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import 'dart:io';
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import 'dart:isolate';
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import 'dart:ui';
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import 'package:common_utils/common_utils.dart';
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import 'package:device_info/device_info.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_picker/Picker.dart';
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import 'package:flutter_screenutil/flutter_screenutil.dart';
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@@ -6,11 +11,15 @@ import 'package:one_key/res/colors.dart'; |
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import 'package:one_key/widgets/round_button.dart';
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import 'package:one_key/widgets/system_app_bar.dart';
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import 'package:one_key/widgets/v_empty_view.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:permission_handler/permission_handler.dart';
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import '../../../../utils/dialog_util.dart';
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import '../../../../utils/screen_util.dart';
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import '../../../../utils/utils.dart';
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import '../../../../widgets/h_empty_view.dart';
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import 'package:flutter_downloader/flutter_downloader.dart';
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import 'package:android_path_provider/android_path_provider.dart';
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/**
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* 导出预订数据
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@@ -31,6 +40,172 @@ class _ExportBookDataPageState extends State<ExportBookDataPage> { |
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List<String> data = ['到店时间', '下单时间'];
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int timeIndex;
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ReceivePort _port = ReceivePort();
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String _localPath;
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String taskId;
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DownloadTaskStatus status;
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int progress;
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@override
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void initState() {
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super.initState();
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_bindBackgroundIsolate();
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FlutterDownloader.registerCallback(downloadCallback, step: 1);
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}
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@override
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void dispose() {
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_unbindBackgroundIsolate();
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super.dispose();
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}
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@pragma('vm:entry-point')
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static void downloadCallback(
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String id,
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int status,
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int progress,
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) {
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print(
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'Callback on background isolate: '
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'task ($id) is in status ($status) and process ($progress)',
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);
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IsolateNameServer.lookupPortByName('downloader_send_port')
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?.send([id, status, progress]);
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}
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// 根据taskId打开下载文件
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Future<bool> _openDownloadedFile(taskId) {
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return FlutterDownloader.open(taskId: taskId);
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}
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void _bindBackgroundIsolate() {
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final isSuccess = IsolateNameServer.registerPortWithName(
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_port.sendPort,
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'downloader_send_port',
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);
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if (!isSuccess) {
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_unbindBackgroundIsolate();
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_bindBackgroundIsolate();
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return;
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}
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_port.listen((dynamic data) {
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taskId = (data as List<dynamic>)[0] as String;
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status = DownloadTaskStatus(data[1] as int);
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progress = data[2] as int;
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print(
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'Callback on UI isolate: '
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'task ($taskId) is in status ($status) and process ($progress)',
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);
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if (status == DownloadTaskStatus.undefined) {
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// _requestDownload(task);
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} else if (status == DownloadTaskStatus.running) {
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// _pauseDownload(task);
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} else if (status == DownloadTaskStatus.paused) {
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// _resumeDownload(task);
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} else if (status == DownloadTaskStatus.complete ||
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status == DownloadTaskStatus.canceled) {
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// _delete(task);
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// 显示是否打开的对话框
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showDialog(
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// 设置点击 dialog 外部不取消 dialog，默认能够取消
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barrierDismissible: false,
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context: context,
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builder: (context) => AlertDialog(
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title: Text('提示'),
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// 标题文字样式
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content: Text('文件下载完成，是否打开？'),
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// 内容文字样式
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backgroundColor: MyColours.color_ffffff,
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elevation: 8.0,
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// 投影的阴影高度
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semanticLabel: 'Label',
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// 这个用于无障碍下弹出 dialog 的提示
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shape: Border.all(),
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// dialog 的操作按钮，actions 的个数尽量控制不要过多，否则会溢出 `Overflow`
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actions: <Widget>[
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// 点击取消按钮
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InkWell(
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onTap: () => Navigator.pop(context), child: Text('取消')),
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// 点击打开按钮
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InkWell(
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onTap: () {
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Navigator.pop(context);
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// 打开文件
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_openDownloadedFile(taskId).then((success) {
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if (!success) {
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Utils.showToast('Cannot open this file');
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// Scaffold.of(context).showSnackBar(SnackBar(
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// content: Text('Cannot open this file')));
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}
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});
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},
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child: Text('打开')),
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],
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));
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} else if (status == DownloadTaskStatus.failed) {
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// _retryDownload(task);
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}
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});
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}
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Future<void> _prepareSaveDir() async {
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_localPath = (await _getSavedDir());
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final savedDir = Directory(_localPath);
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if (!savedDir.existsSync()) {
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await savedDir.create();
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}
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}
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Future<String> _getSavedDir() async {
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String externalStorageDirPath;
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if (Platform.isAndroid) {
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try {
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externalStorageDirPath = await AndroidPathProvider.downloadsPath;
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} catch (err, st) {
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print('failed to get downloads path: $err, $st');
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final directory = await getExternalStorageDirectory();
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externalStorageDirPath = directory?.path;
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}
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} else if (Platform.isIOS) {
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externalStorageDirPath =
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(await getApplicationDocumentsDirectory()).absolute.path;
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}
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return externalStorageDirPath;
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}
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Future<bool> _checkPermission() async {
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if (Platform.isIOS) {
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return true;
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}
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if (Platform.isAndroid) {
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final info = await DeviceInfoPlugin().androidInfo;
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if (info.version.sdkInt > 28) {
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return true;
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}
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final status = await Permission.storage.status;
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if (status == PermissionStatus.granted) {
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return true;
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}
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final result = await Permission.storage.request();
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return result == PermissionStatus.granted;
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}
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throw StateError('unknown platform');
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}
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void _unbindBackgroundIsolate() {
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IsolateNameServer.removePortNameMapping('downloader_send_port');
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}
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///时间选择
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Widget _select(String title, String hintText, GestureTapCallback onTap) {
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...
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...
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@@ -124,7 +299,12 @@ class _ExportBookDataPageState extends State<ExportBookDataPage> { |
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// controller: controller,
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child: Column(
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children: [
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VEmptyView(10),
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(status == DownloadTaskStatus.running ||
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status == DownloadTaskStatus.paused)
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? LinearProgressIndicator(
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value: progress / 100,
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)
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: VEmptyView(10),
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Container(
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padding: EdgeInsets.only(left: w(16)),
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color: MyColours.color_ffffff,
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@@ -234,6 +414,24 @@ class _ExportBookDataPageState extends State<ExportBookDataPage> { |
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radius: r(10),
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fontSize: 32,
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isBold: true,
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onPressed: () async {
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bool _permissionReady = await _checkPermission();
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if (_permissionReady) {
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await _prepareSaveDir();
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}
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taskId = await FlutterDownloader.enqueue(
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url:
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'http://englishonlineclub.com/pdf/iOS%20Programming%20-%20The%20Big%20Nerd%20Ranch%20Guide%20(6th%20Edition)%20[EnglishOnlineClub.com].pdf',
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headers: {
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'auth': 'test_for_sql_encoding'
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}, // optional: header send with url (auth token etc)
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savedDir: _localPath,
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showNotification:
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true, // show download progress in status bar (for Android)
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openFileFromNotification:
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true, // click on notification to open downloaded file (for Android)
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);
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},
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)
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],
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),
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...
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