Can we set an ArrayList containing HashMap into an ArrayAdapter?
I'm using:
ArrayList<HashMap<String,String>> items = new ArrayList<HashMap<String,String>>();
ArrayAdapter<ArrayList<HashMap<String, String>>> ad = new ArrayAdapter<ArrayList<HashMap<String,String>>>(this, android.R.layout.simple_list_item_1,items);
but this gives me an error saying:
The constructor ArrayAdapter>>(searchname, int, ArrayList>) is undefined
ArrayAdapter wants to know the type of the items inside the list, not the type of the list itself. Remove the enclosing ArrayList<> and it should work.
ArrayList<HashMap<String,String>> items =
new ArrayList<HashMap<String,String>>();
ArrayAdapter<HashMap<String, String>> ad =
new ArrayAdapter<HashMap<String,String>>(this,
android.R.layout.simple_list_item_1,items);
ArrayAdapter with a ListView or something similar you have to write code that uses the HashMap<String,String> items in the list in a way that is useful to you, that won't happen automatically.have a look at this link Android Array Adapter with ArrayList and ListView not updating when the arraylist is changed.
basically you need to add your ArrayList into the ArrayAdapter through the add method.
You can convert the type HashMap<String,String>> to a class. For example, if the keys of the hashmap are countries and the values are lenguages, you can make a class called "Country" with this two variables (country,language).
Then the AdapterClass have to extend the ArrayAdapter<Country>, in the getView method you can access both variables of each Country.
