Merge pull request #87 from NativeScript/tachev/add-background-location-demo

Added a background service for tosting the current location each 3 seconds in the Demo app

Author: lini

demo/app/App_Resources/Android/AndroidManifest.xml

@@ -3,7 +3,6 @@
 	package="__PACKAGE__"
 	android:versionCode="1"
 	android:versionName="1.0">
-
 	<supports-screens
 		android:smallScreens="true"
 		android:normalScreens="true"
@@ -25,6 +24,11 @@
 		android:label="@string/app_name"
 		android:theme="@style/AppTheme">
 
+
+		<service android:name="com.nativescript.location.BackgroundService" 
+			android:exported="false" >
+		</service>
+
 		<activity
 			android:name="com.tns.NativeScriptActivity"
 			android:label="@string/title_activity_kimera"

demo/app/App_Resources/Android/app.gradle

@@ -14,10 +14,3 @@ android {
     additionalParameters "--no-version-vectors"  
   }  
 } 
-
-def settingsGradlePath = "$projectDir/../../app/App_Resources/Android/settings.gradle";
-def settingsGradleFile = new File(settingsGradlePath);
-if(settingsGradleFile.exists())
-{
-    apply from: settingsGradleFile;
-}

demo/app/App_Resources/Android/settings.gradle

@@ -0,0 +1,45 @@
+import * as geolocation from "nativescript-geolocation";
+import { Accuracy } from "tns-core-modules/ui/enums";
+import * as application from "tns-core-modules/application";
+import * as Toast from "nativescript-toast";
+
+if (application.android) {
+    (<any>android.app.Service).extend("com.nativescript.location.BackgroundService", {
+        onStartCommand: function (intent, flags, startId) {
+            this.super.onStartCommand(intent, flags, startId);
+            return android.app.Service.START_STICKY;
+        },
+        onCreate: function () {
+            geolocation.enableLocationRequest().then(function () {
+                geolocation.watchLocation(
+                    function (loc) {
+                        if (loc) {
+                            let toast = Toast.makeText('Background Location: ' + loc.latitude + ' ' + loc.longitude);
+                            toast.show();
+                            console.log('Background Location: ' + loc.latitude + ' ' + loc.longitude);
+                        }
+                    },
+                    function (e) {
+                        console.log("Background watchLocation error: " + (e.message || e));
+                    },
+                    {
+                        desiredAccuracy: Accuracy.high,
+                        updateDistance: 0.1,
+                        updateTime: 3000,
+                        minimumUpdateTime: 100
+                    });
+            }, function (e) {
+                console.log("Background enableLocationRequest error: " + (e.message || e));
+            });
+        },
+        onBind: function (intent) {
+            console.log("on Bind Services");
+        },
+        onUnbind: function(intent){
+            console.log('UnBind Service');
+        },
+        onDestroy: function() {
+            console.log('service onDestroy');
+        }
+    });
+}

demo/app/App_Resources/Android/settings.json

@@ -3,16 +3,28 @@ import { Accuracy } from "ui/enums";
 import { EventData } from "data/observable";
 import { Page } from "ui/page";
 import { MainViewModel } from "./main-view-model";
+const utils = require("tns-core-modules/utils/utils");
+import * as application from "tns-core-modules/application";
+let locationService = require('./background-service');
 
 let page: Page;
 let model = new MainViewModel();
 let watchIds = [];
+declare var com: any;
 
 export function pageLoaded(args: EventData) {
     page = <Page>args.object;
     page.bindingContext = model;
 }
 
+export function startBackgroundTap() {
+    if (application.android) {
+        let context = utils.ad.getApplicationContext();
+        let intent = new android.content.Intent(context, com.nativescript.location.BackgroundService.class);
+        context.startService(intent);
+    }
+}
+
 export function enableLocationTap() {
     geolocation.isEnabled().then(function (isEnabled) {
         if (!isEnabled) {

demo/app/background-service.ts

@@ -1,16 +1,19 @@
 <Page xmlns="http://schemas.nativescript.org/tns.xsd" loaded="pageLoaded" class="page">
-  <GridLayout rows="auto, *, auto">
+  <GridLayout rows="auto, auto, *, auto">
         <GridLayout row="0" columns="*, *, *, *" >
             <Button text="Enable Location" col="0" textWrap="true" tap="enableLocationTap"/>
             <Button text="Get Current Location" col="1" textWrap="true" tap="buttonGetLocationTap"/>
             <Button text="Start Monitoring" col="2" textWrap="true" tap="buttonStartTap"/>
             <Button text="Stop Monitoring" col="3" textWrap="true" tap="buttonStopTap"/>
         </GridLayout>
-        <ListView row="1" items="{{ locations }}">
+        <GridLayout row="1" columns="*" >
+            <Button text="Start Background thread monitoring" col="0" ios:visibility="collapsed" textWrap="true" tap="startBackgroundTap"/>
+        </GridLayout>
+        <ListView row="2" items="{{ locations }}">
             <ListView.itemTemplate>
                 <Label text="{{ $value, latitude + ', ' + longitude + ', ' + altitude }}" />
             </ListView.itemTemplate>
         </ListView>
-        <Button text="Clear" row="2" tap="buttonClearTap"/>
+        <Button text="Clear" row="3" tap="buttonClearTap"/>
     </GridLayout>
 </Page>

demo/app/main-page.ts

@@ -11,6 +11,7 @@
   "dependencies": {
     "nativescript-geolocation": "../src",
     "nativescript-theme-core": "^1.0.4",
+    "nativescript-toast": "^1.4.6",
     "nativescript-unit-test-runner": "^0.3.4",
     "tns-core-modules": "^3.0.0"
   },

demo/app/main-page.xml

@@ -215,7 +215,7 @@ function _isGooglePlayServicesAvailable(): boolean {
 
     let isLocationServiceEnabled = true;
     let googleApiAvailability = com.google.android.gms.common.GoogleApiAvailability.getInstance();
-    let resultCode = googleApiAvailability.isGooglePlayServicesAvailable(androidAppInstance.foregroundActivity);
+    let resultCode = googleApiAvailability.isGooglePlayServicesAvailable(androidAppInstance.context);
     if (resultCode !== com.google.android.gms.common.ConnectionResult.SUCCESS) {
         isLocationServiceEnabled = false;
     }