Recyclerview Onclick() 没有打开所需的活动

Question

I have a chatroom application in which all the chatrooms are displayed in the homepage.When the user clicks on the chatroom it opens a activity where more data about the chatroom is displayed.When I have more than one chatroom and when I click on any of the chatroom it always just opens one specific chatroom and shows it details.For example,If I open chatroom 1 it shows the details of chatroom 2 and if I click on any chatrooms from 1 to 5 it always just shows the data of chatroom one.When the user clicks on the item a documentid id passed to the activity and then in that activity data is retrieved from firebase.

My JAVA CODE for recycleView Activity

public class Homepage extends Fragment  {


    private RecyclerView mRecyclerView;
    private DatabaseReference ref;
    private FirebaseDatabase database;
    private MyAdapter myAdapter;
    String documentid;
    private List<model> list;




    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v =  inflater.inflate(R.layout.fragment_homepage, container, false);


        FloatingActionButton floatingActionButton = v.findViewById(R.id.floatingActionButton);
        mRecyclerView = v.findViewById(R.id.recyclerview);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
        database = FirebaseDatabase.getInstance();
        ref = database.getReference().child("Chatrooms").child("chatroomdata");
        list = new ArrayList<>();

        ref.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                if (snapshot.exists()) {
                    for (DataSnapshot npsnapshot : snapshot.getChildren()) {
                        model l = npsnapshot.getValue(model.class);
                        list.add(l);
                    }
                    myAdapter = new MyAdapter(list);
                    mRecyclerView.setAdapter(myAdapter);
                }

            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {
                Toast.makeText(getContext(), "Error!" + error.getMessage(), Toast.LENGTH_SHORT).show();

            }
        });






        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(getActivity(),createchatroom.class));
            }
        });


        return v;








    }

    public static class model{
       String Image,numberofviewers,numberofusers,adminid,allowviewers,descriptionget,title,type,documentid;

        public String getImage() {
            return Image;
        }

        public model(){

        }

        public void setImage(String image) {
            this.Image = Image;
        }

        public String getNumberofviewers() {
            return numberofviewers;
        }

        public void setNumberofviewers(String numberofviewers) {
            this.numberofviewers = numberofviewers;
        }

        public String getNumberofusers() {
            return numberofusers;
        }

        public void setNumberofusers(String numberofusers) {
            this.numberofusers = numberofusers;
        }

        public String getAdminid() {
            return adminid;
        }

        public void setAdminid(String adminid) {
            this.adminid = adminid;
        }

        public String getAllowviewers() {
            return allowviewers;
        }

        public void setAllowviewers(String allowviewers) {
            this.allowviewers = allowviewers;
        }

        public String getDescriptionget() {
            return descriptionget;
        }

        public void setDescriptionget(String descriptionget) {
            this.descriptionget = descriptionget;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String getType() {
            return type;
        }

        public void setType(String type) {
            this.type = type;
        }

        public String getDocumentid() {
            return documentid;
        }

        public void setDocumentid(String documentid) {
            this.documentid = documentid;
        }

        public model(String Image, String numberofviewers, String numberofusers, String adminid, String allowviewers, String descriptionget, String title, String type, String documentid) {
            this.Image = Image;
            this.numberofviewers = numberofviewers;
            this.numberofusers = numberofusers;
            this.adminid = adminid;
            this.allowviewers = allowviewers;
            this.descriptionget = descriptionget;
            this.title = title;
            this.type = type;
            this.documentid = documentid;
        }
    }

    public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{
        private List<model> list;

        public MyAdapter(List<model> list) {
            this.list = list;
        }

        @NonNull
        @Override
        public MyAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.chatroomrecyclerdesign,parent,false);
            return new ViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull MyAdapter.ViewHolder holder, int position) {
            model ld = list.get(position);
            holder.title.setText(ld.getTitle());
            holder.viewers.setText(ld.getNumberofviewers());
            documentid = ld.getDocumentid();
            String url = ld.getImage();

            if (url.equals("noimage")){
                Glide.with(getActivity()).load(R.drawable.grouppic).into(holder.circleImageView);
            }else {
                Glide.with(getActivity()).load(url).into(holder.circleImageView);
            }



        }

        @Override
        public int getItemCount() {
            return list.size();
        }

        public class ViewHolder extends RecyclerView.ViewHolder{
            private TextView title,viewers;
            CircleImageView circleImageView;

            public ViewHolder(View itemView) {
                super(itemView);
                title=itemView.findViewById(R.id.chatroomtitlerecycler);
                viewers=itemView.findViewById(R.id.chatroomviewersrecycler);
                circleImageView = itemView.findViewById(R.id.chatroomdisplayimagerecycler);

                itemView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent data = new Intent(getActivity(), joinclassroom.class);
                        data.putExtra("documentid",documentid);
                        startActivity(data);
                    }
                });


            }
        }
    }





}

The activity that shows the details of the chatroom.

