Can't Open PDF file in the storage android 10

I have a pdf file in the Download Storage and I try show it using intent, I already have three PDF viewer apps, but none of them sucessfully show the file, but if I open the pdf directly via file explorer its show just fine.

here is my code :

File kuda = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
File file1 = new File(kuda,"KK.pdf");

Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri= FileProvider.getUriForFile(getContext(), BuildConfig.APPLICATION_ID+".provider",file1);
            
intent.setDataAndType(uri, "application/pdf");                
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);

my manifest :

 <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="${applicationId}.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>
  </provider>

provider paths :

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

I'm using android 10

please help. thanks

Yea, things changed after OS 10, you have to write logic in new way. Sample where we get some response using retrofit and using those byte[], working in my apps. Put this code in your android component(activity for example). Invoking viewModel.getPdfBytes() is response from backend!

private static final int CREATE_FILE = 23;
private void saveFileToStorageIntent() {
Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType(MimeTypeMap.getSingleton().getMimeTypeFromExtension("pdf"));
intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.text_export_pdf_file_first) + getDateString() + getString(R.string.text_export_pdf_file));
startActivityForResult(intent, CREATE_FILE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CREATE_FILE) {
if (resultCode == Activity.RESULT_OK && data != null) {
writePDFToFile(data.getData(), viewModel.getPdfBytes());
}
}
}
private void writePDFToFile(Uri uri, ResponseBody body){
InputStream inputStream = null;
OutputStream outputStream = null;
try {
byte[] fileReader = new byte[4096];
long fileSize = body.contentLength();
long fileSizeDownloaded = 0;
inputStream = body.byteStream();
outputStream = getContentResolver().openOutputStream(uri);
while (true) {
int read = inputStream.read(fileReader);
if (read == -1) {
break;
}
outputStream.write(fileReader, 0, read);
fileSizeDownloaded += read;
Logger.print(TAG, "file download: " + fileSizeDownloaded + " of " + fileSize);
}
outputStream.flush();
openFileWithIntent(uri,"pdf", getString(R.string.open_file));
} catch (Exception e) {
Logger.print(TAG, e.getMessage());
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private void openFileWithIntent(Uri fileUri, String typeString, String openTitle) {
Intent target = new Intent(Intent.ACTION_VIEW);
target.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
target.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
target.setDataAndType(
fileUri,
MimeTypeMap.getSingleton().getMimeTypeFromExtension(typeString)
); // For now there is only type 1 (PDF).
Intent intent = Intent.createChooser(target, openTitle);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
try {
startActivity(intent);
} catch (ActivityNotFoundException e) {
if (BuildConfig.DEBUG) e.printStackTrace();
Toast.makeText(context, getString(R.string.error_no_pdf_app), Toast.LENGTH_SHORT).show();
FirebaseCrashlytics.getInstance().log(getString(R.string.error_no_pdf_app));
FirebaseCrashlytics.getInstance().recordException(e);
}
}