本文介绍了当多个设备同时连接时，我的应用程序崩溃并出现错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当多个设备同时连接时，我的应用程序崩溃并显示以下错误.为什么会这样，我该如何解决?
When multiple devices connect at the same time, my app crashes with the below error. Why is this, and how can I resolve it?
当我在扫描后强制设备顺序连接时，它会很好地工作.
When I force devices to connect sequentially after scanning, it works nicely.
java.lang.IllegalStateException: Exception thrown on Scheduler.Worker thread. Add `onError` handling.
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:60)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
Caused by: rx.exceptions.OnErrorNotImplementedException
at rx.Observable$27.onError(Observable.java:7923)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:159)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.internal.operators.NotificationLite.accept(NotificationLite.java:147)
at rx.internal.operators.CachedObservable$ReplayProducer.replay(CachedObservable.java:404)
at rx.internal.operators.CachedObservable$CacheState.dispatch(CachedObservable.java:220)
at rx.internal.operators.CachedObservable$CacheState.onError(CachedObservable.java:201)
at rx.internal.operators.CachedObservable$CacheState$1.onError(CachedObservable.java:175)
at rx.observers.Subscribers$5.onError(Subscribers.java:225)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:159)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.onError(SubjectSubscriptionManager.java:227)
at rx.internal.operators.NotificationLite.accept(NotificationLite.java:147)
at rx.subjects.ReplaySubject$UnboundedReplayState.accept(ReplaySubject.java:465)
at rx.subjects.ReplaySubject$UnboundedReplayState.replayObserverFromIndex(ReplaySubject.java:514)
at rx.subjects.ReplaySubject$UnboundedReplayState.replayObserver(ReplaySubject.java:502)
at rx.subjects.ReplaySubject.caughtUp(ReplaySubject.java:427)
at rx.subjects.ReplaySubject.onError(ReplaySubject.java:387)
at com.polidea.rxandroidble.internal.RxBleRadioOperation.onError(RxBleRadioOperation.java:84)
at com.polidea.rxandroidble.internal.RxBleRadioOperation$1.onError(RxBleRadioOperation.java:50)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:159)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.internal.operators.OperatorDoOnEach$1.onError(OperatorDoOnEach.java:71)
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:159)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
at rx.internal.operators.OperatorSingle$ParentSubscriber.onError(OperatorSingle.java:139)
at rx.internal.operators.OperatorTake$1.onError(OperatorTake.java:62)
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:240)
at rx.internal.operators.OperatorMerge$MergeSubscriber.checkTerminate(OperatorMerge.java:776)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:537)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:526)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onError(OperatorMerge.java:810)
at rx.internal.operators.NotificationLite.accept(NotificationLite.java:147)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.accept(SubjectSubscriptionManager.java:318)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.emitLoop(SubjectSubscriptionManager.java:291)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.emitFirst(SubjectSubscriptionManager.java:270)
at rx.subjects.BehaviorSubject$1.call(BehaviorSubject.java:106)
at rx.subjects.BehaviorSubject$1.call(BehaviorSubject.java:102)
at rx.subjects.SubjectSubscriptionManager.add(SubjectSubscriptionManager.java:95)
at rx.subjects.SubjectSubscriptionManager.call(SubjectSubscriptionManager.java:60)
at rx.subjects.SubjectSubscriptionManager.call(SubjectSubscriptionManager.java:35)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable.unsafeSubscribe(Observable.java:8098)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:232)
at rx.internal.operators.OperatorMerge$MergeSubscriber.onNext(OperatorMerge.java:142)
at rx.internal.operators.OnSubscribeFromIterable$IterableProducer.fastpath(OnSubscribeFromIterable.java:127)
at rx.internal.operators.OnSubscribeFromIterable$IterableProducer.request(OnSubscribeFromIterable.java:70)
at rx.Subscriber.setProducer(Subscriber.java:211)
at rx.internal.operators.OnSubscribeFromIterable.call(OnSubscribeFromIterable.java:49)
at rx.internal.operators.OnSubscribeFromIterable.call(OnSubscribeFromIterable.java:32)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable.subscribe(Observable.java:8191)
