barteksc:android-pdf-viewer:3.0.0-beta.5 - How to pdfview.fromFile(). FileNotFoundException

I have tried a lot and tried all the soltution posted on Stackoverflow and other forums but with no luck. Every possible way gave me FieNotFoundException with either Bad Path or Wrong Path.

File pdfFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/download/my-pdf-file.pdf");
    pdfView.fromFile(pdfFile).load();

This is how I am trying to open the file from Download folder.
Note:

1. I am able to load the file from Assets folder successfully.

2. I am using Pixel 2 API R as Android Emulator.

3. I have set permissions as

   uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
   uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"

This may help in asnwering.

2020-09-08 07:48:01.503 14928-14928/com.example.roohanikhazainp01 E/PDFView: load pdf error
java.io.FileNotFoundException: open failed: ENOENT (No such file or directory)
    at android.os.ParcelFileDescriptor.openInternal(ParcelFileDescriptor.java:344)
    at android.os.ParcelFileDescriptor.open(ParcelFileDescriptor.java:231)
    at com.github.barteksc.pdfviewer.source.FileSource.createDocument(FileSource.java:37)
    at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:49)
    at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:25)
    at android.os.AsyncTask$3.call(AsyncTask.java:394)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    at java.lang.Thread.run(Thread.java:923)

I think there is something I am missing. Please help thanks

As I was using API 29, 30 it is not possible anymore to access the external storage using

acceEnvironment.getExternalStorageDirectory()

so I have to give user an option to open the PDF from external drive using this.

Intent intentOpenPdf = new Intent((Intent.ACTION_OPEN_DOCUMENT));
intentOpenPdf.addCategory(Intent.CATEGORY_OPENABLE);
intentOpenPdf.setType("application/pdf");
intentOpenPdf.putExtra(DocumentsContract.EXTRA_INITIAL_URI, myBookPath);
startActivityForResult(intentOpenPdf, 786);

And then in the function onActivityResult(). get the Uri to the selected pdf file like this.

protected void onActivityResult(int requestCode, int resultCode, Intent data){
    if (requestCode == 786 && data != null) {
        myPdfUri = data.getData();
        pdfView.fromUri(myPdfUri).load();
    }
}

Note: You can also save this Uri so that the use have not to select the PDF every time.

I used this approach.

protected void onActivityResult(int requestCode, int resultCode, Intent data){
    if (requestCode == 786 && data != null) {
       //Get the uri from data sent by Intent
        myPdfUri = data.getData();

       //Save the received uri for later use
       SharedPreferences sp = this.getPreferences(MODE_PRIVATE);
       SharedPreferences.Editor editor = sp.edit();
       editor.commit();
       getContentResolver().takePersistableUriPermission(myPdfUri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
        // Load the PDF using FromUri
        pdfView.fromUri(myPdfUri).load();
    }
}

Then at the beginning you can check if the uri is saved like this.

List<UriPermission> permissions = getContentResolver().getPersistedUriPermissions();
       if(permissions.isEmpty())
        {
            openPDF(myBookPath);
        }else{
            try {
                SharedPreferences sp2 = getPreferences(MODE_PRIVATE);
                String myPdfUriString = sp2.getString("myPdfUri",""); // default is return if "myPdfUri" does not exist
                myPdfUri = Uri.parse(myPdfUriString);
                loadPdfView(null, myPdfUri, "");
            }catch (RuntimeException ex){
                Helper.Toaster(this, "Error : " + ex.getMessage());
            }
        }

This is working for me. Thanks