Android Array Adapter with ArrayList and ListView not updating when the arraylist is changed

Question

I have an android app with a screen that comprises of a ListView, which I am using to display a list of devices. These devices are held in an array.

I am trying to use

Answer 1

For an ArrayAdapter, notifyDataSetChanged only works if you use the add, insert, remove, and clear functions on the Adapter.

1. Use clear to clear the adapter - arrayAdapter.clear()
2. Use Adapter.addAll and add the newly formed list - arrayAdapter.addAll(deviceList)
3. Call notifyDataSetChanged

Alternatives:

1. Repeat this step after new devicelist is formed - but this is redundant

   arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, deviceList);
   

2. Create your own class derived from BaseAdapter and ListAdapter that gives you more flexibility. This is most recommended.