public class joinclassroom extends AppCompatActivity {

    ImageView imageView;
    CircleImageView circleImageView;
    TextView title,description,users,viewers,type,full;
    Button join,spectate;
    String imageurl;
    int numberofchatters;
    String password,nameString,imageString;
    DatabaseReference reference;
    int getNumberofchatters = 0;
    int numberofviewers;
    String clickSpectate = "spectate";
    DatabaseReference usersnumberchatroom;
    int kitneusers = 0;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_joinclassroom);


        join = findViewById(R.id.joinclassroombtn);
        full = findViewById(R.id.full);
        circleImageView = findViewById(R.id.groupdisplayimage);
        title = findViewById(R.id.title);
        final String user_id = FirebaseAuth.getInstance().getCurrentUser().getUid();
        description = findViewById(R.id.description);
        users = findViewById(R.id.numberofusers);
        viewers = findViewById(R.id.numberofviewers);
        type = findViewById(R.id.type);
        spectate = findViewById(R.id.spectate);

        final ProgressDialog progressDialog =  new ProgressDialog(this);
        progressDialog.setMessage("Joining");
        final DatabaseReference user = FirebaseDatabase.getInstance().getReference().child("Users").child("profiledata").child(user_id);





        user.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                imageString = snapshot.child("imageUrl").getValue().toString();
                nameString = snapshot.child("Full name").getValue().toString();

            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });


        imageView = findViewById(R.id.close);
        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(getApplicationContext(), MainActivity.class));
            }
        });

        Intent i = getIntent();
        final String s = i.getStringExtra("documentid");




        usersnumberchatroom = FirebaseDatabase.getInstance().getReference().child("Chatrooms").child("chatroomdata");
usersnumberchatroom.child(s).addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot snapshot) {
        String kitneusers1 = snapshot.child("number of users").getValue().toString();
        kitneusers = Integer.parseInt(kitneusers1);
    }

    @Override
    public void onCancelled(@NonNull DatabaseError error) {

    }
});
        spectate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent spectate = new Intent(joinclassroom.this,chatroom.class);
                spectate.putExtra("spectate",clickSpectate);
                startActivity(spectate);

                numberofviewers++;
                reference.child("numberofviewers").setValue(String.valueOf(numberofviewers));
            }
        });

        reference = FirebaseDatabase.getInstance().getReference().child("Chatrooms").child("chatroomdata").child(s);

        reference.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {

                title.setText(snapshot.child("title").getValue().toString());
                description.setText(snapshot.child("descriptionget").getValue().toString());
                users.setText(snapshot.child("number of users").getValue().toString() + "/10");
                viewers.setText(snapshot.child("numberofviewers").getValue().toString());
                type.setText(snapshot.child("type").getValue().toString());

                if (snapshot.child("allowviewers").getValue().toString().equals("dontallowviewers")) {
                    spectate.setVisibility(View.GONE);
                    viewers.setVisibility(View.GONE);

                } else {
                    spectate.setVisibility(View.VISIBLE);
                    spectate.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            startActivity(new Intent(getApplicationContext(), chatroom.class));
                        }
                    });
                }

                if (snapshot.child("type").getValue().toString().equals("Private")) {
                    password = snapshot.child("password").getValue().toString();
                    final Bundle bundle = new Bundle();
                    bundle.putString("password", password);
                    bundle.putString("chatroomidprivate", s);

                    join.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            progressDialog.show();
                            DatabaseReference reference1 = FirebaseDatabase.getInstance().getReference().child("Chatrooms").child("members").child(s);
                            Map<String, Object> memberadd = new HashMap<>();
                            memberadd.put("name", nameString);
                            memberadd.put("Image", imageString);
                            memberadd.put("id", FirebaseAuth.getInstance().getCurrentUser().getUid());

                            reference1.child(user_id).setValue(memberadd).addOnSuccessListener(new OnSuccessListener<Void>() {
                                @Override
                                public void onSuccess(Void aVoid) {
                                    getNumberofchatters++;
                                    reference.child("numberofusers").setValue(String.valueOf(getNumberofchatters));
                                    progressDialog.dismiss();
                                    bottomsheet bottomsheet = new bottomsheet();
                                    bottomsheet.setArguments(bundle);
                                    bottomsheet.show(getSupportFragmentManager(), "bottomsheet");
                                }
                            });
                        }
                    });

                } else {
                    join.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {

                            DatabaseReference reference1 = FirebaseDatabase.getInstance().getReference().child("Chatrooms").child("members").child(s);
                            Map<String, Object> memberadd = new HashMap<>();
                            memberadd.put("name", nameString);
                            memberadd.put("Image", imageString);
                            memberadd.put("id", FirebaseAuth.getInstance().getCurrentUser().getUid());

                            reference1.child(user_id).setValue(memberadd).addOnSuccessListener(new OnSuccessListener<Void>() {
                                @Override
                                public void onSuccess(Void aVoid) {
                                    getNumberofchatters++;
                                    reference.child("numberofusers").setValue(String.valueOf(getNumberofchatters));
                                    progressDialog.dismiss();

                                    Intent intent = new Intent(joinclassroom.this, chatroom.class);
                                    intent.putExtra("chatroomidpublic", s);
                                    startActivity(intent);
                                }
                            });

                        }
                    });
                }
                numberofchatters = Integer.parseInt(snapshot.child("number of users").getValue().toString());

                if (numberofchatters >= 10) {
                    join.setVisibility(View.GONE);
                    full.setVisibility(View.VISIBLE);
                } else {
                    full.setVisibility(View.GONE);
                    join.setVisibility(View.VISIBLE);

                }
                imageurl = snapshot.child("Image").getValue().toString();

                if (imageurl.equals("noimage")) {

                    Glide.with(getApplicationContext()).load(R.drawable.grouppic).into(circleImageView);

                } else {
                    Glide.with(getApplicationContext()).load(imageurl).into(circleImageView);
                }
            }


            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });
    }
}

Answer 1

Modified here in your code

 itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent data = new Intent(getActivity(), joinclassroom.class); data.putExtra("documentid",documentid); getActivity().startActivity(data); } });