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androidandroid-activity

Pass HashMap<Integer, JSONObject> via intent as extra

I tried to pass an HashMap via intent from fragment to activity, but without success. this is my code: 

    private HashMap<Integer, JSONObject> myData;

    Intent intent = new Intent(this.getActivity(),MyActivity.class);
    intent.putExtra("myMap", myData);
    startActivity(intent);

and I got a runtimeExeption:

    java.lang.RuntimeException: Parcel: unable to marshal value

I would be happy if someone can help me with that! I need a way to resolve it, I know that JSONObject is not Serializable. The value is not a custom object, therfore I can't implement Serializable there. Thank a lot!

Solution

  • Instead of 

    HashMap<Integer, JSONObject> myData

    you should use 

    HashMap<Integer, String> myData

    And add the items as Strings instead of JSONObject:

    myData.put(0, myJsonObject.toString());

    then, on your second activity, you create the JSON when needed:

    new JSONObject(myData.get(0));

    The reason:

    JSONObject is not serializable by default but String is (notice it implements Serializable).