Develop Reference

Import an firebase image when i click it in the recyclerView?

What I've done alone so far is to bring up a activity (recyclerView of the products) when I click ImageView 1.
When I click on the image of recyclerView, my goal is to load the image I clicked on ImageView 1 and save it in DB.
How can I get an image?
this is my product's adapter
#NonNull
#Override
public HolderProductCody onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
//inflate layout
View view = LayoutInflater.from(context).inflate(R.layout.row_product_seller,parent,false);
return new HolderProductCody(view);
}
#Override
public void onBindViewHolder(#NonNull HolderProductCody holder, int position) {
//get data
final ModelProduct modelProduct = productList.get(position);
String id = modelProduct.getProductId();
String uid = modelProduct.getUid();
String detailAvailable = modelProduct.getDetailAvailable();
String productColor = modelProduct.getProductColor();
String productTpo = modelProduct.getProductTpo();
String productDescription = modelProduct.getProductDescription();
String productCategory = modelProduct.getProductCategory();
String icon = modelProduct.getProductIcon();
String SeasonCategory = modelProduct.getProductSeasonCategory();
String productSeasonCategory = modelProduct.getProductSeasonCategory();
String title = modelProduct.getProductTitle();
String timestamp = modelProduct.getTimestamp();
String originalPrice = modelProduct.getOriginalPrice();
//set data
holder.titleTv.setText(title);
holder.SeasonCategoryTv.setText(SeasonCategory);
holder.tpoTv.setText(productTpo);
holder.colorTv.setText(productColor);
holder.originalPriceTv.setText("$"+originalPrice);
if(detailAvailable.equals("true")){
//product is on discount
holder.tpoTv.setVisibility(View.VISIBLE);
holder.colorTv.setVisibility(View.VISIBLE);
}
else{
//product is not on discount
holder.tpoTv.setVisibility(View.GONE);
holder.colorTv.setVisibility(View.GONE);
}
try{
Picasso.get().load(icon).placeholder(R.drawable.ic_tshirt_black).into(holder.productIconIv);
}
catch(Exception e){
holder.productIconIv.setImageResource(R.drawable.ic_tshirt_black);
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//handle item clicks, show item details
Toast.makeText(context, "클릭됨", Toast.LENGTH_SHORT).show();
//addcodylayout(modelProduct);
}
});
}
private void addcodylayout(ModelProduct modelProduct) {
Dialog dialog = new Dialog(context);
View view = LayoutInflater.from(context).inflate(R.layout.activity_cody_product,null);
dialog.setContentView(view);
dialog.show();
//get data
final String id = modelProduct.getProductId();
String uid = modelProduct.getUid();
String detailAvailable = modelProduct.getDetailAvailable();
String productTpo = modelProduct.getProductTpo();
String productColor = modelProduct.getProductColor();
String productDescription = modelProduct.getProductDescription();
String productCategory = modelProduct.getProductCategory();
String icon = modelProduct.getProductIcon();
String productSeasonCategory = modelProduct.getProductSeasonCategory();
final String title = modelProduct.getProductTitle();
String timestamp = modelProduct.getTimestamp();
String originalPrice = modelProduct.getOriginalPrice();
try{
Picasso.get().load(icon).placeholder(R.drawable.ic_tshirt_black).into(productIconIv);
}
catch(Exception e){
productIconIv.setImageResource(R.drawable.ic_tshirt_black);
}
dialog.show();
}
#Override
public int getItemCount() {
return productList.size();
}
#Override
public Filter getFilter() {
if(filter==null){
filter = new FilterProduct(this,filterList);
}
return filter;
}
class HolderProductCody extends RecyclerView.ViewHolder{
/*holds views of recyclerview*/
private ImageView productIconIv;
private TextView tpoTv, titleTv, SeasonCategoryTv,colorTv,originalPriceTv;
public HolderProductCody(#NonNull View itemView) {
super(itemView);
productIconIv = itemView.findViewById(R.id.productIconIv);
tpoTv = itemView.findViewById(R.id.tpoTv);
titleTv = itemView.findViewById(R.id.titleTv);
SeasonCategoryTv = itemView.findViewById(R.id.categorySeasonTv);
colorTv = itemView.findViewById(R.id.colorTv);
originalPriceTv = itemView.findViewById(R.id.originalPriceTv);
}
}
}
this is my product's activity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cody_product);
filterProductBtn = findViewById(R.id.filterProductBtn);
productsRv = findViewById(R.id.productsRv);
filteredProductsTv = findViewById(R.id.filteredProductsTv);
getSupportActionBar().hide();
firebaseAuth = FirebaseAuth.getInstance();
filterProductBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(CodyProductActivity.this);
builder.setTitle("카테고리 선택").setItems(Constants.productCategories1, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//get selected item
String selected = Constants.productCategories1[which];
filteredProductsTv.setText(selected);
if (selected.equals("모든 옷")) {
//load all
loadAllProducts();
} else {
//load filtered
loadFilteredProducts(selected);
}
}
}).show();
}
});
}
private void loadFilteredProducts(String selected) {
productList = new ArrayList<>();
//get all products
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users");
reference.child(firebaseAuth.getUid()).child("Products").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
//before getting reset List
productList.clear();
for(DataSnapshot ds: dataSnapshot.getChildren()){
String productCategory = ""+ds.child("productCategory").getValue();
//if selected category matches product category then add in list
if(selected.equals(productCategory)){
ModelProduct modelProduct = ds.getValue(ModelProduct.class);
productList.add(modelProduct);
}
}
//setup adapter
adapterProductCody = new AdapterProductCody(CodyProductActivity.this,productList);
//set adapter
GridLayoutManager layoutManager = new GridLayoutManager(CodyProductActivity.this,3);
productsRv.setLayoutManager(layoutManager);
productsRv.setAdapter(adapterProductCody);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseerror) {
}
});
}
private void loadAllProducts() {
productList = new ArrayList<>();
//get all products
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users");
reference.child(firebaseAuth.getUid()).child("Products").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
//before getting reset List
productList.clear();
for (DataSnapshot ds : dataSnapshot.getChildren()) {
ModelProduct modelProduct = ds.getValue(ModelProduct.class);
productList.add(modelProduct);
}
//setup adapter
adapterProductCody = new AdapterProductCody(CodyProductActivity.this, productList);
//set adapter
GridLayoutManager layoutManager = new GridLayoutManager(CodyProductActivity.this, 3);
productsRv.setLayoutManager(layoutManager);
productsRv.setAdapter(adapterProductCody);
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
}
The ID value of ImageView1 is topImages.

