Dynamically add view to android list?

Question

Hi I have run into a design issue and can't figure out the best approach to take. Here is a sample of what I am trying to achieve:

When the user clicks on the Plus icon another row will be added below the current condition. Currently the condition row is in a listview and is setup using a custom adapter. The left col is filled with the options that the user has chosen from the select columns view. All that is working but I can't seem to figure out how to add a new row. So is there a way to dynamically add a new row to the list and fill it with the same data? OR is there a better alternate way to set this up?

Look at this

M D
– M D

2015-09-14 15:05:51 +00:00
Commented Sep 14, 2015 at 15:05 — M D
– M D, Commented Sep 14, 2015 at 15:05

kris larson · Accepted Answer · 2015-09-14 20:42:40Z

So your custom adapter is starting off with three rows? Then when the user clicks on the plus icon, the onClick listener should call a method on your adapter that sets some kind of indication that there are now four rows (after which it calls notifyDataSetChanged()). And your getView() method should look at that indicator and if position == 2 (third row) and the indicator is not set, it returns an "Order By" view. If the indicator is set, then it should return a "Condition View" and only return an "Order By" view when position == 3 (fourth row). Does that make sense?

Your adapter reflects the state of your list model at any moment in time. Any event that occurs where you want to change the ListView should update some kind of state in the adapter. Then getView() should always check that current state when returning a view. So always think in two phases:

Your event (like onClick) updates some model data in the adapter somewhere.
Your adapter's getView() method always checks the current model data in the adapter to figure out how to set up the view for the given position.

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