Error: No grammar constraints (DTD or XML schema) detected for the document

Question

I have a problem with this xml file as said in the title. I dont know how to solve the problem as i have already searched a lot and only found answers like use clean or change validation of this type to ignore none of the above worked as i want to clear this problem so that my R will be generet in the gen folder.

Hope someone can see the problem soon as this is my examprojekt im working on and cant get further without solving this error :)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Dekrypter" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world" />

</RelativeLayout>

now i have It did solve that problem but now the same error is at the new text i just implemented this — Jacob Holm Mortensen, Feb 28 '13 at 17:25
there is a difference between errors and warnings (red and yellow). If you are using eclipse try to clean and rebuild your project. — gian1200, Feb 28 '13 at 18:02
I found another problem which wasnt listet in the error messages which when solved fixed everything :P and thx — Jacob Holm Mortensen, Feb 28 '13 at 19:43
possible duplicate of [No grammar constraints (DTD or XML schema) detected for the document](http://stackoverflow.com/questions/4551783/no-grammar-constraints-dtd-or-xml-schema-detected-for-the-document) — avalancha, Oct 27 '14 at 12:24

score 4 · Answer 1 · answered Aug 03 '13 at 12:03

4

Start your XML with:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE RelativeLayout>

answered Aug 03 '13 at 12:03

Italo Borssatto

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score 2 · Answer 2 · answered Apr 09 '14 at 21:02

2

The solution is to put on the top of xml this code. It identify the type of the document to encode!

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

Revalidate the project!

CIAO!!!

answered Apr 09 '14 at 21:02

TecnoHelp83

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score 1 · Answer 3 · answered Oct 11 '13 at 09:02

1

I retrieve a solution from a bug issue :

Click Window > Preferences > XML > XML Files > Validation
Change the setting 'validating files'>'No grammar specified' from warning to ignore.
Re-validate your project. No more warnings now.

It works for me.

answered Oct 11 '13 at 09:02

AntoineP

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If you set the DOCTYPE the validation will be ok. No need to disable validations. – Italo Borssatto Nov 01 '13 at 02:37
Exactly what I was looking for. I don't want to add DOCTYPE everywhere just because eclipse feels I should. – Florian F Mar 21 '17 at 10:37

score 0 · Answer 4 · answered Feb 28 '13 at 17:15

0

Add

<?xml version="1.0" encoding="utf-8"?>

To the top of your XML file. This tells the parser that your file is indeed an XML, that it should use XML version 1.0, and that you are using utf-8 encoding.

Without it, the parser doesn't know how it should parse your XML.

answered Feb 28 '13 at 17:15

Bryan Herbst

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thx for the explenation but as i wrote to the other comment it just made another problem :( you know a reason for that problem? – Jacob Holm Mortensen Feb 28 '13 at 17:27

score 0 · Answer 5 · answered Nov 27 '16 at 09:53

First put this :
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE xml>
and after that do this structure:
Click Window > Preferences > XML > XML Files > Validation
Change the setting 'validating files'>'No grammar specified' from warning to ignore.
Re-validate your project. No more warnings now.
thank you AntoineP and TecnoHelp83
https://stackoverflow.com/a/19314230/3117196
https://stackoverflow.com/a/22973854/3117196
worked as well

Error: No grammar constraints (DTD or XML schema) detected for the document

5 Answers5