bb47f32011
There is heavy work to do when add device to list in the DeviceListPreferenceFragment, off load these work from main thread to solve the issue. Make devicePreferenceMap a ConcurrentHashMap to avoid potential race condition. Also no longer use getCachedPreference(key) since we not put anything into the cache, the fallback flow is always used. Also in BluetoothDevicePreference.onPreferenceAttributesChanged(), move more heavy work to background thread. Using System.currentTimeMillis() to sort devices could cause flaky because System.currentTimeMillis() could be same for different device, use AtomicInteger instead. Fix: 286628533 Test: Following the step in bug Change-Id: Ia9750adb6b4c1424d084381e9d7c2ca8e7912391