PinPdfFiles.java

//Pre-Oreo
private void addShortcut(String path1, String pdfName) {
        File file = new File(path1);
        if (file.exists()) {
            Uri path = Uri.fromFile(file);
            Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
            shortcutIntent.setDataAndType(path, "application/pdf");
            Intent addIntent = new Intent();
            addIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
            addIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, pdfName);
            addIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
                    Intent.ShortcutIconResource.fromContext(this.getApplicationContext(),image));
            addIntent.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
            getApplicationContext().sendBroadcast(addIntent);
        } else {
            Toast.makeText(this, "Some error occurred!", Toast.LENGTH_SHORT).show();
        }
    }

//Oreo and above
    private void addShortcutInOreo(String path1, String pdfName){
        try {
            File file = new File(path1);
            Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
            pdfIntent.setDataAndType(Uri.fromFile(file), "application/pdf");

            if (Build.VERSION.SDK_INT > 25) {
                ShortcutManager shortcutManager;
                shortcutManager = getSystemService(ShortcutManager.class);
                if (blue.isChecked())
                    image = R.drawable.pdf;
                else image = R.drawable.pdf2;
                ShortcutInfo shortcut = new ShortcutInfo.Builder(this, pdfName)
                        .setShortLabel(pdfName)
                        .setLongLabel(pdfName)
                        .setIcon(Icon.createWithResource(this, image))
                        .setIntent(pdfIntent)
                        .build();

                shortcutManager.requestPinShortcut(shortcut, null);
            }
        }catch (Exception e){
            Toast.makeText(this, "Some error occurred: "+e.getMessage(), Toast.LENGTH_SHORT).show();
        }
    }