Select PDF file from my gallery

Good afternoon I'm trying to select a pdf file from my gallery but it returns me the following message: "Unable to locate application to perform this action")

Android Version 4.1.2

I'm using the following code:

private void showFileChooser() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("application/pdf");
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select txt file"),
                0);
    } catch (android.content.ActivityNotFoundException ex) {
        // Potentially direct the user to the Market with a Dialog

    }
}