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yanshouwang / bluetooth_low_energy

A Flutter plugin for controlling the bluetooth low energy.
https://pub.dev/packages/bluetooth_low_energy
MIT License
50 stars 16 forks source link

Unhandled Exception: PlatformException(NullPointerException, java.lang.NullPointerException: manager.openGattServer(m…etoothGattServerCallback) must not be null, Cause: null, Stacktrace: java.lang.NullPointerException: manager.openGattServer(m…etoothGattServerCallback) must not be null #41

Closed jcm10x1 closed 8 months ago

jcm10x1 commented 10 months ago

I am getting this error on app startup. It worked once, then stopped.

I/Choreographer(23721): Skipped 604 frames!  The application may be doing too much work on its main thread.
E/flutter (23721): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(NullPointerException, java.lang.NullPointerException: manager.openGattServer(m…etoothGattServerCallback) must not be null, Cause: null, Stacktrace: java.lang.NullPointerException: manager.openGattServer(m…etoothGattServerCallback) must not be null
E/flutter (23721):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManager.mOpenServer(MyPeripheralManager.kt:456)
E/flutter (23721):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManager.mOnStateChanged(MyPeripheralManager.kt:447)
E/flutter (23721):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManager.setUp(MyPeripheralManager.kt:106)
E/flutter (23721):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManagerHostApi$Companion.setUp$lambda-1$lambda-0(MyApi.g.kt:821)
E/flutter (23721):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManagerHostApi$Companion.$r8$lambda$rPfT_nG-ruq9HW1JuLDRUvvp9Hw(Unknown Source:0)
E/flutter (23721):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManagerHostApi$Companion$$ExternalSyntheticLambda0.onMessage(Unknown Source:2)
E/flutter (23721):      at io.flutter.plugin.common.BasicMessageChannel$IncomingMessageHandler.onMessage(BasicMessageChannel.java:261)
E/flutter (23721):      at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
E/flutter (23721):      at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:322)
E/flutter (23721):      at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/flutter (23721):      at android.os.Handler.handleCallback(Handler.java:883)
E/flutter (23721):      at android.os.Handler.dispatchMessage(Handler.java:100)
E/flutter (23721):      at android.os.Looper.loop(Looper.java:214)
E/flutter (23721):      at android.app.ActivityThread.main(ActivityThread.java:7615)
E/flutter (23721):      at java.lang.reflect.Method.invoke(Native Method)
E/flutter (23721):      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/flutter (23721):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
E/flutter (23721): , null)
E/flutter (23721): #0      MyPeripheralManagerHostApi.setUp (package:bluetooth_low_energy_android/src/my_api.g.dart:887:7)
E/flutter (23721): <asynchronous suspension>
E/flutter (23721): #1      MyPeripheralManager.setUp (package:bluetooth_low_energy_android/src/my_peripheral_manager.dart:63:5)
E/flutter (23721): <asynchronous suspension>
E/flutter (23721): #2      main (package:e_drum/main.dart:25:3)
E/flutter (23721): <asynchronous suspension>
yanshouwang commented 10 months ago

Can you test the example to see if this error exists? Can you make a minimal project for me to reproduce this issue?

jcm10x1 commented 10 months ago

@yanshouwang The example has the same error. Is the example an ok minimum reproduction? Here is the entire log.

The Flutter DevTools debugger and profiler on LM Q730 is available at:
http://127.0.0.1:9103?uri=http://127.0.0.1:56142/q9XiQQqccrM=/
D/BluetoothGattServer(27985): registerCallback()
D/BluetoothGattServer(27985): registerCallback() - UUID=4058a749-38c9-41c5-b875-10c99b602a51
I/Choreographer(27985): Skipped 604 frames!  The application may be doing too much work on its main thread.
D/Surface (27985): Surface::disconnect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::connect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::setBufferCount(this=0x7e0ef80000,bufferCount=3)
D/Surface (27985): Surface::disconnect(this=0x7e17331000,api=1)
D/Surface (27985): Surface::connect(this=0x7e17331000,api=1)
D/Surface (27985): Surface::disconnect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::connect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::setBufferCount(this=0x7e0ef80000,bufferCount=3)
D/Surface (27985): Surface::disconnect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::connect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::setBufferCount(this=0x7e0ef80000,bufferCount=3)
D/Surface (27985): Surface::disconnect(this=0x7e17331000,api=1)
D/Surface (27985): Surface::connect(this=0x7e17331000,api=1)
D/Surface (27985): Surface::disconnect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::connect(this=0x7e0ef80000,api=1)
D/Surface (27985): Surface::setBufferCount(this=0x7e0ef80000,bufferCount=3)