at rx.Observable.subscribe(Observable.java:8158)
at com.polidea.rxandroidble.internal.operations.RxBleRadioOperationServicesDiscover.lambda$run$71(RxBleRadioOperationServicesDiscover.java:34)
at com.polidea.rxandroidble.internal.operations.RxBleRadioOperationServicesDiscover.access$lambda$0(RxBleRadioOperationServicesDiscover.java)
at com.polidea.rxandroidble.internal.operations.RxBleRadioOperationServicesDiscover$$Lambda$1.call(Unknown Source)
at rx.Observable$2.call(Observable.java:162)
at rx.Observable$2.call(Observable.java:154)
at rx.Observable.subscribe(Observable.java:8191)
at rx.Observable.subscribe(Observable.java:8158)
at com.polidea.rxandroidble.internal.operations.RxBleRadioOperationServicesDiscover.run(RxBleRadioOperationServicesDiscover.java:44)
at com.polidea.rxandroidble.internal.radio.RxBleRadioImpl$$Lambda$4.call(Unknown Source)
at rx.Observable$27.onNext(Observable.java:7928)
at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:139)
at rx.internal.util.ScalarSynchronousObservable$ScalarSynchronousAction.call(ScalarSynchronousObservable.java:115)
at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
... 8 more
Caused by: BleGattException{status=22, bleGattOperation=BleGattOperation{description='CONNECTION_STATE'}}
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.propagateStatusErrorIfGattErrorOccurred(RxBleGattCallback.java:245)
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.access$100(RxBleGattCallback.java:26)
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback$1.onConnectionStateChange(RxBleGattCallback.java:62)
at android.bluetooth.BluetoothGatt$1.onClientConnectionState(BluetoothGatt.java:181)
at android.bluetooth.IBluetoothGattCallback$Stub.onTransact(IBluetoothGattCallback.java:70)
at android.os.Binder.execTransact(Binder.java:446)
---------代码类-
------- Code Class --
package com.ths.bts.bt;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import com.polidea.rxandroidble.RxBleConnection;
import com.polidea.rxandroidble.RxBleDevice;
import com.polidea.rxandroidble.RxBleDeviceServices;
import com.ths.bts.utils.Defs;
import com.ths.bts.utils.Utility;
import java.util.HashMap;
import java.util.List;
import java.util.UUID;
import rx.Observable;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.subjects.PublishSubject;
public class RXClass {
private String macAddress;
private RxBleDevice rxBleDevice;
private RxBleConnection connection;
private rx.Observable<RxBleConnection> connectionObservable;
private Subscription subscription;
private BluetoothDevice device;
private BleProfileManager bleProfileManager;
private Handler mActionHandler = null;
private PublishSubject<Void> disconnectTriggerSubject = null;
private HashMap<UUID,BluetoothGattCharacteristic> charMap = new HashMap<>();
public BleProfileManager getBleProfileManager() {
return bleProfileManager;
}
public PublishSubject<Void> getDisconnectTriggerSubject() {
return disconnectTriggerSubject;
}
public void setDisconnectTriggerSubject(PublishSubject<Void> disconnectTriggerSubject) {
this.disconnectTriggerSubject = disconnectTriggerSubject;
}
public void setBleProfileManager(BleProfileManager bleProfileManager) {
this.bleProfileManager = bleProfileManager;
}
public BluetoothDevice getDevice() {
return device;
}
public void setDevice(BluetoothDevice device) {
this.device = device;
}
public Subscription getSubscription() {
return subscription;
}
public void setSubscription(Subscription subscription) {
this.subscription = subscription;
}
public Observable<RxBleConnection> getConnectionObservable() {
return connectionObservable;
}
public void setConnectionObservable(Observable<RxBleConnection> connectionObservable) {
this.connectionObservable = connectionObservable;
}
public String getMacAddress() {
return macAddress;
}
public void setMacAddress(String macAddress) {
this.macAddress = macAddress;
}
public RxBleDevice getRxBleDevice() {
return rxBleDevice;
}
public void setRxBleDevice(RxBleDevice rxBleDevice) {
this.rxBleDevice = rxBleDevice;
}
public RxBleConnection getConnection() {
return connection;
}
public void setConnection(RxBleConnection connection) {
this.connection = connection;
}
public RXClass(String address)
{
this.macAddress = address;
