Android SDK crashes with Null Pointer if Bluetooth is enabled after app launch

BLE Beacons
1

The Estimote Android SDK is throwing a null pointer exception. Are we doing something wrong here, or is this an SDK bug?

Steps to reproduce:

  1. Disable Bluetooth on the phone
  2. Start our app (which starts monitoring a region using Estimote SDK)
  3. Enable Bluetooth. Estimote SDK throws null pointer exception and crashes our app.

Here is the stack trace:

01-15 15:34:00.473 28356-28373/ E/EstimoteSDK: com.estimote.sdk.service.internal.LollipopBluetoothAdapter.stop:194 BluetoothAdapter throws unexpected exception
                                                                 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.bluetooth.le.BluetoothLeScanner.flushPendingScanResults(android.bluetooth.le.ScanCallback)' on a null object reference
                                                                     at com.estimote.sdk.service.internal.LollipopBluetoothAdapter.stop(LollipopBluetoothAdapter.java:189)
                                                                     at com.estimote.sdk.service.internal.CycleBluetoothScanner.stop(CycleBluetoothScanner.java:72)
                                                                     at com.estimote.sdk.service.internal.CycleBluetoothScanner$1.run(CycleBluetoothScanner.java:84)
                                                                     at android.os.Handler.handleCallback(Handler.java:739)
                                                                     at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                     at android.os.Looper.loop(Looper.java:148)
                                                                     at android.os.HandlerThread.run(HandlerThread.java:61)
01-15 15:34:05.507 28356-28373/ E/AndroidRuntime: FATAL EXCEPTION: BeaconServiceThread
                                                                    Process: com.pointy.android, PID: 28356
                                                                    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.bluetooth.le.BluetoothLeScanner.startScan(java.util.List, android.bluetooth.le.ScanSettings, android.bluetooth.le.ScanCallback)' on a null object reference
                                                                        at com.estimote.sdk.service.internal.LollipopBluetoothAdapter.start(LollipopBluetoothAdapter.java:179)
                                                                        at com.estimote.sdk.service.internal.CycleBluetoothScanner.start(CycleBluetoothScanner.java:59)
                                                                        at com.estimote.sdk.service.internal.CycleBluetoothScanner$1.run(CycleBluetoothScanner.java:93)
                                                                        at android.os.Handler.handleCallback(Handler.java:739)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                        at android.os.Looper.loop(Looper.java:148)
                                                                        at android.os.HandlerThread.run(HandlerThread.java:61)
2

Thanks for your report! Can you also let us know the version of the SDK, what device you’re using, and what’s the Android OS version? Should help us reproduce it.

3

Ah, sorry, should have included that.

SDK version: 0.9.5
Android OS version: 6.0.1 (Build MMB29P)
Devices tested: Nexus 5 and Nexus 5X (both crash)

4

Thanks for that!

I just got a note from our Android engineers that this one is already fixed and should go out in the upcoming SDK release.

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