Downloading and saving a file

Question

I have an problem . I try download a pdf file and save this file in my application folder. But when I try do this I have a error and file is not save...

This is my provider

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path
        name="external_files"
        path="Android/data/xxx/files/Download" />
</paths>

I put this in manifest

    <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="xxx.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths2" />
    </provider>

I do this :

    public static void parseBase64ToPDFAndNoOpen(String base64, String cardId ,Context context) throws IOException {

        FileOutputStream os;
        String path;
        Uri photoURI = null;
        try {
            photoURI = FileProvider.getUriForFile(context.getApplicationContext(),
                    BuildConfig.APPLICATION_ID + ".provider", createImageFile(context,cardId));
        } catch (IOException e) {
            e.printStackTrace();
        }
        File dwldsPath = new File(photoURI.toString());
//            File dwldsPath = new File(Environment.getExternalStorageDirectory() + "/" + File.separator + cardId + ".pdf");
        if (!dwldsPath.exists()) {
            dwldsPath.createNewFile();
            byte[] pdfAsBytes = Base64.decode(base64, 0);
            os = new FileOutputStream(dwldsPath, false);
            os.write(pdfAsBytes);
            os.flush();
            os.close();
        }
    }

private static File createImageFile(Context context,String name) throws IOException {
   File imagesDir = new File(getDefaultTempFilesPath(context));
    return File.createTempFile(
            name, /* prefix */
            ".pdf", /* suffix */
            imagesDir /* directory */
    );
}




   private static String getDefaultTempFilesPath(Context context) {
        if (context != null) {
            File f = context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS);
            if (f != null)
                return f.getPath();
            else {
                f = context.getFilesDir();
                if (f != null)
                    return f.getPath();
            }
        }
        return null;
    }

And I have : java.io.IOException: No such file or directory

Answer 1

Make sure you have added write external storage permission in your menifest.

or please reffer to how to save a downloaded file into internal storage in android?

Hope the link will help.

Answer 2

Try changing those two methods like that:

private static File createImageFile(Context context, String name) {
    return new File(getDefaultTempFilesPath(context), name + ".pdf");
}

private static File getDefaultTempFilesPath(Context context) {
    File f = null;
    if (context != null) {
        f = context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS);
        if (f == null)
            f = context.getFilesDir();
    }
    return f;
}

Also you might need to change

path="Android/data/xxx/files/Download"

to

path="."

Answer 3

in xml/path.xml file:

<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path
    name="external_files"
    path="." />
</paths>

add permission to AndroidManifest.xml:

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

add to application tag in AndroidManifest.xml:

        <provider
        android:name=".Modules.ContentProviders"
        android:authorities="${applicationId}.provider"
        android:exported="true"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/path" />
    </provider>

MainActivity:

DownloadFileFromURL sdsa = new DownloadFileFromURL();
sdsa.execute(downloadurl);

DownloadFileFromURL :

  class DownloadFileFromURL extends AsyncTask<String, String, String> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        showDialog(progress_bar_type);

    }

    @Override
    protected String doInBackground(String... f_url) {
        int count;
        try {

            URL as = new URL(f_url[0]);
            URLConnection conection = as.openConnection();
            conection.connect();
            int lenghtOfFile = conection.getContentLength();
            InputStream input = new BufferedInputStream(as.openStream(), 8192);
            String diskurl = as.toString().replace(Constants.Download_url, "");
            String diskurlSpace = diskurl.replaceAll("%20", " ");
            OutputStream output = new 
            FileOutputStream(Environment.getExternalStorageDirectory() + 
             "/DocManager" + diskurlSpace);
            byte data[] = new byte[1024];
            long total = 0;
            while ((count = input.read(data)) != -1) {
                total += count;
                publishProgress("" + (int) ((total * 100) / lenghtOfFile));
                output.write(data, 0, count);
            }
            output.flush();
            output.close();
            input.close();
        } catch (Exception e) {
            Log.e("Error: ", e.getMessage());
        }
        return null;
    }

    protected void onProgressUpdate(String... progress) {
        pDialog.setProgress(Integer.parseInt(progress[0]));
    }

    @Override
    protected void onPostExecute(String file_url) {
        dismissDialog(progress_bar_type);
        Snackbar.make(rayMain, "download and saved", 
     Snackbar.LENGTH_LONG).show();
    }

   }