I think Dave's code can be slightly changed to have the desired affect
and still maintain constructor semantics
public class MyFragment extends Fragment {
public MyFragment() {}
public MyFragment(int index) {
// MyFragment f = new MyFragment();
Bundle args = new Bundle();
args.add("index", index);
this.setArguments(args);
}
Notice the commented out instantiation and uses the "this.setArguments()".
Satya
On Mon, Feb 14, 2011 at 9:47 AM, Kostya Vasilyev <kmans...@gmail.com> wrote:
> The code fragment below creates two instances of MyFragment, which is
> probably not what you intended.
>
> One is created by the new operator outside the constructor (someone doing
> "new MyFragment(myIndexValue)") and another instance inside the constructor
> ("f = new MyFragment"). The latter one, with the index value, is not
> returned to the caller in any way, it just gets dropped on the floor.
>
> What you probably want is a factory method, like this:
>
> public class MyFragment extends Fragment {
> public static MyFragment createMyFragment(int index) {
> MyFragment f = new MyFragment();
> Bundle args = new Bundle();
> args.putInt("index", index);
> f.setArguments(args);
> return f;
> }
> }
>
> which is remarkably similar to "public static DetailsFragment
> newInstance(..)" in Dianne's blog post, see 3rd code example from the top.
>
> Now clients of MyFragment can do "MyFragment f =
> MyFragment.createMyFragment(myIndexValue);"
>
> -- Kostya
>
> 14.02.2011 17:20, davemac пишет:
>
> public class MyFragment extends Fragment {
> public MyFragment() {}
> public MyFragment(int index) {
> MyFragment f = new MyFragment();
> Bundle args = new Bundle();
> args.add("index", index);
> f.setArguments(args);
> }
> [ ... ]
> }
> Now the clients of MyFragment can instantiate one with arguments much
> easier, yet I still get the recoverability because I do the right
> things behind the scenes.
>
>
> --
> Kostya Vasilyev -- http://kmansoft.wordpress.com
>
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--
Satya Komatineni
http://www.satyakomatineni.com
http://www.androidbook.com
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