How to show multiple random childs from Firebase Realtime Database

I am trying to show random users from Firebase Realtime Database .I am currently able to show one random user from my Firebase Realtime database but what i want to do is show 6 random users on to my recyclerview at once .But i am unable to figure out how to add query for same without getting an error at runtime.
Mycode
public class UsersFragment extends Fragment {
private RecyclerView recyclerView;
private UserAdapter mUserAdapter;
private List<User> mUsers;
String TAG = "MyTag";
ValueEventListener mValueEventListener;
List<String> UserIdsList = new ArrayList<>();
public UsersFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_users, container, false);
recyclerView = view.findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
mUsers = new ArrayList<>();
//readUser();
RandomUsers();
return view;
}
private void RandomUsers() {
//mUsers.add((User) UserIdsList);
mUserAdapter = new UserAdapter(getContext(), mUsers, false);
recyclerView.setAdapter(mUserAdapter);
mUserAdapter.notifyDataSetChanged();
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference UserIdsRef = rootRef.child("UserIds");
ValueEventListener mValueEventListener = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
String userIDS = ds.getKey();
UserIdsList.add(userIDS);
}
int UserListSize = UserIdsList.size();
Log.d(TAG, String.valueOf(UserListSize));
Random random=new Random();
int random1=random.nextInt(UserListSize);
// int Rdm= UserIdsList.get(new Random().nextInt(UserListSize));
DatabaseReference UserRef = rootRef.child("Users").child(UserIdsList.get(random1));
Log.d(TAG,"UserRef "+ String.valueOf(UserRef));
//new Random().nextInt(UserListSize)
ValueEventListener eventListener = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
User user = dataSnapshot.getValue(User.class);
mUsers.add(user);
mUserAdapter.notifyDataSetChanged();
String name = dataSnapshot.child("First").getValue(String.class);
Log.d(TAG, "Name called "+name);
}
#Override
public void onCancelled(DatabaseError databaseError) {
Log.d(TAG, "Error: " + databaseError.toException()); //Don't ignore errors!
}
};
UserRef.addListenerForSingleValueEvent(eventListener);
//UserRef.addValueEventListener(eventListener);
Query query2 = UserRef.limitToFirst(2);
query2.addListenerForSingleValueEvent(eventListener);
}
#Override
public void onCancelled(DatabaseError databaseError) {
Log.d(TAG, "Error: " + databaseError.getMessage()); //Don't ignore errors!
}
};
UserIdsRef.addListenerForSingleValueEvent(mValueEventListener);
//UserIdsRef.addValueEventListener(mValueEventListener);
}
}
UserAdapter.java
public class UserAdapter extends RecyclerView.Adapter<UserAdapter.ViewHolder> {
private Context mContext;
private List<User> mUsers;
private List<String> UserIdsList;
private boolean ischat;
String theLastMessage;
public UserAdapter(Context mContext, List<User> mUsers,boolean ischat) {
this.mContext = mContext;
this.mUsers = mUsers;
this.ischat=ischat;
}
#NonNull
#Override
public UserAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view= LayoutInflater.from(mContext).inflate(R.layout.user_item,parent,false);
return new UserAdapter.ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull UserAdapter.ViewHolder holder, int position) {
final User user=mUsers.get(position);
holder.username.setText(user.getFirst());
if (user.getImageURL().equals("default")){
holder.profile_image.setImageResource(R.mipmap.ic_launcher);
} else {
Glide.with(mContext).load(user.getImageURL()).into(holder.profile_image);
}
if (ischat){
lastMessage(user.getId(), holder.last_msg);
} else {
holder.last_msg.setVisibility(View.GONE);
}
if (ischat){
if (user.getStatus().equals("online")){
holder.img_on.setVisibility(View.VISIBLE);
holder.img_off.setVisibility(View.GONE);
} else {
holder.img_on.setVisibility(View.GONE);
holder.img_off.setVisibility(View.VISIBLE);
}
} else {
holder.img_on.setVisibility(View.GONE);
holder.img_off.setVisibility(View.GONE);
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(mContext, MessageActivity.class);
intent.putExtra("UserName",user.getFirst());
intent.putExtra("userid", user.getId());
intent.putExtra("ImageURL",user.getImageURL());
mContext.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
return mUsers.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView username;
public ImageView profile_image;
private ImageView img_on;
private ImageView img_off;
private TextView last_msg;
public ViewHolder(#NonNull View itemView) {
super(itemView);
username=itemView.findViewById(R.id.username);
profile_image=itemView.findViewById(R.id.profile_image);
img_on = itemView.findViewById(R.id.img_on);
img_off = itemView.findViewById(R.id.img_off);
last_msg=itemView.findViewById(R.id.last_msg);
}
}
private void lastMessage(final String userid, final TextView last_msg){
theLastMessage = "default";
final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Chats");
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
Chat chat = snapshot.getValue(Chat.class);
if (firebaseUser != null && chat != null) {
if (chat.getReceiver().equals(firebaseUser.getUid()) && chat.getSender().equals(userid) ||
chat.getReceiver().equals(userid) && chat.getSender().equals(firebaseUser.getUid())) {
theLastMessage = chat.getMessage();
}
}
}
switch (theLastMessage){
case "default":
last_msg.setText("No Message");
break;
default:
last_msg.setText(theLastMessage);
break;
}
theLastMessage = "default";
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
}
Data Snapshot
DataSnapshot { key = KRhmaWXCctMHbU1Z6NAWRGGw2ag2, value = {EmailId=abc#gmail.com, First=shivam} }

