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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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90
app/src/google/java/com/geeksville/mesh/repository/location/SharedLocationManager.kt
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@ -1,90 +0,0 @@
package com.geeksville.mesh.repository.location
import android.annotation.SuppressLint
import android.content.Context
import android.location.Location
import android.os.Looper
import com.geeksville.mesh.android.GeeksvilleApplication
import com.geeksville.mesh.android.Logging
import com.geeksville.mesh.android.hasBackgroundPermission
import com.geeksville.mesh.android.isGooglePlayAvailable
import com.google.android.gms.location.LocationCallback
import com.google.android.gms.location.LocationRequest
import com.google.android.gms.location.LocationResult
import com.google.android.gms.location.LocationServices
import com.google.android.gms.location.Priority
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
private val desiredInterval = 30 * 1000L // 30 seconds
// Set up the Fused Location Provider and LocationRequest
private val fusedLocationClient = LocationServices.getFusedLocationProviderClient(context)
private val locationRequest = LocationRequest.Builder(desiredInterval)
.setMinUpdateIntervalMillis(desiredInterval / 2)
.setMaxUpdateDelayMillis(desiredInterval)
// .setMinUpdateDistanceMeters(30f) // 30 meters
.setPriority(Priority.PRIORITY_HIGH_ACCURACY)
.build()
@SuppressLint("MissingPermission")
private val _locationUpdates = callbackFlow {
val callback = object : LocationCallback() {
override fun onLocationResult(result: LocationResult) {
// info("New location: ${result.lastLocation}")
result.lastLocation?.let { lastLocation ->
trySend(lastLocation)
}
}
}
if (!context.hasBackgroundPermission() || !isGooglePlayAvailable(context)) close()
info("Starting location requests with interval=${desiredInterval}ms")
_receivingLocationUpdates.value = true
GeeksvilleApplication.analytics.track("location_start") // Figure out how many users needed to use the phone GPS
fusedLocationClient.requestLocationUpdates(
locationRequest,
callback,
Looper.getMainLooper()
).addOnFailureListener { ex ->
errormsg("Failed to listen to GPS error: ${ex.message}")
close(ex) // in case of exception, close the Flow
}
awaitClose {
info("Stopping location requests")
_receivingLocationUpdates.value = false
GeeksvilleApplication.analytics.track("location_stop")
fusedLocationClient.removeLocationUpdates(callback) // clean up when Flow collection ends
}
}.shareIn(
externalScope,
replay = 0,
started = SharingStarted.WhileSubscribed()
)
fun locationFlow(): Flow<Location> {
return _locationUpdates
}
}