RxBle is not show disconnected when BluetoothGatt: android.os.DeadObjectException is thrown #275

hoanglm4 · 2017-09-01T10:16:21Z

Summary

CONNECTED state forever when BluetoothGatt: android.os.DeadObjectException is thrown

My code in below:

   private static final UUID characteristicUuid = UUID.fromString("25A80001-6478-11E6-BDF4-AD3BCC77759F");

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example4);
        ButterKnife.bind(this);
        bleDevice = SampleApplication.getRxBleClient(this).getBleDevice(macAddress);
        connectionObservable = prepareConnectionObservable();
        bleDevice.observeConnectionStateChanges().subscribe(state -> {
            Log.i(getClass().getSimpleName(), "" + state.toString());
        });
        connect();
    }

    private Observable<RxBleConnection> prepareConnectionObservable() {
        return bleDevice
                .establishConnection(false)
                .takeUntil(disconnectTriggerSubject)
                .compose(bindUntilEvent(PAUSE))
                .compose(new ConnectionSharingAdapter());
    }

    @OnClick(R.id.connect)
    public void connect() {
        connectionObservable.flatMap(RxBleConnection::discoverServices)
                .flatMap(rxBleDeviceServices -> rxBleDeviceServices.getCharacteristic(characteristicUuid))
                .observeOn(AndroidSchedulers.mainThread())
                .doOnSubscribe(() -> Log.i(getClass().getSimpleName(), "start connect "))
                .subscribe(
                        characteristic -> {
                            Log.i(getClass().getSimpleName(), "Hey, connection has been established!");
                        },
                        this::onConnectionFailure,
                        this::onConnectionFinished
                );
    }

   @OnClick(R.id.dissconnect)
    public void triggerDisconnect() {
        disconnectTriggerSubject.onNext(null);
    }

     @OnClick(R.id.read_rssi)
    public void readRSSI() {
        if (bleDevice.getConnectionState() != RxBleConnection.RxBleConnectionState.CONNECTED) {
            return;
        }
        connectionObservable.flatMap(rxBleConnection -> rxBleConnection.readRssi())
                .subscribe(rssi -> {
                    Log.i(getClass().getSimpleName(), "RSSI = " + rssi);
                }, throwable -> {
                    Log.i(getClass().getSimpleName(), "Connection error: " + throwable);
                });
    }

Sometime, when Bluetooth in phone is crashed => I call readRSSI => BluetoothGatt: android.os.DeadObjectException is thrown. But RxBleDevice#getConnectionState() return RxBleConnectionState{CONNECTED}.
When call readRSSI again, BluetoothGatt: android.os.DeadObjectException still thown.
After, I call triggerDisconnect() method => connect() method=> try to readRSSI, and it work fine.

Actual result

BluetoothGatt: android.os.DeadObjectException is thown
Please see log:

