recyclerview duplicating items when calling an activity

package com.giul.profissionaisdeobracivil.adapter;

import android.app.Application; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.net.Uri; import android.support.annotation.NonNull; import android.support.v4.app.ActivityCompat; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView;

import com.bumptech.glide.Glide; import com.giul.profissionaisdeobracivil.R; import com.giul.profissionaisdeobracivil.activity.ActivityPedreiro; import com.giul.profissionaisdeobracivil.activity.LoginActivityPedreiro; import com.giul.profissionaisdeobracivil.model.Pedreiro;

import java.util.IllegalFormatCodePointException; import java.util.List;

import de.hdodenhof.circleimageview.CircleImageView;

public class AdapterPermission extends RecyclerView.Adapter {

private List<Pedreiro> pedreiros;
private Context context;


public AdapterPedreiro(List<Pedreiro> listaPedreiros, Context context){
    this.pedreiros = listaPedreiros;
    this.context = context;
    setHasStableIds(true);


}

@NonNull

@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View itemLista = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.adapter_profissionais,parent, false);


    return new MyViewHolder(itemLista);
}

@Override
public void onBindViewHolder(@NonNull final MyViewHolder holder, int position) {

    final Pedreiro pedreiro = pedreiros.get(position);

    holder.nome.setText(pedreiro.getNome());
    holder.profissao.setText(pedreiro.getProfissao());
    holder.telefoneContato.setImageResource(R.drawable.telefone);
    holder.telefoneContato.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            holder.telefone.setText(pedreiro.getTelefone());
            String number = pedreiro.getTelefone();
            Uri call = Uri.parse("tel:" + number);
            Intent surf = new Intent(Intent.ACTION_DIAL, call);
        surf.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         context.startActivity(surf);


        }

    });

    holder.telefone.setText(pedreiro.getTelefone());


   if (pedreiro.getFoto() != null){
       Uri uri = Uri.parse(pedreiro.getFoto());
       Glide.with( context).load(uri).into(holder.fotoUsuario);
   }else{
       holder.fotoUsuario.setImageResource(R.drawable.padrao);
   }





  /*
    holder.nome.setText("Giuliano");
    holder.profissao.setText("Pedreiro");
    holder.telefone.setText("03195430219");
    holder.telefoneContato.setImageResource(R.drawable.telefone);
    holder.fotoUsuario.setImageResource(R.drawable.padrao);

    holder.telefoneContato.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent callIntent = new Intent(Intent.ACTION_DIAL);
            callIntent.setData(Uri.parse("tel:995430219"));
            view.getContext().startActivity(callIntent);

        }
    });

            */
}

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

public class MyViewHolder extends RecyclerView.ViewHolder{
    TextView nome;
    TextView profissao;
    TextView telefone;
    CircleImageView fotoUsuario;
    ImageView telefoneContato;


    public MyViewHolder(View itemView) {
        super(itemView);
        nome = itemView.findViewById(R.id.textoNomeContato);
        profissao = itemView.findViewById(R.id.textNomeProfissaos);
        telefone = itemView.findViewById(R.id.textNumeroTelefones);
        telefoneContato = itemView.findViewById(R.id.imagemTelefoneContatos);
        fotoUsuario =itemView.findViewById(R.id.imageViewFotoContatos);

    }
}

}

package com.giul.profissionaisdeobracivil.activity;

import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.View; import android.widget.Button;

import com.giul.professionalsdeobracivil.R; import com.giul.profissionaisdeobracivil.activity.ActivityProfissoes; import com.giul.profissionaisdeobracivil.adapter.AdapterPedreiro; import com.giul.professionalsofobracivil.config.FirebaseConfiguration; import com.giul.profissionaisdeobracivil.model.Pedreiro; import com.google.firebase.database.DataSnapshot; import com.google.firebase.database.DatabaseError; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.ValueEventListener;

import java.util.ArrayList;

public class ActivityPedreiro extends AppCompatActivity {     private RecyclerView recyclerViewProfissoes;     private Button button;     private AdapterPedreiro adapterPedreiro;     private ArrayList listPersonals = new ArrayList ;     private DatabaseReference pedreirosRef;     private ValueEventListener valueEventListenerPeders;

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


   // Button button = findViewById(R.id.chamar);
   // button.setOnClickListener(new View.OnClickListener() {
      //  @Override
       // public void onClick(View view) {
        //    Intent intent = new Intent(getApplicationContext(),ActivityProfissoes.class);
         //   startActivity(intent);
       // }
   // });

    RecyclerView    recyclerViewProfissoes = (RecyclerView) findViewById(R.id.recyclerviewProfissoes);
    pedreirosRef = ConfiguraçaoFirebase.getFirebaseDatabase().child("pedreiros");

    //Configurar Adapter
    adapterPedreiro = new AdapterPedreiro(listaPedreiros, getApplication());
   // AdapterPedreiro adapterProfissionais = new AdapterPedreiro();




    //Configurar Recyclerview
    RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
    recyclerViewProfissoes.setLayoutManager(layoutManager);
    recyclerViewProfissoes.setHasFixedSize(true);
    recyclerViewProfissoes.setAdapter(adapterPedreiro);


}
public void onStart(){
    super.onStart();
    recuperarPedreiros();


}public void onPause() {
    super.onPause();

    pedreirosRef.removeEventListener(valueEventListenerPedreiros);
}
public void onStop(){
    super.onStop();
    pedreirosRef.removeEventListener(valueEventListenerPedreiros);

}
public void recuperarPedreiros(){
    valueEventListenerPedreiros = pedreirosRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot dados:dataSnapshot.getChildren()){

                Pedreiro pedreiro = dados.getValue(Pedreiro.class);
                listaPedreiros.add(pedreiro);

            }
            adapterPedreiro.notifyDataSetChanged();

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });

}

}