Problem with database data update (Android)

Question

I can’t update the data in the database.

In the database class are the two update and search functions.

public void atualizar(MessageEB dados){
    ContentValues valores = new ContentValues();
    valores.put("data", dados.getData());

    bd.update("dados", valores, "_id = ?", new String[]{"" + dados.getId()});
    Log.i("a", dados.getData());

    bd.close();
}


public MessageEB buscarConfiguracoes() {
    MessageEB messageEB = new MessageEB();
    String sqlSelectTodosLivros = "SELECT * FROM dados";

    Cursor c = bd.rawQuery(sqlSelectTodosLivros, null);

    if(c.moveToNext()) {
        messageEB.setId(c.getLong(0));
        messageEB.setData(c.getString(1));
        Log.i("LOG", "funcao buscar");
    }

    Log.i("LOG", "fora do if "+(c.getString(1)));

    bd.close();
    return messageEB;
}

In the Fragment where you have Edittext is this code inside a:

public void onClick(View v) {


        MessageEB dados = new MessageEB();
        dados.setData(editar.getText().toString());
        BD bd = new BD(getActivity());
        bd.atualizar(dados);

    }

In the die display:

txt = (TextView) view.findViewById(R.id.campoData2);
    BD db = new BD(getActivity());
    String s = db.buscarConfiguracoes().getData();
    txt.setText(s);

When the data goes through the function update the data is changed, I saw it with a Log, but when it goes through the searchConfigurations () the data received is the same as before the change.

Answer 1

You are creating a new instance of MessageEB, gives it the value of editText and then calls the method to update the data.

However, this method requires the value of Id, value that is not "setate" in dados.
You will need to change the code in order to assign the Id of the register it wishes to amend.

public void onClick(View v) {

    MessageEB dados = new MessageEB();
    dados.setData(editar.getText().toString());

    dados.setId = //Não sei onde você o guardou

    BD bd = new BD(getActivity());
    bd.atualizar(dados);
}