DataSekretarisActivity,java

package tgs.app.absensi.Sekretaris;

import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import tgs.app.absensi.R;
import tgs.app.absensi.SekretarisAdapter;
import tgs.app.absensi.model.Sekretaris;
import tgs.app.absensi.retrofit.Api;
import tgs.app.absensi.retrofit.ApiInterface;

public class DataSekretarisActivity extends AppCompatActivity {

    SwipeRefreshLayout swipe_refresh;
    RecyclerView recyclerView;

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

        swipe_refresh = findViewById(R.id.swipe_refresh);
        recyclerView = findViewById(R.id.rc_data);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setHasFixedSize(true);

        DataSekretaris();
        swipe_refresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                swipe_refresh.setRefreshing(true);
                DataSekretaris();
            }
        });


        getSupportActionBar().setTitle("Data Absen Siswa");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

    private void DataSekretaris(){
        ApiInterface apiInterface = Api.getUrl().create(ApiInterface.class);
        Call<Sekretaris> call = apiInterface.getSekretarisCall();
        call.enqueue(new Callback<Sekretaris>() {
            @Override
            public void onResponse(Call<Sekretaris> call, Response<Sekretaris> response) {
                swipe_refresh.setRefreshing(false);
                List<Sekretaris.Siswa> detailSiswa = response.body().getReadSiswa();
                List<Sekretaris.Kelas> detailKelas = response.body().getReadKelas();
                recyclerView.setAdapter(new SekretarisAdapter(detailSiswa, detailKelas));
            }

            @Override
            public void onFailure(Call<Sekretaris> call, Throwable t) {

            }
        });
    }

    @Override
    public boolean onSupportNavigateUp() {
        finish();
        return super.onSupportNavigateUp();
    }
}