mActionHandler = new Handler(Looper.getMainLooper());
}
public byte[] getSecurityCommand(String address)
{
String second = address.substring(3, 5);
String fifth = address.substring(12, 14);
String command = fifth.trim() + "3663" + second.trim();
byte b[] = hexStringToByteArray(command);
return b;
}
public synchronized byte[] hexStringToByteArray(String s) {
int len = s.length();
byte[] data = new byte[(len / 2)];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
}
return data;
}
public void readAllChars(List<BluetoothGattService> services)
{
for (BluetoothGattService service : services)
{
if(service.getCharacteristics().size() > 0 && !service.getCharacteristics().get(0).getUuid().equals(Defs.CHAR_ALERT_LEVEL_UUID)
&& !service.getCharacteristics().get(0).getUuid().equals(Defs.CHAR_CUSTOM_SERVICE_UUID))
{
int props = service.getCharacteristics().get(0).getProperties();
if ((props & 2) != 0) {
charMap.put(service.getCharacteristics().get(0).getUuid(), service.getCharacteristics().get(0));
readCharacterisitc(service.getCharacteristics().get(0).getUuid());
}
}
}
}
public void connect()
{
}
public void disconnect()
{
if(subscription != null) {
subscription.unsubscribe();
Utility.infoLog("NANI", "Disconnecting - " + this.device.getAddress() + " - " + rxBleDevice.getConnectionState());
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "ondisconnect");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_DEVICE_DISCONNECT);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
}
public int getConnectionState()
{
if(this.rxBleDevice != null)
{
if(rxBleDevice.getConnectionState() == RxBleConnection.RxBleConnectionState.CONNECTED)
return bleProfileManager.STATE_PROFILE_CONNECTED;
if(rxBleDevice.getConnectionState() == RxBleConnection.RxBleConnectionState.DISCONNECTED)
return bleProfileManager.STATE_PROFILE_DISCONNECTED;
if(rxBleDevice.getConnectionState() == RxBleConnection.RxBleConnectionState.CONNECTING)
return bleProfileManager.STATE_PROFILE_STATE_CONNECTING;
if(rxBleDevice.getConnectionState() == RxBleConnection.RxBleConnectionState.DISCONNECTING)
return bleProfileManager.STATE_PROFILE_STATE_DISCONNECTING;
}
return bleProfileManager.STATE_PROFILE_DISCONNECTED;
}
public void unscribe()
{
if(subscription != null && subscription.isUnsubscribed())
subscription.unsubscribe();
}
private void triggerDisconnect() {
disconnectTriggerSubject.onNext(null);
}
public void readRemoteRssi() {
connection.readRssi()
.observeOn(AndroidSchedulers.mainThread())
.subscribe(this::onRSSIReadSuccess, this::onRSSIReadFailure);
}
public void readCharacterisitc(UUID iCharUuid)
{
connection.readCharacteristic(iCharUuid)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(this::onReadSuccess, this::onReadFailure);
}
public void writeCharacteristic(UUID iCharUuid,
byte[] data)
{
connection.writeCharacteristic(iCharUuid, data)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(this::onWriteSuccess, this::onWriteFailure);
}
public void writeCharacteristic(UUID iCharUuid,
int data)
{
byte b[] = new byte[1];
b[0] = (byte)data;
connection.writeCharacteristic(iCharUuid, b)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(this::onWriteSuccess, this::onWriteFailure);
}
public void enableNotification(UUID iCharUuid)
{
connection.setupNotification(iCharUuid)
.observeOn(AndroidSchedulers.mainThread())
.flatMap(notificationObservable -> notificationObservable)
.subscribe(this::onNotificationReceived, this::onNotificationSetupFailure);
}
public BluetoothGattCharacteristic getCharacteristic(UUID iCharUuid)
{
return charMap.get(iCharUuid);
}
// Call backs
public void onConnectionFailure(Throwable throwable) {
Utility.infoLog("NANI", "Connection Failed" + this.macAddress);
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "ondisconnect");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_DEVICE_CONNECTION_FAILED);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
public void onConnectionReceived(RxBleConnection connection) {
Utility.infoLog("NANI", "Connection Success - " + this.macAddress);
this.connection = connection;
connection.discoverServices().subscribe(this::onServiceDiscovered);
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "onConnectionStateChange");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_DEVICE_CONNECT);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
