I have a lists in which each row will consist of multiple chips.
On each row I can able to type anything and suggestion would come and if I select any of the suggestion then chip will be added in same row just like auto complete text view.
I tried many things like adding views dynamically in linear layout and others but not getting the solution.
I appreciate If anyone knows how to do it.
This is my code run succesfully ;
package com.example.masterappinc;
public class Judgedetailadapter extends RecyclerView.Adapter {
Judgedetailreturn judgedetailreturn;
List<Judgedetailreturn> judgelist;
Context context;
public Judgedetailadapter(List<Judgedetailreturn> judgelist, Context context) {
this.judgelist = judgelist;
this.context = context;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater =LayoutInflater.from(context);
View view= inflater.inflate(R.layout.cardviewjudgedetail,parent,false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final MyViewHolder holder, int position) {
final Judgedetailreturn judgedetailreturn1=judgelist.get(position);
holder.name.setText(judgedetailreturn1.getName());
String ide = judgedetailreturn1.getId();
holder.id.setText(ide);
holder.company.setText(judgedetailreturn1.getCompany());
holder.mobno.setText(judgedetailreturn1.getMobno());
holder.domain.setText(judgedetailreturn1.getDomain());
holder.email.setText(judgedetailreturn1.getEmail());
Firebase mref = new Firebase("https://master-app-inc.firebaseio.com/judgeid/"+ide+"/StudentIDalloted");
mref.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
Chip chip=new Chip(holder.chipGroup.getContext());
chip.setText(dataSnapshot.getValue().toString());
holder.chipGroup.addView(chip);
}
#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(FirebaseError firebaseError) {
}
});
}
#Override
public int getItemCount() {
return judgelist.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
ChipGroup chipGroup;
TextView name,id,email,mobno,company,domain;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
name = itemView.findViewById(R.id.namejudegedetail);
id = itemView.findViewById(R.id.judgeidjudegedetail);
email = itemView.findViewById(R.id.emailidjudegedetail);
mobno = itemView.findViewById(R.id.mobilenojudgedetail);
company = itemView.findViewById(R.id.companynamejudegedetail);
domain= itemView.findViewById(R.id.domainjudgedetail);
chipGroup = itemView.findViewById(R.id.chipgrp);
}
}
public void toast(String x){
Toast.makeText(context,x,Toast.LENGTH_SHORT).show();
}
}
Hope this run !
Related
I have a firebase strucuture as
The recycler view is only displaying the last added or say latest added node to the database instead of displaying each and every node
the database reference i am using is
r2 = FirebaseDatabase.getInstance().getReference().child("Uploads").child("Wheat").child(S).child(D).child(T).child(FirebaseAuth.getInstance().getUid());
and the code for recycler view is as
public class MyPost extends AppCompatActivity {
private RecyclerView recyclerView;
private DatabaseReference r, r2, r3;
private String S, D, T;
FirebaseRecyclerAdapter<RecyclerCropView, ViewHolder2> Fbra1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_post);
r = FirebaseDatabase.getInstance().getReference().child("User_Data").child(MainDashboard.type).child(FirebaseAuth.getInstance().getUid());
recyclerView = (RecyclerView) findViewById(R.id.R_view2);
r.addListenerForSingleValueEvent(rr);
}
private ValueEventListener rr = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
S = dataSnapshot.child("State").getValue().toString();
D = dataSnapshot.child("City").getValue().toString();
T = dataSnapshot.child("Tehsil").getValue().toString();
// Toast.makeText(MyPost.this,S+D+T.toString(),Toast.LENGTH_LONG).show();
r2 = FirebaseDatabase.getInstance().getReference().child("Uploads").child("Wheat").child(S).child(D).child(T).child(FirebaseAuth.getInstance().getUid());
// Toast.makeText(MyPost.this,r2.toString(),Toast.LENGTH_LONG).show();
r2.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
