我创建了一个辅助功能服务，但是如果我从设置面板关闭辅助功能服务（对于我的应用），并且应用程序未处于活动状态，则不会调用onUnbind服务。如果应用程序处于活动状态，则每次都会调用onUnbind。
07-13 11:47:24.327 10974-10974/com.example.tarun.myappforkeyevent I/dalvikvm: Could not find method android.content.Context.getSystemService, referenced from method service.MyAccessibilityService.access$super
07-13 11:47:24.327 10974-10974/com.example.tarun.myappforkeyevent W/dalvikvm: VFY: unable to resolve virtual method 502: Landroid/content/Context;.getSystemService (Ljava/lang/Class;)Ljava/lang/Object;
07-13 11:47:24.329 10974-10974/com.example.tarun.myappforkeyevent D/dalvikvm: VFY: replacing opcode 0x6f at 0x0035
07-13 11:47:24.329 10974-10974/com.example.tarun.myappforkeyevent I/dalvikvm: Could not find method android.content.Context.getColorStateList, referenced from method service.MyAccessibilityService.access$super
07-13 11:47:24.330 10974-10974/com.example.tarun.myappforkeyevent W/dalvikvm: VFY: unable to resolve virtual method 484: Landroid/content/Context;.getColorStateList (I)Landroid/content/res/ColorStateList;
07-13 11:47:24.331 10974-10974/com.example.tarun.myappforkeyevent D/dalvikvm: VFY: replacing opcode 0x6f at 0x004f
07-13 11:47:24.331 10974-10974/com.example.tarun.myappforkeyevent I/dalvikvm: Could not find method android.accessibilityservice.AccessibilityService.getWindows, referenced from method service.MyAccessibilityService.access$super
07-13 11:47:24.332 10974-10974/com.example.tarun.myappforkeyevent W/dalvikvm: VFY: unable to resolve virtual method 25: Landroid/accessibilityservice/AccessibilityService;.getWindows ()Ljava/util/List;
07-13 11:47:24.333 10974-10974/com.example.tarun.myappforkeyevent D/dalvikvm: VFY: replacing opcode 0x6f at 0x0080
07-13 11:47:24.333 10974-10974/com.example.tarun.myappforkeyevent I/dalvikvm: Could not find method android.content.ContextWrapper.getCodeCacheDir, referenced from method service.MyAccessibilityService.access$super
07-13 11:47:24.334 10974-10974/com.example.tarun.myappforkeyevent W/dalvikvm: VFY: unable to resolve virtual method 555: Landroid/content/ContextWrapper;.getCodeCacheDir ()Ljava/io/File;
07-13 11:47:24.335 10974-10974/com.example.tarun.myappforkeyevent D/dalvikvm: VFY: replacing opcode 0x6f at 0x00e6
为什么显示这些错误而不是调用onUnbind？