09-01 11:49:24.135 13204-13304/com.mysoftsource.vuzitech D/RxBle#Radio:   QUEUED RxBleRadioOperationReadRssi(28807445)
09-01 11:49:24.136 13204-13302/com.mysoftsource.vuzitech D/RxBle#Radio:  STARTED RxBleRadioOperationReadRssi(28807445)
09-01 11:49:24.138 13204-13204/com.mysoftsource.vuzitech D/BluetoothGatt: readRssi() - device: F7:A2:68:4B:DA:D3
09-01 11:49:24.139 13204-13204/com.mysoftsource.vuzitech E/BluetoothGatt: android.os.DeadObjectException
                                                                              at android.os.BinderProxy.transactNative(Native Method)
                                                                              at android.os.BinderProxy.transact(Binder.java:615)
                                                                              at android.bluetooth.IBluetoothGatt$Stub$Proxy.readRemoteRssi(IBluetoothGatt.java:1006)
                                                                              at android.bluetooth.BluetoothGatt.readRemoteRssi(BluetoothGatt.java:1121)
                                                                              at com.polidea.rxandroidble.internal.operations.RxBleRadioOperationReadRssi.startOperation(RxBleRadioOperationReadRssi.java:30)
                                                                              at com.polidea.rxandroidble.internal.RxBleSingleGattRadioOperation.protectedRun(RxBleSingleGattRadioOperation.java:56)
                                                                              at com.polidea.rxandroidble.internal.RxBleRadioOperation$1.call(RxBleRadioOperation.java:39)
                                                                              at com.polidea.rxandroidble.internal.RxBleRadioOperation$1.call(RxBleRadioOperation.java:35)
                                                                              at rx.internal.operators.OnSubscribeCreate.call(OnSubscribeCreate.java:72)
                                                                              at rx.internal.operators.OnSubscribeCreate.call(OnSubscribeCreate.java:32)
                                                                              at rx.Observable.unsafeSubscribe(Observable.java:10256)
                                                                              at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.call(OperatorSubscribeOn.java:100)
                                                                              at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
                                                                              at android.os.Handler.handleCallback(Handler.java:751)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                              at android.os.Looper.loop(Looper.java:154)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:6126)
                                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
09-01 11:49:24.141 13204-13302/com.mysoftsource.vuzitech D/RxBle#Radio: FINISHED RxBleRadioOperationReadRssi(28807445)
09-01 11:49:25.134 13204-13304/com.mysoftsource.vuzitech D/RxBle#Radio:   QUEUED RxBleRadioOperationReadRssi(189325052)
09-01 11:49:25.136 13204-13302/com.mysoftsource.vuzitech D/RxBle#Radio:  STARTED RxBleRadioOperationReadRssi(189325052)
09-01 11:49:25.138 13204-13204/com.mysoftsource.vuzitech D/BluetoothGatt: readRssi() - device: F7:A2:68:4B:DA:D3
09-01 11:49:25.140 13204-13204/com.mysoftsource.vuzitech E/BluetoothGatt: android.os.DeadObjectException
                                                                              at android.os.BinderProxy.transactNative(Native Method)
                                                                              at android.os.BinderProxy.transact(Binder.java:615)
                                                                              at android.bluetooth.IBluetoothGatt$Stub$Proxy.readRemoteRssi(IBluetoothGatt.java:1006)
                                                                              at android.bluetooth.BluetoothGatt.readRemoteRssi(BluetoothGatt.java:1121)
                                                                              at com.polidea.rxandroidble.internal.operations.RxBleRadioOperationReadRssi.startOperation(RxBleRadioOperationReadRssi.java:30)
                                                                              at com.polidea.rxandroidble.internal.RxBleSingleGattRadioOperation.protectedRun(RxBleSingleGattRadioOperation.java:56)
                                                                              at com.polidea.rxandroidble.internal.RxBleRadioOperation$1.call(RxBleRadioOperation.java:39)
                                                                              at com.polidea.rxandroidble.internal.RxBleRadioOperation$1.call(RxBleRadioOperation.java:35)
                                                                              at rx.internal.operators.OnSubscribeCreate.call(OnSubscribeCreate.java:72)
                                                                              at rx.internal.operators.OnSubscribeCreate.call(OnSubscribeCreate.java:32)
                                                                              at rx.Observable.unsafeSubscribe(Observable.java:10256)
                                                                              at rx.internal.operators.OperatorSubscribeOn$SubscribeOnSubscriber.call(OperatorSubscribeOn.java:100)
                                                                              at rx.android.schedulers.LooperScheduler$ScheduledAction.run(LooperScheduler.java:107)
                                                                              at android.os.Handler.handleCallback(Handler.java:751)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                              at android.os.Looper.loop(Looper.java:154)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:6126)
                                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
09-01 11:49:25.141 13204-13302/com.mysoftsource.vuzitech D/RxBle#Radio: FINISHED RxBleRadioOperationReadRssi(189325052)

Expected result

When BluetoothGatt: android.os.DeadObjectException is thrown => call disconnect and shown DISCONNECTED state

Library version

1.3.3

The text was updated successfully, but these errors were encountered:

dariuszseweryn · 2017-09-01T10:24:45Z

Could you check against 1.4.0-SNAPSHOT version? The code related to reporting state has changed there.

hoanglm4 · 2017-09-01T12:40:18Z

Dear @dariuszseweryn,

I have checked this issue in 1.4.0-SNAPSHOT, this bug is occur too. However, Bluetooth is crashed on Samsung Note II (rooted). I can not make bluetooth on Samsung J7(or HTC U11 because they are not rooted) is crashed.

Thanks

`DeadObjectException` is usually thrown when interacting with `BluetoothAdapter` or `BluetoothGatt` instance that was obtained before bluetooth being turned off. Prior to library version `1.3.0` all errors raised when interacting with `BluetoothGatt` or recieved by `BluetoothGattCallback` were closing the connection (were emitted by `RxBleDevice.establishConnection()`). After `1.3.0` only errors raised in `RxBleRadioOperationConnect` and recieved by `BluetoothGattCallback.onConnectionStateChange()` were closing the connection so it was possible that `DeadObjectException`s raised repetedly by subscribing to i.e. `RxBleConnection.readRssi()` would not close the connection. Added monitoring of BluetoothAdapter’s state to prevent `DeadObjectException`s and inform the user about the connection loss as soon as possible.

