Pass HashMap via intent as extra

Question

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!

Possible duplicate of [AndroidRuntime error: Parcel: unable to marshal value](https://stackoverflow.com/questions/3818745/androidruntime-error-parcel-unable-to-marshal-value) — Selvin, Jul 24 '18 at 13:33
this is from stacktrace - `java.lang.RuntimeException: Parcel: unable to marshal value` — yoc, Jul 24 '18 at 13:35

score 0 · Accepted Answer · answered Jul 24 '18 at 13:29

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).

Pass HashMap via intent as extra

1 Answers1