public void onConnectionStateChange(RxBleConnection.RxBleConnectionState newState) {
//Utility.infoLog("NANI", "Connection Status - " + newState);
}
public void onServiceDiscovered(RxBleDeviceServices services) {
Utility.infoLog("NANI", "Services Success - " + this.macAddress);
writeCharacteristic(Defs.CHAR_CUSTOM_CONNECTION_UUID, getSecurityCommand(this.macAddress));
if(services != null)
{
readAllChars(services.getBluetoothGattServices());
}
if(charMap.get(Defs.CHAR_BIOSENSOR_NOTIFY_UUID) != null)
readCharacterisitc(Defs.CHAR_BIOSENSOR_NOTIFY_UUID);
if(charMap.get(Defs.CHAR_BIOSENSOR_NOTIFY_UUID) != null)
readCharacterisitc(Defs.CHAR_BIOSENSOR_NOTIFY_UUID);
if(charMap.get(Defs.CHAR_BIOSENSOR_CONNECTION_UUID) != null)
writeCharacteristic(Defs.CHAR_BIOSENSOR_CONNECTION_UUID, getSecurityCommand(this.macAddress));
if(charMap.get(Defs.CHAR_CUSTOM_CONNECTION_UUID) != null)
writeCharacteristic(Defs.CHAR_CUSTOM_CONNECTION_UUID, getSecurityCommand(this.macAddress));
if(charMap.get(Defs.CHAR_BIOSENSOR_NOTIFY_UUID) != null)
enableNotification(Defs.CHAR_BIOSENSOR_NOTIFY_UUID);
if(charMap.get(Defs.CHAR_AUTOMATION_IO) != null)
enableNotification(Defs.CHAR_AUTOMATION_IO);
try{ConnectionManager.resetWait(device.getAddress());}catch(Exception e){e.printStackTrace();}
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "onServicesDiscovered");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_SERVICE_DISCOVERY_DONE);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
public void onReadFailure(Throwable throwable) {
}
public void onReadSuccess(byte[] b) {
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "oncharread");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_GATT_ON_CHAR_READ);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
public void onWriteSuccess(byte[] b) {
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "oncharwrite");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_GATT_ON_CHAR_WRITE);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
public void onNotificationReceived(byte[] bytes) {
Utility.infoLog("NANI", "Noification Recevied" + this.macAddress);
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "oncharwrite");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_DEVICE_CLIP_UPDATE);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
private void notificationHasBeenSetUp() {
}
public void onNotificationSetupFailure(Throwable throwable) {
Utility.infoLog("NANI", "Noification Failed" + this.macAddress);
}
public void onRSSIReadSuccess(int rssi) {
Defs.B_DEVICES_RSSI_MAP.put(this.macAddress, new Integer(rssi));
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "oncharwrite");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_DEVICE_READ_SSI);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
public void onRSSIReadFailure(Throwable throwable) {
}
public void onWriteFailure(Throwable throwable) {
}
}
推荐答案
我浏览了一下代码，发现connection.discoverServices().subscribe(this::onServiceDiscovered);没有错误处理:
I have skimmed through the code and I have found a connection.discoverServices().subscribe(this::onServiceDiscovered); without error handling in:
public void onConnectionReceived(RxBleConnection connection) {
Utility.infoLog("NANI", "Connection Success - " + this.macAddress);
this.connection = connection;
connection.discoverServices().subscribe(this::onServiceDiscovered);
if(bleProfileManager != null && bleProfileManager.getRemoteHandlers() != null )
{
mActionHandler.post(new Runnable() {
@Override
public void run() {
for (int i = 0; i < bleProfileManager.getRemoteHandlers().size(); i++) {
Handler handler = bleProfileManager.getRemoteHandlers().get(i);
Bundle bundle = new Bundle();
bundle.putString("eventType", "onConnectionStateChange");
Message msg = Message.obtain(handler, Defs.HDLR_MSG_DEVICE_CONNECT);
bundle.putParcelable(BluetoothDevice.EXTRA_DEVICE, device);
msg.setData(bundle);
msg.sendToTarget();
}
}
});
}
}
此外，您在以下方面有误:
Additionally you have a mistake in:
public void unscribe()
{
if(subscription != null && subscription.isUnsubscribed())
subscription.unsubscribe();
}
应为if(subscription != null && !subscription.isUnsubscribed())，否则它将永远不会退订.
It should be if(subscription != null && !subscription.isUnsubscribed()) because otherwise it will never unsubscribe.
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