Pass multidimensional ArrayList of LatLng through intent

Question

I am trying to pass an ArrayList<ArrayList<LatLng>> from one intent to another using putParcelableArrayListExtra () but for some reason it doesn't like my list. I define the array list with ArrayList<ArrayList<LatLng>> listOfStrokes = new ArrayList<>(); and I am trying to pass it with

ArrayList<ArrayList<LatLng>> listOfStrokes = new ArrayList<>();

Intent intent = new Intent(this, CreateFarm.class);

intent.putParcelableArrayListExtra("listOfStrokes", listOfStrokes);

but I am getting a

Error:(383, 65) error: incompatible types: ArrayList> cannot be converted to ArrayList

error. Is there a way to pass this object?

It is my multidimensional ArrayList. I'll reformat my question to make that more clear — Ryan Newman, Sep 23 '15 at 15:53
Shouldn't it be like ArrayList> listOfStrokes = new ArrayList(); .. Android ain't Java8, you have to specify the complete names... — We are Borg, Sep 23 '15 at 15:56
When I put that Android Studio gives me a warning that it is redundant and that it doesn't need to be there. I can add to the list no problem it is just passing it — Ryan Newman, Sep 23 '15 at 15:57
Your `LatLng` might have to implement `Parcelable`. This might help: http://stackoverflow.com/questions/18050030/intent-putextra-arraylistnamevaluepair — schtever, Sep 23 '15 at 15:57
putParcelableArrayListExtra expects an array list of ArrayList extends Parcelable> object but your giving it an Arraylist of ArrayList of ArrayList does not implement Parcelable. can you just try putExtra? That will take an arraylist of arraylist. — bsautner, Sep 23 '15 at 18:00

score 0 · Answer 1 · answered Sep 23 '15 at 18:07

First - consider using Guava tables to avoid a List of Lists pattern.

putParcelableArrayListExtra expects a List of objects that implements Parcelable. ArrayList does not. Arraylist implements Serializable, so the below will work.

ArrayList<ArrayList<LatLng>> listOfStrokes = new ArrayList<>();

Intent intent = new Intent(this, CreateFarm.class);

intent.putExtra("listOfStrokes", listOfStrokes);

Pass multidimensional ArrayList of LatLng through intent

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