How do I download a specific file from the FirebaseStorage using its downloadURL?

(e.g. https://firebasestorage.googleapis.com/v0/b/smart-edubox-90c5d.appspot.com/o/uploaded_files/pdf_files/08-11-2022_15:43:02_dummy.pdf?alt=media&token=f68e7403-0cb7-4c86-9799-1c47fffd9cb5 )

I load the image, pdf, and text file into a RecyclerView. When I tap on a CardView (in the RecyclerView) I will be redirected to the file's corresponding download url in a browser. How should I do it so that instead of opening it in a web browser, the file would be downloaded to a specific folder in the user's phone.

Any help is appreciated. Thanks!

CodePudding user response：

To download any file from Url you can simply use the Download Manager of Android this is code to download file from URL

String[] PERMISSIONS = {
            android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
            android.Manifest.permission.READ_EXTERNAL_STORAGE,
    };

if (!hasPermissions(activity.this, PERMISSIONS)) {
            String url = "https://firebasestorage.googleapis.com/v0/b/smart-edubox-90c5d.appspot.com/o/uploaded_files/pdf_files/08-11-2022_15:43:02_dummy.pdf?alt=media&token=f68e7403-0cb7-4c86-9799-1c47fffd9cb5";
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setDescription("Some descrition");
            request.setTitle("Some title");
            // in order for this if to run, you must use the android 3.2 to compile your app
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "name-of-the-file.pdf");

            // get download service and enqueue file
            DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
            manager.enqueue(request);
        }

this is permission for Storage

public static boolean hasPermissions(Context context, String... permissions) {
        if (context != null && permissions != null) {
            for (String permission : permissions) {
                if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
                    return false;
                }
            }
        }
        return true;
    }

and your manifest permissions will be

<uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />