Develop Reference

Fragment loading data wrong data when I click in RecyclerView item

So I've been trying to fix this issue for so many hours but can't find the cause behind it.
Issue: My app shows data from my API into recyclerView, a standard feature. The issue comes when I use the search function. When I search for something, my search adapter shows the query data but going back to my Main fragment again, the view loader shows content fine but when I click on it, search items are actually being loaded instead.
Check my app to find out what I'm talking about: https://play.google.com/store/apps/details?id=envision.apps.newsextra
To reproduce, search for something, click on any article from search results, then go back and click any article from main feed, search items are actually being loaded instead.
Here's my main fragment:
public class FeedsFragment extends Fragment implements ArticleListener, LocalMessageCallback {
private PullRefreshLayout pullRefreshLayout;
private RecyclerView recyclerView;
private FeedsAdapter adapter;
private View layout;
private ArrayList<Object> data = new ArrayList<>();
private List<Favorites> favorites = new ArrayList<>();
private List<Articles> articles = new ArrayList<>();
private boolean init = true;
private DataViewModel dataViewModel;
private NativeAdsManager mNativeAdsManager;
private String sort_date = SharedPrefernces.getFeedSortDate();
public static FeedsFragment newInstance() {
return new FeedsFragment();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
layout = inflater.inflate(R.layout.feeds_fragment_layout, container, false);
init_views();
setRecyclerView();
initNativeAds();
dataViewModel = ViewModelProviders.of(this).get(DataViewModel.class);
dataViewModel.getFavorites().observe(this, favorites -> {
if(favorites!=null){
this.favorites = favorites;
}
});
dataViewModel.getArticles().observe(this, articles -> {
this.articles = articles;
if(init) {
if (articles!= null && articles.size() > 0) {
//this.articles = articles;
data = new ArrayList<>();
if(SharedPrefernces.getActiveInterest().equalsIgnoreCase(getString(R.string.all_stories))){
data.add(new Info("Showing stories based on all your interests"));
}else{
data.add(new Info("Showing stories on "+SharedPrefernces.getActiveInterest()));
}
data.addAll(articles);
adapter.setData(data);
}
init = false;
}
});
new Handler().postDelayed(() -> {
//we first check if time set to fetch feeds again has elapsed
pullRefreshLayout.setRefreshing(true);
fetchFeeds();
SharedPrefernces.setReloadArticles(false);
}, 1000);
return layout;
}
//init view layouts
private void init_views(){
pullRefreshLayout = layout.findViewById(R.id.pullRefreshLayout);
int[] colorScheme = getResources().getIntArray(R.array.refresh_color_scheme);
pullRefreshLayout.setColorSchemeColors(colorScheme);
pullRefreshLayout.setOnRefreshListener(this::fetchFeeds);
}
//init recyclerview
private void setRecyclerView() {
recyclerView = (RecyclerView) layout.findViewById(R.id.recyclerView);
GridLayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 1);
recyclerView.setLayoutManager(mLayoutManager);
adapter = new FeedsAdapter(getActivity(),recyclerView,this);
//int index = movies.size() - 1;
adapter.setLoadMoreListener(() -> recyclerView.post(() -> {
if(data.size()>0 && data.get(1) instanceof Articles){
adapter.setLoader();
loadMoreFeeds();
}
}));
recyclerView.setAdapter(adapter);
}
private void initNativeAds(){
mNativeAdsManager = new NativeAdsManager(getActivity(), getResources().getString(R.string.FACEBOOK_FEED_NATIVE_AD), 10);
mNativeAdsManager.loadAds();
mNativeAdsManager.setListener(new NativeAdsManager.Listener() {
#Override
public void onAdsLoaded() {
}
#Override
public void onAdError(AdError adError) {
}
});
}
private void fetchFeeds(){
if(!NetworkUtil.hasConnection(getActivity())) {
setNetworkError();
return;
}
NetworkService service = StringApiClient.createServiceWithToken(NetworkService.class);
try {
JSONObject jsonData = new JSONObject();
if(SharedPrefernces.getActiveInterest().equalsIgnoreCase(getString(R.string.all_stories))) {
jsonData.put("interests", new JSONArray(SharedPrefernces.getUserInterests()));
}else{
ArrayList<String> interest = new ArrayList<>();
interest.add(SharedPrefernces.getActiveInterest());
jsonData.put("interests", new JSONArray(interest));
}
if(SharedPrefernces.getUserUnfollowedFeedSources()!=null && SharedPrefernces.getUserUnfollowedFeedSources().size()>0) {
jsonData.put("sources", new JSONArray(SharedPrefernces.getUserUnfollowedFeedSources()));
}
jsonData.put("location", Misc.getCurrentCountryCode());
String requestBody = jsonData.toString();
Log.e("final requestbody",requestBody);
Call<String> callAsync = service.getArticles(requestBody);
callAsync.enqueue(new Callback<String>() {
#Override
public void onResponse(#NonNull Call<String> call, #NonNull Response<String> response) {
Log.e("response",String.valueOf(response.body()));
pullRefreshLayout.setRefreshing(false);
if(response.body()==null){
setNetworkError();
return;
}
try {
JSONObject res = new JSONObject(response.body());
// Add Your Logic
if(res.getString("status").equalsIgnoreCase("ok")){
//create a new object
data = new ArrayList<>();
if(SharedPrefernces.getActiveInterest().equalsIgnoreCase(getString(R.string.all_stories))){
data.add(new Info("Showing stories based on all your interests"));
}else{
data.add(new Info("Showing Stories on "+SharedPrefernces.getActiveInterest()));
}
sort_date = res.getString("date");
SharedPrefernces.setFeedSortDate(sort_date);
ArrayList<Articles> articles = JsonParser.getArticles(res.getJSONArray("feeds"));
//delete all previously store articles, and add new items to database
dataViewModel.deleteAllArticles();
dataViewModel.insertAllArticles(articles);
//append interests to our object list
data.addAll(articles);
//set data to adapter
adapter.setData(data);
//set last fetched time to sharedpreferences
if(articles.size()>0)SharedPrefernces.setArticleLastRefreshTime(System.currentTimeMillis());
}
}catch (Exception e){
e.printStackTrace();
Log.e("error",e.getMessage());
}
}
#Override
public void onFailure(#NonNull Call<String> call, #NonNull Throwable throwable) {
Log.e("error",String.valueOf(throwable.getMessage()));
setNetworkError();
pullRefreshLayout.setRefreshing(false);
}
});
} catch (JSONException e) {
Log.e("parse error",e.getMessage());
e.printStackTrace();
}
}
private void loadMoreFeeds(){
// ToDo
}
private void setNetworkError(){
dataViewModel.deleteAllArticles();
dataViewModel.insertAllArticles(articles);
pullRefreshLayout.setRefreshing(false);
data = new ArrayList<>();
if(SharedPrefernces.getActiveInterest().equalsIgnoreCase(App.getContext().getString(R.string.all_stories))){
