[battery] Fix pedantic linter errors

packages/battery/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.1+5
+
+* Fix pedantic linter errors.
+
 ## 0.3.1+4
 
 * Update and migrate iOS example project.

packages/battery/example/lib/main.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// ignore_for_file: public_member_api_docs
+
 import 'dart:async';
 
 import 'package:flutter/material.dart';
@@ -63,6 +65,7 @@ class _MyHomePageState extends State<MyHomePage> {
         child: const Icon(Icons.battery_unknown),
         onPressed: () async {
           final int batteryLevel = await _battery.batteryLevel;
+          // ignore: unawaited_futures
           showDialog<void>(
             context: context,
             builder: (_) => AlertDialog(

packages/battery/lib/battery.dart

@@ -8,9 +8,21 @@ import 'package:flutter/services.dart';
 import 'package:meta/meta.dart' show visibleForTesting;
 
 /// Indicates the current battery state.
-enum BatteryState { full, charging, discharging }
+enum BatteryState {
+  /// The battery is completely full of energy.
+  full,
 
+  /// The battery is currently storing energy.
+  charging,
+
+  /// The battery is currently losing energy.
+  discharging
+}
+
+/// API for accessing information about the battery of the device the Flutter
+/// app is currently running on.
 class Battery {
+  /// Initializes the plugin and starts listening for potential platform events.
   factory Battery() {
     if (_instance == null) {
       final MethodChannel methodChannel =
@@ -22,6 +34,8 @@ class Battery {
     return _instance;
   }
 
+  /// This constructor is only used for testing and shouldn't be accessed by
+  /// users of the plugin. It may break or change at any time.
   @visibleForTesting
   Battery.private(this._methodChannel, this._eventChannel);
 

packages/battery/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for accessing information about the battery state
   (full, charging, discharging) on Android and iOS.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/battery
-version: 0.3.1+4
+version: 0.3.1+5
 
 flutter:
   plugin: