Android - Listening to NFC Adapter State Changed

Question

I am trying to build an application which uses NFC. The goal is to display a DialogFragment containing a button link to go the settings and change it manually and when the f

Answer 1

You can use ACTION_ADAPTER_STATE_CHANGED to receive a broadcast message when the state of the adapter changes, but that option is only available in API 18 and above. See this for the documentation.

For prior to 18, I don't know of a way to do this unfortunately.

Also, as an aside, the android.provider.Settings.ACTION_NFC_SETTINGS will work on API levels 16 and above. For prior versions, the NFC settings are under "wireless settings". Take a look at the ensureSensorIsOn method at the bottom of this blog post for a code sample that checks against the API level and redirects to the correct settings pane.