You can try this:
DatabaseReference UserRef = rootRef.child("Users").orderByKey().startAt(UserIdsList.get(random1)).lim‌​itToFirst(6);
ValueEventListener eventListener = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
User user = dataSnapshot.getValue(User.class);
mUsers.add(user);
mUserAdapter.notifyDataSetChanged();
String name = dataSnapshot.child("First").getValue(String.class);
Log.d(TAG, "Name called "+name);
}
#Override
public void onCancelled(DatabaseError databaseError) {
Log.d(TAG, "Error: " + databaseError.toException());
}
};
UserRef.addListenerForSingleValueEvent(eventListener);

Sorting recycler view items according to most recent message

I'm building a chat application using firebase, i want to sort the chat list according to most recent message. The user you sent a message to last should appear at the top. Previous messages should come below, please help!
I've already tried orderbychild("time") it didn't work.
Chats Fragment
public class ChatsFragment extends Fragment {
private View PrivateChatView;
private RecyclerView chatsList;
private RecyclerView chatsLists;
private DatabaseReference ChatsRef,
UsersRef,
RootRef,
MsgRef;
private FirebaseAuth mAuth;
private FirebaseUser mUser;
private String currentUserID;
private String theLastMessage;
public ChatsFragment() { // Required empty public constructor
}
#Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment
PrivateChatView = inflater.inflate(R.layout.fragment_chats, container, false);
mAuth = FirebaseAuth.getInstance();
mUser = FirebaseAuth.getInstance().getCurrentUser();
currentUserID = mAuth.getCurrentUser().getUid();
ChatsRef = FirebaseDatabase.getInstance().getReference().child("Friends").child(currentUserID);
UsersRef = FirebaseDatabase.getInstance().getReference().child("Users");
MsgRef = FirebaseDatabase.getInstance().getReference().child("Messages").child(currentUserID);
RootRef = FirebaseDatabase.getInstance().getReference();
chatsList = (RecyclerView)PrivateChatView.findViewById(R.id.chats_list);
final LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
chatsList.setLayoutManager(layoutManager);
chatsLists = (RecyclerView)PrivateChatView.findViewById(R.id.chats_lists);
chatsLists.setLayoutManager(new LinearLayoutManager(getContext()));
updateToken(FirebaseInstanceId.getInstance().getToken());
return PrivateChatView;
}
private void updateToken(String token) {
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Tokens");
Token token1 = new Token(token);
reference.child(currentUserID).setValue(token1);
}
#Override public void onStart() {
super.onStart();
chats();
friends();
}
private void chats() {
FirebaseRecyclerOptions<Friends> options = new FirebaseRecyclerOptions.Builder<Friends>().setQuery(MsgRef.getRef().orderByChild("date"), Friends.class).build();
FirebaseRecyclerAdapter<Friends, ChatsViewHolder> adapter = new FirebaseRecyclerAdapter<Friends, ChatsViewHolder>(options) {
#Override protected void onBindViewHolder(#NonNull final ChatsViewHolder holder, int position, #NonNull final Friends model) {
final String usersID = getRef(position).getKey();
final String[] retImage = {
"default_image"
};
final String list_user_id = getRef(position).getKey();
Query lastMessageQuery = MsgRef.child(list_user_id).limitToLast(1);
lastMessageQuery.addChildEventListener(new ChildEventListener() {
#Override public void onChildAdded(DataSnapshot dataSnapshot, String s) {
String data = dataSnapshot.child("time").getValue().toString();
String data1 = dataSnapshot.child("date").getValue().toString();
holder.userStatus.setText(data + " " + data1);
holder.userStatus.setTypeface(null, Typeface.NORMAL);
}
#Override public void onChildChanged(DataSnapshot dataSnapshot, String s) {}
#Override public void onChildRemoved(DataSnapshot dataSnapshot) {}
#Override public void onChildMoved(DataSnapshot dataSnapshot, String s) {}
