I am working with geofences based on this Google sample. However, I am finding that geofence transitions are not occurring accurately in the background unless I am in Google Maps or a different location based app. Because of this I am attempting to turn the JobIntentService into a foreground service that will receive its own regular location updates.
Could someone explain the lifecycle of the JobIntentService and the order in which the methods are called when it is created?
Keep in mind I am using the following classes:
class GeofenceBroadcastReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
GeofenceTransitionsJobIntentService.enqueueWork(context, intent)
}
}
class GeofenceTransitionsJobIntentService : JobIntentService() {
companion object {
private const val JOB_ID = 573
// Convenience method
fun enqueueWork(context:Context, intent:Intent) {
enqueueWork(context, GeofenceTransitionsJobIntentService::class.java, JOB_ID, intent)
}
}
onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
// Make notification and start as a foreground service
return START_STICKY
}
onHandleWork(intent: Intent) {
// Handle the geofences
}
Related
Since AsyncTask, IntentSerrvice and JobIntentService are all deprecated, which tool or class should I go for in 2022?
I want to re-schedule alarms in a BroadcastReceiver after a device rebooted (since alarms get lost in the process). The task will most probably take < 1 min to finish. I just need the safety of it completing and not being killed off by the system.
The documentation on Broadcasts shows an (outdated) example with goAsync() and the deprecated AsyncTask.
But it also mentions JobService. Is that the replacement? What about WorkManager?
goAsync() return a PendingIntent - it mean you ask for android system extend time life of Broadcast receiver => goAsync() is used for short background task.
Life time of BroadcastReceiver is very short, so... for long time background task, you must to change to other context has longer life time, such as: Service, JobService..etc.
Example:
BroadcastReceiver received intent
BroadcastReceiver start a service, run worker thread to process long time task
after worker thread finish, call finish service too
=========================================
class MyIntentService : Service() {
private val handleThread = HandlerThread("MyThread")
private lateinit var workerHandler: Handler
override fun onCreate() {
super.onCreate()
handleThread.start()
workerHandler = Handler(handleThread.looper)
}
override fun onDestroy() {
workerHandler.removeCallbacksAndMessages(null)
handleThread.quitSafely()
super.onDestroy()
}
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
val data = intent?.data
workerTask(data)
return START_NOT_STICKY
}
private fun workerTask(data: Uri?) {
workerHandler.post {
heavyTask(data)
finishMyIntentService()
}
}
private fun finishMyIntentService() {
stopSelf()
}
private fun heavyTask(data: Uri?) {
// to do heavyTask example
for (i in 1..20)
{
Log.d("test","#heavyTask() $i")
Thread.sleep(1000)
}
}
override fun onBind(intent: Intent?): IBinder? {
TODO("Not yet implemented")
}
}
then startService from BroadCastReceiver
I'm making a todolist app where the user needs to add a task along with date and time that i use later to trigger the notification , when app is in foreground , it works fine but since services are submitted to limitations after android oreo , now i'm lost on how to trigger the notification when app is in background or killed , if you guys could enlighten me , i woudl appreciate it
This is my service class
class NotificationService(var context: FragmentActivity) : Service(){
private lateinit var remindersViewModel: remindersViewModel
private lateinit var compat : NotificationManagerCompat
override fun onCreate() {
super.onCreate()
compat = NotificationManagerCompat.from(this)
remindersViewModel = ViewModelProvider(context)[remindersViewModel::class.java]
}
override fun onBind(intent: Intent?): IBinder? {
return null
}
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
isNotificationEnabled()
return START_NOT_STICKY
}
override fun onDestroy() {
super.onDestroy()
}
private fun isNotificationEnabled(){
//TODO : NOTIFICATION
val notificationPrefs = getSharedPreferences("notificationPrefs", Context.MODE_PRIVATE)
val isNotificationEnabled = notificationPrefs.getBoolean("notification", false)
remindersViewModel.getAllTasks().observe(context, Observer {
if(isNotificationEnabled){
CoroutineScope(Dispatchers.Main).launch {
delay(3000)
HandleOperations.taskNotification(it, context, compat)
}
}
})
}
}
As of Android Oreo, all background services will be killed if not visible by a foreground service. The best case scenario for your problem is to use a Job Scheduler (here).
For timely event based tasks Job Sceduler is the only options though it's no longer available in the support library.
You will also need a Notification Channel for devices with Oreo and above.
I have an Intent service & a BroadcastReceiver.
As per background limitation on Android Oreo & above, the background applications(when an application is not foreground ) cannot use the started service. When you call startService() method from the background applications simply through the IllegalStateException.
