mBinder = binder;
try { mBinder.cancel(jobId); } catch (RemoteException e) {}
try { mBinder.cancelAll(); } catch (RemoteException e) {}
try { return mBinder.getAllPendingJobs(); } catch (RemoteException e) { return null; }
try { return mBinder.schedule(job); } catch (RemoteException e) { return JobScheduler.RESULT_FAILURE; }