IssueTracker

For app uses state you can use usageStatsManager.queryEvent for get accurate result use below code

val stateMap = HashMap<String, AppStateModel>() val usageStatsManager = getSystemService(USAGE_STATS_SERVICE) as UsageStatsManager

    val calendar: Calendar = Calendar.getInstance()
    calendar.set(Calendar.HOUR_OF_DAY,0)
    calendar.set(Calendar.MINUTE,0)
    calendar.set(Calendar.SECOND,0)

    val calenderEnd = Calendar.getInstance()
    calenderEnd.set(Calendar.HOUR_OF_DAY,23)
    calenderEnd.set(Calendar.MINUTE,59)
    calenderEnd.set(Calendar.SECOND,59)

    val eventList = usageStatsManager.queryEvents(calendar.timeInMillis, calenderEnd.timeInMillis)
    while(eventList.hasNextEvent()) {
        val event = UsageEvents.Event()
        eventList.getNextEvent(event)
        if (event.eventType == UsageEvents.Event.ACTIVITY_RESUMED) {
            val packageCheck = stateMap[event.packageName]
            if (packageCheck != null) {
                if (stateMap[event.packageName]!!.calssMap[event.className] != null) {
                    stateMap[event.packageName]!!.className = event.className
                    stateMap[event.packageName]!!.startTime = event.timeStamp
                    stateMap[event.packageName]!!.calssMap[event.className]!!.startTime = event.timeStamp
                    stateMap[event.packageName]!!.calssMap[event.className]!!.isResume = true
                } else {
                    stateMap[event.packageName]!!.className = event.className
                    stateMap[event.packageName]!!.startTime = event.timeStamp
                    stateMap[event.packageName]!!.calssMap[event.className] = BoolObj(event.timeStamp, true)
                }
            } else {
                val appStates = AppStateModel(packageName = event.packageName, className = event.className, startTime = event.timeStamp)
                appStates.calssMap[event.className] = BoolObj(event.timeStamp, true)
                stateMap[event.packageName] = appStates
            }
        }else if (event.eventType == UsageEvents.Event.ACTIVITY_STOPPED){
            val packageCheck = stateMap[event.packageName]
            if (packageCheck != null) {
                if (stateMap[event.packageName]!!.calssMap[event.className] != null) {
                    stateMap[event.packageName]!!.totalTime += event.timeStamp - stateMap[event.packageName]!!.calssMap[event.className]!!.startTime
                    stateMap[event.packageName]!!.calssMap[event.className]!!.isResume = false
                }
            }
        }
    }
    batteryAppsList.addAll(stateMap.values.toList())

data class AppStateModel( val packageName: String, var startTime: Long = 0, var endTime: Long = 0, var totalTime : Long = 0, var totalCapacity : Double = 0.0, var currentCapacity: Double = 0.0, var isAlreadyResume : Boolean = false, var className : String = "", var calssMap : HashMap<String, BoolObj> = HashMap() )

data class BoolObj(var startTime: Long, var isResume: Boolean)