#Override public void onCancelled(DatabaseError databaseError) {}
});
UsersRef.child(usersID).addValueEventListener(new ValueEventListener() {
#Override public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.hasChild("image")) {
retImage[0] = dataSnapshot.child("image").getValue().toString();
Picasso.get().load(retImage[0]).placeholder(R.drawable.profile).into(holder.profileImage);
}
final String retName = dataSnapshot.child("name").getValue().toString();
final String retStatus = dataSnapshot.child("status").getValue().toString();
holder.userName.setText(retName);
if (dataSnapshot.child("userState").hasChild("state")) {
String state = dataSnapshot.child("userState").child("state").getValue().toString();
String date = dataSnapshot.child("userState").child("date").getValue().toString();
String time = dataSnapshot.child("userState").child("time").getValue().toString();
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent chatIntent = new Intent(getContext(), ChatActivityy.class);
chatIntent.putExtra("visit_user_id", usersID);
chatIntent.putExtra("visit_user_name", retName);
chatIntent.putExtra("visit_image", retImage);
startActivity(chatIntent);
}
});
}
#Override public void onCancelled(#NonNull DatabaseError databaseError) {}
});
}
#NonNull #Override public ChatsViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.user_chat_layout, viewGroup, false);
return new ChatsViewHolder(view);
}
};
chatsList.setAdapter(adapter);
adapter.startListening();
}
private void friends() {
FirebaseRecyclerOptions<Friends> options = new FirebaseRecyclerOptions.Builder<Friends>().setQuery(ChatsRef, Friends.class).build();
FirebaseRecyclerAdapter<Friends, ChatsViewHolder> adapter = new FirebaseRecyclerAdapter<Friends, ChatsViewHolder>(options) {
#Override protected void onBindViewHolder(#NonNull final ChatsViewHolder holder, int position, #NonNull final Friends model) {
final String usersID = getRef(position).getKey();
final String[] retImage = {
"default_image"
};
final String list_user_id = getRef(position).getKey();
UsersRef.child(usersID).addValueEventListener(new ValueEventListener() {
#Override public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.hasChild("image")) {
retImage[0] = dataSnapshot.child("image").getValue().toString();
Picasso.get().load(retImage[0]).placeholder(R.drawable.profile).into(holder.profileImage);
}
final String retName = dataSnapshot.child("name").getValue().toString();
final String retStatus = dataSnapshot.child("status").getValue().toString();
holder.userName.setText(retName);
if (dataSnapshot.child("userState").hasChild("state")) {
String state = dataSnapshot.child("userState").child("state").getValue().toString();
String date = dataSnapshot.child("userState").child("date").getValue().toString();
String time = dataSnapshot.child("userState").child("time").getValue().toString();
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent chatIntent = new Intent(getContext(), ChatActivityy.class);
chatIntent.putExtra("visit_user_id", usersID);
chatIntent.putExtra("visit_user_name", retName);
chatIntent.putExtra("visit_image", retImage);
startActivity(chatIntent);
}
});
}
#Override public void onCancelled(#NonNull DatabaseError databaseError) {}
});
}
#NonNull #Override public ChatsViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.user_chat_layout, viewGroup, false);
return new ChatsViewHolder(view);
}
};
chatsLists.setAdapter(adapter);
adapter.startListening();
}
public static class ChatsViewHolder extends RecyclerView.ViewHolder {
CircleImageView profileImage;
TextView userStatus,
userName;
ImageView icon;
public ChatsViewHolder(#NonNull View itemView) {
super(itemView);
profileImage = itemView.findViewById(R.id.users_profile_image);
userStatus = itemView.findViewById(R.id.user_status);
userName = itemView.findViewById(R.id.user_profile_name);
icon = itemView.findViewById(R.id.user_online_status);
}
}
}