Performing hot restart...                                               
Restarted application in 2,605ms.
D/BluetoothGattServer(27985): registerCallback()
D/BluetoothGattServer(27985): registerCallback() - UUID=9c1327ce-31b7-44f0-9965-fe383a2c213a
I/Choreographer(27985): Skipped 602 frames!  The application may be doing too much work on its main thread.
I/GED     (27985): ged_boost_gpu_freq, level 100, eOrigin 2, final_idx 3, oppidx_max 3, oppidx_min 0
D/Surface (27985): Surface::disconnect(this=0x7e17331000,api=1)
D/Surface (27985): Surface::disconnect(this=0x7e17331000,api=-1)
D/Surface (27985): Surface::disconnect(this=0x7e0ef80000,api=1)
I/GED     (27985): ged_boost_gpu_freq, level 100, eOrigin 2, final_idx 3, oppidx_max 3, oppidx_min 0
I/Timeline(27985): Timeline: Activity_idle id: android.os.BinderProxy@dd4d2c0 time:1130514448
I/Timeline(27985): Timeline: Activity_idle id: android.os.BinderProxy@dd4d2c0 time:1130514450
D/Surface (27985): Surface::connect(this=0x7e17330000,api=1)
D/Surface (27985): Surface::setBufferCount(this=0x7e17330000,bufferCount=3)
D/Surface (27985): Surface::connect(this=0x7e0ef28000,api=1)
D/BluetoothGattServer(27985): onServerRegistered() - status=0 serverIf=7
E/BluetoothGattServer(27985): onServerRegistered: mCallback is null
D/BluetoothGattServer(27985): onServerRegistered() - status=0 serverIf=12
E/BluetoothGattServer(27985): onServerRegistered: mCallback is null
I/GED     (27985): ged_boost_gpu_freq, level 100, eOrigin 2, final_idx 3, oppidx_max 3, oppidx_min 0
D/Surface (27985): Surface::disconnect(this=0x7e0ef28000,api=1)
D/Surface (27985): Surface::disconnect(this=0x7e0ef28000,api=-1)
D/Surface (27985): Surface::disconnect(this=0x7e17330000,api=1)
I/GED     (27985): ged_boost_gpu_freq, level 100, eOrigin 2, final_idx 3, oppidx_max 3, oppidx_min 0
I/Timeline(27985): Timeline: Activity_idle id: android.os.BinderProxy@dd4d2c0 time:1130577133
E/flutter (24872): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(NullPointerException, java.lang.NullPointerException: manager.openGattServer(m…etoothGattServerCallback) must not be null, Cause: null, Stacktrace: java.lang.NullPointerException: manager.openGattServer(m…etoothGattServerCallback) must not be null
E/flutter (24872):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManager.mOpenServer(MyPeripheralManager.kt:456)
E/flutter (24872):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManager.mOnStateChanged(MyPeripheralManager.kt:447)
E/flutter (24872):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManager.setUp(MyPeripheralManager.kt:106)
E/flutter (24872):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManagerHostApi$Companion.setUp$lambda-1$lambda-0(MyApi.g.kt:821)
E/flutter (24872):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManagerHostApi$Companion.$r8$lambda$rPfT_nG-ruq9HW1JuLDRUvvp9Hw(Unknown Source:0)
E/flutter (24872):      at dev.yanshouwang.bluetooth_low_energy_android.MyPeripheralManagerHostApi$Companion$$ExternalSyntheticLambda0.onMessage(Unknown Source:2)
E/flutter (24872):      at io.flutter.plugin.common.BasicMessageChannel$IncomingMessageHandler.onMessage(BasicMessageChannel.java:261)
E/flutter (24872):      at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
E/flutter (24872):      at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:322)
E/flutter (24872):      at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/flutter (24872):      at android.os.Handler.handleCallback(Handler.java:883)
E/flutter (24872):      at android.os.Handler.dispatchMessage(Handler.java:100)
E/flutter (24872):      at android.os.Looper.loop(Looper.java:214)
E/flutter (24872):      at android.app.ActivityThread.main(ActivityThread.java:7615)
E/flutter (24872):      at java.lang.reflect.Method.invoke(Native Method)
E/flutter (24872):      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/flutter (24872):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
E/flutter (24872): , null)
E/flutter (24872): #0      MyPeripheralManagerHostApi.setUp (package:bluetooth_low_energy_android/src/my_api.g.dart:887:7)
E/flutter (24872): <asynchronous suspension>
E/flutter (24872): #1      MyPeripheralManager.setUp (package:bluetooth_low_energy_android/src/my_peripheral_manager.dart:63:5)
E/flutter (24872): <asynchronous suspension>
E/flutter (24872): #2      main (package:e_drum/main.dart:25:3)
E/flutter (24872): <asynchronous suspension>
E/flutter (24872):
yanshouwang commented 10 months ago

