Problems in Sudoku

Hello, I am learning Hello android ,there are several problems confuse me .
I am a new learner about android and I have just a little foundation in JAVA (I have learned Chapter 1-4 in and Stanford open course,made approximately 20 toy applet). While I am learning the book I feel that I’m just copying the code from the book to the eclipse and don’t understand much of them. Should I read more books about JAVA before I learn android?
Now I am stuck in the Sudoku.

This is the manifest,

<?xml version=”1.0” encoding=”utf-8”?>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android” package=”org.example.sudoku” android:versionCode=”1” android:versionName=”1.0” >

<application
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" >
    <activity
        android:name=".Sudoku" 
        android:label="@string/app_name" >
        
            

<activity android:name=”.About” android:label=”@string/about_title” android:theme=”@android:style/Theme.Dialog”> <activity android:name=”.Prefs” android:label=”@string/settings_title”>

Eclipse says Multiple annotations found at this line: – The value of attribute “android:label” associated with an element type “activity” must not contain the ‘<’ character. – error: Error parsing XML: not well-formed (invalid token)
I don’t know how to fix it.

Somehow the error has been fixed…But I am still confused with the how to learn android.
Please help me and give me some advice,Thank you so much.

I do recommend some introduction to Java if you’ve never used it before. See:

• http://forums.pragprog.com/forums/138/topics/3679

The error about the ‘<’ character was most likely caused by a missing or malformed quote character. Sometimes doing a format command (Ctrl+Shift+F) will make the error more obvious.

Also from what you have posted here.. looks like activity for Preferences was enclosed with in About. As Ed mentioned above if you formatted using (Ctrl+Shift+F), you should see

<activity android:name=".About" android:label="@string/about_title" android:theme="@android:style/Theme.Dialog" > </activity> <activity android:name=".Prefs" android:label="@string/settings_title" android:theme="@android:style/Theme.Black"> </activity>

I think earlier that you saw for multiple annotation might be because of mismatch of closing activity tag.