java.lang.Indexoutofboundsexception: Invalid index 4, size is 4

Question

I’m not sure what’s going on, when I long click on a list item, it sometimes works normally (open a screen where it shows the user the registered information, allowing them to change it), sometimes the app stops and closes and sometimes the app stops and opens a registration page setting the values in the respective fields.

Code that opens the details screen of the registered item:

cDAO.abrirBanco();
contatoArray = cDAO.consultar();

lvContatos.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    @Override
    public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
        Contato c = contatoArray.get(i);

        Intent it = new Intent(MainActivity.this, TelaDetalhe.class);
        it.putExtra("contato", c);
        startActivity(it);

        return true;
    }
});

I pick up the sent object like this:

final Contato c = (Contato) getIntent().getSerializableExtra("contato");

If I need to put more parts of the code

Answer 1

Error indicates you are trying to use an index outside the range.

In this case you are using index 4 while the array only has 4 items. Note that index numbering starts at 0.

The reason for this to happen is that the array contatoArray has fewer items than the Adapter-managed array.

Only with the information available in the question can I not add anything else.