[Android] eclipse warning: No grammar constraints (DTD or XML Schema) detected for the document

Warning: It's okay. Generally, at the top of the configuration file in the IDE environment is a DTD or xml header. For example
<? XML version = "1.0" encoding = "UTF-8"?>
<! Doctype hibernate-configuration public
"-// Hibernate/hibernate configuration DTD 3.0 // en"
Http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd>

 

DTD verification is an XML specification. To remove Warnings:

Eclipse toolbar: Windows> preferences> XML files> Validation> indicate when no grammar is specified: Select ignore.