Update platform_services to query battery level instead of location. (#8554)

examples/platform_services/README.md

@@ -6,61 +6,12 @@ You can read more about
 [accessing platform and third-party services in Flutter](https://flutter.io/platform-services/).
 
 ## iOS
-
-### Configure
-
-Create an `ios/Flutter/Generated.xcconfig` file with this entry:
-
- * `FLUTTER_ROOT=[absolute path to the Flutter SDK]`
-
-There are a number of other parameters you can control with this file:
-
- * `FLUTTER_APPLICATION_PATH`: The path to the directory that contains your
-   `pubspec.yaml` file relative to your `xcodeproj` file.
- * `FLUTTER_BUILD_MODE`: Whether to build for `debug`, `profile`, or `release`.
-   Defaults to `release`.
- * `FLUTTER_TARGET`: The path to your `main.dart` relative to your
-   `pubspec.yaml`. Defaults to `lib/main.dart`.
- * `FLUTTER_FRAMEWORK_DIR`: The absolute path to the directory that contains
-   `Flutter.framework`. Defaults to the `ios-release` version of
-   `Flutter.framework` in the `bin/cache` directory of the Flutter SDK.
-
-### Build
-
-Once you've configured your project, you can open `ios/Runner.xcodeproj`
-in Xcode and build the project as usual.
+You can use the commands `flutter build` and `flutter run` from the app's root
+directory to build/run the app or you can open `ios/Runner.xcworkspace` in Xcode
+and build/run the project as usual.
 
 ## Android
 
-### Configure
-
-Create an `android/local.properties` file with these entries:
-
- * `sdk.dir=[path to the Android SDK]`
- * `flutter.sdk=[path to the Flutter SDK]`
-
-There are a number of other parameters you can control with this file:
-
- * `flutter.buildMode`: Whether to build for `debug`, `profile`, or `release`.
-   Defaults to `release`.
- * `flutter.jar`: The path to `flutter.jar`. Defaults to the
-   `android-arm-release` version of `flutter.jar` in the `bin/cache` directory
-   of the Flutter SDK.
-
-See `android/app/build.gradle` for project specific settings, including:
-
- * `source`: The path to the directory that contains your `pubspec.yaml` file
-   relative to your `build.gradle` file.
- * `target`: The path to your `main.dart` relative to your `pubspec.yaml`.
-   Defaults to `lib/main.dart`.
-
-### Build
-
-To build directly with `gradle`, use the following commands:
-
- * `cd android`
- * `gradle wrapper`
- * `./gradlew build`
-
-To build with Android Studio, open the `android` folder in Android Studio and
-build the project as usual.
+You can use the commands `flutter build` and `flutter run` from the app's root
+directory to build/run the app or to build with Android Studio, open the
+`android` folder in Android Studio and build the project as usual.

examples/platform_services/android/app/src/main/java/com/example/flutter/ExampleActivity.java

@@ -4,10 +4,9 @@
 
 package com.example.flutter;
 
-import android.content.Context;
-import android.content.pm.PackageManager;
-import android.location.Location;
-import android.location.LocationManager;
+import android.os.BatteryManager;
+import android.os.Build.VERSION;
+import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 
 import io.flutter.app.FlutterActivity;
@@ -15,49 +14,33 @@ import io.flutter.plugin.common.FlutterMethodChannel;
 import io.flutter.plugin.common.FlutterMethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.FlutterMethodChannel.Response;
 import io.flutter.plugin.common.MethodCall;
-import io.flutter.view.FlutterView;
 
 public class ExampleActivity extends FlutterActivity {
-    private FlutterView flutterView;
+  private static final String CHANNEL = "battery";
 
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        new FlutterMethodChannel(getFlutterView(), "geo").setMethodCallHandler(new MethodCallHandler() {
-            @Override
-            public void onMethodCall(MethodCall call, Response response) {
-                if (call.method.equals("getLocation")) {
-                    if (!(call.arguments instanceof String)) {
-                        throw new IllegalArgumentException("Invalid argument type, String expected");
-                    }
-                    getLocation((String) call.arguments, response);
-                } else {
-                    throw new IllegalArgumentException("Unknown method " + call.method);
-                }
-            }
-        });
-    }
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
 
