Попытка получить данные и поместить их в RecyclerView. Но я всегда получаю ошибку нулевого адаптера. Адаптер моего списка не распознается.
Я инициализировал адаптер и recyclerview в OnCreate (), OnViewCreated () ничего не изменилось, кроме app-cra sh.
Вы можете пролить свет, пожалуйста?
Адаптер My List:
public class PostListAdapter extends RecyclerView.Adapter<PostListAdapter.ViewHolder>{
private static final String TAG = "PostListAdapter";
private static final int NUM_GRID_COLUMNS = 3;
private ArrayList<Post> mPosts;
private Context mContext;
public class ViewHolder extends RecyclerView.ViewHolder{
SquareImageView mPostImage;
public ViewHolder(View itemView) {
super(itemView);
mPostImage = (SquareImageView) itemView.findViewById(R.id.post_image);
int gridWidth = mContext.getResources().getDisplayMetrics().widthPixels;
int imageWidth = gridWidth/NUM_GRID_COLUMNS;
mPostImage.setMaxHeight(imageWidth);
mPostImage.setMaxWidth(imageWidth);
}
}
ImageLoaderConfiguration.Builder config = new ImageLoaderConfiguration.Builder(mContext);
public PostListAdapter(Context context, ArrayList<Post> posts) {
mPosts = posts;
mContext = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.layout_view_post, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(mContext));
UniversalImageLoader.setImage(mPosts.get(position).getImage(), holder.mPostImage);
//GlideApp.with(mContext).load(mPosts.get(position)).into(holder.mPostImage);
//imageLoader.displayImage(mPosts.get(position).getImage(), holder.mPostImage);
final int pos = position;
holder.mPostImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: selected a post");
//TODO
//view the post in more detail
}
});
}
@Override
public int getItemCount() {
return mPosts.size();
}
}
My Fragment (где я инициализирую адаптер и recyclerview):
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_search, container, false);
mFilters = view.findViewById(R.id.ic_search);
mSearchText = view.findViewById(R.id.input_search);
mRecyclerView = view.findViewById(R.id.recyclerView);
mFrameLayout = view.findViewById(R.id.container);
getElasticSearchPassword();
init();
return view;
}
private void setupPostsList(){
RecyclerViewMargin itemDecorator = new RecyclerViewMargin(GRID_ITEM_MARGIN, NUM_GRID_COLUMNS);
mRecyclerView.addItemDecoration(itemDecorator);
GridLayoutManager gridLayoutManager = new GridLayoutManager(getActivity(), NUM_GRID_COLUMNS);
mRecyclerView.setLayoutManager(gridLayoutManager);
mAdapter = new PostListAdapter(getActivity(), mPosts);
mRecyclerView.setAdapter(mAdapter);
}
private void init(){
mFilters.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: navigating to filters activity.");
Intent intent = new Intent(getActivity(), FiltersActivity.class);
startActivity(intent);
}
});
mSearchText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if(actionId == EditorInfo.IME_ACTION_SEARCH
||actionId == EditorInfo.IME_ACTION_DONE
|| event.getAction() == KeyEvent.ACTION_DOWN
|| event.getKeyCode() == KeyEvent.KEYCODE_ENTER){
mPosts = new ArrayList<Post>();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
ElasticSearchAPI searchAPI = retrofit.create(ElasticSearchAPI.class);
HashMap<String, String> headerMap = new HashMap<String, String>();
headerMap.put("Authorization", Credentials.basic("", mElasticSearchPassword));
String searchString = "";
if(!mSearchText.equals("")){
searchString = searchString + mSearchText.getText().toString() + "*";
}
if(!mPrefCity.equals("")){
searchString = searchString + " city:" + mPrefCity;
}
if(!mPrefStateProv.equals("")){
searchString = searchString + " state_province:" + mPrefStateProv;
}
if(!mPrefCountry.equals("")){
searchString = searchString + " country:" + mPrefCountry;
}
Call<HitsObject> call = searchAPI.search(headerMap, "AND", searchString);
call.enqueue(new Callback<HitsObject>() {
@Override
public void onResponse(Call<HitsObject> call, Response<HitsObject> response) {
HitsList hitsList = new HitsList();
String jsonResponse = "";
try{
Log.d(TAG, "onResponse: server response: " + response.toString());
if(response.isSuccessful()){
hitsList = response.body().getHits();
}else{
jsonResponse = response.errorBody().string();
}
Log.d(TAG, "onResponse: hits: " + hitsList);
for(int i = 0; i < hitsList.getPostIndex().size(); i++){
Log.d(TAG, "onResponse: data: " + hitsList.getPostIndex().get(i).getPost().toString());
mPosts.add(hitsList.getPostIndex().get(i).getPost());
}
Log.d(TAG, "onResponse: size: " + mPosts.size());
//setup the list of posts
setupPostsList();
}catch (NullPointerException e){
Log.e(TAG, "onResponse: NullPointerException: " + e.getMessage() );
}
catch (IndexOutOfBoundsException e){
Log.e(TAG, "onResponse: IndexOutOfBoundsException: " + e.getMessage() );
}
catch (IOException e){
Log.e(TAG, "onResponse: IOException: " + e.getMessage() );
}
}
@Override
public void onFailure(Call<HitsObject> call, Throwable t) {
Log.e(TAG, "onFailure: " + t.getMessage() );
Toast.makeText(getActivity(), "search failed", Toast.LENGTH_SHORT).show();
}
});
}
return false;
}
});
}
public void viewPost(String postId){
ViewPostFragment fragment = new ViewPostFragment();
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
Bundle args = new Bundle();
args.putString(getString(R.string.arg_post_id), postId);
fragment.setArguments(args);
transaction.replace(R.id.container, fragment, getString(R.string.fragment_view_post));
transaction.addToBackStack(getString(R.string.fragment_view_post));
transaction.commit();
mFrameLayout.setVisibility(View.VISIBLE);
ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(getActivity()));
}
@Override
public void onResume() {
super.onResume();
getFilters();
}
private void getElasticSearchPassword(){
Log.d(TAG, "getElasticSearchPassword: retrieving elasticsearch password.");
Query query = FirebaseDatabase.getInstance().getReference()
.child(getString(R.string.node_elasticsearch))
.orderByValue();
query.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
DataSnapshot singleSnapshot = dataSnapshot.getChildren().iterator().next();
mElasticSearchPassword = singleSnapshot.getValue().toString();
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void getFilters(){
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
mPrefCity = preferences.getString(getString(R.string.preferences_city), "");
mPrefStateProv = preferences.getString(getString(R.string.preferences_state_province), "");
mPrefCountry = preferences.getString(getString(R.string.preferences_country), "");
Log.d(TAG, "getFilters: got filters: \ncity: " + mPrefCity + "\nState/Prov: " + mPrefStateProv
+ "\nCountry: " + mPrefCountry);
}
}