ListaAlunosAdapter.java

public class ListaAlunosAdapter extends BaseAdapter {
    private final List<Aluno> alunos = new ArrayList<>();
    private Context contexto;

    public ListaAlunosAdapter(Context contexto) {
        this.contexto = contexto;
    }


    @Override
    public int getCount() {
        int size = alunos.size();
        return size;
    }

    @Override
    public Aluno getItem(int position) {
        return alunos.get(position);
    }

    @Override
    public long getItemId(int position) {
        return alunos.get(position).getId();
    }

    @Override
    public View getView(int position, View convertView, ViewGroup groupp) {
        View layout = LayoutInflater.from(this.contexto).inflate(R.layout.item_aluno,groupp, false);
        Aluno aluno = alunos.get(position);
        TextView tvn = layout.findViewById(R.id.item_aluno_nome);
        TextView tvt = layout.findViewById(R.id.item_aluno_telefone);
        tvn.setText(aluno.getNome());
        tvt.setText(aluno.getTelefone());

        return layout;
    }

    public void clear() {
        alunos.clear();
        notifyDataSetChanged();
    }

    public void addAll(List<Aluno> alunos) {
        alunos.addAll(alunos);
        notifyDataSetChanged();
    }

    public void remove(Aluno a) {
        alunos.remove(a);
        notifyDataSetChanged();
    }
}