Service not registered

Caused by: java.lang.IllegalArgumentException:  Service not registered : com.broadcom.bt.app.settings.ServiceExtraSettingsActivity@414e11e0
 at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:923)
 at android.app.ContextImpl.unbindService(ContextImpl.java:1234)
 at android.content.ContextWrapper.unbindService(ContextWrapper.java:405)
 at com.broadcom.bt.app.settings.ServiceExtraSettingsActivity.onPause(ServiceExtraSettingsActivity.java:169)
 at android.app.Activity.performPause(Activity.java:5108)
 at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1225)
 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2838)
 ... 12 more 
  
服务未注册，看到其他博客上是用this.getApplicationContext去获取的bindservice 
但为了保险起见，我的做法是设置一个布尔型的变量 
1、private boolean isBind = false ; 
2、isBind = bindService(svcMgrIntent, this, Context.BIND_AUTO_CREATE); 
 3、if (isBind) {
            unbindService(this);
            isBind = false;
        }