檢索Firebase中特定用戶的所有收到郵件

Question

如何從Firebase數據庫檢索所有收到的特定用戶郵件？

Answer 1

FirebaseDatabase database; 
DatabaseReference databaseReference; 
database = FirebaseDatabase.getInstance(); 
databaseReference = database.getReference("firebase_db_name); 

DatabaseReference databaseReference = databaseReference.child("your_user"); 
     databaseReference.addListenerForSingleValueEvent(new ValueEventListener() { 
      @Override 
      public void onDataChange(DataSnapshot dataSnapshot) { 
       if (dataSnapshot != null) { 
        YOUR_OBJECT object = 
           dataSnapshot.getValue(YOUR_OBJECT.class); 
        // todo in object you will get all your msgs 
       } 

      } 

      @Override 
      public void onCancelled(DatabaseError databaseError) { 

      } 
     });