使用定期工作管理器每 30 秒生成一次通知

Question

I am developing an android app in which i want to generate notification after every 30 sec. I could use simple timer function but i need to generate notification even app is completely destroyed. Now for that purpose i used work manager api.I never used this api but work manager work only for first time. The notification doesn't come again

this is my worker class

@Override
public Result doWork() {

    displayNotification();

      return Result.SUCCESS;
   }

this function runs in oncreate of main activity

    PeriodicWorkRequest dailyWorkRequest = new PeriodicWorkRequest.Builder(MyWorker.class,30,TimeUnit.SECONDS)
            .setConstraints(Constraints.NONE).build();

    WorkManager.getInstance()
            .enqueue(dailyWorkRequest);

this is libraray i used for work manager

implementation "android.arch.work:work-runtime:1.0.0-alpha04"

Answer 1

You want your app to essentially run all the time. In that case just use a foreground Service , and manage notifications that way.