}
});