`DeadObjectException` is usually thrown when interacting with `BluetoothAdapter` or `BluetoothGatt` instance that was obtained before bluetooth being turned off. Prior to library version `1.3.0` all errors raised when interacting with `BluetoothGatt` or recieved by `BluetoothGattCallback` were closing the connection (were emitted by `RxBleDevice.establishConnection()`). After `1.3.0` only errors raised in `RxBleRadioOperationConnect` and recieved by `BluetoothGattCallback.onConnectionStateChange()` were closing the connection so it was possible that `DeadObjectException`s raised repetedly by subscribing to i.e. `RxBleConnection.readRssi()` would not close the connection. Added monitoring of BluetoothAdapter’s state to prevent `DeadObjectException`s and inform the user about the connection loss as soon as possible. Moved responsibility of checking the BluetoothAdapter’s state from Connector to DisconnectionRouter to have it in one place.

dariuszseweryn · 2017-09-11T10:19:33Z

@hoanglm4 I have just pushed a new version of 1.3.4-SNAPSHOT — it should now properly handle situation when BluetoothAdapter is turned off. Could you check it out?

Edit: it is a new 1.3.4-SNAPSHOT version

hoanglm4 · 2017-09-11T16:36:33Z

Dear @dariuszseweryn , thank you so much. I will check your fixed in tomorrow (currently, my country in midnight, so I don't have device for check it)

hoanglm4 · 2017-09-12T06:50:49Z

Dear @dariuszseweryn,
I can not connect to ble device. "java.lang.NullPointerException: Cannot return null from a non-@nullable @provides method" is thown when connect() method called

Version: 1.3.4-SNAPSHOT

Note: I using 1.3.3, this issue is not occur
Thanks

…278) `RxBleConnection` can be instantiated only after `BluetoothGatt` is available. Changed the Connector code from `Observable.just(connectionComponent.rxBleConnection()` to `Observable.fromCallable(connectionComponent::rxBleConnection)` equivalent.

dariuszseweryn · 2017-09-12T09:30:21Z

@hoanglm4 my bad — just pushed a fix. There should be a new version of 1.3.4-SNAPSHOT available in around 10 minutes. Feel free to re-check.

hoanglm4 · 2017-09-12T09:54:28Z

Dear @dariuszseweryn,

I have tested this issue. "DISCONNECTED" state is shown when bluetooth is crashed. I think your fixed is OK.

Thanks

dariuszseweryn · 2017-09-12T09:56:52Z

I am happy to hear that. :) Thank you for your report.

dariuszseweryn · 2017-09-12T10:22:56Z

@hoanglm4 I have just released an official 1.3.4 version :)
Best Regards

…ConnectOperation` will finish (#275) (#278) The `RxBleConnection` needs `BluetoothGatt` to be created. The `BluetoothGatt` is available only after the `ConnectOperation` will call `BluetoothDevice.connectGatt()` or `BluetoothGattCallback.onConnectionStateChange()` will be called whichever comes first.

hoanglm4 · 2017-09-12T17:33:53Z

Dear @dariuszseweryn,
Great! When you release 1.4.0?

Thanks

dariuszseweryn · 2017-09-12T18:22:34Z

I will probably try to release it tomorrow.

dariuszseweryn · 2017-09-13T15:50:24Z

FYI—it is released.

hoanglm4 · 2017-09-13T16:22:08Z

Great! Thank you so much :)

dariuszseweryn · 2020-02-11T18:01:50Z

I am afraid that this has nothing to do with the library judging by the stacktrace.

omeryounus · 2020-02-11T18:21:58Z

Okay I am going to remove it

omeryounus · 2020-02-11T18:25:10Z

I have seen this exception happening on some low end Android phones when calling gatt.disconnect method
i:e - E/BluetoothGatt: android.os.DeadObjectException
I am sure if there is any properly handling in library that would prevent it.

hoanglm4 changed the title ~~Ble is not disconnected when BluetoothGatt: android.os.DeadObjectException is thrown~~ RxBle is not show disconnected when BluetoothGatt: android.os.DeadObjectException is thrown Sep 1, 2017

dariuszseweryn self-assigned this Sep 1, 2017

dariuszseweryn mentioned this issue Sep 1, 2017

Two rxBleClient instances to handle two devices simultaneously #250

Closed

dariuszseweryn added the bug Bug that is caused by the library label Sep 1, 2017

dariuszseweryn added this to the 1.3.4 milestone Sep 5, 2017

dariuszseweryn closed this as completed Sep 12, 2017

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RxBle is not show disconnected when BluetoothGatt: android.os.DeadObjectException is thrown #275

RxBle is not show disconnected when BluetoothGatt: android.os.DeadObjectException is thrown #275

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RxBle is not show disconnected when BluetoothGatt: android.os.DeadObjectException is thrown #275

RxBle is not show disconnected when BluetoothGatt: android.os.DeadObjectException is thrown #275

Comments

hoanglm4 commented Sep 1, 2017 • edited Loading

Summary

Actual result

Expected result

Library version

dariuszseweryn commented Sep 1, 2017

hoanglm4 commented Sep 1, 2017

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hoanglm4 commented Sep 12, 2017 •

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