How to retrieve values from FireBase to JSONArray?

I got a source code of a food delivery app from git. he is parsing a website and displaying the menu items, I guess to see the
instead of this I have created a fire-base database and stored one food item for testing
I want to display my item from the fire-base to the app menu I will show the code of all food item fragment,
package com.example.guanzhuli.foody.HomePage.fragment;
public class AllTabFragment extends Fragment {
private String baseUrl = "http://rjtmobile.com/ansari/fos/fosapp/fos_food_loc.php?city=";
private String TAG = "ALLFOOD";
private StorageReference mStorageRef;
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference("menu");
ArrayList<Food> foods = new ArrayList<>();
private RecyclerView mRecyclerView;
private AllFoodAdapter adapter;
private RecyclerView.LayoutManager layoutManager;
String foodName;
public AllTabFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_all_tab, container, false);
mDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
foodName = snapshot.child("name").getValue().toString();
String foodPrice = snapshot.child("prize").getValue().toString();
Toast.makeText(getActivity(), foodName, Toast.LENGTH_SHORT).show();
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
// Request Data From Web Service
if (foods.size() == 0) {
objRequestMethod();
}
mRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerview_all);
mRecyclerView.setHasFixedSize(false);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
adapter = new AllFoodAdapter(getActivity(), foods);
adapter.setOnItemClickListener(new AllFoodAdapter.OnRecyclerViewItemClickListener() {
#Override
public void onItemClick(View view, String data) {
Bundle itemInfo = new Bundle();
for (int i = 0; i < foods.size(); i++) {
if (foods.get(i).getId() == Integer.valueOf(data)) {
itemInfo.putInt("foodId", foods.get(i).getId());
itemInfo.putString("foodName", foods.get(i).getName());
// itemInfo.putString("foodName", foodName);
itemInfo.putString("foodCat", foods.get(i).getCategory());
itemInfo.putString("foodRec", foods.get(i).getRecepiee());
itemInfo.putDouble("foodPrice", foods.get(i).getPrice());
itemInfo.putString("foodImage", foods.get(i).getImageUrl());
break;
}
}
FoodDetailFragment foodDetailFragment = new FoodDetailFragment();
foodDetailFragment.setArguments(itemInfo);
getActivity().getSupportFragmentManager()
.beginTransaction()
.setCustomAnimations(R.anim.fade_in, R.anim.fade_out, R.anim.fade_in, R.anim.fade_out)
.replace(R.id.main_fragment_container, foodDetailFragment)
.addToBackStack(AllTabFragment.class.getName())
.commit();
}
});
mRecyclerView.setAdapter(adapter);
return view;
}
private void objRequestMethod() {
HomePageActivity.showPDialog();
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET, buildUrl(), null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject jsonObject) {
Log.d(TAG, jsonObject.toString());
try {
JSONArray foodsJsonArr = jsonObject.getJSONArray("Food");
for (int i = 0; i < foodsJsonArr.length(); i++) {
JSONObject c = foodsJsonArr.getJSONObject(i);
String id = c.getString("FoodId");
String name = c.getString("FoodName");
String recepiee = c.getString("FoodRecepiee");
String price = c.getString("FoodPrice");
String category = c.getString("FoodCategory");
String thumb = c.getString("FoodThumb");
final Food curFood = new Food();
curFood.setCategory(category);
curFood.setName(name);
curFood.setRecepiee(recepiee);
curFood.setPrice(Double.valueOf(price));
curFood.setId(Integer.valueOf(id));
curFood.setImageUrl(thumb);
foods.add(curFood);
// Log.e("Current Food", curFood.getName());
