MontarBarretaActivity

public class MontarBarretaActivity extends AppCompatActivity implements RecyclerViewOnClickListenerHack {
    private Toolbar mToolbar;
    ArrayList<Barreta> barretas;
    RecyclerView recyclerview;
    MontarBarretaAdapter adapter;

    DbHelper db;


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

        db = DbHelper.getInstance(getApplicationContext());

        mToolbar = (Toolbar) findViewById(R.id.tb_mont);
        mToolbar.setTitle(R.string.minhas_barreta);
        setSupportActionBar(mToolbar);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(false);

        recyclerview = (RecyclerView)findViewById(R.id.rv_montar_barreta);

        barretas = (ArrayList<Barreta>) db.buscar();


       GridLayoutManager RecyclerViewLayoutManager3 = new GridLayoutManager(this,6);

        RecyclerViewLayoutManager3.setReverseLayout(true);

        final int totalSize = barretas.size();
        RecyclerViewLayoutManager3.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                int span;
                span = totalSize % 3;
                if (totalSize < 3) {
                    return 6;
                } else if (span == 0 || (position <= ((totalSize - 1) - span))) {
                    return 2;
                } else if (span == 1) {
                    return 6;
                } else {
                    return 3;
                }
            }
        });


        recyclerview.setLayoutManager(RecyclerViewLayoutManager3);
        Log.d("Jasian", "MontarBarretaActivity no recyclerview.setLayoutManager");

        adapter = new MontarBarretaAdapter(barretas);
        Log.d("Jasian", "MontarBarretaActivity no adapter");
        recyclerview.setAdapter(adapter);
        Log.d("Jasian", "MontarBarretaActivity no recyclerview.setAdapter");
        adapter.setClickListener(this);
        Log.d("Jasian", "MontarBarretaActivity no adapter.setClickListener");

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if(id == android.R.id.home){
            finish();
        }
        return true;
    }

    @Override
    public void onClickListener(View view, int position) {
        Toast.makeText(this, "Medalha: " + barretas.get(position).getNome_barreta()+" Grau: " + barretas.get(position).getGrau_barreta()
                +" precedencia: " + barretas.get(position).getPrecedencia_barreta()
                +" Data: " + barretas.get(position).getData_barreta()+" Id: " + barretas.get(position).getId_barreta(), Toast.LENGTH_SHORT).show();

    }

    @Override
    public void onLongPressClickListener(View view, int position) {

    }


}