@jcm10x1 It's wired, I can't reproduce this with the example, here is the log

Launching lib\main.dart on 23013RK75C in debug mode...
√  Built build\app\outputs\flutter-apk\app-debug.apk.
Connecting to VM Service at ws://127.0.0.1:63120/SHuSzq-sTjc=/ws
D/BluetoothGattServer(13456): registerCallback()
D/BluetoothGattServer(13456): registerCallback() - UUID=17f2f6ad-98ec-4590-8cc3-edbae3f5ce69
D/BluetoothGattServer(13456): onServerRegistered() - status=0 serverIf=9
[MyCentralManager] setUp
[MyPeripheralManager] setUp
[MyCentralManager] onStateChanged: MyBluetoothLowEnergyStateArgs.on
[MyPeripheralManager] onStateChanged: MyBluetoothLowEnergyStateArgs.on
[MyCentralManager] getState
E/libEGL  (13456): pre_cache appList: ,,
E/LB      (13456): fail to open file: No such file or directory
W/1.raster(13456): type=1400 audit(0.0:8505): avc: denied { getattr } for path="/sys/module/metis/parameters/minor_window_app" dev="sysfs" ino=69262 scontext=u:r:untrusted_app:s0:c27,c257,c512,c768 tcontext=u:object_r:sysfs_migt:s0 tclass=file permissive=0 app=dev.yanshouwang.bluetooth_low_energy_example
D/_energy_example(13456): MiuiProcessManagerServiceStub setSchedFifo
I/MiuiProcessManagerImpl(13456): setSchedFifo pid:13456, mode:3
I/_energy_example(13456): ProcessProfilingInfo new_methods=0 is saved saved_to_disk=0 resolve_classes_delay=8000
W/Parcel  (13456): Expecting binder but got null!
D/DecorView[](13456): onWindowFocusChanged hasWindowFocus true
I/HandWritingStubImpl(13456): refreshLastKeyboardType: 1
2
I/HandWritingStubImpl(13456): getCurrentKeyboardType: 1

What's the Android version of your device? Any other steps to run into this?

yanshouwang commented 10 months ago

Form the error itself, seems the openGattServer returns null, that's will caused by BLE is powred off or run without UI thread, but the example should work.

jcm10x1 commented 10 months ago

I'm on Android 10. Which Android version are you on? Did you see what happens after a hot restart? I had to do that first and wait a minute. The example was also just a black screen, I'm not sure if it should be that way.

yanshouwang commented 10 months ago

which Android version are you on? Did you see what happens after a hot restart?

I'm running on an Android 13 Redmi device, the hot restart is also workd

Restarted application in 1,279ms.
I/_energy_example(13457): This is non sticky GC, maxfree is 8388608 minfree is 2097152
W/FinalizerDaemon(13457): type=1400 audit(0.0:8594): avc: denied { getopt } for path="/dev/socket/usap_pool_primary" scontext=u:r:untrusted_app:s0:c27,c257,c512,c768 tcontext=u:r:zygote:s0 tclass=unix_stream_socket permissive=0 app=dev.yanshouwang.bluetooth_low_energy_example
[MyCentralManager] setUp
[MyPeripheralManager] setUp
[MyCentralManager] onStateChanged: MyBluetoothLowEnergyStateArgs.on
[MyPeripheralManager] onStateChanged: MyBluetoothLowEnergyStateArgs.on
[MyCentralManager] getState
D/DecorView[](13457): onWindowFocusChanged hasWindowFocus false
jcm10x1 commented 10 months ago

I tried on an Android 5 device that I have and it seems to be working based on basic testing. Do you have a way to test on Android 10?

yanshouwang commented 10 months ago

I tried on an Android 5 device that I have and it seems to be working based on basic testing. Do you have a way to test on Android 10?

I don't have a Android 10 device right now. If the Android 5 works, maybe this a manufacturer issue? It's like you run into this with a LG devie, you can test this with other brands.

EDIT========== Tested on my Smartisan Pro(Android 7.1.1), still can't reproduce this issue.

yanshouwang commented 10 months ago

useful link: https://stackoverflow.com/questions/22981669/why-does-bluetoothmanager-opengattserver-always-return-null-on-my-nexus-7 https://stackoverflow.com/questions/55910502/opengattserver-returns-null

github-actions[bot] commented 9 months ago

This issue is stale because it has been open for 30 days with no activity.

github-actions[bot] commented 8 months ago

This issue was closed because it has been inactive for 14 days since being marked as stale.