Each time you edit the XML file, you must clean up the entire Android project in Eclipse.

 android:layout_width="fill_parent"
 android:layout_height="fill_parent">
  android:id="@+id/map"
 android:layout_width="match_parent"
 android:layout_height ="match_parent"
 android:layout_alignParentTop="true"
 android:layout_alignParentLeft="true"
 class="com.google.android.gms.maps.MapFragment"
 map :uiRotateGestures="false"
 map:uiScrollGestures="false"
 map:uiZoomControls="false"
 map:uiZoomGestures="false" 
 map:cameraZoom="18" 
 />
  android:id="@+id/scroller"
 androi d:layout_width="250dp"
 android:layout_height="100dp"
 android:layout_alignParentTop="true"
 android:layout_alignParentLeft="true"
 android:background="@ android:color/white">
  android:id="@+id/debug_text"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent" 
 android:textSize="10sp"

 />
 

Unexpected namespace prefix "xmlns" found for tag fragment

Unexpected namespace prefix "map" found for tag fragment

I have an annoying problem. I am in my Android project Using Fragment, it makes me feel endless pain because I have to clean up the project every time I edit the main xml file. This is what it looks like:

 android:layout_width= "fill_parent"
 android:layout_height="fill_parent">
  android:id= "@+id/map"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_alignParentTop="true"
 android:layout_alignParentLeft="true "
 class="com.google.android.gms.maps.MapFragment"
 map:uiRotateGestures="false"
 map:uiScrollGestures="false"
 map:uiZoomControls= "false"
 map:uiZoomGestures ="false" 
 map:cameraZoom="18"
 />
  android:id="@+id/scroller"
 android:layout_width= "250dp"
 android:layout_height="100dp"
 android:layout_alignParentTop="true"
 android:layout_alignParentLeft="true"
 android:background="@android:color/ white">
  android:id="@+id/debug_text"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:textSize="10sp"

 />
 

If I even edit one character of the file, Then all lines starting with “map” will be highlighted in red, and the fragment start tag will also be highlighted. The error I get is:

Unexpected namespace prefix "xmlns" found for tag fragment

For the line starting with “map”, the error is:

Unexpected namespace prefix "map" found for tag fragment

If I clean up the project, the problem will disappear, I can build and run the project very well, but since I am editing it a lot now, it is very annoying. Can anyone help?

In Eclipse, you can go to Project -> Automatic Build, which should include a clean process. You can also use adb to build ANT scripts, and use The build.xml file sets the cleanup target as part of the build.