location livedata (#3)

build.gradle

@@ -33,6 +33,7 @@ ext {
             retrofit      : '2.4.0',
             rxJava        : '2.2.2',
             rxAndroid     : '2.1.0',
-            crashlytics   : '2.9.5'
+            crashlytics   : '2.9.5',
+            location     : '16.0.0'
     ]
 }

livedata-location/.gitignore

@@ -0,0 +1 @@
+/build

livedata-location/build.gradle

@@ -0,0 +1,19 @@
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion versions.compileSdk
+
+    defaultConfig {
+        minSdkVersion 16
+    }
+
+}
+
+dependencies {
+    api project(":lifecycle")
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
+    implementation "com.google.android.gms:play-services-location:$versions.location"
+}

livedata-location/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<manifest
+    package="ru.touchin.livedata.location"/>

livedata-location/src/main/java/ru/touchin/livedata/location/LocationLiveData.kt

@@ -0,0 +1,61 @@
+package ru.touchin.livedata.location
+
+import android.Manifest.permission.ACCESS_COARSE_LOCATION
+import android.Manifest.permission.ACCESS_FINE_LOCATION
+import android.content.Context
+import android.location.Location
+import androidx.annotation.RequiresPermission
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import com.google.android.gms.location.FusedLocationProviderClient
+import com.google.android.gms.location.LocationAvailability
+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
+
+class LocationLiveData(
+        context: Context,
+        private val request: LocationRequest
+) : LiveData<Location>() {
+
+    private val fusedLocationClient: FusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(context)
+    private val locationCallback = object : LocationCallback() {
+        override fun onLocationResult(result: LocationResult) {
+            postValue(result.lastLocation)
+        }
+
+        override fun onLocationAvailability(availability: LocationAvailability) {
+            if (!availability.isLocationAvailable) postValue(null)
+        }
+    }
+
+    @RequiresPermission(anyOf = [ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION])
+    override fun observe(owner: LifecycleOwner, observer: Observer<in Location>) {
+        super.observe(owner, observer)
+    }
+
+    @RequiresPermission(anyOf = [ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION])
+    override fun onActive() {
+        startListening()
+    }
+
+    override fun onInactive() {
+        stopListening()
+    }
+
+    private fun stopListening() {
+        fusedLocationClient.removeLocationUpdates(locationCallback)
+    }
+
+    @RequiresPermission(anyOf = [ACCESS_COARSE_LOCATION, ACCESS_FINE_LOCATION])
+    private fun startListening() {
+        fusedLocationClient.requestLocationUpdates(
+                request,
+                locationCallback,
+                null
+        )
+    }
+
+}

modules.gradle

@@ -16,6 +16,7 @@ include ':views'
 include ':recyclerview-adapters'
 include ':kotlin-extensions'
 include ':templates'
+include ':livedata-location'
 
 project(':utils').projectDir = new File(rootDir, 'utils')
 project(':logging').projectDir = new File(rootDir, 'logging')
@@ -28,3 +29,4 @@ project(':views').projectDir = new File(rootDir, 'views')
 project(':recyclerview-adapters').projectDir = new File(rootDir, 'recyclerview-adapters')
 project(':kotlin-extensions').projectDir = new File(rootDir, 'kotlin-extensions')
 project(':templates').projectDir = new File(rootDir, 'templates')
+project(':livedata-location').projectDir = new File(rootDir, 'livedata-location')