Reading child in Firebase Database

Question

I want to access child item in users according to particular key of child node and I have passed that key in my function getcount() but when I am accessing the user with that referal key it is showing up com.google.firebase.database.DatabaseException: Failed to convert value of type java.lang.Long to String.

I have used the following code but it is not working properly

  private void getCount(final String referalKey) {
    DatabaseReference myref=FirebaseDatabase.getInstance().getReference().child("users").child(referalKey);
    myref.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
            user u=dataSnapshot.getValue(user.class);
            Toast.makeText(Home.this,u.getCount(),Toast.LENGTH_SHORT).show();

        }

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

        }
    });



} 

my user model class

public class user {
      public String name;
      public String phone;
      public String refphone;
      public String address;
      public String count;

    public user() {
        // Default constructor required for calls to DataSnapshot.getValue(User.class)
    }

    public String getCount() {
        return count;
    }

    public void setCount(String count) {
        this.count = count;
    }

    public user(String name, String phone, String refphone, String address, String count) {
        this.name = name;
        this.phone = phone;
        this.refphone = refphone;
        this.address = address;
        this.count = count;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public void setRefphone(String refphone) {
        this.refphone = refphone;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getName() {
        return name;
    }

    public String getPhone() {
        return phone;
    }

    public String getRefphone() {
        return refphone;
    }

    public String getAddress() {
        return address;
    }
}

Answer 1

Change your phone and count property from String to long as your database contain it as long

public class user {
    public String name;
    public long phone;
    public String refphone;
    public String address;
    public long count;

    public user() {
        // Default constructor required for calls to DataSnapshot.getValue(User.class)
    }

    public long getCount() {
        return count;
    }

    public void setCount(long count) {
        this.count = count;
    }

    public user(String name, long phone, String refphone, String address, long count) {
        this.name = name;
        this.phone = phone;
        this.refphone = refphone;
        this.address = address;
        this.count = count;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPhone(long phone) {
        this.phone = phone;
    }

    public void setRefphone(String refphone) {
        this.refphone = refphone;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getName() {
        return name;
    }

    public long getPhone() {
        return phone;
    }

    public String getRefphone() {
        return refphone;
    }

    public String getAddress() {
        return address;
    }
}

Answer 2

As i can see in your database Screenshot your count and phone number in one of the document it's in " and on other it's long. Change it manually