r3=r2.child(dataSnapshot.getKey());
Toast.makeText(MyPost.this, r3.toString(), Toast.LENGTH_LONG).show();
FirebaseRecyclerOptions<RecyclerCropView> options = new FirebaseRecyclerOptions.Builder<RecyclerCropView>().setQuery(r3, RecyclerCropView.class).build();
Fbra1 = new FirebaseRecyclerAdapter<RecyclerCropView, ViewHolder2>(options) {
#Override
protected void onBindViewHolder(#NonNull ViewHolder2 holder, int position, #NonNull RecyclerCropView model) {
holder.setProductImage(model.getProduct_Image());
holder.setProduct(model.getProduct());
holder.setMax(model.getMaximumPrice());
holder.setQuantityUnit(model.getQuantityUnit());
holder.setQuantity(model.getQuantity());
}
#NonNull
#Override
public ViewHolder2 onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_post, parent, false);
return new ViewHolder2(v);
}
};
Fbra1.notifyDataSetChanged();
recyclerView.hasFixedSize();
recyclerView.setLayoutManager(new LinearLayoutManager(MyPost.this));
Fbra1.startListening();
recyclerView.setAdapter(Fbra1);
}
#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) {
}
});
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
};
#Override
protected void onRestart() {
super.onRestart();
finish();
}
}
Recycler view is only showing very last item that was added to database.
Note:-
The item.xml file has width set to wrap content.
if i remove the childEventListener the recyclerView shows multiple items with
null on the place of TextView(These are those textView on which data retrived was supposed to be set)
Here is the problem: r2.addChildEventListener
Classes implementing this interface can be used to receive events about changes in the child locations of a given DatabaseReference ref. Attach the listener to a location using addChildEventListener(ChildEventListener) and the appropriate method will be triggered when changes occur.
Firebase Docs
What you should use is a r2.addListenerForSingleValueEvent
This returns the children of the specific node. But now since you are using FirebaseUI library, you will not need to listen as it is a listener itself.
So your code should listen to the root of the posts. This r3=r2.child(dataSnapshot.getKey()); is unnecessary because it only gets one entry
Change to this
FirebaseRecyclerOptions<RecyclerCropView> options = new FirebaseRecyclerOptions.Builder<RecyclerCropView>().setQuery(r2, RecyclerCropView.class).build();
Fbra1 = new FirebaseRecyclerAdapter<RecyclerCropView, ViewHolder2>(options) {
#Override
protected void onBindViewHolder(#NonNull ViewHolder2 holder, int position, #NonNull RecyclerCropView model) {
holder.setProductImage(model.getProduct_Image());
holder.setProduct(model.getProduct());
holder.setMax(model.getMaximumPrice());
holder.setQuantityUnit(model.getQuantityUnit());
holder.setQuantity(model.getQuantity());
}
#NonNull
#Override
public ViewHolder2 onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_post, parent, false);
return new ViewHolder2(v);
}
};
Fbra1.notifyDataSetChanged();
recyclerView.hasFixedSize();
recyclerView.setLayoutManager(new LinearLayoutManager(MyPost.this));
Fbra1.startListening();
recyclerView.setAdapter(Fbra1);
I am trying to implement multiple view or so called heterogeneous recyclerview using firebase realtime database. I found a example of heterogeneous recyclerview implementation on github.
I followed this to implement on firebase. But my code didn't work.
fragment_search.java (one of the fragment in my tabbed view) This is my fragment file which contains the main recyclerview which will hold multiple views
public class fragment_search extends Fragment {
RecyclerView recyclerViewSearch;
private static SingleSearchBannerModel singleSearchBannerModel;
private static SingleSearchType1Model singleSearchType1Model;
private static DatabaseReference databaseReference;
private List<Object> objects = new ArrayList<>();
private static SearchMainAdapter searchMainAdapter;
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_search,null);
//Recycler view initialized and Properties Set.
