'Broadcast Receiver not receiving AlarmManager intents after restarting WearOS device

I am trying to reboot my device and relaunch my alarm following this https://developer.android.com/training/scheduling/alarms#boot.

But unfortunately only the BOOT_COMPLETED action is received. Other intents from Alarm is not received.

During on BOOT_COMPLETED . I schedule my task for the alarm once again.

I also have confirmed using the command below

adb shell dumpsys alarm

That I still have the alarm after rebooting. but the when the alarm fires Broadcast receiver does not receive it.

Does anyone have an idea what I might missing? Thank you.

NOTE: If I use the same code without restarting the device. The alarm will be received by the Broadcast receiver. Issue only happens if I restart.

Here is the code for the Playground App im testing it on.

MainActivity

class MainActivity : Activity() {

    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        val receiver = ComponentName(applicationContext, BootReceiver::class.java)
        applicationContext.packageManager.setComponentEnabledSetting(
            receiver,
            PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
            PackageManager.DONT_KILL_APP
        )

        val prefs = getSharedPreferences("TEST_PREF", MODE_PRIVATE)
        binding.text.text = "Hello!! " + prefs.getString("message", "No message defined") //"No name defined" is the default value.

        Log.d("TESTER", "app loaded")


    }
}

BroadcastReceiver

class BootReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context?, intent: Intent?) {
        if(context == null) return
        if(intent == null) return

        if (intent.action == "android.intent.action.BOOT_COMPLETED") {
            // Set the alarm here.
            ScheduleManager.scheduleAlarm(context, TEST_TIME)
            Log.d("TESTER", "android.intent.action.BOOT_COMPLETED")
        } else {
            val message = intent.getStringExtra(MESSAGE_KEY)
            val editor: SharedPreferences.Editor = context.applicationContext.getSharedPreferences("TEST_PREF", MODE_PRIVATE).edit()
            editor.putString("message", message)
            editor.apply()
            Log.d("TESTER", "message from alarm received")
        }
    }
}

Alarm Manager

object ScheduleManager {

    const val MESSAGE_KEY = "message"

    const val TEST_TIME = 1647915300000L //2022-03-22 10:15:00

    fun scheduleAlarm(context: Context, time: Long) {
        val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val intent = Intent(context, BootReceiver::class.java)
        intent.putExtra(MESSAGE_KEY, "This is from the alarm $time")

        val pendingIntent = PendingIntent.getBroadcast(
            context,
            1111,
            intent,
            PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
        )

        alarmManager.setExactAndAllowWhileIdle(
            AlarmManager.RTC_WAKEUP,
            time,
            pendingIntent
        )
    }
}

Log Results

Launched the app at 2022-03-22 10:11:17.414

2022-03-22 10:11:17.414 4360-4360/com.wearosplayground D/TESTER: app loaded

proceeds rebooting WearOs device

Boot complete action received at 2022-03-22 10:13:49.586

2022-03-22 10:13:49.586 3576-3576/com.ausom.wearosplayground D/TESTER: android.intent.action.BOOT_COMPLETED

I have set the alarm at this time to be at 2022-03-22 10:15:00

but nothing happens

android wear-os

Solution 1:^[1]

const val TEST_TIME = 1647915300L //2022-03-22 10:15:00

Is specified as seconds.

You should change this to 1647915300000L

See

    println(java.util.Date(1647915300L)) //Tue Jan 20 01:45:15 UTC 1970

Solution 2:^[2]

Using this link as a reference, the solution using accessibility works.

BUT, this is not advisable as it accessibility is for disabled users. So for now the real solution I can think of is communicate with your WearOS device manufacturer and ask for whitelisting. Other than that we will need to continue resorting to tricks listed in the link I have shared.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2	Jan Kennu Paz

'Broadcast Receiver not receiving AlarmManager intents after restarting WearOS device

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]