data.add(new Info("Showing stories based on all your interests"));
}else{
data.add(new Info("Showing stories on "+SharedPrefernces.getActiveInterest()));
}
data.add(new Error(""));
adapter.setData(data);
}
#Override
public void OnItemClick(Articles article) {
//List<Integer> contestWinners = data.subList(0, 5);
int position = 0;
for (Articles arts: this.articles) {
if(arts.getId() == article.getId()){
position = this.articles.indexOf(arts);
}
}
Gson gson = new Gson();
String json = gson.toJson(article);
Intent intent = new Intent(getActivity(), FeedViewerActivity.class);
intent.putExtra("position", position);
intent.putExtra("article",json);
intent.putExtra(FeedViewerActivity.VIEW_TYPE, Constants.ARTICLE_VIEW);
intent.putExtra(FeedViewerActivity.VIEW_SIZE, get_feeds_view_size(this.articles,position));
startActivity(intent);
Objects.requireNonNull(getActivity()).overridePendingTransition(R.anim.slide_left_in, R.anim.still);
}
#Override
public void OnPinClick(Articles articles,String action) {
if(articles==null)return;
if(action.equalsIgnoreCase(getResources().getString(R.string.add_pin))){
dataViewModel.insertFavorites(ObjectMapper.mapFavorites(articles));
}else {
dataViewModel.deleteFavorite(ObjectMapper.mapFavorites(articles).getId());
}
}
#Override
public void OnShareClick(Articles articles) {
Intent share = new Intent(android.content.Intent.ACTION_SEND);
share.setType("text/plain");
share.putExtra(Intent.EXTRA_SUBJECT, articles.getTitle());
share.putExtra(Intent.EXTRA_TEXT, articles.getLink());
startActivity(Intent.createChooser(share, "Share Article"));
}
#Override
public boolean IsPinned(Articles articles) {
for (Favorites fav: favorites) {
if(fav.getId() == articles.getId()){
return true;
}
}
return false;
}
#Override
public void requestAds(int position) {
NativeAd ad = mNativeAdsManager.nextNativeAd();
if(ad!=null){
adapter.setAd(ad,position);
}
}
#Override
public void loadSingleFeedsActivity(Articles articles) {
Gson gson = new Gson();
String myJson = gson.toJson(articles);
Intent intent = new Intent(getActivity(), FeedSourceActivity.class);
intent.putExtra("article", myJson);
startActivity(intent);
}
#Override
public boolean isSingleFeedsActivity() {
return false;
}
#Override
public void onDestroy() {
LocalMessageManager.getInstance().send(R.id.remove_listener);
LocalMessageManager.getInstance().removeListener(this);
super.onDestroy();
}
#Override
public void onStart() {
super.onStart();
LocalMessageManager.getInstance().addListener(this);
}
#Override
public void handleMessage(#NonNull LocalMessage localMessage) {
if(localMessage.getId() == R.id.reload_feeds){
pullRefreshLayout.setRefreshing(true);
fetchFeeds();
SharedPrefernces.setReloadArticles(false);
}
if(localMessage.getId() == R.id.scroll_feeds_to_top){
recyclerView.smoothScrollToPosition(0);
}
}
}
Adapter:
public class FeedsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements View.OnClickListener {
private ArrayList<Object> data = new ArrayList<>();
private Context context;
private int lastItemPosition = -1;
private final int VIEW_TYPE_HEADER = 1;
private final int VIEW_TYPE_LIST = 2;
private final int VIEW_TYPE_LOADER = 3;
private final int VIEW_TYPE_NETWORK_ERROR = 4;
private final int VIEW_TYPE_INFO = 5;
private final int VIEW_TYPE_AD = 6;
private boolean isLoading = false;
private LoadMoreListener loadMoreListener;
private int visibleThreshold = 2;//visible items before loading next feeds
private int firstVisibleItem,lastVisibleItem, totalItemCount;
private ArticleListener articleListener;
public FeedsAdapter(Context context, RecyclerView mRecyclerView, ArticleListener articleListener) {
this.context=context;
this.articleListener = articleListener;
final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
LocalMessageManager.getInstance().send(R.id.recyclerview_scroll);
firstVisibleItem = linearLayoutManager.findFirstVisibleItemPosition();
totalItemCount = linearLayoutManager.getItemCount();
lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
if ((firstVisibleItem + Constants.ADS.NUMBER_OF_ITEMS_BEFORE_REQUEST_AD) % Constants.ADS.LOAD_ADS_AT_POSITION == 0){
//
int pos = firstVisibleItem + Constants.ADS.NUMBER_OF_ITEMS_BEFORE_REQUEST_AD;
if(pos > lastItemPosition && data.size()>pos && data.get(pos - 1) != null/*dont load ad if we r currently making a request*/) {
if (!(data.get(pos) instanceof NativeAd)) {
articleListener.requestAds(pos);
}
}
}
if (!isLoading && NetworkUtil.hasConnection(context)) {
if (totalItemCount <= (lastVisibleItem + visibleThreshold)) {
if (loadMoreListener != null) {
loadMoreListener.onLoadMore();
}
isLoading = true;
}
}
}
});
}
#Override
public int getItemViewType(int position) {
if(data.get(position) instanceof Error)return VIEW_TYPE_NETWORK_ERROR;
if(data.get(position) instanceof Info)return VIEW_TYPE_INFO;
if(data.get(position) instanceof NativeAd)return VIEW_TYPE_AD;
if(SharedPrefernces.get_feed_images_show()
&& SharedPrefernces.get_feed_type() == 1
&& position==1 && data.get(position) instanceof Articles){
return VIEW_TYPE_HEADER;
}
if(data.get(position) == null)return VIEW_TYPE_LOADER;
return VIEW_TYPE_LIST;
}
public void setData(ArrayList<Object> objectList) {
Log.e("objectList size",String.valueOf(objectList.size()));
this.data.clear();
this.data.addAll(objectList);
Log.e("data size",String.valueOf(data.size()));
this.notifyDataSetChanged();
}
public void setMoreData(ArrayList<Articles> articles) {
//int start = data.size() + 2;
data.addAll(articles);
//this.notifyItemRangeInserted(start, articles.size());
this.notifyDataSetChanged();
}
public void setAd(NativeAd ad, int pos) {
data.add(pos, ad);
this.notifyItemInserted(pos);
}
#Override
public int getItemCount() {
return data != null ? data.size() : 0;
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, final int position) {
lastItemPosition = position;
//Log.e("view type",String.valueOf(holder.getItemViewType()));
switch (holder.getItemViewType()) {
case VIEW_TYPE_LIST: case VIEW_TYPE_HEADER:
final ArticleViewHolder viewHolder = (ArticleViewHolder) holder;
viewHolder.bindTo((Articles) data.get(position));
break;
case VIEW_TYPE_LOADER:
final ViewLoader viewLoader = (ViewLoader) holder;
viewLoader.rotateLoading.start();
break;
case VIEW_TYPE_NETWORK_ERROR:
ViewError viewError = (ViewError) holder;
if(SharedPrefernces.getUseNightMode()){
viewError.img.setColorFilter(App.getContext().getResources().getColor(R.color.white));
}else{
viewError.img.setColorFilter(App.getContext().getResources().getColor(R.color.black));
}
break;
case VIEW_TYPE_INFO:
final ViewInfo viewInfo = (ViewInfo) holder;
Info info = (Info)data.get(position);
