Android Direct Boot と Doze Mode と ForegroundService を制覇してアラームを鳴らしたい

1. Android Direct Boot
@irgaly
2019/07/11
HealthTech 0.5#3
@TIMESHARING

2. Summary
• About O:SLEEP
• O:SLEEP Alarm
•
• Android AlarmManager
• Android Doze Mode
• Alarm
• Alarm 1 ~ 3
• Android Direct Boot
•
• Foreground Service
• Direct Boot +
• Conclusion: Problems & Solutions

3. About O:SLEEP
•
• Android / iOS
•
•
https://play.google.com/store/apps/details?id=jp.oinc.osleep&hl=ja

4. O:SLEEP Alarm
• 2019/6/24 v1.3.0:
•
•

5. O:SLEEP Alarm
•
•
•
•

6. • AlarmManager Intent
•
AlarmManager
setAlarmClock()
PendingIntent Broadcast Intent
O:SLEEP
Notification
Manager
MediaPlayer
Vibrator

7. AlarmManager
• setExactAndAllowWhileIdle
• API 23 (Android 6.0)~
• “it will not dispatch these alarms more than about every minute (at which
point every such pending alarm is dispatched); when in low-power idle modes
this duration may be significantly longer, such as 15 minutes.”
• Exact 1 ( )
• → Doze Mode ( )
AlarmManagerCompat

8. AlarmManager
• setAlarmClock
• Doze Mode ( )
• API 21 (Android 5.0) ~
•
AlarmManagerCompat

9. Doze Mode
•
• Android 6.0 Doze
•
•
•
•
https://developer.android.com/training/monitoring-device-state/doze-
standby?hl=JA
Alarm Notification
Job

10. Alarm
•
•
•
1
•
•
setAlarmClock() setAlarmClock() setAlarmClock()

11. Alarm 1
•
setAlarmClock() setAlarmClock()
7:00
GMT+09:00 -> 2019/07/11 07:00 +09:00
GMT+08:00 -> 2019/07/11 07:00 +08:00 ←1
( )
<intent-filter>
<action android:name="android.intent.action.TIME_SET"/>
<action android:name=“android.intent.action.TIMEZONE_CHANGED"/>
…

12. Alarm 2
• AlarmManager
•
• System Locked Boot (Direct Boot, )
• System Boot (Locked Boot )
Locked Boot
setAlarmClock()
<intent-filter>
<action android:name="android.intent.action.LOCKED_BOOT_COMPLETED"/>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
…
System Boot
setAlarmClock()

13. Alarm 3
•
• (Broadcast)
•
•
•
setAlarmClock()
<intent-filter>
<action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
…
setAlarmClock()

14. merge
<intent-filter>
<action android:name="android.intent.action.LOCKED_BOOT_COMPLETED"/>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
<action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
<action android:name="android.intent.action.PACKAGE_DATA_CLEARED"/>
<action android:name="android.intent.action.TIME_SET"/>
<action android:name="android.intent.action.TIMEZONE_CHANGED"/>
</intent-filter>
Locked Boot System Boot

15. Direct Boot
•
•
https://developer.android.com/training/articles/direct-boot

16. Direct Boot
• Context Context
• createDeviceProtectedStorageContext Context
Direct Boot
•
fun AlarmRoomDatabase(application: Application):
AlarmRoomDatabase {
// Android 7.0 Direct Boot Context
val context = ContextCompat
.createDeviceProtectedStorageContext(application)
?: application
return Room.databaseBuilder(
context,
AlarmRoomDatabase::class.java,
“AlarmRoomDatabase"
).build()
}

17. Direct Boot
• LOCKED_BOOT_COMPLETED BroadcastReceiver
• android:directBootAware=“true”: Direct Boot
BroadcastReceiver Service
<receiver
android:name=".app.receiver.SystemEventBroadcastReceiver"
android:directBootAware="true"
tools:targetApi="n">
<intent-filter>
<action
android:name="android.intent.action.LOCKED_BOOT_COMPLETED"/>
…
</receiver>
<service
android:name=".app.service.AlarmService"
android:directBootAware="true"
tools:targetApi="n"/>

