BluetoothAdapter.getDefaultAdapter() throwing RuntimeException while not in Activity

Question

When I\'m trying to get default bluetooth adapter while i\'m NOT in Activity, but in TimerTask (created inside Service) by using:

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Answer 1

This appears to be a bug in Android and still exists in Android 4.0 (Ice Cream Sandwich)

To workaround this and be able to call BluetoothAdapter.getDefaultAdapter() from a worker thread (e.g. AsyncTask), all you have to do is call BluetoothAdapter.getDefaultAdapter() once on the main UI thread (e.g. inside the onCreate() of your current activity).

The RuntimeException is only thrown during initialization, and BluetoothAdapter.getDefaultAdapter() only initializes the first time you call it. Subsequent calls to it will succeed, even in background threads.