recyclerViewSearch = view.findViewById(R.id.recyclerview_search);
recyclerViewSearch.setHasFixedSize(true);
recyclerViewSearch.setLayoutManager(new LinearLayoutManager(getContext()));
databaseReference = FirebaseDatabase.getInstance().getReference();
return view;
}
private List<Object> getObjects(){
objects.addAll(getBannerData());
objects.addAll(getType1Data());
return objects;
}
public static List<SingleSearchBannerModel> getBannerData(){
final List<SingleSearchBannerModel> singleSearchBannerModelList = new ArrayList<>();
databaseReference.child("Featured").addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
singleSearchBannerModel = dataSnapshot.getValue(SingleSearchBannerModel.class);
singleSearchBannerModelList.add(singleSearchBannerModel);
searchMainAdapter.notifyDataSetChanged();
System.out.println("this is image in getBanner == "+singleSearchBannerModel.getImage());
}
#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) {
}
});
return singleSearchBannerModelList;
}
public static List<SingleSearchType1Model> getType1Data(){
final List<SingleSearchType1Model> singleSearchType1ModelList = new ArrayList<>();
databaseReference.child("Featured").addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
singleSearchType1Model = dataSnapshot.getValue(SingleSearchType1Model.class);
singleSearchType1ModelList.add(singleSearchType1Model);
searchMainAdapter.notifyDataSetChanged();
}
#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) {
}
});
return singleSearchType1ModelList;
}
#Override
public void onStart() {
super.onStart();
searchMainAdapter = new SearchMainAdapter(getContext(),getObjects());
System.out.println("this is getObject == "+getObjects());
System.out.println("this is getBanner == "+getBannerData());
System.out.println("this is getType1 == "+getType1Data());
recyclerViewSearch.setAdapter(searchMainAdapter);
}
}
fragment_home.xml this is the xml file of fragment which contains one recyclerview (My main recyclerview).
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerview_search"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
Model files
*I have two model files. Basically getter and setters *
SingleSearchBannerModel.java My firsts model file.
public class SingleSearchBannerModel {
String Image;
public SingleSearchBannerModel() {
}
public SingleSearchBannerModel(String image) {
Image = image;
}
public String getImage() {
return Image;
}
public void setImage(String image) {
Image = image;
}
}
SingleSearchType1Model.java This is my second model file.
public class SingleSearchType1Model {
String Image;
public SingleSearchType1Model() {
}
public SingleSearchType1Model(String image) {
Image = image;
}
public String getImage() {
return Image;
}
public void setImage(String image) {
Image = image;
}
}
RecyclerView Adapters
Adapters are the ones used to set the value to the recyclerView. I have three Adapters as I'm trying to insert two views in one recyclerview. One is the MainAdapter which combines the other two Adapters. The MainAdapter is set to the the recyclerview of fragment_search.java (my main fragment)
SearchBannerAdapter.java This adapter is to generate the required layout file and populate the inflated layout file.
public class SearchBannerAdapter extends RecyclerView.Adapter<SearchBannerAdapter.TaskViewHolder>{
List<SingleSearchBannerModel> data;
public SearchBannerAdapter(List<SingleSearchBannerModel> data) {
this.data = data;
}
#NonNull
#Override
public TaskViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.search_single_banners,parent,false);
return new TaskViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull TaskViewHolder holder, int position) {
SingleSearchBannerModel singleSearchBannerModel = data.get(position);
Picasso.get().load(singleSearchBannerModel.getImage()).fit().into(holder.imageView);
}
#Override
public int getItemCount() {
return data.size();
}
public static class TaskViewHolder extends RecyclerView.ViewHolder{
View mView;
ImageView imageView;
public TaskViewHolder(View itemView) {
super(itemView);
mView = itemView;
imageView = mView.findViewById(R.id.search_banner_imgView);
}
}
}
search_single_banners.xml The xml file which is inflated in SearchBannerAdapter.java
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.v7.widget.CardView
android:layout_width="290dp"
android:layout_height="160dp"
android:id="#+id/longCard"
android:layout_marginTop="50dp"
android:layout_marginEnd="20dp"
app:cardCornerRadius="20sp"
app:cardElevation="#dimen/ten"
app:cardPreventCornerOverlap="false"
android:layout_centerHorizontal="true">
