1-) FLUTTER - Dio ile pdf indirme ve OpenFile ile görüntüleme download

**** BİRİNCİ YOL FlutterDownloader ile ***

terminale yaz -> flutter pub add flutter_downloader

İNİTİALİZİNG

 void callback(String id ,DownloadTaskStatus status,int progress){}

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await FlutterDownloader.initialize(debug: true, ignoreSsl: true); // , ignoreSsl: true
  FlutterDownloader.registerCallback(callback);

  runApp(const MyApp());}

PATH İÇİN

Future<String?> getDownloadPath() async {

    Directory? directory;

    try {

      if (Platform.isIOS) {

        directory = await getApplicationDocumentsDirectory();

    } else {

        directory = Directory('/storage/emulated/0/Download');

        // Put file in global download folder, if for an unknown reason it didn't exist, we fallback

        // ignore: avoid_slow_async_io

        if (!await directory.exists()) directory = await getExternalStorageDirectory();

}

    } catch (err, stack) {

    print("Cannot get download folder path");

}

return directory?.path;

}

DOSYA İNDİRME

// String? dosyaYolu = await getDownloadPath();

String urlim = "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf";

 await FlutterDownloader.enqueue(
               url:urlim ,
        showNotification: true,
        openFileFromNotification: true,

        saveInPublicStorage: true,

        savedDir: (await getExternalStorageDirectory())!.path);

**** İKİNCİ YOL CHROME YÖNLENDİRİR ***

String urlim = "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf";

final String _url_files = "$urlim";
void _launchURL_files() async =>
    await canLaunch(_url_files) ? await launch(_url_files) : throw 'Could not launch $_url_files';
_launchURL_files();

1. MobileDownloadService.dart

2. KULLANIMI

kaynak : https://github.com/MCarlomagno/flutter_download_button

4. InAppWebView ile

onDownloadStart: (controller,url,) async {  
    await FlutterDownloader.enqueue(
               url: url.toString(),
        showNotification: true,
        openFileFromNotification: true,
        savedDir: "/storage/emulated/0/Download"   );},

5. AndroidManifest.xml

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

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

 <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="com.pichillilorenzo.flutter_inappwebview.InAppWebViewFileProvider"
    android:authorities="${applicationId}.flutter_inappwebview.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths" />
</provider>

</application>

6. Android->app->src->main->res->xml->provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path
        name="external_files"
        path="." />
    <external-files-path
        name="external_files"
        path="." />
    <cache-path
        name="cache"
        path="." />
    <external-cache-path
        name="external_cache"
        path="." />
    <files-path
        name="files"
        path="." />


</paths>

SON NOT ANDROİD İÇİN BUNU KULLAN savedDir: (await getExternalStorageDirectory())!.path);

İOS İÇİN BUNU KULLAN directory = await getApplicationDocumentsDirectory();