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Merge pull request #14 from Rallista/location-tracking-camera
Location tracking camera
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41 changes: 0 additions & 41 deletions
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app/src/main/java/com/maplibre/example/support/StaticLocationEngine.kt
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124 changes: 124 additions & 0 deletions
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compose/src/main/java/com/maplibre/compose/StaticLocationEngine.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| package com.maplibre.compose | ||
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|
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| import android.app.PendingIntent | ||
| import android.content.Intent | ||
| import android.location.Location | ||
| import android.location.LocationManager | ||
| import android.os.Handler | ||
| import android.os.Looper | ||
| import com.mapbox.mapboxsdk.location.engine.LocationEngine | ||
| import com.mapbox.mapboxsdk.location.engine.LocationEngineCallback | ||
| import com.mapbox.mapboxsdk.location.engine.LocationEngineRequest | ||
| import com.mapbox.mapboxsdk.location.engine.LocationEngineResult | ||
| import java.lang.Exception | ||
| import java.util.Timer | ||
| import java.util.TimerTask | ||
|
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| /** | ||
| * A simple class that provides static location updates to a MapLibre view. | ||
| * | ||
| * This is not driven by a location provider (such as the Google fused client), but rather by | ||
| * updates provided one at a time. | ||
| * | ||
| * Beyond the obvious use case in testing and Compose previews, this is also useful if you are doing | ||
| * some processing of raw location data (ex: determining whether to snap locations to a road) and | ||
| * selectively passing the updates on to the map view. You can provide a new location by setting the | ||
| * ``lastLocation`` property. | ||
| * | ||
| * This class does not ever perform any authorization checks. That is the responsibility of the | ||
| * caller. | ||
| */ | ||
| class StaticLocationEngine : LocationEngine { | ||
| @Volatile | ||
| var lastLocation: Location? = null | ||
| @Synchronized set | ||
|
|
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| private var callbackTimer: Timer? = null | ||
| private val callbacks: MutableList<Pair<Handler, LocationEngineCallback<LocationEngineResult>>> = | ||
| mutableListOf() | ||
|
|
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| private var pendingIntentTimer: Timer? = null | ||
| private val pendingIntents: MutableList<PendingIntent> = mutableListOf() | ||
|
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| override fun getLastLocation(callback: LocationEngineCallback<LocationEngineResult>) { | ||
| val loc = lastLocation | ||
| if (loc != null) { | ||
| callback.onSuccess(LocationEngineResult.create(loc)) | ||
| } else { | ||
| callback.onFailure(Exception("No location set")) | ||
| } | ||
| } | ||
|
|
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| override fun requestLocationUpdates( | ||
| request: LocationEngineRequest, | ||
| callback: LocationEngineCallback<LocationEngineResult>, | ||
| looper: Looper? | ||
| ) { | ||
| // Register the callback | ||
| callbacks.add(Pair(Handler(looper ?: Looper.getMainLooper()), callback)) | ||
| if (callbackTimer == null) { | ||
| // If a timer isn't already running, create one | ||
| callbackTimer = | ||
| Timer().apply { | ||
| scheduleAtFixedRate( | ||
| object : TimerTask() { | ||
| override fun run() { | ||
| lastLocation?.let { | ||
| val result = LocationEngineResult.create(it) | ||
| for ((handler, callback) in callbacks) { | ||
| handler.post { callback.onSuccess(result) } | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| 0, | ||
| 1000) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| override fun requestLocationUpdates( | ||
| request: LocationEngineRequest, | ||
| pendingIntent: PendingIntent? | ||
| ) { | ||
| if (pendingIntent != null) { | ||
| pendingIntents.add(pendingIntent) | ||
| if (pendingIntentTimer == null) { | ||
| // If a timer isn't already running, create one | ||
| pendingIntentTimer = | ||
| Timer().apply { | ||
| scheduleAtFixedRate( | ||
| object : TimerTask() { | ||
| override fun run() { | ||
| lastLocation?.let { | ||
| for (intent in pendingIntents) { | ||
| val update = Intent() | ||
| update.putExtra(LocationManager.KEY_LOCATION_CHANGED, it) | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| 0, | ||
| 1000) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| override fun removeLocationUpdates(callback: LocationEngineCallback<LocationEngineResult>) { | ||
| callbacks.removeIf { it.second == callback } | ||
| if (callbacks.isEmpty()) { | ||
| callbackTimer?.cancel() | ||
| callbackTimer = null | ||
| } | ||
| } | ||
|
|
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| override fun removeLocationUpdates(intent: PendingIntent?) { | ||
| pendingIntents.remove(intent) | ||
| if (pendingIntents.isEmpty()) { | ||
| pendingIntentTimer?.cancel() | ||
| pendingIntentTimer = null | ||
| } | ||
| } | ||
| } |
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