<ImageView
android:id="#+id/search_banner_imgView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/test1"/>
</android.support.v7.widget.CardView>
SearchType1Adapter.java This is the second adapter which inflates search_type_1.xml
public class SearchType1Adapter extends RecyclerView.Adapter<SearchType1Adapter.TaskViewHolder>{
List<SingleSearchType1Model> data;
public SearchType1Adapter(List<SingleSearchType1Model> data) {
this.data = data;
}
#NonNull
#Override
public TaskViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.search_type_1,parent,false);
return new TaskViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull TaskViewHolder holder, int position) {
SingleSearchType1Model singleSearchType1Model = data.get(position);
Picasso.get().load(singleSearchType1Model.getImage()).fit().into(holder.imageView);
}
#Override
public int getItemCount() {
return data.size();
}
public static class TaskViewHolder extends RecyclerView.ViewHolder{
View mView;
ImageView imageView;
public TaskViewHolder(View itemView) {
super(itemView);
mView = itemView;
imageView = mView.findViewById(R.id.search_single_type_1_imgView);
}
}
}
search_type_1.xml The file that is inflated in SearchType1Adapter.java
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.v7.widget.CardView
android:layout_width="290dp"
android:layout_height="160dp"
android:id="#+id/longCard"
android:layout_marginTop="50dp"
android:layout_marginEnd="20dp"
app:cardCornerRadius="20sp"
app:cardElevation="#dimen/ten"
app:cardPreventCornerOverlap="false"
android:layout_centerHorizontal="true">
<ImageView
android:id="#+id/search_single_type_1_imgView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/test1"/>
</android.support.v7.widget.CardView>
SearchMainAdapter.java This is the main adapter which is used in fragment_search to populate the main recyclerview.
public class SearchMainAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private List<Object> items;
private final int BANNER = 1;
private final int TYPE1 = 2;
public SearchMainAdapter(Context context, List<Object> items) {
this.context = context;
this.items = items;
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view;
RecyclerView.ViewHolder holder;
switch (viewType){
case BANNER:
view = inflater.inflate(R.layout.search_banners,parent,false);
holder = new BannerViewHolder(view);
break;
case TYPE1:
view = inflater.inflate(R.layout.search_type_1,parent,false);
holder = new Type1ViewHolder(view);
break;
default:
view = inflater.inflate(R.layout.search_banners,parent,false);
holder = new Type1ViewHolder(view);
break;
}
return holder;
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
if(holder.getItemViewType() == BANNER)
BannerView((BannerViewHolder) holder);
else if (holder.getItemViewType() == TYPE1)
Type1View((Type1ViewHolder) holder);
}
private void BannerView(BannerViewHolder holder){
SearchBannerAdapter searchBannerAdapter = new SearchBannerAdapter(getBannerData());
holder.recyclerView.setLayoutManager(new LinearLayoutManager(context,LinearLayoutManager.HORIZONTAL,false));
holder.recyclerView.setAdapter(searchBannerAdapter);
}
private void Type1View(Type1ViewHolder holder){
SearchType1Adapter searchType1Adapter = new SearchType1Adapter(getType1Data());
holder.recyclerView.setLayoutManager(new LinearLayoutManager(context,LinearLayoutManager.HORIZONTAL,false));
holder.recyclerView.setAdapter(searchType1Adapter);
}
#Override
public int getItemCount() {
return items.size();
}
#Override
public int getItemViewType(int position) {
if (items.get(position) instanceof SingleSearchBannerModel)
return BANNER;
if (items.get(position) instanceof SingleSearchType1Model)
return TYPE1;
return -1;
}
public static class BannerViewHolder extends RecyclerView.ViewHolder{
RecyclerView recyclerView;
public BannerViewHolder(View itemView) {
super(itemView);
recyclerView = itemView.findViewById(R.id.recyclerview_banners);
}
}
public static class Type1ViewHolder extends RecyclerView.ViewHolder{
RecyclerView recyclerView;
public Type1ViewHolder(View itemView) {
super(itemView);
recyclerView = itemView.findViewById(R.id.recyclerview_search_type_1);
}
}
}
search_banners.xml and search_type_1.xml have the same code
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerview_banners"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
The above code is not working. I want to know where i went wrong. My main objective is to make an app something like google play store or hotstar (In terms of UI). So I assume they are using single recyclerview and multiple view within it.
