Not able to Open PDF file by using Adobe in Nougat

Question

I have research a lot but still I am not getting proper solution to open downloaded pdf in Adobe reader. By using below code pdf gets opened using google doc app but not by adobe.

To download pdf from Url

 URL url = new URL(f_url[0]);
        try {
                    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                    urlConnection.connect();
                    InputStream inputStream = urlConnection.getInputStream();
                    FileOutputStream fileOutputStream = new FileOutputStream(Environment.getExternalStorageDirectory() + "/" + getFileName());

                    byte[] buffer = new byte[AccessibilityNodeInfoCompat.ACTION_DISMISS];
                    while (true) {
                        int bufferLength = inputStream.read(buffer);
                        if (bufferLength <= 0) {
                            break;
                        }
                        fileOutputStream.write(buffer, 0, bufferLength);
                    }
                    fileOutputStream.close();
                } catch (Exception e) {
                    FileLog.e("PDF Save", e);
                }

To view saved PDF

    File file = new File(Environment.getExternalStorageDirectory() + "/" + getFileName());
    try {
           if (file.exists()) {
               Uri fileUri = Uri.fromFile(file);
            if (Utilities.isAboveNougat()) {
            Uri contentUri = FileProvider.getUriForFile(mContext, "myPackage.fileprovider", file);
             Intent intent = new Intent();
             intent.setAction(Intent.ACTION_VIEW);
             intent.setDataAndType(contentUri, "application/pdf");         
             intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
             intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_ACTIVITY_CLEAR_TOP);
            mContext.startActivity(intent);

         } else {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_VIEW);
            intent.setDataAndType(fileUri, "application/pdf");
             mContext.startActivity(intent);
         }

    } else {
     Toast.makeText(mContext, "Not able to find downloaded file", Toast.LENGTH_LONG).show();
     }

    } catch (ActivityNotFoundException ae) {
       Toast.makeText(mContext, "No activity found to open this attachment.", Toast.LENGTH_LONG).show();
    }
public static boolean isAboveNougat() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        return true;
    }
    return false;
}

Manifest.xml;

<provider
            android:name="android.support.v4.content.FileProvider"     
       android:authorities="myPackage.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths" />
        </provider>

provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path path="." name="external_storage_root" />
</paths>

I also tried following way to open pdf;

Intent intent = ShareCompat.IntentBuilder.from((Activity) mContext)
                                .setStream(contentUri)
                                .setType("application/pdf")
                                .getIntent()
                                .setAction(Intent.ACTION_VIEW)
                                .setDataAndType(contentUri, "application/pdf")                                .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_ACTIVITY_CLEAR_TOP);
mContext.startActivity(intent);

But still not able to solve issue. While opening pdf using adobe its showing toast message;

File could not be access please check location or network connection.

Answer 1

Finally I came to know where I made mistake. While downloading pdf from Url its gets store in bytes & adobe not able to read that byte formatted file. So while saving that downloaded file we need to give .pdf extension, which I didn't gave while storing it. Most of the document viewing apps able to read byte formatted file like google's docs app.

I made changes in getFileName function;

private String getFileName() {
        String tempFileName = urlString.substring(urlString.length() - 10);
        String[] arrFilenames = tempFileName.split("\\.");
        return Utilities.getString(arrFilenames[0]+".pdf");            
    }

Answer 2

Uri contentUri = FileProvider.getUriForFile(mContext, "myPackage.fileprovider", file);
         Intent intent = new Intent();
         intent.setAction(Intent.ACTION_VIEW);
         intent.setDataAndType(contentUri, "application/pdf");         
         intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
         intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_ACTIVITY_CLEAR_TOP);
        mContext.startActivity(intent);

for nougat this works for me