18. Direct Boot
• Context
Preferences Database
Direct Boot
Context
Context OK

19. •
•
AlarmSetting
Room SQLite Database
AlarmSchedule
Room SQLite Database
@Entity
data class AlarmSetting(
@PrimaryKey val id: String,
@Embedded(prefix = "time_") val time:
LocalTime,
val repeatDayOfWeek: Set<DayOfWeek>,
val enabled: Boolean,
…
@Entity
data class AlarmSchedule(
@PrimaryKey val id: String,
val alarmSettingId: String,
val time: DateTimeTz,
…
)

20. Foreground Service
• MediaPlayer
• Android 8.0
• Foreground Service
Android OS
BroadcastReceiverOSLEEP
ForegroundService
ForegroundNotification

21. Foreground Service
• Notification Channel
• ForegroundNotification
@RequiresApi(Build.VERSION_CODES.O)
private fun createNotificationChannel(channel: ChannelType) {
notificationManager.createNotificationChannel(
NotificationChannel(
"alarm",
" ",
NotificationManager.IMPORTANCE_MAX
).apply {
lockscreenVisibility = Notification.VISIBILITY_PUBLIC
}
)
}
class AlarmForegroundService : DaggerService() {
…
override fun onCreate() {
super.onCreate()
startForeground(0, NotificationCompat.Builder(context, "")
.setOngoing(true) //
.setContentTitle(context.getString(R.string.title_alarm_notification))
.setContentText(context.getString(R.string.text_alarm_notification))
.setSmallIcon(R.drawable.ic_notification)
.setCategory(Notification.CATEGORY_ALARM)
.setPriority(PRIORITY_MAX)
.setVisibility(VISIBILITY_PUBLIC)
.setContentIntent(
PendingIntent.getBroadcast(…)
).build())
}
…

22. Foreground Service
• MediaPlayer
private var _player: MediaPlayer? = null
private val player: MediaPlayer get() {
return _player ?: MediaPlayer().apply {
setWakeMode(context, PowerManager.PARTIAL_WAKE_LOCK)
}.also {
_player = it
}
}
override suspend fun playAlarm(soundUrl: String, repeat: Boolean) =
suspendCoroutine<Unit> { continuation ->
player.apply {
reset()
setDataSource(context, Uri.parse(soundUrl))
isLooping = repeat
setAudioAttributes(
AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ALARM)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build()
)
prepare()
start()
}
continuation.resume(Unit)
}

23. Foreground Service
• Vibrator
private val vibrator by lazy {
context.getSystemService<Vibrator>() ?: throw
RuntimeException("Vibrator ")
}
override fun vibrateAlarmRepeat(vibrateTime: TimeSpan, pauseTime:
TimeSpan) {
// OFF 0, ON , OFF... list
val pattern = listOf(0L, vibrateTime.millisecondsLong,
pauseTime.millisecondsLong)
if (Build.VERSION_CODES.O <= Build.VERSION.SDK_INT) {
vibrator.vibrate(
VibrationEffect.createWaveform(
pattern.toLongArray(),
0
),
AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ALARM)
.build()
)
} else {
vibrator.vibrate(
pattern.toLongArray(),
0,
AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ALARM)
.build()
)
}
}
TimeSpan https://github.com/korlibs/klock

24. : Direct Boot +
• Direct Boot Media Content Provider
• File Path
• MediaColumns.DATA File Path
private fun getSystemAlarms(): List<AlarmSound> {
return context.contentResolver.query(
MediaStore.Audio.Media.INTERNAL_CONTENT_URI,
null,
"${MediaStore.Audio.Media.IS_ALARM} != 0",
null,
"${MediaStore.Audio.Media.TITLE} ASC"
)?.use { cursor ->
cursor.asSequence().map {
AlarmSound(
it.getString(it.getColumnIndex(MediaStore.Audio.Media.TITLE)),
it.getString(it.getColumnIndex(MediaStore.MediaColumns.DATA))
)
}.toList()
} ?: emptyList()
}
fun Cursor.asSequence(): Sequence<Cursor> {
return generateSequence(seed = takeIf { it.moveToFirst() }) {
takeIf { it.moveToNext() }
}
}

25. Conclusion: Problems & Solutions
• AlarmManager
• →
• Doze Mode
• → setAlarmClock
• Direct Boot
• → createDeviceProtectedStorageContext
•
• → Foreground Service