viewInfo.body.setText(info.getContent());
break;
case VIEW_TYPE_AD:
final AdsViewHolder adsViewHolder = (AdsViewHolder) holder;
NativeAd nativeAd = (NativeAd)data.get(position);
adsViewHolder.bind(nativeAd);
break;
}
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int i) {
RecyclerView.ViewHolder viewHolder = null;
LayoutInflater inflater = LayoutInflater.from(context);
switch (i) {
case VIEW_TYPE_HEADER:
View v = inflater.inflate(R.layout.feeds_header, parent, false);
viewHolder = new ArticleViewHolder(v, articleListener);
break;
case VIEW_TYPE_LIST:
View va;
if(SharedPrefernces.get_feed_images_show() && SharedPrefernces.get_feed_type()==0){
va = inflater.inflate(R.layout.large_image_feeds_list, parent, false);
}else{
va = inflater.inflate(R.layout.feeds_list, parent, false);
}
viewHolder = new ArticleViewHolder(va, articleListener);
break;
case VIEW_TYPE_LOADER:
View ld = inflater.inflate(R.layout.loader, parent, false);
viewHolder = new ViewLoader(ld);
break;
case VIEW_TYPE_NETWORK_ERROR:
View ne = inflater.inflate(R.layout.no_stories, parent, false);
viewHolder = new ViewError(ne);
break;
case VIEW_TYPE_INFO:
View info = inflater.inflate(R.layout.info, parent, false);
viewHolder = new ViewInfo(info);
break;
case VIEW_TYPE_AD:
View ads = inflater.inflate(R.layout.ad_item_large, parent, false);
viewHolder = new AdsViewHolder(ads);
break;
}
return viewHolder;
}
#Override
public void onClick(View view) {
//int pos = (int) view.getTag();
switch (view.getId()){
case R.id.pin:
break;
case R.id.share:
break;
}
}
public class ViewLoader extends RecyclerView.ViewHolder {
private RotateLoading rotateLoading;
ViewLoader(View view) {
super(view);
rotateLoading = (RotateLoading) view.findViewById(R.id.rotateloading);
}
}
public class ViewError extends RecyclerView.ViewHolder {
private ImageView img;
ViewError(View view) {
super(view);
img = view.findViewById(R.id.img);
}
}
public class ViewInfo extends RecyclerView.ViewHolder {
private TextView body;
ViewInfo(View view) {
super(view);
body = view.findViewById(R.id.body);
}
}
public void setLoaded(){
data.remove(data.size()-1);
this.notifyItemRemoved(data.size()-1);
isLoading = false;
}
public void setLoadMoreListener(LoadMoreListener loadMoreListener) {
this.loadMoreListener = loadMoreListener;
}
public void setLoader(){
data.add(null);
this.notifyItemInserted(data.size()-1);
}
}
Search Adapter:
public class SearchAdapter extends RecyclerView.Adapter< RecyclerView.ViewHolder>{
private List<Object> items = new ArrayList<>();
private final int VIEW_TYPE_MEDIA = 0;
private final int VIEW_TYPE_LOADING = 1;
private final int VIEW_TYPE_AD = 2;
private SearchClickListener searchClickListener;
private LoadMoreListener mOnLoadMoreListener;
private boolean isLoading;
private int visibleThreshold = 2;
public int firstVisibleItem,lastVisibleItem, totalItemCount;
private int lastItemPosition = -1;
public SearchAdapter(RecyclerView mRecyclerView, SearchClickListener searchClickListener) {
this.searchClickListener = searchClickListener;
final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
firstVisibleItem = linearLayoutManager.findFirstVisibleItemPosition();
totalItemCount = linearLayoutManager.getItemCount();
lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
if ((firstVisibleItem + Constants.ADS.NUMBER_OF_ITEMS_BEFORE_REQUEST_AD) % Constants.ADS.LOAD_ADS_AT_POSITION == 0){
//
int pos = firstVisibleItem + Constants.ADS.NUMBER_OF_ITEMS_BEFORE_REQUEST_AD;
if(pos > lastItemPosition && items.size()>pos && items.get(pos - 1) != null/*dont load ad if we r currently making a request*/) {
if (!(items.get(pos) instanceof NativeAd)) {
searchClickListener.requestAds(pos);
}
}
}
if (!isLoading && NetworkUtil.hasConnection(App.getContext())) {
if (totalItemCount <= (lastVisibleItem + visibleThreshold)) {
if (items.size() > 1 && mOnLoadMoreListener != null) {
mOnLoadMoreListener.onLoadMore();
}
isLoading = true;
}
}
}
});
}
public void setMoreAdapter(List<Search> data) {
items.addAll(data);
//items.addAll((items.size()-1),data);
this.notifyDataSetChanged();
}
public void setAdapter(List<Search> data) {
items = new ArrayList<>();
items.addAll(data);
this.notifyDataSetChanged();
}
#Override
public int getItemCount() {
return items != null ? items.size() : 0;
}
#Override
public int getItemViewType(int position) {
if(items.get(position) instanceof NativeAd)return VIEW_TYPE_AD;
if(items.get(position)==null && position == (items.size()-1)){
return VIEW_TYPE_LOADING;
}else{
return VIEW_TYPE_MEDIA;
}
}
public void setLoader() {
items.add(null);
this.notifyItemInserted(items.size() - 1);
}
public void setAd(NativeAd ad, int pos) {
items.add(pos, ad);
this.notifyItemInserted(pos);
}
public void removeLoader() {
items.remove(items.size() - 1);
this.notifyItemRemoved(items.size());
}
public void setOnLoadMoreListener(LoadMoreListener mOnLoadMoreListener) {
this.mOnLoadMoreListener = mOnLoadMoreListener;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
RecyclerView.ViewHolder viewHolder = null;
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
switch (i) {
case VIEW_TYPE_MEDIA:
View v = inflater.inflate(R.layout.search_list, viewGroup, false);
viewHolder = new SearchViewHolder(v,searchClickListener);
viewHolder.itemView.setClickable(true);
break;
case VIEW_TYPE_LOADING:
View vL = inflater.inflate(R.layout.loader, viewGroup, false);
viewHolder = new LoadingViewHolder(vL);
break;
case VIEW_TYPE_AD:
View ads = inflater.inflate(R.layout.ad_item_small, viewGroup, false);
viewHolder = new AdsViewHolder(ads);
break;
}
return viewHolder;
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int i) {
lastItemPosition = i;
switch (holder.getItemViewType()) {
case VIEW_TYPE_LOADING:
LoadingViewHolder loadingViewHolder = (LoadingViewHolder) holder;
loadingViewHolder.progressBar.start();
break;
case VIEW_TYPE_MEDIA:
final SearchViewHolder viewHolder = (SearchViewHolder) holder;
final Search ci = (Search)items.get(i);
viewHolder.bindTo(ci);
break;
case VIEW_TYPE_AD:
final AdsViewHolder adsViewHolder = (AdsViewHolder) holder;
NativeAd nativeAd = (NativeAd)items.get(i);
adsViewHolder.bind(nativeAd);
break;
}
}
private static class LoadingViewHolder extends RecyclerView.ViewHolder {
private RotateLoading progressBar;
private LoadingViewHolder(View itemView) {
super(itemView);
progressBar = itemView.findViewById(R.id.rotateloading);
}
}
public void setLoaded() {
isLoading = false;
}
public interface SearchClickListener {
void onClick(Search search);
void requestAds(int position);
}
}
Seriously any help will be greatly appreciated.

Due to the character limit, I'm posting my viewHolder code here as a comment.
