Android: Custom Arrayadapter(s) For Different Custom Objects

I have a number of custom objects that are significantly different from each other. These objects are stored in different lists and are to be displayed in different ListViews. Beca

Solution 1:

You can define your adapter like this:

publicclassMyArrayAdapter<T> extendsArrayAdapter<T> 
 {
      HashMap<T, Integer> mIdMap = new HashMap<T, Integer>();

      publicMyArrayAdapter(Context context, int textViewResourceId, List<T> objects) {
        super(context, textViewResourceId, objects);
        for (int i = 0; i < objects.size(); ++i) {
          mIdMap.put(objects.get(i), i);
        }
      }
  }

Solution 2:

Probably, you want to use a BaseAdapter. And in the getView() of that adapter, check for the instanceof of the object, do things accordingly.

Solution 3:

public interace SomeInterface
{
    publicStringgetString();
}

publicclassclassAimplementsSomeInterface
{
    ...

    @OverridepublicStringgetString()
    {
        return"blabla";
    }
}

publicclassclassBimplementsSomeInterface
{
    ...

    @OverridepublicStringgetString()
    {
        return"whatever";
    }
}

publicclassInterfaceAdapterextendsArrayAdapter<SomeInterface> 
{
     publicInterfaceAdapter (Context context, int resource, List<SomeInterface> objects) {...}
}