Thanks for help.
I know this answer is a bit late but it might still help someone in future. Here is how I achived the goal
public class HeteroActivity extends AppCompatActivity {
private ArrayList<Object> objects = new ArrayList<>();
private static final String TAG = HeteroActivity.class.getSimpleName();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hetero);
RecyclerView recyclerView = findViewById(R.id.recycler_View);
MainAdapter adapter = new MainAdapter(this, getObject());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
}
private ArrayList<Object> getObject() {
DatabaseReference reference = FirebaseDatabase.getInstance().getReference().child("Data");
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
objects.add(getVerticalData(dataSnapshot).get(0));
objects.add(getHorizontalData(dataSnapshot).get(0));
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
return objects;
}
public static ArrayList<SingleVertical> getVerticalData(DataSnapshot dataSnapshot) {
ArrayList<SingleVertical> singleVerticals = new ArrayList<>();
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
singleVerticals.add(new SingleVertical(
snapshot.child("price").getValue(String.class),
snapshot.child("location").getValue(String.class),
snapshot.child("image").getValue(String.class)
));
Log.e(TAG,"Text loaded");
}
return singleVerticals;
}
public static ArrayList<SingleHorizontal> getHorizontalData(DataSnapshot dataSnapshot) {
ArrayList<SingleHorizontal> singleHorizontals = new ArrayList<>();
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
singleHorizontals.add(new SingleHorizontal(
snapshot.child("price").getValue(String.class),
snapshot.child("location").getValue(String.class),
snapshot.child("image").getValue(String.class)
));
Log.e(TAG,"Horizontal data loaded");
}
return singleHorizontals;
}
}
Then in your main Adapter
do this:
private void verticalView(final VerticalViewHolder holder) {
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child("Data");
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
VerticalAdapter adapter1 = new VerticalAdapter(getVerticalData(dataSnapshot), context);
holder.recyclerView.setLayoutManager(new LinearLayoutManager(context));
holder.recyclerView.setAdapter(adapter1);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
private void horizontalView(final HorizontalViewHolder holder) {
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child("Data");
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
HorizontalAdapter adapter = new HorizontalAdapter(getHorizontalData(dataSnapshot),context);
holder.recyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
holder.recyclerView.setAdapter(adapter);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
i am new to android studio , getRef(position) inside onCreateViewHolder
getref is not recognised as command inside onCreateViewHolder
shows error is there any way around to solve the issue,trying to retrieve user info to another page but stuck with this issue
playing with this error for a while please do hep me soon
enter image description here
public class Main2Activity extends AppCompatActivity {
RecyclerView myRecyclerView;
MyAdapter adapter;
List<MyDataGetSet> listData;
FirebaseDatabase FDB;
DatabaseReference DBR;
android.support.v7.widget.Toolbar mToolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
mToolbar=(android.support.v7.widget.Toolbar)findViewById(R.id.register_toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle("All Users");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
myRecyclerView=(RecyclerView)findViewById(R.id.MyReclycler);
myRecyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager LM= new LinearLayoutManager(getApplicationContext());
myRecyclerView.setLayoutManager(LM);
myRecyclerView.setItemAnimator(new DefaultItemAnimator());
myRecyclerView.addItemDecoration(new DividerItemDecoration(getApplicationContext(), LinearLayout.VERTICAL));
listData=new ArrayList<>();