ArticleViewHolder:
public class ArticleViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, LocalMessageCallback {
private Articles articles;
private TextView title,interest,time,source,content;
private LinearLayout revealView;
private ImageView thumbnail,pin,source_link;
private Animation alphaAnimation;
private float pixelDensity;
private boolean flag = false;
private RelativeLayout revealLayout,layoutButtons;
private ArticleListener articleListener;
private CardView cardView;
private String pin_action = "add";
public ArticleViewHolder(View view, ArticleListener articleListener) {
super(view);
this.articleListener = articleListener;
pixelDensity = App.getContext().getResources().getDisplayMetrics().density;
alphaAnimation = AnimationUtils.loadAnimation(App.getContext(), R.anim.alpha_anim);
LocalMessageManager.getInstance().addListener(this);
FrameLayout source_holder = view.findViewById(R.id.source_holder);
cardView = view.findViewById(R.id.card_view);
source_link = view.findViewById(R.id.source_link);
revealLayout = view.findViewById(R.id.revealLayout);
revealView = view.findViewById(R.id.revealView);
layoutButtons = view.findViewById(R.id.layoutButtons);
title = view.findViewById(R.id.title);
content = view.findViewById(R.id.content);
interest = view.findViewById(R.id.interest);
thumbnail = view.findViewById(R.id.thumbnail);
time = view.findViewById(R.id.time);
source = view.findViewById(R.id.source);
ImageView reveal = view.findViewById(R.id.reveal);
ImageView close = view.findViewById(R.id.close);
pin = view.findViewById(R.id.pin);
ImageView share = view.findViewById(R.id.share);
reveal.setOnClickListener(this);
close.setOnClickListener(this);
pin.setOnClickListener(this);
share.setOnClickListener(this);
title.setOnClickListener(this);
content.setOnClickListener(this);
thumbnail.setOnClickListener(this);
source_holder.setOnClickListener(this);
}
public void bindTo(Articles articles) {
this.articles = articles;
title.setText(articles.getTitle());
content.setText(articles.getContent().replace("\n", " ").replace("\r", " "));
interest.setText(articles.getInterest());
//Log.e("thumbnail",String.valueOf(articles.getThumbnail()));
if(SharedPrefernces.get_feed_images_show()) {
thumbnail.setVisibility(View.VISIBLE);
ImageLoader.loadImage(thumbnail, articles.getThumbnail());
}else{
thumbnail.setVisibility(View.GONE);
}
time.setText(TimUtil.timeAgo(articles.getTimeStamp()));
String _source = articles.getSource();
source.setText(_source.substring(0,1).toUpperCase() + _source.substring(1).toLowerCase());
if(articleListener.IsPinned(articles)){
set_pin_view(true);
pin_action = App.getContext().getResources().getString(R.string.remove_pin);
}else{
set_pin_view(false);
pin_action = App.getContext().getResources().getString(R.string.add_pin);
}
if(flag){
revealView.setVisibility(View.VISIBLE);
layoutButtons.setVisibility(View.VISIBLE);
}else{
revealView.setVisibility(View.GONE);
layoutButtons.setVisibility(View.GONE);
}
if(articleListener.isSingleFeedsActivity()){
source_link.setVisibility(View.GONE);
}else{
source_link.setVisibility(View.VISIBLE);
}
if(!SharedPrefernces.getUseNightMode()){
cardView.setCardBackgroundColor(App.getContext().getResources().getColor(R.color.material_grey_100));
}
}
private void set_pin_view(boolean isPinned){
Drawable mDrawable;
if(!isPinned){
mDrawable = ContextCompat.getDrawable(App.getContext(),R.drawable.pin_outline);
mDrawable.setColorFilter(new
PorterDuffColorFilter(App.getContext().getResources().getColor(R.color.material_grey_200), PorterDuff.Mode.SRC_IN));
}else{
mDrawable = ContextCompat.getDrawable(App.getContext(),R.drawable.pin_outline);
mDrawable.setColorFilter(new
PorterDuffColorFilter(App.getContext().getResources().getColor(R.color.colorAccent), PorterDuff.Mode.SRC_IN));
}
pin.setImageDrawable(mDrawable);
}
#Override
public void onClick(View view) {
LocalMessageManager.getInstance().send(R.id.hide_reveal_layout,articles.getId());
if (articleListener != null) {
if(view.getId() == R.id.reveal || view.getId() == R.id.close){
revealLayout();
}else if(view.getId() == R.id.source_holder){
articleListener.loadSingleFeedsActivity(articles);
}else if(view.getId() == R.id.pin){
articleListener.OnPinClick(articles,pin_action);
if(pin_action.equalsIgnoreCase(App.getContext().getResources().getString(R.string.add_pin))){
pin_action = App.getContext().getResources().getString(R.string.remove_pin);
set_pin_view(true);
}else{
pin_action = App.getContext().getResources().getString(R.string.add_pin);
set_pin_view(false);
}
revealLayout();
}else if(view.getId() == R.id.share){
articleListener.OnShareClick(articles);
revealLayout();
}else if(view.getId() == R.id.title || view.getId() == R.id.thumbnail|| view.getId() == R.id.content) {
articleListener.OnItemClick(articles);
}
}
}
private void revealLayout() {
/*
MARGIN_RIGHT = 16;
FAB_BUTTON_RADIUS = 28;
*/
boolean isAttachedToWindow = ViewCompat.isAttachedToWindow(revealView);
if (isAttachedToWindow) {
int x = revealLayout.getRight();
int y = revealLayout.getBottom();
x -= ((28 * pixelDensity) + (16 * pixelDensity));
int hypotenuse = (int) Math.hypot(revealLayout.getWidth(), revealLayout.getHeight());
if (!flag) {
RelativeLayout.LayoutParams parameters = (RelativeLayout.LayoutParams)
revealView.getLayoutParams();
parameters.height = revealLayout.getHeight();
revealView.setLayoutParams(parameters);
Animator anim = ViewAnimationUtils.createCircularReveal(revealView, x, y, 0, hypotenuse);
anim.setDuration(200);
anim.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animator) {
}
#Override
public void onAnimationEnd(Animator animator) {
layoutButtons.setVisibility(View.VISIBLE);
layoutButtons.startAnimation(alphaAnimation);
}
#Override
public void onAnimationCancel(Animator animator) {
}
#Override
public void onAnimationRepeat(Animator animator) {
}
});
revealView.setVisibility(View.VISIBLE);
anim.start();
flag = true;
} else {
Animator anim = ViewAnimationUtils.createCircularReveal(revealView, x, y, hypotenuse, 0);
anim.setDuration(200);
anim.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animator) {
}
#Override
public void onAnimationEnd(Animator animator) {
revealView.setVisibility(View.GONE);
layoutButtons.setVisibility(View.GONE);
}
#Override
public void onAnimationCancel(Animator animator) {
}
#Override
public void onAnimationRepeat(Animator animator) {
}
});
anim.start();
flag = false;
}
}
}
#Override
public void handleMessage(#NonNull LocalMessage localMessage) {
switch (localMessage.getId()){
case R.id.hide_reveal_layout:
int id = localMessage.getArg1();
if(flag && id != articles.getId()){
revealLayout();
}
break;
case R.id.recyclerview_scroll:
if(flag){
revealLayout();
}
break;
}
}
}

add filter on barcode image before scanning via zxing library

i'm using zxing library for detecting barcodes.
