Settings.canDrawOverlays（）调用包管理器已经死亡。由android.os.DeadObjectException引起

Question

我仅在不同设备上的Android 6.0 - 6.0.1上获得此例外。

Fatal Exception: java.lang.RuntimeException: Package manager has died
       at android.app.ApplicationPackageManager.getPackagesForUid(ApplicationPackageManager.java:632)
       at android.provider.Settings.getPackageNameForUid(Settings.java:14462)
       at android.provider.Settings.canDrawOverlays(Settings.java:1569)
       at com.myproject.project.services.MyService.removeicon(MyService.java:240)
       at com.myproject.project.services.MyService.access$200(MyService.java:57)
       at com.myproject.project.services.MyService$1.run(MyService.java:232)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:158)
       at android.app.ActivityThread.main(ActivityThread.java:7225)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by android.os.DeadObjectException
       at android.os.BinderProxy.transactNative(Binder.java)
       at android.os.BinderProxy.transact(Binder.java:503)
       at android.content.pm.IPackageManager$Stub$Proxy.getPackagesForUid(IPackageManager.java:3746)
       at android.app.ApplicationPackageManager.getPackagesForUid(ApplicationPackageManager.java:630)
       at android.provider.Settings.getPackageNameForUid(Settings.java:14462)
       at android.provider.Settings.canDrawOverlays(Settings.java:1569)
       at com.myproject.project.services.MyService.removeicon(MyService.java:240)
       at com.myproject.project.services.MyService.access$200(MyService.java:57)
       at com.myproject.project.services.MyService$1.run(MyService.java:232)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:158)
       at android.app.ActivityThread.main(ActivityThread.java:7225)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

我知道这是因为我使用Settings.canDrawOverlays（this）而不是Settings.canDrawOverlays（getApplicationContext（）），但我不确定。我之前从未遇到过DeadObjectException。你能解释我什么时候可以捕获这个异常以及如何避免这个异常。感谢。