How to pass multiple ArrayList to another activity

Question

I try to pass three arrays to other activity, but for whatever reason it seems like only one last array passed from the parent activity goes to the child and the rest dont Here is the parent activity code:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_category_list_items);

    Intent intent = getIntent();
    categoryTitle = intent.getStringExtra(categoryName);

    if(Arrays.asList(FragmentHelper.Days).contains(categoryTitle)) {
        header.setText("Start the workout");
        addButton.setText("Start");
        addButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Context context = v.getContext();
                Intent intent = new Intent(context, ItemDetailActivityCopy.class);
                Bundle extras = new Bundle();
                List<ListItem> items = listManager.getList(categoryTitle);
                ArrayList<String> itemName = new ArrayList<>();
                ArrayList<String> itemTime = new ArrayList<>();
                ArrayList<String> itemNumberOfSets = new ArrayList<>();

                for(int i = 0; i < listManager.getNumberOfItemsCopy(categoryTitle); i++) {
                    itemName.add(items.get(i).getDescription());
                    itemTime.add(String.valueOf(items.get(i).getTime()));
                    itemNumberOfSets.add(String.valueOf(items.get(i).getNumberOfSets()));
                }
                Log.d("Title:", itemName.toString());
                Log.d("Time:", itemTime.toString());
                Log.d("Num of sets:", itemNumberOfSets.toString());
                extras.putStringArrayList(ItemDetailActivityCopy.itemName.toString(), itemName);
                extras.putStringArrayList(ItemDetailActivityCopy.itemTime.toString(), itemTime);
                extras.putStringArrayList(ItemDetailActivityCopy.itemNumberOfSets.toString(), itemNumberOfSets);
                intent.putExtras(extras);
                context.startActivity(intent);
            }
        });
    }
}

Possible duplicate of [How to pass an ArrayList to another activity and convert it into double](http://stackoverflow.com/questions/22640669/how-to-pass-an-arrayliststring-to-another-activity-and-convert-it-into-double) — Asif Patel, Apr 10 '17 at 21:00
"the rest dont" -- how have you determined this? Where is your code for retrieving values from the extras? Note that the keys to your extras are rather strange. Usually, we use constants, not `toString()` of some other object. — CommonsWare, Apr 10 '17 at 21:01
Possible duplicate of [Passing and ArrayList through intent](http://stackoverflow.com/questions/41014704/passing-and-arraylistservice-through-intent) — Saurabh Bhandari, Apr 11 '17 at 05:08

Narendra Sorathiya · Answer 1 · 2017-04-10T21:00:28.640

0

pass ArrayList<String> from one Activity to other Activity,using putStringArrayListExtra

Intent intent = new Intent(context, ItemDetailActivityCopy.class);
intent.putStringArrayListExtra("LIST_ITEMS", itemName);
startActivity(intent);

get ArrayList<String> from other Activity,

ArrayList<String> listItems;
listItems = getIntent().getStringArrayListExtra("LIST_ITEMS");

edited Apr 10 '17 at 21:00

answered Apr 10 '17 at 20:58

Narendra Sorathiya

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Please explain, **in detail**, how this would solve the problem. – CommonsWare Apr 10 '17 at 20:59
I have explained in detail, use method of my answer to send & get ArrayList of String from one Activity to other – Narendra Sorathiya Apr 10 '17 at 21:06
yep, it works, but i dont get why it did not when i Bundle extras = new Bundle(); – Oleh Apr 10 '17 at 21:21
one more thing, how can i pass a Long array instead of string? – Oleh Apr 10 '17 at 21:36
`putExtra` method with `long[]` value – Narendra Sorathiya Apr 10 '17 at 21:42
if i do intent.putExtra("itemTime", itemTime); Then in child long [] time; time = intent.getLongArrayExtra("itemTime"); I get null – Oleh Apr 10 '17 at 22:04
What is type of `itemTime`? if it's different then it will return null – Ioane Sharvadze Apr 10 '17 at 22:27

How to pass multiple ArrayList to another activity

1 Answers1