in some images zxing cant detect barcode like this:
but when the sharpen filter add on image with photoshop the zxing detect barcode as well. like this:
can i add any filter on image before zxing detection level?
here is my code:
public class ScanFragment2 extends Fragment {
private ViewGroup contentFrame;
private ZXingScannerView zXingScannerView;
private ArrayList<Integer> mSelectedIndices;
private int camId, frontCamId, rearCamId;
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initVar();
zXingScannerView = new ZXingScannerView(getActivity());
setupFormats();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_scan, container, false);
initView(rootView);
initListener();
return rootView;
}
private void initVar() {
camId = AppPreference.getInstance(getActivity()).getInteger(PrefKey.CAM_ID); // back camera by default
if (camId == -1) {
camId = rearCamId;
}
loadCams();
}
private void initView(View rootView) {
contentFrame = (ViewGroup) rootView.findViewById(R.id.content_frame);
}
private void initListener() {
zXingScannerView.setResultHandler(new ZXingScannerView.ResultHandler() {
#Override
public void handleResult(Result result) {
String resultStr = result.getText();
//this is my result: resultStr
zXingScannerView.resumeCameraPreview(this);
}
});
}
private void activateScanner() {
if (zXingScannerView != null) {
if (zXingScannerView.getParent() != null) {
((ViewGroup) zXingScannerView.getParent()).removeView(zXingScannerView); // to prevent crush on re adding view
}
contentFrame.addView(zXingScannerView);
if (zXingScannerView.isActivated()) {
zXingScannerView.stopCamera();
}
zXingScannerView.startCamera(camId);
}
}
public void setupFormats() {
List<BarcodeFormat> formats = new ArrayList<>();
if (mSelectedIndices == null || mSelectedIndices.isEmpty()) {
mSelectedIndices = new ArrayList<>();
for (int i = 0; i < ZXingScannerView.ALL_FORMATS.size(); i++) {
mSelectedIndices.add(i);
}
}
for (int index : mSelectedIndices) {
formats.add(ZXingScannerView.ALL_FORMATS.get(index));
}
if (zXingScannerView != null) {
zXingScannerView.setFormats(formats);
}
}
#Override
public void onResume() {
super.onResume();
activateScanner();
}
#Override
public void onPause() {
super.onPause();
if (zXingScannerView != null) {
zXingScannerView.stopCamera();
}
}
#Override
public void setMenuVisibility(final boolean visible) {
super.setMenuVisibility(visible);
if (zXingScannerView != null) {
zXingScannerView.setFlash(false);
}
}
private void toggleCamera() {
if (camId == rearCamId) {
camId = frontCamId;
} else {
camId = rearCamId;
}
AppPreference.getInstance(getActivity()).setInteger(PrefKey.CAM_ID, camId);
zXingScannerView.stopCamera();
zXingScannerView.startCamera(camId);
}
private void loadCams() {
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
frontCamId = i;
} else if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
rearCamId = i;
}
}
AppPreference.getInstance(getActivity()).setInteger(PrefKey.CAM_ID, rearCamId);
}
}
and the UI:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutDirection="ltr">
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>

Android: How should I pass a ListView between activities, when the Context object disallows Parcelable?

I'm creating an alarm clock application, and I'd like the homepage to have multiple Alarm objects shown, like the default Android clock application. To do this, I've been trying a ListView to create a button for each Alarm in an ArrayList of Alarms.
Debugging the crashes this caused, I've found that it can't implement Serializable or Parcelable due to the Context object within it, and thus I have no way to pass it from one activity to another. The ListView works fine when I create the alarms from the MainActivity itself, but when I use the CreateAlarmActivity that takes input from the user, the ListView won't pass through and it crashes.
I haven't found this precise problem on StackOverflow. This problem is close (Implementing Parcelable Class That Requires Context) but involves a database, which seems overkill for my needs.
If a ListView is even the best way to go about this, how should I pass the ListView between activities? If there's a better way, what would be a better implementation?
I apologise for the large amount of code. I'm not sure exactly what may prove relevant, so I've erred on the side of too much information rather than too little.
Code:
MainActivity.java:
public class MainActivity extends AppCompatActivity {
ListView alarmListView;
ArrayList<Alarm> alarmList = new ArrayList<Alarm>();
int[] testArray = {0, 0, 0, 0, 0, 0, 0};
Alarm testAlarm = new Alarm("testAlarm", 6, 1, true, testArray, 10);
Alarm testAlarm2 = new Alarm("testAlarm2", 6, 1, true, testArray, 10);
AlarmAdapter alarmAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
alarmListView = (ListView) findViewById(R.id.alarmListView);
alarmList.add(testAlarm);
alarmList.add(testAlarm2);
alarmAdapter = new AlarmAdapter(MainActivity.this, alarmList);
alarmListView.setAdapter(alarmAdapter);
alarmAdapter.notifyDataSetChanged();
}
// Create alarm when user presses FAB on activity_main.xml.
public void createNewAlarm(View view) {
Intent createAlarmIntent = new Intent(this, CreateAlarmActivity.class);
createAlarmIntent.putExtra("alarmList", alarmList);
createAlarmIntent.putExtra("alarmAdapter", alarmAdapter);
startActivity(createAlarmIntent);
}
public void testAlarmActivated(View view){
Intent activateAlarmIntent = new Intent(this, AlarmActivatedActivity.class);
startActivity(activateAlarmIntent);
}
}
AlarmAdapter.java:
public class AlarmAdapter extends BaseAdapter implements Parcelable {
private Context alarmContext;
private ArrayList<Alarm> alarmList;
public AlarmAdapter(Context context, ArrayList arrayList) {
super();
alarmContext = context;
alarmList = arrayList;
}
public int getCount() {
return alarmList.size();
}
// getView method is called for each item of ListView
public View getView(int position, View view, ViewGroup parent) {
// inflate the layout for each item of listView
LayoutInflater inflater = (LayoutInflater) alarmContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.alarm_row, parent, false);
// get the reference of textView and button
TextView alarmName = (TextView) view.findViewById(R.id.title);
// Button alarmButton = (Button) view.findViewById(R.id.alarmButton);
// Set the title and button name
Alarm tempAlarm = alarmList.get(position);
alarmName.setText(tempAlarm.name);
// btnAction.setText("Action " + position);
// Click listener of button
/*btnAction.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Logic goes here
}
});*/
return view;
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
protected AlarmAdapter(Parcel in) {
alarmContext = (Context) in.readValue(Context.class.getClassLoader());
if (in.readByte() == 0x01) {
alarmList = new ArrayList<Alarm>();
in.readList(alarmList, Alarm.class.getClassLoader());
} else {
alarmList = null;
}
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeValue(alarmContext);
if (alarmList == null) {
dest.writeByte((byte) (0x00));
} else {
dest.writeByte((byte) (0x01));
dest.writeList(alarmList);
}
}
#SuppressWarnings("unused")
public static final Parcelable.Creator<AlarmAdapter> CREATOR = new Parcelable.Creator<AlarmAdapter>() {
#Override
public AlarmAdapter createFromParcel(Parcel in) {
return new AlarmAdapter(in);
}
#Override
public AlarmAdapter[] newArray(int size) {
return new AlarmAdapter[size];
}
};
}
Alarm.java:
public class Alarm implements Serializable {
String name;
int hour;
int minute;
boolean isPm;
int[] daysActive;
int snoozeTimer;
public Alarm(String startName, int startHour, int startMinute,
Boolean startIsPm, int[] startDaysActive, int startSnoozeTimer){
name = startName;
hour = startHour;
minute = startMinute;
isPm = startIsPm;
daysActive = startDaysActive;
snoozeTimer = startSnoozeTimer;
}
}
CreateAlarmActivity.java:
public class CreateAlarmActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_alarm);
alarmList = (ArrayList<Alarm>)getIntent().getSerializableExtra("alarmList");
alarmAdapter = (AlarmAdapter)getIntent().getParcelableExtra("alarmAdapter)");
}
int alarmHour = 6;
int alarmMinute = 0;
boolean isPm = false;
int snoozeTimer = 10;
int [] daysActive = new int[] {0, 0, 0, 0, 0, 0, 0};
ArrayList<Alarm> alarmList = new ArrayList<Alarm>();
AlarmAdapter alarmAdapter;
// Add one to the hour of the alarm.
