Why does this intent return a hasmap?

Asked Apr 08 '14 at 13:21

Active Apr 08 '14 at 13:28

Viewed 59 times

I'm trying to send an object from one Activity to another.

@Override
public void onClick(View view) {
//Send the intent to ChallengeViewActivity class
    Intent intent = new Intent(context, ChallengeViewActivity.class);
    intent.putExtra("Challenge", currentChallenge); // currentChallenge is a Challenge object
    context.startActivity(intent);
   }

So over at the receiving class: ChallengeViewActivity:

Intent intent = getIntent();
Challenge challenge = (Challenge)intent.getExtras().getSerializable("Challenge");

This throws a:

ClassCastException: java.util.HashMap cannot be cast to alm.motiv.AlmendeMotivator.models.Challenge

I have no clue why java think I want to cast this to a hash map. If you could give me some insight and a possible solution to this problem I'd be really gratefull!

edited Apr 08 '14 at 13:28

Blackbelt

156,034
29
297
305

asked Apr 08 '14 at 13:21

Kevin Groen

1

are you sure currentChallenge is not an `HashMap`? – Blackbelt Apr 08 '14 at 13:23
Make your Challenge Object Serializale and then you are able to get it, by doing a cast to Challenge. – joao2fast4u Apr 08 '14 at 13:24
3

You should let your Challenge implements Parcelable instead. This is the best way to pass "complex objects" from one Activity to another. – tato.rodrigo Apr 08 '14 at 13:25
The class Challenge implements Serializable. currentChallenge is a Challenge object. Still for some reason I get this error – Kevin Groen Apr 08 '14 at 13:28
I've also read lots about the Serializable vs Parselable debate. Isn't it possible with Serializable? – Kevin Groen Apr 08 '14 at 13:29
@KevinGroen Yes, it is possible with Serilizable – Kunu Apr 08 '14 at 13:30
@KevinGroen It is possible, but not recommended: http://stackoverflow.com/questions/3611843/is-using-serializable-in-android-bad/3612364#3612364 – tato.rodrigo Apr 08 '14 at 13:49

Why does this intent return a hasmap?

0 Answers0