-    private void getLocation(String provider, Response response) {
-        String locationProvider;
-        if (provider.equals("network")) {
-            locationProvider = LocationManager.NETWORK_PROVIDER;
-        } else if (provider.equals("gps")) {
-            locationProvider = LocationManager.GPS_PROVIDER;
-        } else {
-            throw new IllegalArgumentException("Unknown provider " + provider);
-        }
-        String permission = "android.permission.ACCESS_FINE_LOCATION";
-        if (checkCallingOrSelfPermission(permission) == PackageManager.PERMISSION_GRANTED) {
-            LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
-            Location location = locationManager.getLastKnownLocation(locationProvider);
-            if (location != null) {
-                response.success(new double[] { location.getLatitude(), location.getLongitude() });
+    new FlutterMethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(
+        new MethodCallHandler() {
+          @Override
+          public void onMethodCall(MethodCall call, Response response) {
+            if (call.method.equals("getBatteryLevel")) {
+              getBatteryLevel(response);
             } else {
-                response.error("unknown", "Location unknown", null);
+              throw new IllegalArgumentException("Unknown method " + call.method);
             }
-        } else {
-            response.error("permission", "Access denied", null);
-        }
+          }
+    });
+  }
+
+  private void getBatteryLevel(Response response) {
+    BatteryManager batteryManager = (BatteryManager) getSystemService(BATTERY_SERVICE);
+    if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+      response.success(batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY));
+    } else {
+      response.error("Not available", "Battery level not available.", null);
     }
+  }
 }

examples/platform_services/ios/Runner.xcodeproj/project.pbxproj

@@ -13,7 +13,6 @@
 		9740EEB41CF90195004384FC /* Flutter.xcconfig in Resources */ = {isa = PBXBuildFile; fileRef = 9740EEB21CF90195004384FC /* Flutter.xcconfig */; };
 		9740EEB51CF90195004384FC /* Generated.xcconfig in Resources */ = {isa = PBXBuildFile; fileRef = 9740EEB31CF90195004384FC /* Generated.xcconfig */; };
 		9740EEBB1CF902C7004384FC /* app.flx in Resources */ = {isa = PBXBuildFile; fileRef = 9740EEB71CF902C7004384FC /* app.flx */; };
-		977505191CFDF23500BC28DA /* LocationProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 977505181CFDF23500BC28DA /* LocationProvider.m */; };
 		97A38A351CFDEC880099F1B4 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 97A38A341CFDEC880099F1B4 /* AppDelegate.m */; };
 		97C146F31CF9000F007C117D /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 97C146F21CF9000F007C117D /* main.m */; };
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
@@ -42,8 +41,6 @@
 		9740EEB71CF902C7004384FC /* app.flx */ = {isa = PBXFileReference; lastKnownFileType = file; name = app.flx; path = Flutter/app.flx; sourceTree = "<group>"; };
 		9740EEB81CF902C7004384FC /* app.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = app.dylib; path = Flutter/app.dylib; sourceTree = "<group>"; };
 		9740EEBA1CF902C7004384FC /* Flutter.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Flutter.framework; path = Flutter/Flutter.framework; sourceTree = "<group>"; };
-		977505171CFDF21E00BC28DA /* LocationProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = LocationProvider.h; sourceTree = "<group>"; };
-		977505181CFDF23500BC28DA /* LocationProvider.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = LocationProvider.m; sourceTree = "<group>"; };
 		97A38A331CFDEC680099F1B4 /* AppDelegate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
 		97A38A341CFDEC880099F1B4 /* AppDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AppDelegate.m; sourceTree = "<group>"; };
 		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -105,8 +102,6 @@
 				97C146F11CF9000F007C117D /* Supporting Files */,
 				97A38A331CFDEC680099F1B4 /* AppDelegate.h */,
 				97A38A341CFDEC880099F1B4 /* AppDelegate.m */,
-				977505171CFDF21E00BC28DA /* LocationProvider.h */,
-				977505181CFDF23500BC28DA /* LocationProvider.m */,
 			);
 			path = Runner;
 			sourceTree = "<group>";
@@ -212,7 +207,6 @@
 			files = (
 				97A38A351CFDEC880099F1B4 /* AppDelegate.m in Sources */,
 				97C146F31CF9000F007C117D /* main.m in Sources */,
-				977505191CFDF23500BC28DA /* LocationProvider.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

examples/platform_services/ios/Runner/AppDelegate.m

@@ -5,23 +5,11 @@
 #import "AppDelegate.h"
 
