You can use xpath method, like this:
element = xpath("//android.widget.TextView[contains(@resource-id,'text_view_bla')]")
Or
element = xpath("//android.widget.TextView[starts-with(@resource-id,''package:id/text_view_bla)]")
Or
element = find_elements(:xpath, "//android.widget.TextView[starts-with(@resource-id,''package:id/text_view_bla)]")