Question

Im following a tutorial and i have created a database class and a activity class. Here is my activity class:

  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    datasource = new CommentsDataSource(this);
    datasource.open();

    List<Comment> values = datasource.getAllComments();

    // Use the SimpleCursorAdapter to show the
    // elements in a ListView
    ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this,
        android.R.layout.simple_list_item_1, values);
    setListAdapter(adapter);
  }

My db is a bit different but most of the stuff is the same as in tutorial. Comment is just a setter/getter class.
Now the problem is that in my list i want to display comment name but i get “com.example.blabla.Comment@40dca9d0”. I think it is because i am passing the whole comment class to the adapter. How would be the right way to pass the name?

Here is the link to tutorial, i must be missing something because it seems to work there but i dont know what exactly: http://www.vogella.com/articles/AndroidSQLite/article.html#sqliteoverview_sqliteopenhelper

Answer 1

  // Will be used by the ArrayAdapter in the ListView
  @Override
  public String toString() {
    return comment;
  }

Did you make sure you added this to your Comment class?

In java the default implementation of toString() is Class@Hashcode which is what currently yours is showing, hence you need to override the default implementation by returning the comment.

You do not see toString() being called because it says in DOCS(parag2)

However the TextView is referenced, it will be filled with the
toString() of each object in the array. You can add lists or arrays of
custom objects. Override the toString() method of your objects to
determine what text will be displayed for the item in the list.