Question

I have class:

public class Nomenklatura implements Serializable {
    ArrayList<String> data = new ArrayList<String>();
    ArrayList<String> data1 = new ArrayList<String>();
    ArrayList<String> data2 = new ArrayList<String>(6);
}

And Activity:

public class Smena extends Activity {
    public Nomenklatura Asortiment;
    ArrayList<String> data = new ArrayList<String>();
    ArrayList<String> data1 = new ArrayList<String>();
    ArrayList<String> data2 = new ArrayList<String>(6);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.smena); 
        Intent i= getIntent();

        Asortiment = (Nomenklatura) i.getExtras().getSerializable("Nomenklatura");
        ArrayList<String> data = Asortiment.data;
        ArrayList<String> data1 = Asortiment.data1;
        ArrayList<String> data2= Asortiment.data2;
    }
}

In debugger, before ArrayList<String> data =Asortiment.data;I see data in Asortiment.data, but after this operation, ArrayList<String> data is empty. I can’t understand why.

Answer 1

Your onCreate method is making new local variables, instead of assigning to the member variables. If you write data = Asortiment.data; without the preceding ArrayList<String> declaration (and the same on the following two lines), it will work!