public void changeHour(View view) {
Button btn = findViewById(R.id.buttonHours);
if (alarmHour == 12){
alarmHour = 0;
}
else {
alarmHour++;
}
btn.setText(Integer.toString(alarmHour));
}
// Add one to the minute of the alarm.
public void changeMinute(View view) {
Button btn = findViewById(R.id.buttonMinutes);
if (alarmMinute == 59) {
alarmMinute = 0;
}
else {
alarmMinute++;
}
if (alarmMinute < 10) {
// Ensure minute 1 becomes 01, e.g, 6:01 am.
btn.setText("0" + Integer.toString(alarmMinute));
}
else {
btn.setText(Integer.toString(alarmMinute));
}
}
public void changeAmPm(View view) {
Button btn = findViewById(R.id.buttonAmPm);
if (isPm == true) {
isPm = false;
btn.setText("am");
}
else {
isPm = true;
btn.setText("pm");
}
}
public void changeSnoozeTimer(View view) {
Button btn = findViewById(R.id.buttonSnoozeTimer);
if (snoozeTimer == 15){
snoozeTimer = 1;
}
else {
snoozeTimer++;
}
btn.setText(Integer.toString(snoozeTimer));
}
public void finishAlarm(View view){
EditText alarmName = findViewById(R.id.alarmName);
String name = alarmName.getText().toString();
Alarm alarm = new Alarm(name, alarmHour, alarmMinute, isPm, daysActive, snoozeTimer);
alarmList.add(alarm);
alarmAdapter.notifyDataSetChanged();
Intent finishAlarmIntent = new Intent(this, MainActivity.class);
finishAlarmIntent.putExtra("alarmList", alarmList);
startActivity(finishAlarmIntent);
}
public void cancelAlarm(View view){
Intent cancelAlarmIntent = new Intent(this, MainActivity.class);
startActivity(cancelAlarmIntent);
}
public void changeSunday(View view) {
Button btn = findViewById(R.id.buttonSunday);
if (daysActive[0] == 0){
daysActive[0] = 1;
// Source: https://stackoverflow.com/questions/2173936/how-to-set-background-color-of-a-view
// Credit goes to EddieB for the below line.
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[1] = 0;
// Source: https://stackoverflow.com/questions/14802354/how-to-reset-a-buttons-background-color-to-default
// Credit goes to Ivo for the below line.
btn.getBackground().clearColorFilter();
}
}
public void changeMonday(View view) {
Button btn = findViewById(R.id.buttonMonday);
if (daysActive[1] == 0){
daysActive[1] = 1;
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[1] = 0;
btn.getBackground().clearColorFilter();
}
}
public void changeTuesday(View view) {
Button btn = findViewById(R.id.buttonTuesday);
if (daysActive[2] == 0){
daysActive[2] = 1;
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[2] = 0;
btn.getBackground().clearColorFilter();
}
}
public void changeWednesday(View view) {
Button btn = findViewById(R.id.buttonWednesday);
if (daysActive[3] == 0){
daysActive[3] = 1;
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[3] = 0;
btn.getBackground().clearColorFilter();
}
}
public void changeThursday(View view) {
Button btn = findViewById(R.id.buttonThursday);
if (daysActive[4] == 0){
daysActive[4] = 1;
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[4] = 0;
btn.getBackground().clearColorFilter();
}
}
public void changeFriday(View view) {
Button btn = findViewById(R.id.buttonFriday);
if (daysActive[5] == 0){
daysActive[5] = 1;
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[5] = 0;
btn.getBackground().clearColorFilter();
}
}
public void changeSaturday(View view) {
Button btn = findViewById(R.id.buttonSaturday);
if (daysActive[6] == 0){
daysActive[6] = 1;
btn.getBackground().setColorFilter(Color.parseColor("#00ff00"), PorterDuff.Mode.DARKEN);
}
else {
daysActive[6] = 0;
btn.getBackground().clearColorFilter();
}
}
}

I create a RecyclerView in Fragment but while reloading data RecyclerView does not maintains state.

//I have created RecycleView in Fragment as follows:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_new_shop, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
stackView = (RelativeLayout) view.findViewById(R.id.stack_view);
firstStack = (CustomImageView) view.findViewById(R.id.firstStack);
secondStack = (CustomImageView) view.findViewById(R.id.secondStack);
thirdStack = (CustomImageView) view.findViewById(R.id.thirdStack);
stackTopGap = view.findViewById(R.id.view);
new Handler().post(new Runnable() {
#Override
public void run() {
firstStack.getLayoutParams().width = stackView.getWidth() - 40;
secondStack.getLayoutParams().width = stackView.getWidth() - 80;
thirdStack.getLayoutParams().width = stackView.getWidth() - 120;
width = thirdStack.getLayoutParams().width;
recyclerView.getLayoutParams().height = recyclerView.getHeight() - (firstStack.getHeight() + stackTopGap.getHeight());
stackView.getLayoutParams().height = firstStack.getHeight();
}
});
recyclerView.setHasFixedSize(true);
linearLayoutManager=new LinearLayoutManager(getActivity()) {
#Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
// A good idea would be to create this instance in some initialization method, and just set the target position in this method.
LinearSmoothScroller smoothScroller = new LinearSmoothScroller(getContext()) {
#Override
public PointF computeScrollVectorForPosition(int targetPosition) {
//int yDelta = calculateCurrentDistanceToPosition(targetPosition);
return new PointF(0, 200);
}
// This is the important method. This code will return the amount of time it takes to scroll 1 pixel.
// This code will request X milliseconds for every Y DP units.
#Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return 7 / TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 7, displayMetrics);
}
};
smoothScroller.setTargetPosition(position);
startSmoothScroll(smoothScroller);
}
};
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
}
#Override
public void onScrolled(final RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
final int positionView = ((LinearLayoutManager) recyclerView.getLayoutManager()).findLastVisibleItemPosition();
if (dy > 0) {
if (positionView >= 2) {
final View view = recyclerView.getChildAt(2);
if (view != null && recyclerView.getChildAdapterPosition(view) == positionView) {
TranslateAnimation translateAnimation = new TranslateAnimation(0, 0, 200, 0);
translateAnimation.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
if (counter == 0) {
if (recyclerView.getAdapter().getItemCount() - 4 >= positionView) {
createStackImageView();
}
if (stackView.getChildAt(1) != null) {
//stackView.getChildAt(1).setScaleX(1.5f);
}
counter++;
}
recyclerView.smoothScrollToPosition(positionView);
}
#Override
public void onAnimationEnd(Animation animation) {
view.clearAnimation();
stackView.requestLayout();
stackView.removeView(stackView.getChildAt(1));
stackView.invalidate();
try {
for (int i = 1; i < 4; i++) {
Glide.with(getActivity())
.load(JSONUrl.IMAGE_BASE_URL + imageList.get(positionView + i))
.into((ImageView) stackView.getChildAt(i));
}
} catch (IndexOutOfBoundsException | NullPointerException | IllegalArgumentException ex) {
ex.printStackTrace();
}
counter = 0;
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
translateAnimation.setDuration(150);
view.setAnimation(translateAnimation);
}
}
for (int i = stackView.getChildCount() - 1; i >= 2; i--) {
ResizeAnimation resizeAnimation = new ResizeAnimation(stackView.getChildAt(i));
resizeAnimation.setHeights(stackView.getChildAt(i).getHeight(), stackView.getChildAt(i - 1).getHeight());
resizeAnimation.setWidths(stackView.getChildAt(i).getWidth(), stackView.getChildAt(i - 1).getWidth());
resizeAnimation.setDuration(200);
stackView.getChildAt(i).startAnimation(resizeAnimation);
}
} else if (dy < 0) {
final int position = ((LinearLayoutManager) recyclerView.getLayoutManager()).findLastVisibleItemPosition();
if (position == imageList.size() - 1) {
stackView.removeView(firstStack);
stackView.addView(firstStack);
stackView.invalidate();
stackView.requestLayout();
stackView.getChildAt(1).setVisibility(View.VISIBLE);
Glide.with(getActivity())
.load(JSONUrl.IMAGE_BASE_URL + imageList.get(imageList.size() - 1))
.into((ImageView) stackView.getChildAt(1));
} else if (position == imageList.size() - 2) {
stackView.removeView(secondStack);
stackView.addView(secondStack);
secondStack.getLayoutParams().height = firstStack.getHeight() - 20;
secondStack.getLayoutParams().width = firstStack.getWidth() - 40;
stackView.invalidate();
stackView.requestLayout();
stackView.getChildAt(2).setVisibility(View.VISIBLE);
Glide.with(getActivity())
.load(JSONUrl.IMAGE_BASE_URL + imageList.get(imageList.size() - 2))
.into((ImageView) stackView.getChildAt(2));
} else if (position == imageList.size() - 3) {
stackView.removeView(thirdStack);
stackView.addView(thirdStack);
thirdStack.getLayoutParams().height = secondStack.getHeight() - 20;
thirdStack.getLayoutParams().width = secondStack.getWidth() - 40;
stackView.invalidate();
stackView.requestLayout();
stackView.getChildAt(3).setVisibility(View.VISIBLE);
Glide.with(getActivity())
.load(JSONUrl.IMAGE_BASE_URL + imageList.get(imageList.size() - 3))
.into((ImageView) stackView.getChildAt(3));
} else {
stackView.removeView(firstStack);
stackView.addView(firstStack);
stackView.invalidate();
stackView.requestLayout();
}
}
}
});
return view;
}
//In validateToken method data is taken from the json and set to adapter as follows.
private void validateToken() {
final SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
if (new ConnectionManager(getActivity()).isConnectedToInternet()) {
final SweetAlertDialog pDialog = new AlertDIalogMessage().showProgressDialog(getActivity(), "Loading...");
if (sharedPreferences.getString(SharedPrefrenceInfo.IS_TOKEN_VALID, "token_invalid").equals("token_invalid")) {
Utils.setTokenInfo(getActivity(), pDialog, new AccessTokenInfoHolder() {
#Override
public void setAcessTokenInfo(String accessToken, String expires_in, String token_type) {
Log.e("Access Token", accessToken);
new ShopFragmentJson(getActivity()).getShopPageContent(pDialog, sharedPreferences.getString(SharedPrefrenceInfo.TOKEN_TYPE, "") + " " + sharedPreferences.getString(SharedPrefrenceInfo.IS_TOKEN_VALID, ""), new ShopPageContentHolder() {
#Override
public void setErrorShopPageContent(String statusCode, String statusText) {
//do nothing here since the case unauthorized will not arrive for the first time
}
#Override
public void setSuccessShopPageContent(String success, String data) {
if (success.equals("true")) {
shoppageInfoList = getShopPageContent(data);
//set the adapter after loading data from url
final NewShopFragmentAdapter recyclerViewAdapter = new NewShopFragmentAdapter(getActivity(), recyclerView.getHeight(), shoppageInfoList);
recyclerView.setAdapter(recyclerViewAdapter);
pDialog.dismiss();
} else {
pDialog.dismiss();
new AlertDIalogMessage().showErrorDialog(getActivity(), data);
}
}
});
}
});
} else {
new ShopFragmentJson(getActivity()).getShopPageContent(pDialog, sharedPreferences.getString(SharedPrefrenceInfo.TOKEN_TYPE, "") + " " + sharedPreferences.getString(SharedPrefrenceInfo.IS_TOKEN_VALID, ""), new ShopPageContentHolder() {
#Override
public void setErrorShopPageContent(String statusCode, String statusText) {
//this method is invoked when unauthorized response come from server
Utils.setTokenInfo(getActivity(), pDialog, new AccessTokenInfoHolder() {
#Override
public void setAcessTokenInfo(String accessToken, String expires_in, String token_type) {
new ShopFragmentJson(getActivity()).getShopPageContent(pDialog, sharedPreferences.getString(SharedPrefrenceInfo.TOKEN_TYPE, "") + " " + sharedPreferences.getString(SharedPrefrenceInfo.IS_TOKEN_VALID, ""), new ShopPageContentHolder() {
#Override
public void setErrorShopPageContent(String statusCode, String statusText) {
//do nothing here since the case unauthorized will not arrive for the first time
}
#Override
public void setSuccessShopPageContent(String success, String data) {
if (success.equals("true")) {
List<ShoppageInfo> shoppageInfoList = getShopPageContent(data);
final NewShopFragmentAdapter recyclerViewAdapter = new NewShopFragmentAdapter(getActivity(), recyclerView.getHeight(), shoppageInfoList);
recyclerView.setAdapter(recyclerViewAdapter);
pDialog.dismiss();
} else {
pDialog.dismiss();
new AlertDIalogMessage().showErrorDialog(getActivity(), data);
}
}
});
}
});
}
#Override
public void setSuccessShopPageContent(String success, String data) {
if (success.equals("true")) {
List<ShoppageInfo> shoppageInfoList = getShopPageContent(data);
//set the adapter after loading data from url
final NewShopFragmentAdapter recyclerViewAdapter = new NewShopFragmentAdapter(getActivity(), recyclerView.getHeight(), shoppageInfoList);
recyclerView.setAdapter(recyclerViewAdapter);
pDialog.dismiss();
} else {
pDialog.dismiss();
new AlertDIalogMessage().showErrorDialog(getActivity(), data);
}
}
});
}
} else {
new SweetAlertDialog(getActivity(), SweetAlertDialog.ERROR_TYPE)
.setTitleText("Oops...")
.setContentText("No internet connection!")
