Android: open pdf using external app

Android: open pdf using external app

 public static void openPDFFiile(Context context,File file){
        //OPEN THE PDF
        String mimeTypeStr = "application/pdf";
        Intent intent2 = new Intent(Intent.ACTION_VIEW);
        //intent2.setDataAndType(uri, mimeTypeStr);

        //Uri apkURI = FileProvider.getUriForFile(
        //        context,
        //        context.getApplicationContext()
        //                .getPackageName() + ".provider", file);
        //BuildConfig.APPLICATION_ID
        Uri apkURI = FileProvider.getUriForFile(
                context,
                context.getApplicationContext()
                        .getPackageName() + ".util.GenericFileProvider", file);


        //Uri photoURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".my.package.name.provider", file);
        intent2.setDataAndType(apkURI, mimeTypeStr);
        intent2.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
        intent2.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        Intent intent1 = Intent.createChooser(intent2, "Open With");
        try {
            context.startActivity(intent1);
        } catch (ActivityNotFoundException e) {
            e.printStackTrace();
            Toast.makeText(context, "Please install pdf viewer app.", Toast.LENGTH_SHORT).show();
            // Instruct the user to install a PDF reader here, or something
        }catch (Exception e){
            e.printStackTrace();
        }

    }