ImageLoader imageLoader = VolleyController.getInstance().getImageLoader();
imageLoader.get(thumb, new ImageLoader.ImageListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Image Load Error: " + error.getMessage());
}
#Override
public void onResponse(ImageLoader.ImageContainer response, boolean arg1) {
if (response.getBitmap() != null) {
curFood.setImage(response.getBitmap());
// Log.e("SET IMAGE", curFood.getName());
adapter.notifyData(foods);
}
}
});
foods.get(i).setImage(curFood.getImage());
}
} catch (Exception e) {
System.out.println(e);
}
HomePageActivity.disPDialog();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
VolleyLog.d(TAG, "ERROR" + volleyError.getMessage());
Toast.makeText(getActivity(), volleyError.getMessage(),
Toast.LENGTH_SHORT).show();
HomePageActivity.disPDialog();
}
});
VolleyController.getInstance().addToRequestQueue(jsonObjReq);
}
private String buildUrl() {
return baseUrl + HomePageActivity.City;
}
}
I got food name from fire-base and stored in the string called "foodname" Now I want to display it in the menu, how can I do it?
if my question is wrong please forgive me, please help me
package com.example.guanzhuli.foody.HomePage.adapter;
public class AllFoodAdapter extends RecyclerView.Adapter<AllHolder> implements
View.OnClickListener {
private Context mContext;
ArrayList<Food> foods;
public String TAG = "ALLFOOD";
//
// public AllFoodAdapter(Context context) {
// mContext = context;
// }
public AllFoodAdapter(Context context, ArrayList<Food> foods) {
mContext = context;
this.foods = foods;
}
#Override
public AllHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(mContext).inflate(R.layout.cardview_food, parent, false);
AllHolder allHolder = new AllHolder(v);
v.setOnClickListener(this);
return allHolder;
}
#Override
public void onBindViewHolder(AllHolder holder, int position) {
holder.mTextId.setText(String.valueOf(foods.get(position).getId()));
holder.mTextName.setText(foods.get(position).getName());
holder.mTextPrice.setText(String.valueOf(foods.get(position).getPrice()));
holder.mTextCategory.setText(foods.get(position).getCategory());
holder.mImageView.setImageBitmap(foods.get(position).getImage());
holder.itemView.setTag(foods.get(position).getId());
}
#Override
public int getItemCount() {
return foods.size();
}
public void notifyData(ArrayList<Food> foods) {
// Log.d("notifyData ", foods.size() + "");
this.foods = foods;
notifyDataSetChanged();
}
public static interface OnRecyclerViewItemClickListener {
void onItemClick(View view, String data);
}
private OnRecyclerViewItemClickListener mOnItemClickListener = null;
public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
this.mOnItemClickListener = listener;
}
#Override
public void onClick(View view) {
if (mOnItemClickListener != null) {
mOnItemClickListener.onItemClick(view, String.valueOf(view.getTag()));
} else {
Log.e("CLICK", "ERROR");
}
}
}
class AllHolder extends RecyclerView.ViewHolder {
NetworkImageView mImage;
ImageView mImageView;
TextView mTextId, mTextName, mTextCategory, mTextPrice;
public AllHolder(View itemView) {
super(itemView);
// mImage = (NetworkImageView) itemView.findViewById(R.id.food_img);
mImageView = (ImageView) itemView.findViewById(R.id.food_img);
mTextId = (TextView) itemView.findViewById(R.id.food_id);
mTextName = (TextView) itemView.findViewById(R.id.food_name);
mTextPrice = (TextView) itemView.findViewById(R.id.food_price);
mTextId = (TextView) itemView.findViewById(R.id.food_id);
mTextCategory = (TextView) itemView.findViewById(R.id.food_category);
}
}
Please help me, because it is an important project for me