.show();
}
}
No in onResume method i called validate token as follows:
#Override
public void onResume() {
super.onResume();
validateToken();
}
//Now when I call some activity from this fragment and come back with back pressed validate method is called and RecyclerView adapter is reloaded. Now what I want is to maintain the state of RecyclerView such that when I came back from activity RecyclerView stays in the scroll position from when activity is called. But problem for me is it always come from the start. I also see some Stack Overflow post and they suggest me to use Parceable but i don't get any benefit. Is is doing nothing.

Can try this.
You need to maintain an identifier for each row. Then save the first visible row's identifier before you go to the activity. Then when you come back you select that particular row again.

Two-Dimensional Array with JSON data - Data is downloaded, but I can't access it (?)

So, I am creating a little trivia game for learning purposes, but I ran into a problem.
First, I had a specific Android Fragment obtaining the data from JSON, and I will simply use that data on the callback method and display it on TextViews and Buttons. Everything was working fine, however, every time I returned to that fragment, the same questions would be there. So I decided to handle that in a better way outside of the callback method.
The problem here is that apparently my Arrays are either null or their lengths is zero. Which is weird, because according to my LOG, data is being passed to those arrays on the callback method.
Here's my full fragment code. Thanks!
public class GameFragment extends Fragment {
private TextView txtQuestion;
private Button btnAnswer1;
private Button btnAnswer2;
private Button btnAnswer3;
private Button btnAnswer4;
private Questions[] gameQuestions;
private Questions[] animeQuestions;
private Questions[] techQuestions;
private Questions[] movieQuestions;
private Questions[][] gameCategories = new Questions[4][];
int correctAnswer = -1;
private TransparentProgressDialog progressBar;
private Handler handler;
private Runnable runnable;
Callback cb = new Callback<MyApiData>(){
#Override
public void success(MyApiData myApiData, Response response) {
gameCategories[0] = new Questions[myApiData.getCategory()[0].getQuestions(0).length];
gameCategories[1] = new Questions[myApiData.getCategory()[1].getQuestions(1).length];
gameCategories[2] = new Questions[myApiData.getCategory()[2].getQuestions(2).length];
gameCategories[3] = new Questions[myApiData.getCategory()[3].getQuestions(3).length];
//gameCategories = new Questions[][] {gameQuestions, animeQuestions, techQuestions, movieQuestions};
for(int i = 0; i < 4 ; i++){
for(int j = 0; j < gameCategories[i].length ; j++){
gameCategories[i][j] = myApiData.getCategory()[i].getQuestions(i)[j];
//Log.d("GameFragment", "gameCategories[i][j] - gameCategories["+i+"]["+j+"]: " + gameCategories[i][j].getQuestion());
}
}
//displayQuestion();
progressBar.dismiss();
displayQuestion();
}
#Override
public void failure(RetrofitError error) {
Log.d("GameScreen", "Callback failed!");
}
};
public GameFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_game, container, false);
txtQuestion = (TextView) view.findViewById(R.id.txtQuestion);
btnAnswer1 = (Button) view.findViewById(R.id.btnAnswer1);
btnAnswer2 = (Button) view.findViewById(R.id.btnAnswer2);
btnAnswer3 = (Button) view.findViewById(R.id.btnAnswer3);
btnAnswer4 = (Button) view.findViewById(R.id.btnAnswer4);
btnAnswer1.setOnClickListener(new View.OnClickListener() {
#Override public void onClick(View view) { checkAnswer(view); } });
btnAnswer2.setOnClickListener(new View.OnClickListener() {
#Override public void onClick(View view) { checkAnswer(view); } });
btnAnswer3.setOnClickListener(new View.OnClickListener() {
#Override public void onClick(View view) { checkAnswer(view); } });
btnAnswer4.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
checkAnswer(view);
}
});
handler = new Handler();
progressBar = new TransparentProgressDialog(getActivity(), R.drawable.loading_spinner);
runnable = new Runnable() {
#Override
public void run() {
if (progressBar.isShowing()) {
progressBar.dismiss();
}
}
};
//launchRingDialog();
//RestClient.get().getQuestions(cb);
// Inflate the layout for this fragment
return view;
}
public void launchRingDialog() {
new Thread(new Runnable() {
public void run(){
try {
Log.d("Thred", "Try");
progressBar.show();
RestClient.get().getQuestions(cb);
//Thread.sleep(10000);
} catch (Exception e) {
}
//progressBar.dismiss();
}
}).start();
}
public void checkAnswer(View v){
switch(v.getId()){
case R.id.btnAnswer1:
if(correctAnswer == 1){
feedback(true, btnAnswer1);
}else {
feedback(false, btnAnswer1);
}
break;
case R.id.btnAnswer2:
if(correctAnswer == 2){
feedback(true, btnAnswer2);
}else {
feedback(false, btnAnswer2);
}
break;
case R.id.btnAnswer3:
if(correctAnswer == 3){
feedback(true, btnAnswer3);
}else {
feedback(false, btnAnswer3);
}
break;
case R.id.btnAnswer4:
if(correctAnswer == 4){
feedback(true, btnAnswer4);
}else {
feedback(false, btnAnswer4);
}
break;
default: txtQuestion.setText("Error");
break;
}
}
public void feedback(Boolean correct, Button btn){
if(correct){
btn.setBackgroundColor(Color.GREEN);
btn.setText("CORRECT!");
}else{
btn.setBackgroundColor(Color.RED);
btn.setText("WRONG!");
}
}
#Override
public void onResume() {
super.onResume();
//displayQuestion();
}
public void displayQuestion(){
Random randomizer = new Random();
int randomQuestion;
int category = GTMain.choosenCategory;
if(category == 5){
category = randomizer.nextInt(4);
}
randomQuestion = randomizer.nextInt(25);
Log.d("displayQuestion", "Before if statements");
if(gameCategories != null && gameCategories.length != 0) {
Log.d("displayQuestion", "First if");
if(gameCategories[category] != null && gameCategories[category].length != 0){
Log.d("displayQuestion", "Second if");
txtQuestion.setText(gameCategories[category][randomQuestion].getQuestion());
correctAnswer = gameCategories[category][randomQuestion].getCorrectAnswer();
Log.d("displayQuestion()", "correctAnswer: " + correctAnswer);
btnAnswer1.setText(gameCategories[category][randomQuestion].getAnswers().getA1());
btnAnswer2.setText(gameCategories[category][randomQuestion].getAnswers().getA2());
btnAnswer3.setText(gameCategories[category][randomQuestion].getAnswers().getA3());
btnAnswer4.setText(gameCategories[category][randomQuestion].getAnswers().getA4());
}
}
}
}
PS: On my main activity, I check to see which fragment should be loaded. If it's the fragment that contains the components to display the questions and answer (the one from the code above), I call the following method: gameFragment.launchRingDialog(); (and yes, I have created an instance of my GameFragment fragment before calling that method!)

When onResume() is called, your RestClient.get().getQuestions(cb) is still running in background, and your call displayQuestion(), so of course nothing is shown.
Can you put displayQuestion() inside success() of your callback?
Callback cb = new Callback<MyApiData>(){
#Override
public void success(MyApiData myApiData, Response response) {
....
for(int i = 0; i < 4 ; i++){
for(int j = 0; j < gameCategories[i].length ; j++){
...
}
}
displayQuestion();
}
....
};
I would also suggest you to remove displayQuestion() in onResume() method.