Email adapter for AutoCompleteTextView

EmailAdapter.java

private ArrayAdapter<String> getEmailAddressAdapter(Context context) {
    Account[] accounts = AccountManager.get(context).getAccountsByType("com.google");
    String[] addresses = new String[accounts.length];
    for (int i = 0; i < accounts.length; i++) { 
        addresses[i] = accounts[i].name;
    }
    return new ArrayAdapter<String>(context, android.R.layout.simple_dropdown_item_1line, addresses);
}

A small improvement on your idea

private String[] getListOfUserNames(Context context) {
HashSet emailIdsWithoutDuplicates = new HashSet();
Account[] accounts = AccountManager.get(context.getApplicationContext()).getAccounts();
for (int i = 0; i < accounts.length; i++) {
String name = accounts[i].name;
if (name.contains("@")) {
emailIdsWithoutDuplicates.add(name);
}
}
return getArrayFromSet(emailIdsWithoutDuplicates);
}

public static String[] getArrayFromSet(HashSet stringSet) {
return stringSet.toArray(new String[stringSet.size()]);
}

Nice. Would probably even use an email regex against the account names. There might be some crazy Twitter clients that use account names like "@jdamcd".

@akshaydashrath https://gist.github.com/jdamcd/4761834

Nice.. I came here to suggest exactly the same things, but they're already implemented! 👍