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refactor: consolidate location APIs into LocationManagerCompat

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andrekir 2024-01-10 06:25:54 -03:00 • committed by Andre K
parent 0e3939f378
commit 8f5400c33b
5 changed files with 81 additions and 195 deletions
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91
app/src/fdroid/java/com/geeksville/mesh/repository/location/SharedLocationManager.kt
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@ -1,91 +0,0 @@
package com.geeksville.mesh.repository.location
import android.annotation.SuppressLint
import android.content.Context
import android.location.Location
import android.location.LocationManager
import androidx.core.location.LocationListenerCompat
import com.geeksville.mesh.android.GeeksvilleApplication
import com.geeksville.mesh.android.Logging
import com.geeksville.mesh.android.hasBackgroundPermission
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.channels.awaitClose
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.SharingStarted
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.callbackFlow
import kotlinx.coroutines.flow.shareIn
/**
* Wraps LocationCallback() in callbackFlow
*
* Derived in part from https://github.com/android/location-samples/blob/main/LocationUpdatesBackgroundKotlin/app/src/main/java/com/google/android/gms/location/sample/locationupdatesbackgroundkotlin/data/MyLocationManager.kt
* and https://github.com/googlecodelabs/kotlin-coroutines/blob/master/ktx-library-codelab/step-06/myktxlibrary/src/main/java/com/example/android/myktxlibrary/LocationUtils.kt
*/
class SharedLocationManager constructor(
private val context: Context,
externalScope: CoroutineScope
) : Logging {
private val _receivingLocationUpdates: MutableStateFlow<Boolean> = MutableStateFlow(false)
val receivingLocationUpdates: StateFlow<Boolean> get() = _receivingLocationUpdates
// Defaults from device positionBroadcastSmart
private val timeTravelMinimum = 30 * 1000L // 30 seconds
private val distanceTravelMinimum = 0f
@SuppressLint("MissingPermission")
private val _locationUpdates = callbackFlow {
val locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
val callback = LocationListenerCompat { location ->
// info("New location: $location")
trySend(location)
}
if (!context.hasBackgroundPermission()) close()
val providerList = buildList {
val providers = locationManager.allProviders
if (android.os.Build.VERSION.SDK_INT >= 31 && LocationManager.FUSED_PROVIDER in providers) {
add(LocationManager.FUSED_PROVIDER)
} else {
if (LocationManager.NETWORK_PROVIDER in providers) add(LocationManager.NETWORK_PROVIDER)
if (LocationManager.GPS_PROVIDER in providers) add(LocationManager.GPS_PROVIDER)
}
}
info("Starting location updates with $providerList minTimeMs=${timeTravelMinimum}ms and minDistanceM=${distanceTravelMinimum}m")
_receivingLocationUpdates.value = true
GeeksvilleApplication.analytics.track("location_start") // Figure out how many users needed to use the phone GPS
try {
providerList.forEach { provider ->
locationManager.requestLocationUpdates(
provider,
timeTravelMinimum,
distanceTravelMinimum,
callback,
context.mainLooper
)
}
} catch (e: Exception) {
close(e) // in case of exception, close the Flow
}
awaitClose {
info("Stopping location requests")
_receivingLocationUpdates.value = false
GeeksvilleApplication.analytics.track("location_stop")
locationManager.removeUpdates(callback) // clean up when Flow collection ends
}
}.shareIn(
externalScope,
replay = 0,
started = SharingStarted.WhileSubscribed()
)
fun locationFlow(): Flow<Location> {
return _locationUpdates
}
}