adapter=new MyAdapter(getApplicationContext(),listData);
FDB=FirebaseDatabase.getInstance();
GetDataFirebase();
}
void GetDataFirebase(){
DBR=FDB.getReference("Users");
DBR.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
MyDataGetSet data=dataSnapshot.getValue(MyDataGetSet.class);
listData.add(data);
myRecyclerView.setAdapter(adapter);
}
#Override
public void onChildChanged(DataSnapshot dataSnapshot, String s)
{
for (DataSnapshot childSnapshot: dataSnapshot.getChildren()) {
String visit_user_id = childSnapshot.getKey();
}
}
#Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
#Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{
private Context context;
List<MyDataGetSet> listArray;
public MyAdapter(Context context,List<MyDataGetSet> List){
this.context=context;
this.listArray=List;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.itemview,parent,false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull MyAdapter.MyViewHolder holder, final int position) {
MyDataGetSet data= listArray.get(position);
holder.MyText.setText(data.getUser_name());
holder.MyStatus.setText(data.getUser_status());
Picasso.with(context).load(data.getUser_thumb_image()).into(holder.MyImage);
holder.itemView.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View view)
{
String visit_user_id =getRef().getKey();
Intent profileIntend = new Intent(Main2Activity.this,ProfileActivity.class);
profileIntend.putExtra("visit_user_id",visit_user_id);
startActivity(profileIntend);
}
});
}
public class MyViewHolder extends RecyclerView.ViewHolder{
TextView MyText;
TextView MyStatus;
CircleImageView MyImage;
public MyViewHolder(View itemView) {
super(itemView);
MyText=(TextView)itemView.findViewById(R.id.TextView);
MyStatus=(TextView)itemView.findViewById(R.id.TextStatus);
MyImage=(CircleImageView) itemView.findViewById(R.id.TextImage);
}
}
#Override
public int getItemCount() {
return listArray.size();
}
}
}
To solve this, please change the following line of code:
String visit_user_id =getRef().getKey();
to
MyDataGetSet myDataGetSet = getItem(position);
Now having an object of MyDataGetSet class, you can get the key like this:
String visit_user_id = myDataGetSet.getVisitUserKey();
Assuming you have stored that key inside myDataGetSet object.
I have two arraylist and I want to display the data in both list in the same recyclerview. My code looks like this.
My adapter
class NotificationAdapter extends RecyclerView.Adapter<NotificationViewHolder> {
//..
List<Notification> notifList = new ArrayList<>();
List<AcceptedInvitation> acceptedInvitations = new ArrayList<>();
Context context;
LayoutInflater inflater;
public NotificationAdapter(Context context){
this.context = context;
inflater = LayoutInflater.from(context);
}
public void addNotification(Notification notification){
notifList.add(notification);
notifyDataSetChanged();
notifyItemInserted(notifList.size());
}
public void addAcceptedInvitation(AcceptedInvitation invitation){
acceptedInvitations.add(invitation);
notifyDataSetChanged();
notifyItemInserted(acceptedInvitations.size());
}
#Override
public NotificationViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.rv_notifications, parent, false);
NotificationViewHolder holder = new NotificationViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(final NotificationViewHolder holder, int position) {
String user1= null;
String user2= null;
if(position < notifList.size()){
user1= notifList.get(position).getUserName();
}else {
user2= acceptedInvitations.get(position).getUserName();
}
#Override
public int getItemCount() {
return notifList.size() + acceptedInvitations.size();
}
}
RecyclerView ViewHolder
public class NotificationViewHolder extends RecyclerView.ViewHolder {
//..
TextView userName;
public NotificationViewHolder(View itemView) {
super(itemView);
userName = (TextView) itemView.findViewById(R.id.display_name);
}
}
I have an error in onBindViewHolder() part. I'm using Firebase in retrieving the data by the way.
