CODEWITHSUNDEEP
javaandroidmultimap
emen
emen

Reputation: 6318

Remove value duplicates in Multimap

I have a Multimap and I need to display the output like this:

key (value count)

For example, I have these data inside the Multimap:

{Entertainment=[5],
Food=[2, 2, 2],
Products=[11],
Health & Beauty=[3]}

The number in the array is the ID of related keys. What I would want it to output is as follows:

Entertainment (1)
Food (3)
Products (1)
Health & Beauty (1)

Of course, I want the ID to be carried along as well.

This is what I did so far,

Multimap<String, String> map = ArrayListMultimap.create();

for (int i = 0; i < response.getMerchants().size(); i++) {

    //hmm.setCategory_id(response.getMerchants().get(i).getCategory_id());
    //hmm.setCategory_name(response.getMerchants().get(i).getCategory_name());
    //hmm.setCategory_count(123); // FIXME

    map.put(response.getMerchants().get(i).getCategory_name(),
    response.getMerchants().get(i).getCategory_id());

    //arrCategory.add(hmm);
}

for (String key : map.keySet()) {
    int count = map.get(key).size();

    Log.d(TAG, "count= "+count);
}

Just so you know, the value will be put in an array an passed to the BaseAdapter to populate a ListView. Or is there any other way to do this besides using Multimap? I've used HashMap<String, String> before, but it removes duplicate.

If anything unclear, please let me know. I've done thinking about it.

Upvotes: 0

Views: 882

Answers (1)

emen
emen

Reputation: 6318

I managed to solve this problem by using HashMap instead.

In a for loop,

Map map = new HashMap();

...

map.put(response.getMerchants().get(i).getCategory_name(),
   response.getMerchants().get(i).getCategory_id());

...

To put it in my adapter:

for (Object o : map.entrySet()) {
    Map.Entry entry = (Map.Entry) o;
    HomeMerchantsModel hms = new HomeMerchantsModel();
    hms.setCategory_id(String.valueOf(entry.getValue()));
    hms.setCategory_name(String.valueOf(entry.getKey()));

    arrCategory.add(hms);
}

Since HashMap stores unique key-value, this is useful. Now moving on to calculate the counts.

Upvotes: 1

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