 #import <Flutter/Flutter.h>
-#import "LocationProvider.h"
 
 @implementation AppDelegate {
-    LocationProvider* _locationProvider;
 }
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-    FlutterDartProject* project = [[FlutterDartProject alloc] initFromDefaultSourceForConfiguration];
-    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
-    FlutterViewController* flutterController = [[FlutterViewController alloc] initWithProject:project
-                                                                                      nibName:nil
-                                                                                       bundle:nil];
-    _locationProvider = [[LocationProvider alloc] init];
-    [flutterController addMessageListener:_locationProvider];
-
-    self.window.rootViewController = flutterController;
-    [self.window makeKeyAndVisible];
     return YES;
 }
 

examples/platform_services/ios/Runner/Base.lproj/Main.storyboard

-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16D32" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11757"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
-        <!--View Controller-->
+        <!--Flutter View Controller-->
         <scene sceneID="tne-QT-ifu">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="" sceneMemberID="viewController">
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
                     </layoutGuides>
                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
-                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                     </view>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

examples/platform_services/ios/Runner/LocationProvider.h

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import <Flutter/Flutter.h>
-
-@interface LocationProvider : NSObject <FlutterMessageListener>
-
-@end

examples/platform_services/ios/Runner/LocationProvider.m

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "LocationProvider.h"
-
-#import <CoreLocation/CoreLocation.h>
-
-@implementation LocationProvider {
-    CLLocationManager* _locationManager;
-}
-
-@synthesize messageName = _messageName;
-
-- (instancetype) init {
-    self = [super init];
-    if (self)
-        self->_messageName = @"getLocation";
-    return self;
-}
-
-- (NSString*)didReceiveString:(NSString*)message {
-    if (_locationManager == nil) {
-        _locationManager = [[CLLocationManager alloc] init];
-        [_locationManager startMonitoringSignificantLocationChanges];
-    }
-
-    CLLocation* location = _locationManager.location;
-
-    NSDictionary* response = @{
-        @"latitude": @(location.coordinate.latitude),
-        @"longitude": @(location.coordinate.longitude),
-    };
-
-    NSData* data = [NSJSONSerialization dataWithJSONObject:response options:0 error:nil];
-    return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
-}
-
-@end

examples/platform_services/lib/main.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -13,20 +14,23 @@ class PlatformServices extends StatefulWidget {
 }
 
 class _PlatformServicesState extends State<PlatformServices> {
-  static const PlatformMethodChannel platform = const PlatformMethodChannel('geo');
-  String _location = 'Unknown location.';
-
-  Future<Null> _getLocation() async {
-    String location;
-    try {
-      final List<double> result = await platform.invokeMethod('getLocation', 'network');
-      location = 'Latitude ${result[0]}, Longitude ${result[1]}.';
-    } on PlatformException catch (e) {
-      location = "Failed to get location: '${e.message}'.";
+  static const PlatformMethodChannel platform = const PlatformMethodChannel('battery');
+  String _batteryLevel = 'Unknown battery level.';
+
+  Future<Null> _getBatteryLevel() async {
+    String batteryLevel;
+    if (Platform.isIOS) {
+      batteryLevel = "iOS is not supported yet.";
+    } else {
+      try {
+        final int result = await platform.invokeMethod('getBatteryLevel');
+        batteryLevel = 'Battery level at $result. %';
+      } on PlatformException catch (e) {
+        batteryLevel = "Failed to get battery level: '${e.message}'.";
+      }
     }
-
     setState(() {
-      _location = location;
+      _batteryLevel = batteryLevel;
     });
   }
 
@@ -38,17 +42,17 @@ class _PlatformServicesState extends State<PlatformServices> {
           mainAxisAlignment: MainAxisAlignment.spaceEvenly,
           children: <Widget>[
             new RaisedButton(
-              child: new Text('Get Location'),
-              onPressed: _getLocation,
+              child: new Text('Get Battery Level'),
+              onPressed: _getBatteryLevel,
             ),
-            new Text(_location)
+            new Text(_batteryLevel)
           ],
-        ),
-      ),
+        )
+      )
     );
   }
 }
-
+  
 void main() {
   runApp(new PlatformServices());
 }