我正在使用 firebase 作業(yè)調(diào)度程序 api 在后臺運行服務(wù)。在 Marshmallow 中它運行良好，但在使用 Oreo 設(shè)備時它無法運行。它顯示錯誤或警告消息，例如2019-02-04 14:20:22.285 2525-5699/? E/NetworkScheduler: Dropping task as app's play services SDK 版本不支持 Android O。請更新 SDK 或降低應(yīng)用的目標(biāo) SDK 版本。包：com.webappclouds.jobserviceexample我已經(jīng)完成了 git hub 中的 firebase job dispatcher api step 中提到的內(nèi)容。MainActiviy.javapackage com.webappclouds.jobserviceexample;    import android.app.job.JobInfo;    import android.app.job.JobScheduler;    import android.content.ComponentName;    import android.support.v7.app.AppCompatActivity;    import android.os.Bundle;    import android.util.Log;    import android.view.View;    import android.widget.Button;    import com.firebase.jobdispatcher.Constraint;    import com.firebase.jobdispatcher.FirebaseJobDispatcher;    import com.firebase.jobdispatcher.GooglePlayDriver;    import com.firebase.jobdispatcher.Job;    import com.firebase.jobdispatcher.Lifetime;    import com.firebase.jobdispatcher.RetryStrategy;    import com.firebase.jobdispatcher.Trigger;       public class MainActivity extends AppCompatActivity {String TAG="MAIN ACTIVITY";FirebaseJobDispatcher dispatcher;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    dispatcher = new FirebaseJobDispatcher(new GooglePlayDriver(this));}public void startjob(View view) {    Log.d(TAG, "startjob: ");    Job job = createJob(dispatcher);    dispatcher.mustSchedule(job);}public void stopjob(View view) {    Log.d(TAG, "cancelJob: ");    dispatcher.cancelAll();}public Job createJob(FirebaseJobDispatcher dispatcher) {    Log.d(TAG, "createJob: ");    Job job = dispatcher.newJobBuilder()            // persist the task across boots            .setLifetime(Lifetime.FOREVER)            // Call this service when the criteria are met.            .setService(MakeService.class)            // unique id of the task            .setTag("LocationJob")}}