ListPreference with a max number of selectable options

Question

I want to have an element in my preference menu that does the following:

• Show a list of options.
• Many are selectable
• Maximum amount of options to be chosen 2.

Possibilities I thought of:

1. Doing a separated PreferenceScreen and showing options as checkBoxes, but I don't know where to place the logic of max 2 options.
2. Extending DialogPreference and doing it by hand.

What's the best way?

Answer 1

Extending DialogPreference would get you the closest in terms of look-and-feel; the Preference classes are fairly unflexible and un-extendable in my experience.

I can't remember too much about PreferenceScreen, but I imagine it's similar.

In an app I worked on, we ended up using separate activities, launched via Intent from a Preference item onClick. This allowed us to easily develop preference screens that require validation logic a bit more complex than the usual.