I want to implement a feature in an android app, which periodically pulls information from a server even when the app is in the background / not running.
It should invoke a web service and check for updates at least 3-4 times in a day, and if available pull and show them in the notification bar. When the user clicks on the notification it should open up the app screen.
Is that feasible using pull notification technology? Are there any constraints? Can you share some tutorials that will help me implement this.
Thanks..
Sudo steps hope these helps you to go ahead.
Create One Service This service will call server and gets the
updated if available and generate the Notification.
Set Repeat Alarm using AlarmManger When application launches first
time every 8 hours that is 4 times in a day.
Create BroadCastReceiver which will called by alarm manager every 8
hours.
And From BroadcastReceive's onReceive() method start the Service for
data sync.
I pretend that you know AlarmMAnager,Service and BroadcastReceiver.
The working tutorial is Here
Thanks
Related
I searched through a lot of documentation and other answers but I cannot figure out what is the correct way to have a background service that performs some work and sends notifications. I found a lot of deprecated methods.
I don't want a foreground service that comes with a permanent notification on user's device.
I want a sort of live notification when something happens in my application like Whatsapp does when there are new messages.
I tried to set a standard service with the start_sticky clause, but what I got is that my service starts completely randomly. More or less Android decides to start my service once every 20 minutes.
This is not what I want. I want a service that is always vigilant like Whatsapp that sends a notification when it realizes that a message is present.
Can anyone provide to me a clear explanation and example, please?
I searched a lot, but couldn't find nothing clear. Every solution seems outdated. In my app, I need this simple task: the user can enable a daily reminder and select a time in the Time Picker.
Everyday in the selected hour the user should receive a simple notification. I only need to read the local database (Room, SQLite) and then show a notification.
I'm using AlarmManager, because the user should receive the notification in the exact time he selected.
Everthing is working fine when the app is open or minimized. When I close the app in the recently used apps (swipe up) I don't receive the notification.
I have a class that creates the alarm with this calling:
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), pendingIntent);
The pendingIntent opens a NotificationReceiver extends BroadcastReceiver class. In the onReceive method I read the db and show the notification. I also tried starting a service in the onReceive method (IntentService or Service) but they work exactly as just using the broadcast receiver.
I put the receiver in the AndroidManifest. Everything is working except when I close the app or restart the system (I registred the BOOT_COMPLETED in the manifest and I have another broadcast receiver that configure the alarm again. If I open the app and keep it open before the notification time, then I receive it. But if the app is still closed, I don't receive it. So I thik the BOOT_COMPLETED is working fine).
The other solutions doesn't seem to work. What can I do to have it working on Android 11 (Pixel 3 device)?
One example of what I need is the Google Keep app, but mine is simpler. I don't see any notification dot telling that the Google Keep is running in background. Still, I get the reminders on time. How the Google Keep works? It's a service always running (and killing the battery)? It uses AlarmManager and BroadcastReceiver? WorkManager? Even if a close the app or restart the phone, I always get the notifications. How can I achieve it on my app?
Not too experienced with mobile development, but I wanted to know if this was possible.
After the user installs the app (android or ios), the app should at least once a day "wake-up" and show a push notification to the user.
Is this possible?
If I understood you correctly, I believe that you need setup a recurring alarm using AlarmManager. You also need to setup starting alarm service on device reboot. You can write a method that does what you want so it get executed when the alarm runs e.g. show notification. The following links should help you:
Repeat Alarm Example In Android Using AlarmManager
I'm trying to implement an App that will perform a periodic sync w/ server, lets say ever 30 min. I have been successfully able to implement this using a Receiver & Service triggered via AlarmManager, however the downside is that if the App is closed through TaskMgr the alarm dies with it.
I understand that this is expected behavior for Android OS, however I noticed that some Apps like Facebook have a service that starts back up after a short timeout even if the Facebook App was closed in TaskMgr. I monitored this and see the service disappear and re-start after about a minute or so. There's a number of Apps that behave in similar fashion (Twitter, Dictionary, ReadItLater, etc)
I would like to reproduce this behavior. This way even if the user closes my App in TaskMgr by mistake they can still have periodic sync run in the background.
Thanks in advance.
There should be an inbound process associated with the service if it needs to be restarted even after cloasing using task killers.YOu can achieve this by displaying an ongoing notification at notification area as long as service exists and by launching service via startForeground()
http://www.androiddiscuss.com/1-android-discuss/91804.html
please check the link
I want to implement push notification in android.
I have search for push notification and know that for push notification I have to use C2DM.
For use of C2DM I have to keep connection live from my device. I want to get a counter from website when a counter changed.For that I have made a service and I am starting that service in every 5 minutes interval time.
So is it proper way to start service at every 5 minutes or I have to use C2DM?
Broadcast receiver is opt for push notification .
Look at here
I was want to get counter from webservice and want to update in application when ever it changed for that I had write a service and its work to make connection to webservice and get a count.I am starting this service at every 10 or 15 minutes and after getting counter i am dismissing this service and schedule after next 10 minutes.It is working fine for me.