From bd671d2c6c98576a237b86da68286bd06fb688a7 Mon Sep 17 00:00:00 2001
From: Jintin <jintin.lin1018@gmail.com>
Date: Mon, 16 Nov 2020 22:43:54 +0800
Subject: [PATCH] update readme of custom provider

---
 README.md                                     | 55 +++++++++++++++++++
 .../jintin/fancylocation/app/MainViewModel.kt | 22 ++++----
 2 files changed, 66 insertions(+), 11 deletions(-)

diff --git a/README.md b/README.md
index 893033d..da8abbd 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,61 @@ locationFlow.get().collect {
 
 ```
 
+## Custom Location Provider
+FancyLocationProvider using GMS as the default location provider as it serve the most use case.
+But you can also used it with any other provider you want like Huawei HMS. Just create the custom provider implement the `ILocationProvider` interface like this:
+```kotlin
+class LocationProvider(
+    private val context: Context,
+    private val locationRequest: LocationRequest
+) : ILocationProvider {
+
+    private val client by lazy {
+        LocationServices.getFusedLocationProviderClient(context)
+    }
+    private val locationListener by lazy {
+        LocationListener()
+    }
+    private var locationObserver: ILocationObserver? = null
+
+    @RequiresPermission(anyOf = [Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION])
+    override fun requestLocationUpdates(locationObserver: ILocationObserver) {
+        this.locationObserver = locationObserver
+        client.requestLocationUpdates(
+            locationRequest,
+            locationListener,
+            Looper.getMainLooper()
+        )
+    }
+
+    override fun removeLocationUpdates() {
+        client.removeLocationUpdates(locationListener)
+    }
+
+    inner class LocationListener : LocationCallback() {
+        override fun onLocationResult(result: LocationResult?) {
+            result?.lastLocation?.let {
+                locationObserver?.onLocationResult(it)
+            }
+        }
+
+        override fun onLocationAvailability(availability: LocationAvailability?) {
+            if (availability?.isLocationAvailable == false) {
+                locationObserver?.onLocationFailed()
+            }
+        }
+    }
+}
+```
+Then you can create the custom provider and transform it into LiveData or Flow.
+```kotlin
+private val locationProvider: ILocationProvider = LocationProvider(context, locationRequest)
+
+@ExperimentalCoroutinesApi
+val locationFlow: LocationFlow = locationProvider.asFlow()
+val locationLiveData: LocationLiveData = locationProvider.asLiveData()
+```
+
 ## Contributing
 Bug reports and pull requests are welcome on GitHub at [https://github.com/Jintin/FancyLocationProvider](https://github.com/Jintin/FancyLocationProvider).
 
diff --git a/app/src/main/java/com/jintin/fancylocation/app/MainViewModel.kt b/app/src/main/java/com/jintin/fancylocation/app/MainViewModel.kt
index e14f3f9..36142ab 100644
--- a/app/src/main/java/com/jintin/fancylocation/app/MainViewModel.kt
+++ b/app/src/main/java/com/jintin/fancylocation/app/MainViewModel.kt
@@ -3,8 +3,10 @@ package com.jintin.fancylocation.app
 import android.app.Application
 import androidx.lifecycle.AndroidViewModel
 import com.google.android.gms.location.LocationRequest
-import com.jintin.fancylocation.LocationFlow
-import com.jintin.fancylocation.LocationLiveData
+import com.jintin.fancylocation.ILocationProvider
+import com.jintin.fancylocation.LocationProvider
+import com.jintin.fancylocation.asFlow
+import com.jintin.fancylocation.asLiveData
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 
 class MainViewModel(application: Application) : AndroidViewModel(application) {
@@ -15,16 +17,14 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
             .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
 
 
-    @ExperimentalCoroutinesApi
-    val locationFlow = LocationFlow(application, locationRequest)
-    val locationLiveData = LocationLiveData(application, locationRequest)
-
-//    // we can also provide custom vendor by create your own LocationProvider
-//    private val locationProvider: ILocationProvider = LocationProvider(application, locationRequest)
-//
 //    @ExperimentalCoroutinesApi
-//    val locationFlow = locationProvider.asFlow()
-//    val locationLiveData = locationProvider.asLiveData()
+//    val locationFlow = LocationFlow(application, locationRequest)
+//    val locationLiveData = LocationLiveData(application, locationRequest)
 
+    // we can also provide custom vendor by create your own LocationProvider
+    private val locationProvider: ILocationProvider = LocationProvider(application, locationRequest)
 
+    @ExperimentalCoroutinesApi
+    val locationFlow = locationProvider.asFlow()
+    val locationLiveData = locationProvider.asLiveData()
 }
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