Suche Daten aus Firebase-Datenbank in Android

Question

Hallo Ich versuche, Daten aus Firebase-Datenbank zu suchen. Aber ich sehe keine Option für Suchdaten von Firebase. In meiner Firebase-Datenbank sind Adresse, Stadt und Handynummer vorhanden. Ich möchte Daten von diesem suchen, wenn ich die letzte Ziffer der Handynummer gebe. Ich möchte Ergebnis diese Handynummer bekommen.

ist hier mein Code

floating_search_view_recruiter = (FloatingSearchView) findViewById(R.id.floating_search_view_recruiter); 
     floating_search_view_recruiter.setSearchHint("Search Recruiter.."); 
     floating_search_view_recruiter.attachNavigationDrawerToMenuButton(drawer); 
     floating_search_view_recruiter.setOnMenuItemClickListener(new FloatingSearchView.OnMenuItemClickListener() { 
      @Override 
      public void onActionMenuItemSelected(MenuItem item) { 
       int id = item.getItemId(); 
       if (id == R.id.action_filter) { 
        aleartDialogFilter(); 
       } 
      } 
     }); 

     fab_recyclerView.setVisibility(View.GONE); 
     floating_search_view_recruiter.setOnQueryChangeListener(new FloatingSearchView.OnQueryChangeListener() { 
      @Override 
      public void onSearchTextChanged(String oldQuery, String newQuery) { 
       //recruiterAdapter.getFilter().filter(newQuery); 
       mRef.orderByChild("city") 
         .startAt(newQuery) 
         .endAt(newQuery + "\uf8ff"); 

       mRef.child("city").addValueEventListener(new ValueEventListener() { 
        @Override 
        public void onDataChange(DataSnapshot dataSnapshot) { 

        } 

        @Override 
        public void onCancelled(DatabaseError databaseError) { 

        } 
       }); 
      } 
     }); 

Answer 1

dieses Github-Repository weitere Beispiele vertretend für enter link description here

mDatabase = FirebaseDatabase.getInstance().getReference().child("appointment"); 

            Query query = mDatabase.orderByChild("patient").equalTo(restoredText.toString()); 

            query.addValueEventListener(new ValueEventListener() { 

                @Override 

                public void onDataChange(DataSnapshot dataSnapshot) { 


                    if (dataSnapshot != null || dataSnapshot.getChildrenCount() > 0) { 

                        collectPhoneNumbers((Map<String, Object>) dataSnapshot.getValue()); 

                    } 

                } 


                @Override 

                public void onCancelled(DatabaseError databaseError) { 

                    // Failed to read value 

                    Toast.makeText(getApplicationContext(), "Failed to read value." + databaseError.toException(), Toast.LENGTH_LONG).show(); 

                } 

            }); 


    private void collectPhoneNumbers(Map<String, Object> users) { 


        if (users != null && !users.isEmpty()) { 

            contacts.clear(); 

            contacts.add(new Appointment("<b>Date</b>", "<b>Time</b>", "<b>Doctor Name</b>", "<b>Patient Name</b>")); 

            //iterate through each user, ignoring their UID 

            for (Map.Entry<String, Object> entry : users.entrySet()) { 

                //Get user map 

                Map singleUser = (Map) entry.getValue(); 

                //Get phone field and append to list 

                String date = (String) singleUser.get("date"); 

                String time = (String) singleUser.get("time"); 

                String doctor = (String) singleUser.get("doctor"); 

                String patient = (String) singleUser.get("patient"); 

                contacts.add(new Appointment(date, time, doctor, patient)); 

// Toast.makeText(getApplicationContext(), "Date: " + date + ", Time:" + time + ", Doctor:" + doctor + ", Patient:" + patient, Toast.LENGTH_LONG).show(); 

                adapter.notifyDataSetChanged(); 

            } 

        } 

    }