If you want to display the strings you have received from firebase in a new activity as a list, you can declare an ArrayList and then add those strings to it and then with an adapter set it to display.
In code it looks something like this:
private ArrayList array;
private ListView listView;
private FirebaseAuth mAuth = FirebaseAuth.getInstance();
private String curName;
//set them
listView = findViewById(R.id.list1);
array = new ArrayList<String>();
DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("menu");
ref.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
array.add(ds.child("name").getValue(String.class));
}
ArrayAdapter adapter = new ArrayAdapter(Main6Activity.this, android.R.layout.simple_list_item_1, array);
listView.setAdapter(adapter);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});

stackoverflow was not conceived to get complete code solutions. We can only help you on some point. Other than that, you need to think to use the Food class for read and write values on your db. When you retrive the values, get it as a Food object casting it by method dataSnapshot.getValue("object class");...
In your case you need a code like this:
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
Food food = snapshot.getValue(Food.class);
//here you need to add the food object to a list and after the for diplay it with adapter.
//for example foodsList.add(food);
}
foodsList.setAdapter(myAdepter); //ecc
}
If you need help, please tell us more

You seem to be loading the food items from the database, and reading the values from them. All that's left to do, is add each item to the foods array, and tell the adapter that its data has changed:
mDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
String foodName = snapshot.child("name").getValue(String.class);
String foodPrice = snapshot.child("prize").getValue(String.class);
Food food = new Food();
food.setName(name);
food.setPrice(Double.valueOf(price));
foods.add(food);
}
adapter.notifyDataSetChanged();
}
#Override
public void onCancelled(DatabaseError databaseError) {
throw databaseError.toException();
}
});

