I have a little bit of a confusion when it comes to what is considered the better implementation.

One the one hand,

LinkedHashMap provides the following benefits:

1. Prevents duplicate items (I need to be able to prevent a scanned Bluetooth device to not repeatedly enter the list.)
2. Provides easy access to items for updating values.

And the following pitfalls:

1. Not supported naturally by the BaseAdapter class? I cannot seem to retrieve elements using getItem for a custom ListView Adapter.

However with an ArrayList

1. I can easily access items via their indices.
2. Can easily replace items for updating values.

3. Works easily with custom BaseAdapter class. But...

4. I receive duplicated items.

5. I cannot easily compare or check with the ArrayList.contains method unless I implement some custom comparators of the ArrayList's objects' parameters.

Is there an easier way to achieve the following:

1. Scan via BLE, construct a custom object from the scan results. (already complete).
2. Stick that custom object in an array list if it isn't already in it.
3. If it is already in the array list, replace the previous object with the new one?