How to pass an object to another activity? If the object already implements an interface (so it can't implement Parcelable)?

Question

I'm trying to pass an Object from one activity to another and I know I should use Parcelable or Serializable but my Object class implements an interface already. Is there any way around this?

Answer 1

Objects can implement multiple interfaces:

class MyClass implements Interface1, Parcelable {
  // Implement each interface
}

Answer 2

I think the right thing is just to use Intent.putExtras() - where you can pass primitive data types + objects of type String, Bundle, Parcelable, Serializable. You are simply using key/value pairs. And after that you can get your data by Intent.getExtras(). Everything is quite simple. Also have a look at this links, they are for bigginers, but really helpful: http://developer.android.com/guide/components/intents-filters.html and http://www.vogella.com/tutorials/AndroidIntent/article.html. If the problem is somewhere deeper - please describe it. Thanks.

Answer 3

Sure! A class can implement multiple interfaces. You'll just need to separate each one with a comma in your class declaration, like this...

public class YourClass implements interface1, interface2, interface3 { 
    //...
}

Answer 4

An object cannot extend more than one class but can implement many interfaces.

Answer 5

Parcelable and `Serializable` are the way but little complex. an easy solution is just use `Gson` or any other JSON library..

in first activity.

String objJson = new Gson().toJson(object);
intent.putExtra("key",objJson);

and in your second activity

YourClass yourClass = new Gson().fromJson(getIntent().getStringExtra("key"),YourClass.class) ;

for Gson library check this link http://www.java2s.com/Code/Jar/g/Downloadgson222jar.htm