Это приложение, которое извлекает данные из базы данных firebase, я хочу знать, как извлечь определенные данные c в новое действие. Как, например, получить указанные c данные книги по нажатию RecyclerView. Я могу получить позицию onclick в RecyclerView, но я не знаю, как использовать это с firebase
Вот мой код:
public class SearchPage extends AppCompatActivity {
EditText searchbar;
RecyclerView recyclerView;
DatabaseReference reference;
ArrayList <String> BookNameList;
ArrayList <String> AuthorNameList;
ArrayList <String> PicList;
ArrayList <String> PublisherList;
ArrayList <String> Shelfnols;
ArrayList <String> Desc;
SearchAdapter searchAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_page);
searchbar = (EditText) findViewById(R.id.searchbar);
reference = FirebaseDatabase.getInstance().getReference();
reference.keepSynced(true);
recyclerView = (RecyclerView) findViewById(R.id.rv);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
BookNameList = new ArrayList <> ();
PublisherList = new ArrayList <> ();
AuthorNameList = new ArrayList <> ();
Shelfnols = new ArrayList <> ();
PicList = new ArrayList <> ();
Desc = new ArrayList <> ();
final ArrayList <String> uidlist = new ArrayList <String> ();
searchbar.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
if (!s.toString().isEmpty()) {
setAdapter(s.toString());
} else {
BookNameList.clear();
AuthorNameList.clear();
PicList.clear();
PublisherList.clear();
Shelfnols.clear();
Desc.clear();
uidlist.clear();
}
}
private void setAdapter(final String searchedString) {
reference.child("books").addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
BookNameList.clear();
AuthorNameList.clear();
PicList.clear();
PublisherList.clear();
Shelfnols.clear();
Desc.clear();
uidlist.clear();
int counter = 0;
for (DataSnapshot snapshot: dataSnapshot.getChildren()) {
String uid = snapshot.getKey();
String desc = snapshot.child("Desc").getValue(String.class);
String bookname = snapshot.child("bookname").getValue(String.class);
String author = snapshot.child("author").getValue(String.class);
String image = snapshot.child("image").getValue(String.class);
String publisher = snapshot.child("Publisher").getValue(String.class);
String shelfno = snapshot.child("Shelf_no").getValue(String.class);
try {
if (bookname.toLowerCase().contains(searchedString.toLowerCase())) {
BookNameList.add(bookname);
AuthorNameList.add(author);
PublisherList.add(publisher);
Shelfnols.add(shelfno);
PicList.add(image);
Desc.add(desc);
counter++;
} else if (author.toLowerCase().contains(searchedString.toLowerCase())) {
BookNameList.add(bookname);
AuthorNameList.add(author);
PublisherList.add(publisher);
Shelfnols.add(shelfno);
PicList.add(image);
Desc.add(desc);
counter++;
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "not found", Toast.LENGTH_LONG).show();
}
if (counter == 15) {
break;
}
SearchAdapter searchAdapter = new SearchAdapter(SearchPage.this, BookNameList, AuthorNameList, PicList, PublisherList, Shelfnols);
recyclerView.setAdapter(searchAdapter);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
});
}
Это мой класс адаптера
public class SearchAdapter extends RecyclerView.Adapter<SearchAdapter.SearchViewHolder> {
public static final String id="key";
Context context;
ArrayList<String> BookNameList;
ArrayList<String> AuthorNameList;
ArrayList<String> PicList;
ArrayList<String> PublisherList;
ArrayList<String> Shelfnols;
LinearLayout booklayout;
class SearchViewHolder extends RecyclerView.ViewHolder{
ImageView bookimage;
TextView bookname, authorname,publisher,shelfno;
public SearchViewHolder(@NonNull View itemView) {
super(itemView);
bookimage = itemView.findViewById(R.id.Bookimg);
bookname = itemView.findViewById(R.id.BookName);
authorname = itemView.findViewById(R.id.AuthorName);
publisher = itemView.findViewById(R.id.Publications);
shelfno = itemView.findViewById(R.id.Shelfno);
booklayout=itemView.findViewById(R.id.LinLayout);
}
}
public SearchAdapter(Context context, ArrayList<String> bookNameList, ArrayList<String> authorNameList, ArrayList<String> picList,ArrayList<String> publisherList,ArrayList<String> shelfnols) {
this.context = context;
BookNameList = bookNameList;
AuthorNameList = authorNameList;
PicList = picList;
PublisherList=publisherList;
Shelfnols=shelfnols;
}
@NonNull
@Override
public SearchAdapter.SearchViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.activity_search_layout,parent,false);
return new SearchAdapter.SearchViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull SearchViewHolder holder, final int position) {
holder.bookname.setText(BookNameList.get(position));
holder.authorname.setText(AuthorNameList.get(position));
holder.publisher.setText(PublisherList.get(position));
holder.shelfno.setText(Shelfnols.get(position));
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String t=String.valueOf(position);
Toast.makeText(v.getContext(), "Item is clicked" + t, Toast.LENGTH_SHORT).show();
}
});
booklayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
это новое занятие, в котором я хочу показать детали книги
public class Bookdetailslayout extends SearchPage {
DatabaseReference reference;
TextView bookname,author,publisher,desc,location;
ImageView image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bookdetailslayout);
bookname = (TextView)findViewById(R.id.bkname);
author = (TextView) findViewById(R.id.aname);
publisher = (TextView) findViewById(R.id.pname);
desc = (TextView) findViewById(R.id.bkdescription);
location = (TextView) findViewById(R.id.bklocation);
String s = getIntent().getStringExtra("key");
DatabaseReference databaseReference=FirebaseDatabase.getInstance().getReference().child("books");
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
Bookdeets bookdeets=dataSnapshot.getValue(Bookdeets.class);
bookname.setText(bookdeets.getBookname());
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
Glide.with(context).asBitmap().load(PicList.get(position)).placeholder(R.mipmap.ic_launcher_round).into(holder.bookimage);
}
@Override
public int getItemCount() {
return BookNameList.size();
}