Thread: whats wrong with this xml

hi am trying to learn android programming. im following a tube tut to get started i know java but xml is new to me and am having problems with it the code below shows no errors in activity_main.xml but the file shows an error in the ADT directory tree and this is preventing me from importing (R.layout.activity_main) to the java class can anyone spot the error cos i cant seem to find it thanks

<?xml version="1.0" encoding="utf-8"?>
 
<LinearLayout 
    	xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent" 
        android:orientation="vertical" >
 
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Your Total is 0" 
        android:textSize="45dp"
        android:layout_gravity="center"
        android:gravity="center" 
        android:id="@+id/tvDisplay]"    />   
    <Button
        android:layout_height="wrap_content"
        android:layout_width="250dp" 
        android:text="++"
        android:textSize="20dp"
        android:layout_gravity="center"
        android:gravity="center"
        android:id="@+id/badd"   />
    <Button 
        android:layout_height="wrap_content"
        android:layout_width="250dp" 
        android:text="--" 
        android:textSize="20dp"
        android:layout_gravity="center"
        android:gravity="center"
        android:id="@+id/bsub"  />
 
</LinearLayout>

--- Update ---

k this worked for me in case others have similare problem
Right-click your project folder Android Tools -> Fix Project Properties.

k this worked for me in case others have same problem

Right-click your project folder Android Tools -> Fix Project Properties.

stupid of me sorry wish i could delete thread but am new to eclipse and android

No worries. A lesson learned and shared multiplies its value.