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449f4a6673
* Update project.pbxproj files to say Flutter rather than Chromium Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright. * Update the copyright notice checker to require a standard notice on all files * Update copyrights on Dart files. (This was a mechanical commit.) * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine. Some were already marked "The Flutter Authors", not clear why. Their dates have been normalized. Some were missing the blank line after the license. Some were randomly different in trivial ways for no apparent reason (e.g. missing the trailing period). * Clean up the copyrights in non-Dart files. (Manual edits.) Also, make sure templates don't have copyrights. * Fix some more ORGANIZATIONNAMEs
85 lines
2.2 KiB
Dart
85 lines
2.2 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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class PlatformChannel extends StatefulWidget {
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@override
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_PlatformChannelState createState() => _PlatformChannelState();
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}
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class _PlatformChannelState extends State<PlatformChannel> {
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static const MethodChannel methodChannel =
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MethodChannel('samples.flutter.io/battery');
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static const EventChannel eventChannel =
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EventChannel('samples.flutter.io/charging');
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String _batteryLevel = 'Battery level: unknown.';
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String _chargingStatus = 'Battery status: unknown.';
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Future<void> _getBatteryLevel() async {
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String batteryLevel;
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try {
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final int result = await methodChannel.invokeMethod('getBatteryLevel');
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batteryLevel = 'Battery level: $result%.';
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} on PlatformException {
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batteryLevel = 'Failed to get battery level.';
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}
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setState(() {
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_batteryLevel = batteryLevel;
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});
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}
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@override
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void initState() {
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super.initState();
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eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError);
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}
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void _onEvent(Object event) {
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setState(() {
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_chargingStatus =
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"Battery status: ${event == 'charging' ? '' : 'dis'}charging.";
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});
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}
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void _onError(Object error) {
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setState(() {
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_chargingStatus = 'Battery status: unknown.';
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});
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}
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@override
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Widget build(BuildContext context) {
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return Material(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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children: <Widget>[
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Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text(_batteryLevel, key: const Key('Battery level label')),
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Padding(
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padding: const EdgeInsets.all(16.0),
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child: RaisedButton(
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child: const Text('Refresh'),
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onPressed: _getBatteryLevel,
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),
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),
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],
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),
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Text(_chargingStatus),
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],
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),
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);
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}
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}
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void main() {
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runApp(MaterialApp(home: PlatformChannel()));
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}
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