I have an ArrayList object like this:
ArrayList<HashMap<String, String>> data = new ArrayList<HashMap<String, String>>();
How to iterate through the list? I want to display the value in a TextView which comes from the data of ArrayList object.
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2 Answers
Simplest is to iterate over all the HashMaps in the ArrayList and then iterate over all the keys in the Map:
TextView view = (TextView) view.findViewById(R.id.view);
for (HashMap<String, String> map : data)
for (Entry<String, String> entry : map.entrySet())
view.append(entry.getKey() + " => " + entry.getValue());
2 Comments
Ben van Gompel
For the 2nd iteration I personally prefer to iterate of the map entries, instead of the keys.
for (Entry<String, String> entry : map.entrySet()). That way you already both the key and the value, you don't need another map lookup.
dacwe
@BenvanGompel: Good point, depends on your use case, but updated! :)
for(HashMap<String, String> map : data){
... deal with map...
}