But In my case, My intent service is running properly even when the app is in the background.
I am using ADB cmd to trigger broadcast.
Please correct where I am missing.
adb shell am broadcast -a android.intent.action.TEST --es maxCountValue 10 -n com.example.servicedemo/.MyReceiver
enter code here
BroadcastReceiver class
class MyReceiver : BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
Toast.makeText(context, "CompleteReceiver", Toast.LENGTH_LONG).show()
if (intent!!.action.equals("android.intent.action.TEST")) {
val mIntent = Intent(context, MyIntentService::class.java).apply {
Log.v("MyIntentService", intent.data.toString())
this.putExtra("maxCountValue", 100)
}
context?.startService(mIntent)
}
}
}
Intent Service
private const val SERVICE_NAME = "MyIntentService"
class MyIntentService : IntentService(SERVICE_NAME) {
private val handler = Handler()
override fun onCreate() {
super.onCreate()
showToast("Job Execution Started")
}
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
showToast("Job Execution onStartCommand")
return super.onStartCommand(intent, flags, startId)
}
override fun onDestroy() {
super.onDestroy()
showToast("Job Execution onDestroy")
}
override fun onHandleIntent(intent: Intent?) {
val maxCount = intent!!.getIntExtra("maxCountValue", -1)
for (i in 0 until maxCount) {
Log.d(SERVICE_NAME, "onHandleWork: The number is: $i")
try {
Thread.sleep(100)
} catch (e: InterruptedException) {
Log.d(SERVICE_NAME, "Exception: ")
e.printStackTrace()
}
}
}
private fun showToast(msg: String) {
handler.post {
Toast.makeText(this#MyIntentService, msg, Toast.LENGTH_LONG).show()
}
}
}
Manifest :
<service android:name=".MyIntentService"/>
<receiver android:name=".MyReceiver">
<intent-filter>
<action android:name="android.intent.action.TEST" />
</intent-filter>
</receiver>
"The definition of background for purposes of service limitations is distinct from the definition used by memory management; an app might be in the background as pertains to memory management, but in the foreground as pertains to its ability to launch services."
-
https://developer.android.com/about/versions/oreo/background
PS that's the whole purpose of services
I have a service which started by on booted completed event it, but the app crashes with the error message as in above. Please help on how can I start my Service on BroadCast receiver event of Boot_Completed.
MyService.kt
class MyService : Service() {
override fun onCreate() {
Log.d(TAG, "onCreate")
}
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
return START_STICKY
}
override fun onBind(intent: Intent?): IBinder? {
return null
}
override fun onDestroy() {
Log.d(TAG, "DO SOME STAFF")
}
}
MyBroadCaster.kt
class StartRelayServiceAtBootReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
if (Intent.ACTION_BOOT_COMPLETED == intent.action) {
val serviceIntent = Intent(context, MyService::class.java)
context.startService(serviceIntent)
}
}
}
Upon some searching I got the answer that I had to check the SDK version that I can then start it as foreground service or just with starteService;
class StartRelayServiceAtBootReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
if (Intent.ACTION_BOOT_COMPLETED == intent.action) {
val intent = Intent(context, MyService::class.java)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
context.startForegroundService(intent)
} else {
context.startService(intent)
}
Log.i("Autostart", "started")
}
}
}
There are limitations on apps in the background. Obviously, if the device just booted, all apps are "in the background". You cannot start a Service from a background app. You probably need to use JobScheduler to to what you want.
See this document for a discussion about the limitations on background apps and how to migrate to other solutions that are allowed:
https://developer.android.com/about/versions/oreo/background
I've created custom broadcast receiver to listen for battery changes (I would like to monitor the percentage level of the battery)
However I'm not getting any updates. Here is my setup:
class MyService : IntentService("MyService") {
val receiver: PowerConnectionReceiver = PowerConnectionReceiver()
override fun onHandleIntent(intent: Intent?) {
Timber.d("Service started now")
}
override fun onCreate() {
val batteryStatus: Intent? =
IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { ifilter ->
registerReceiver(receiver, ifilter)
}
}
class PowerConnectionReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
val status: Int = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1)
Timber.d("Battery changed")
}
}
}
You will receive updates for the < 1 millisecond time that your IntentService is running. Your IntentService shuts down as soon as onHandleIntent() returns. IntentService is designed for short-term transactional sorts of work, not long-term operation.
Switch to a regular Service. Make sure that it is a foreground service (using startForeground()), as otherwise it will only run for 1 minute on Android 8.0+.