CODEWITHSUNDEEP
javaandroidconstructorandroid-arrayadapter
Nik
Nik

Reputation: 143

Constructor is undefined in Custom ArrayAdapter

I know this has been solved a million times and yes i have searched, but it doesn't work for me.

The problem is that method super doesn't want proper arguments.

The code:

public class QuotesArrayAdapter extends ArrayAdapter<Map<Integer,List<String>>> {
private Context context;
Map<Integer,List<String>> Values;
static int textViewResId;
Logger Logger;

public QuotesArrayAdapter(Context context, int textViewResourceId, Map<Integer,List<String>> object) {
    super(context, textViewResourceId, object);   //<---- ERROR HERE
    this.context = context;
    this.Values = object;
    Logger = new Logger(true);
    Logger.l(Logger.TAG_DBG, "ArrayAdapter Inited");
}

What Eclipse says:

Multiple markers at this line
- The constructor ArrayAdapter<Map<Integer,List<String>>>(Context, int, Map<Integer,List<String>>) 
 is undefined
- The constructor ArrayAdapter<Map<Integer,List<String>>>(Context, int, Map<Integer,List<String>>) 
 is undefined

It wants super(Context, int) and that's not what i want

Upvotes: 0

Views: 2058

Answers (3)

Maxim Shoustin
Maxim Shoustin

Reputation: 77904

In additional you can use Arrays.asList(..)

public QuotesArrayAdapter(Context context, int textViewResourceId, Map<Integer,List<String>> object) {
    super(context, textViewResourceId,  Arrays.asList(object));   
....

Upvotes: 1

Sam
Sam

Reputation: 86948

Quite simply there is no constructor in ArrayAdapter that takes a Map...

You need to convert it into a List or primitive Array, if neither of those options work then you will have to extend BaseAdapter instead.

Upvotes: 1

Jon Skeet
Jon Skeet

Reputation: 1500495

Look at the constructors available for ArrayAdapter.

ArrayAdapter(Context context, int textViewResourceId)
ArrayAdapter(Context context, int resource, int textViewResourceId)
ArrayAdapter(Context context, int textViewResourceId, T[] objects)
ArrayAdapter(Context context, int resource, int textViewResourceId, T[] objects)
ArrayAdapter(Context context, int textViewResourceId, List<T> objects)
ArrayAdapter(Context context, int resource, int textViewResourceId, List<T> objects)

None of those matches your arguments.

Which one did you intend to invoke? Your T here is Map<Integer,List<String>>, but your constructor's object parameter is of exactly that type. If you want to use one of the constructors which requires a collection, you need to build that collection from that single object you've got.

The simplest approach is probably just to use:

public QuotesArrayAdapter(Context context, int textViewResourceId,
                          Map<Integer,List<String>> object) {
    super(context, textViewResourceId);
    add(object);
    ...
}

Upvotes: 5

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