java - 空对象引用上的“android.os.Looper.quit()” - Android O

Question

我的应用程序的第一个 Activity 启动了一个 STICKY 服务，我用它来创建通知。最近我注意到 Android O 设备上的一个错误:当用户启动应用程序，几秒钟后应用程序处于后台状态时，用户会收到以下异常:

FATAL EXCEPTION: main
                  Process: com.callcatcher.callcatcher, PID: 27566
                  java.lang.RuntimeException: Unable to stop service callcatcher.call.com.callcatcher.NotificationService@e5b03d1: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.os.Looper.quit()' on a null object reference
                      at android.app.ActivityThread.handleStopService(ActivityThread.java:3563)
                      at android.app.ActivityThread.-wrap26(Unknown Source:0)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1721)
                      at android.os.Handler.dispatchMessage(Handler.java:106)
                      at android.os.Looper.loop(Looper.java:171)
                      at android.app.ActivityThread.main(ActivityThread.java:6633)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
                   Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.os.Looper.quit()' on a null object reference
                      at android.app.IntentService.onDestroy(IntentService.java:147)
                      at callcatcher.call.com.callcatcher.NotificationService.onDestroy(NotificationService.java:94)
                      at android.app.ActivityThread.handleStopService(ActivityThread.java:3541)
                      at android.app.ActivityThread.-wrap26(Unknown Source:0) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1721) 
                      at android.os.Handler.dispatchMessage(Handler.java:106) 
                      at android.os.Looper.loop(Looper.java:171) 
                      at android.app.ActivityThread.main(ActivityThread.java:6633) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 

Answer 1

仍然不确定异常的原因，但我刚刚从 IntentService 切换到 Service，现在工作正常。