There are two things you must pay attention to:
1. Your class must implements Parcelable with it's CREATOR.
2. In the receiver activity, you should use getParcelable method to get your
Parcelable object from the Extras bundle.
2010/4/20 Arpit <robin.ca...@gmail.com>
> This works if I change the class Services from being Parceable to
> Serializable it works... I am not sure why... but between Activity
> when I am sending Serialized data it works but not if I send parceable
> data.
>
> Regards,
> Arpit
>
> On Apr 20, 10:31 am, Arpit <robin.ca...@gmail.com> wrote:
> > Similar problem but this doesn't work. Following steps exists in my
> > apps and still not able to send data part of Intent (putExtras) from
> > one activity to another:
> >
> > - Activity A is of type ListActivity showing some buttons.
> > - Any button click shows a Login screen (AlertDialog).
> > - onCreateDialog is implemented and I have two buttons on the
> > AlertDialog, Ok & Cancel, both having listener for onClick event. I
> > realize that if I try to start activity within onClick event of OK
> > BUTTON, the activity wont start.
> > - So I implemented onDismissListener and started activity from here.
> > - Now I call Activity B and passing new Intent where I have put extra
> > (Parcelable object)
> >
> > In activity B the parcelable object comes empty... No info in it.
> >
> > Code below:
> >
> > Activity A (HomeActivity)
> >
> > @Override
> > public void onDismiss(DialogInterface
> dialog) {
> > try{
> > HomeActivity home =
> (HomeActivity)
> > ((AlertDialog)dialog).getOwnerActivity();
> > Intent oldIntent =
> home.getIntent();
> > oldIntent.setClass(home,
> ServiceListActivity.class);
> >
> home.startActivityForResult(oldIntent,0);
> > }catch(Exception e){
> >
> Toast.makeText(HomeActivity.this, R.string.error_occured,
> > Toast.LENGTH_LONG).show();
> > }
> > }
> >
> > Activity B (ServiceListActivity)
> >
> > public void onCreate(Bundle savedInstanceState){
> > try{
> > super.onCreate(savedInstanceState);
> > setContentView(R.layout.middle_man);
> > Intent i = super.getIntent();
> > Bundle b = i.getExtras();
> > Iterator<String> iterator =
> b.keySet().iterator();
> > Services a = null;
> > while(iterator.hasNext()){
> > a =
> (Services)b.getParcelable(iterator.next());
> > }
> > Services s =
> (Services)b.get(ServicesConstants.SERVICE_SELECTED);
> > ...
> > ...
> >
> > Both 'a' and 's' comes null. They are type object "Services" which is
> > Parceable in nature.
> >
> > Regards,
> > Arpit
> >
> > On Apr 20, 1:50 am, "~ TreKing" <treking...@gmail.com> wrote:
> >
> >
> >
> >
> >
> > > On Mon, Apr 19, 2010 at 1:24 AM, Ke Wu <kerl....@gmail.com> wrote:
> > > > I dont know what the Intent exactly do when I use putExtra to pass in
> an
> > > > ArrayList<MyClass> object.
> >
> > > Did you read the documentation on Intents? Specifically this:
> http://developer.android.com/intl/fr/reference/android/content/Intent...,
> > > java.util.ArrayList<? extends android.os.Parcelable>)
> >
> > > > I guess MyClass need to implement Parcelable interface, so I just did
> it.
> > > > But still, it does not work.
> >
> > > You guess right. If it does not work, you should explain what doesn't
> work.
> > > Just saying "it does not work" is useless to someone trying to help
> you.
> >
> > > > Maybe I need to create a Bundle and then use Bundle'
> putParcelableArrayList
> > > > method to put my ArrayList<MyClass> object in, and then pass this
> bundle as
> > > > parameter of putExtra to the intent.
> >
> > > No.
> >
> > > > So crazy!
> >
> > > Not really!
> >
> > > > I am lazy
> >
> > > Then you should not being doing Android development ... or any kind of
> > > programming for that matter.
> >
> > > > , I just want to pass an ArrayList<MyClass> object simply, is there a
> > > > simple way??
> >
> > > > Any suggestion would be greatly appreciated!
> >
> > > See the link I posted.
> >
> > > On Mon, Apr 19, 2010 at 3:23 AM, Kumar Bibek <coomar....@gmail.com>
> wrote:
> > > > However, a cheap workaround would be to have this arraylist as a
> static
> > > > variable of your source activity. This way, you can access this Array
> List
> > > > from your destination activity
> >
> > > Except that by doing this, you have to make sure the list is actually
> valid.
> > > If you start Activity A, fill the list, start Activity B, press Home,
> wait a
> > > while, come back to your app, your app may have been killed since you
> > > started it, the list will be empty, but you will be back in Activity B.
> If
> > > you don't validate that list and save and restore it somehow, you will
> run
> > > into trouble trying to access the empty (or null) list.
> >
> > >
> -------------------------------------------------------------------------------------------------
> > > TreKing - Chicago transit tracking app for Android-powered
> deviceshttp://sites.google.com/site/rezmobileapps/treking
> >
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