Main Activity(loadData() is called when the activity starts)
public void loadData(){
//..
final FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference ref = database.getReference().child("users").child(key).child("invitations");
ref.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
Notification notification = dataSnapshot.getValue(Notification.class);
adapter.addNotification(notification);
}
#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) {
}
});
DatabaseReference invitationRef = database.getReference().child("users").child(key).child("acceptedInvitations");
invitationRef.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
AcceptedInvitation acceptedInvitation = dataSnapshot.getValue(AcceptedInvitation.class);
Toast.makeText(getActivity(), dataSnapshot.getValue().toString(), Toast.LENGTH_LONG).show();
adapter.addAcceptedInvitation(acceptedInvitation);
}
#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) {
}
});
}
I can already retrieve the data from invitations and acceptedInvitations json-array, but i have an error when I tried to populate the data from the acceptedInvitations, basically when I call "addAcceptedInvitation(acceptedInvitation)".
Error.
threadid=1: thread exiting with uncaught exception (group=0x41a81c80)
I assume you want to combine the Notification data and AcceptedInvitation data. Please note that when you call two Firebase Database call, the second one will be executed after the first one is finished. So it is okay to use this code below (because if not, this code is risky).
First, remove notifyItemInserted() inside addNotification and addAcceptedInvitation as it is no use if it's called directly after notifyDataSetChanged(). But if you prefer keeping notifyItemInserted() and removing notifyDataSetChanged(), it will be more complicated.
Then lets point out what went wrong. When you call notifyDataSetChanged(), your adapter will refresh all of its item. In your getItemCount(), you mention that your adapter have (notifList.size() + acceptedInvitations.size()). So if you have 3 notifList and 2 acceptedInvitations, your adapter will refresh from its first value to (3+2) fifth value.
Knowing that, the onBindViewHolder will be called with position value from 0 to 4 (0 is first, 4 is fifth). Look at the code:
#Override
public void onBindViewHolder(final NotificationViewHolder holder, int position) {
...
if(position < notifList.size()){
user1 = notifList.get(position).getUserName();
} else {
user2 = acceptedInvitations.get(position).getUserName();
}
}
Notice that when position is 0 or 1 or 2, it is fine because its executing notifList.get(position) and notifList on those index is exist. But when position is 3, its executing acceptedInvitations.get(position) that will triger error because acceptedInvitations only have value on index 0 and 1 not in 3
After understanding that, your code should look like this:
#Override
public void onBindViewHolder(final NotificationViewHolder holder, int position) {
...
if(position < notifList.size()){
user1 = notifList.get(position).getUserName();
} else {
user2 = acceptedInvitations.get(position - notifList.size()).getUserName();
}
}
Hope this help :)
I'm using Firebase with RecyclerView,I'd like to retrieve the child with a specific position to delete it. I know that I should use a query of orderBy, but I need to get a specific child by its position.
Is there a way to do this? I only found a way to get the number of children with getChildrenCount() method of the snapshot, but didn't find something by passing the position value.
Thank you.
protected void populateViewHolder(final ReportViewHolder viewHolder, final Report report, int position) {
viewHolder.txtTitle.setText(report.title);
viewHolder.txtMessage.setText(report.message);
viewHolder.txtDate.setText(report.date);
viewHolder.txtuserName.setText(report.userName);
viewHolder.btnDelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String key = report.key;
Query myTopPostsQuery = mDatabaseReference.child("user-reports/"+userID).orderByKey().equalTo(report.key);
myTopPostsQuery.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
snapshot.getRef().removeValue();
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
mDatabaseReference.child("reports/"+ key).removeValue();
}
});
}
};
I want to use the position of populateViewHolder, to get the child position and then delete its node.
Now I added a field for report called key and using orderByKey().equalTo(report.key); to delete it.
I think you have to add delete and add methods to your adapter class.
public class AllAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
List<Article> articleList = new ArrayList<>();
Context context;
public AllAdapter(Context context){
this.context = context;
}
public void addItem(Article article){
articleList.add(article);
notifyDataSetChanged();
}
public void deleteItem(int position){
articleList.remove(position);
notiftyDateSetChanged(position);
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_post_item,null);
return new ArticleViewHolder(view);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
}
#Override
public int getItemCount() {
return articleList.size();
}
class ArticleViewHolder extends RecyclerView.ViewHolder{
public ArticleViewHolder(View itemView) {
super(itemView);
}
}
}