Sorting FirebaseRecyclerAdapter on Client Side

I want to sort FirebaseRecyclerAdapter on the TIME BASIS. I'm working on That Application so whenever new Message comes then That Dialog goes on The Top of the Layout, it also contain time of Sending the Message so The message which is new Then that should be in The Top of the Recyclerview. So So How Can i sort The FirebaseRecyclerAdapter on the Time Basis
Here is me Code
madapter = new FirebaseRecyclerAdapter<user, contact.UserViewHolder>(user.class, R.layout.activity_dialogs_list, contact.UserViewHolder.class, muserref) {
#Override
protected void populateViewHolder(final UserViewHolder viewHolder, user model, final int position) {
final String ais = model.getName();
viewHolder.setName(model.getName());
final String b = model.groupId;
//Toast.makeText(contact.this,viewHolder.getLayoutPosition(),LENGTH_SHORT).show();
mref = FirebaseDatabase.getInstance().getReference().child("LastMessage").child(b);
mref.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot childSnapShot : dataSnapshot.getChildren()) {
val=lmlm;
HashMap<String, Object> hashmap = (HashMap) dataSnapshot.getValue();
val = (String) hashmap.get("lastm");
Long role = (Long) hashmap.get("timestampCreated");
String lastsender = (String) hashmap.get("LastmessageSender");
getTimeago getTimeAgo = new getTimeago();
String lastSeenTime = getTimeAgo.getTimeAgo(role);
//SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yy HH:mm:ss");
//String dateAsString = sdf.format (role);
//change(position);
// swape(viewHolder.getAdapterPosition());
if (val.length() > 40) {
String nawa = val.substring(0, 40);
viewHolder.setLastmessage((nawa + "..."));
viewHolder.setLastTime(lastSeenTime);
} else {
viewHolder.setLastmessage(val);
viewHolder.setLastTime(lastSeenTime);
}
//viewHolder.setLastmessage(val);
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
mimage = FirebaseDatabase.getInstance().getReference().child("Image").child(b);
mimage.keepSynced(true);
mimage.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot childSnapShot : dataSnapshot.getChildren()) {
HashMap<String, Object> hashmap = (HashMap) dataSnapshot.getValue();
final String vala = (String) hashmap.get("image");
viewHolder.setImage(vala, getApplicationContext());
/// //viewHolder.setImage(val,getApplicationContext());
//viewHolder.setImage(vala);
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
Toast.makeText(contact.this,"Something Went wrong",LENGTH_SHORT).show();
}
});
}
});
}
};
mUserlist.setAdapter(madapter);
madapter.notifyDataSetChanged();
And Here is My Holder
`
public static class UserViewHolder extends RecyclerView.ViewHolder {
View mview;
ImageLoader imageLoader;
public UserViewHolder(View itemView) {
super(itemView);
mview = itemView;
}
public void setName(String name) {
TextView username = (TextView) mview.findViewById(R.id.dialogName);
username.setText(name);
}
public void setLastmessage(String lastmessage) {
TextView set = (TextView) mview.findViewById(R.id.dialogLastMessage);
set.setText(lastmessage);
}
public void setLastTime(String lastTime) {
TextView time = (TextView) mview.findViewById(R.id.dialogDate);
time.setText(lastTime);
}
public void setImage(final String vala, final Context applicationContext) {
final CircleImageView cm = (CircleImageView) mview.findViewById(R.id.dialogAvatar);
Picasso.with(applicationContext).load(vala).networkPolicy(NetworkPolicy.OFFLINE).into(cm, new Callback() {
#Override
public void onSuccess() {
Picasso.with(applicationContext).load(vala).into(cm);
}
#Override
public void onError() {
Picasso.with(applicationContext).load(vala).into(cm);
}
});
}
`
So if new Message comes in SE Comps then that Dialog Show goes on The Top of RecyclerViewSo How can i get that please Help

Did you try orderByChild function to sort firebase list data?
ref.orderByChild('< time_key >')
OrderByChild will work with ChildEventListner
check this link