Flutetr flutter_downloader 1.3.1

flutter_downloader 此库更新极慢，所以问题及多，可以看文档

安装

dependencies:

  flutter_downloader: ^1.3.1

配置

Java:

// MyApplication.java

package com.example.flutter_demo;  // 设置你的

import io.flutter.app.FlutterApplication;

import io.flutter.plugin.common.PluginRegistry;

import io.flutter.plugins.GeneratedPluginRegistrant;

public class MyApplication extends FlutterApplication implements PluginRegistry.PluginRegistrantCallback {

    @Override

    public void registerWith(PluginRegistry registry) {

        GeneratedPluginRegistrant.registerWith(registry);

    }

}

Or Kotlin:

// MyApplication.kt

package com.example.flutter_demo // 设置你的

import io.flutter.app.FlutterApplication

import io.flutter.plugin.common.PluginRegistry;

import io.flutter.plugins.GeneratedPluginRegistrant

internal class MyApplication : FlutterApplication(), PluginRegistry.PluginRegistrantCallback {

    override fun registerWith(registry: PluginRegistry) {

        GeneratedPluginRegistrant.registerWith(registry)

    }

}

更新`AndroidManifest.xml`

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.flutter_demo">

    <!-- new -->

    <uses-permission android:name="android.permission.INTERNET"/>

    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

    <!-- new -->

    <!-- io.flutter.app.FlutterApplication is an android.app.Application that

         calls FlutterMain.startInitialization(this); in its onCreate method.

         In most cases you can leave this as-is, but you if you want to provide

         additional functionality it is fine to subclass or reimplement

         FlutterApplication and put your custom class here. -->

         <!-- 更新  android:name -->

    <application

        android:name=".MyApplication"

        android:label="flutter_demo"

        android:icon="@mipmap/ic_launcher">

        <activity

            android:name=".MainActivity"

            android:launchMode="singleTop"

            android:theme="@style/LaunchTheme"

            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

            android:hardwareAccelerated="true"

            android:windowSoftInputMode="adjustResize">

            <!-- This keeps the window background of the activity showing

                 until Flutter renders its first frame. It can be removed if

                 there is no splash screen (such as the default splash screen

                 defined in @style/LaunchTheme). -->

            <meta-data

                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"

                android:value="true" />

            <intent-filter>

                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>

            </intent-filter>

        </activity>

        <!--   flutter_downloader     new-->

        <provider

            android:name="vn.hunghd.flutterdownloader.DownloadedFileProvider"

            android:authorities="${applicationId}.flutter_downloader.provider"

            android:exported="false"

            android:grantUriPermissions="true">

            <meta-data

                android:name="android.support.FILE_PROVIDER_PATHS"

                android:resource="@xml/provider_paths"/>

        </provider>

        <provider

            android:name="androidx.work.impl.WorkManagerInitializer"

            android:authorities="${applicationId}.workmanager-init"

            android:enabled="false"

            android:exported="false" />

        <provider

            android:name="vn.hunghd.flutterdownloader.FlutterDownloaderInitializer"

            android:authorities="${applicationId}.flutter-downloader-init"

            android:exported="false">

            <!-- changes this number to configure the maximum number of concurrent tasks -->

            <meta-data

                android:name="vn.hunghd.flutterdownloader.MAX_CONCURRENT_TASKS"

                android:value="5" />

        </provider>

        <!--        new -->

    </application>

</manifest>

andriod 上简单的使用

// main.dart

import 'dart:io';

import 'dart:isolate';

import 'dart:ui';

import 'package:flutter/material.dart';

import 'package:flutter_downloader/flutter_downloader.dart';

import 'package:path_provider/path_provider.dart';

import 'package:permission_handler/permission_handler.dart';

void main() async {

  runApp(MyApp());

}

class MyApp extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return MaterialApp(

      home: HomePage(),

    );

  }

}

class HomePage extends StatefulWidget {

  @override

  _HomePageState createState() => _HomePageState();

}

class _HomePageState extends State<HomePage> {

  String downloadId;

  String _link = "https://i.loli.net/2019/10/18/gE3PTycd9SF5VqY.jpg";

  String _localPath;

  ReceivePort _port = ReceivePort();

  @override

  void initState() {

    super.initState();

    _init();

  }

  Future<void> _init() async {

    await FlutterDownloader.initialize();

    IsolateNameServer.registerPortWithName(

        _port.sendPort, 'downloader_send_port');

    _port.listen((dynamic data) {

      print('UI Isolate Callback: $data');

      String id = data[0];

      DownloadTaskStatus status = data[1];

      int progress = data[2];

      print("status: $status");

      print("progress: $progress");

      print("id == downloadId: ${id == downloadId}");

    });

    FlutterDownloader.registerCallback(downloadCallback);

    _localPath = (await _findLocalPath()) + '/Download';

    final savedDir = Directory(_localPath);

    bool hasExisted = await savedDir.exists();

    if (!hasExisted) {

      savedDir.create();

    }

  }

  static void downloadCallback(

      String id, DownloadTaskStatus status, int progress) {

    print(

        'Background Isolate Callback: task ($id) is in status ($status) and process ($progress)');

    final SendPort send =

        IsolateNameServer.lookupPortByName('downloader_send_port');

    send.send([id, status, progress]);

  }

  Future<String> _findLocalPath() async {

    final directory = await getExternalStorageDirectory();

    return directory.path;

  }

  Future<bool> _checkPermission() async {

    if (Theme.of(context).platform == TargetPlatform.android) {

      PermissionStatus permission = await PermissionHandler()

          .checkPermissionStatus(PermissionGroup.storage);

      if (permission != PermissionStatus.granted) {

        Map<PermissionGroup, PermissionStatus> permissions =

            await PermissionHandler()

                .requestPermissions([PermissionGroup.storage]);

        if (permissions[PermissionGroup.storage] == PermissionStatus.granted) {

          return true;

        }

      } else {

        return true;

      }

    } else {

      return true;

    }

    return false;

  }

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      appBar: AppBar(

        title: Text('Home Page'),

      ),

      body: Center(

        child: Text('home page'),

      ),

      floatingActionButton: FloatingActionButton(

        child: Icon(Icons.arrow_downward),

        onPressed: () async {

          if (await _checkPermission()) {

            final taskId = await FlutterDownloader.enqueue(

              url: _link,

              savedDir: _localPath,

              showNotification:

                  true, // show download progress in status bar (for Android)

              openFileFromNotification:

                  true, // click on notification to open downloaded file (for Android)

            );

            downloadId = taskId;

          }

        },

      ),

    );

  }

}

中文模板`res/values-b+zh+ZH/strings.xml`



<resources>

<string name="flutter_downloader_notification_started">下载开始</string>

<string name="flutter_downloader_notification_in_progress">正在下载</string>

<string name="flutter_downloader_notification_canceled">下载取消</string>

<string name="flutter_downloader_notification_failed">下载错误</string>

<string name="flutter_downloader_notification_complete">下载完成</string>

<string name="flutter_downloader_notification_paused">下载暂停</string>

</resources>

巴特西

Flutetr flutter_downloader 1.3.1

安装

配置

更新`AndroidManifest.xml`

andriod 上简单的使用

中文模板`res/values-b+zh+ZH/strings.xml`

最新文章

热门文章

巴特西

Flutetr flutter_downloader 1.3.1

安装

配置

更新AndroidManifest.xml

andriod 上简单的使用

中文模板res/values-b+zh+ZH/strings.xml

最新文章

热门文章

更新`AndroidManifest.xml`

中文模板`res/values-b+zh+ZH/strings.xml`