I have requirement to upload some data to cloud or server at/after every 3 seconds.
I thought of using Work Manager for this Periodic Task of 3 Seconds.
But while started learning the things, I got the below point for the periodic task implementation using Work Manager.
The point is :
Note: The minimum repeat interval that can be defined is 15 minutes (same as the JobScheduler API).
So, Can't I use Work Manager for the interval of 3 Seconds?
Please guide and suggest me the best way to implement this task.
Thanks in Advance.
To implement this task, the best methodology is to use a foreground service and aquire wake locks. That way, the service will always be running and you can send data every 3 seconds.
Workmanager is not suitable for your case here.
Related
I am working on tracking app where i get the location update in background mode from gps.
I have search on google i found that Android 12 - Foreground service launch restrictions.
So you have use Work manager insted of foreground intentService.
And workManager minimum limit is 15 minutues for WorkManager Periodicity. Then how can i get location update every seconds in background mode.
Because workmanager request not run every seconds.
Thank you.
When you are actively tracking the user you should use a Foreground Service. WorkManager is for cases where you care for the Work to finish, but the priority will be to save the battery.
I can assure you that WorkManager is the wrong API for you.
Why do you need to start the service from the background? What is your exact use case?
Check here:
https://developer.android.com/guide/background#replacing-foregound
Some use cases for using foreground services directly are as follows:
Media playback
Activity tracking
Location sharing
Voice or video calls
Greeting StackOverflow community!
In my Android app, I am trying to schedule a periodical task, that will be executed every 5 minutes. There are some requirements:
Should be independent of the app lifecycle
Should be restarted after the device reboot
Should be an exact 5 minutes interval
I check a lot of Google Docs and found, that WorkManager is the best choice for this case. I should say, that the task is sending some stats to the server. But the main problem is the minimum interval time for PeriodicWorkRequest equals 15 minutes
The question is: how can I setup 5 minutes interval for PeriodicWorkRequest, or there is a better solution? Maybe I should use older AlarmManager for this case? I am new in Android development and not sure, what solution will be better.
Hope for you and I will be glad to get any kind of help =)
What is the best approach to implement a service which executes every 15 mins.
Execution should happen when app is killed / in the background and even when it's running.
It should do some http work which is already works fine but with asynctask.
If this http returns with a particular data, it should show a notification.
How should i do this?
Any help is greatly appriciated.
I'm fine if you just mention approaches, methods, patterns, best practices, etc..
Thank you!
What is the best approach to implement a service which executes every
15 mins.
Using the Job Scheduler. Information on job scheduling can be found at the Intelligent Job-Scheduling documentation. However, be aware that you can't be 100% sure that your service is going to run exactly every 15 minutes as its execution can be affected by the Doze mode and its restrictions.
For the notification part, you build your notification as you would normally do.
If you need more info, you may view the Using the Android Job Scheduler and Background work with JobScheduler videos and check this sample project. Also, one relevant question regarding the repetitive nature of the service can be found here.
According to https://github.com/ReactiveX/RxAndroid/issues/257#issuecomment-164263215 . interval is just for active code, and if app is not wake up, it will not work. So how to use interval for background scheduling tasks?
Please DO NOT use this solution:
To use interval from RxJava you'll have to make sure your app's process stays alive. One way to do it is to put use the Observable in a foreground service. This is a bad idea because the service is NOT actively delivering value to the user. Waiting for time to pass is not delivering value for the user. Again please DO NOT use this.
AlarmManager and JobScheduler (or it's backport GcmNetworkManager) are far better choices for repeating background activities. If you use AlarmManager.setInexactRepeating() the system can batch jobs from multiple apps together to save battery. Using JobScheduler enables you to execute your background jobs in specific conditions, eg. when the device is connected to the internet or when battery is more than 20%. (Internet is required to check the weather).
interval from RxJava does have it's usage on Android. It's an excellent replacement for Runnable.postDelayed for relatively short durations. It makes the code shorter and more readable.
If you need to schedule a task that should be run even if app is not active anymore then use AlarmManager.
If you need to schedule a task that should be run only when app is active then you can use Observable.interval() and react on emission to execute some code and please don't forget to unsubscribe from the Observable when appropriate (when Activity is paused, etc) so app won't burn the battery!
I am developing a web crawler using Android. Currently my crawler crawls the web using asynctask every time the app starts, which takes a long time.
I want my app to update its database daily in the background, without needing to launch the MainActivity interface.
After doing some research, I found the following classes can help me:
Service
AlarmManager
Can someone shed some light for me, I'm new to Android programming.
Thanks
You should read this chapter: https://developer.android.com/training/best-background.html
You need an alarm manager to run the service every hour. You also need to receive a broadcast when the device reboots to start the alarm manager...
This can also help you: Alarm Manager Example
Below are some ways that you can go about doing job scheduling:
Android JobScheduler - Minimum API: 21
Firebase JobDispatcher - Minimum API: 9
evernote/android-job - Minimum API: 14
You can schedule it to run every X hours with other params like run when internet comes, battery should be above critical level. Check them out and make a decision according to your requirements.