Tool: eclipse3.7.2
Upgrade ADT: from ADT-22.3.0 to ADT-23.0.2
Error message:
cannot complete the install because of a conflicting dependency. Software being installed: Android Development Tools 23.0.2.1259578 ( com.android.ide.eclipse.adt.feature.feature.group 23.0.2.1259578) software currently installed: Android Development Tools 22.3.0.v201310242005-887826 ( com.android.ide.eclipse.adt.feature.group 22.3.0.v201310242005-887826) only one of the following can be installed at once: adt XML Overlay 23.0.2.1259578 (overlay.com.android.ide.eclipse.adt.overlay 23.0.2.1259578) ADT XML Overlay 22.3.0.v201310242005-887826 ( overlay.com.android.ide.eclipse.adt.overlay 22.3.0.v201310242005-887826) Cannot satisfy dependency: from: android development tools 23.0.2.1259578 (Com.android.ide.eclipse.adt.feature.feature.group 23.0.2.1259578) to: overlay.com.android.ide.eclipse.adt.overlay [ 23.0.2.1259578] cannot satisfy dependency: from: android Development Tools 22.3.0.v201310242005-887826 (Com.android.ide.eclipse.adt.feature.group 22.3.0.v201310242005-887826) to: overlay.com.android.ide.eclipse.adt.overlay  [22.3.0.V201310242005-887826]
First step: Uninstall the old ADT Plugin
Eclipse--help--about eclipse--installation details--installed Software
Select the old ADT plugin--uninstall
[Note: For a version that has been updated successfully, 22.3.0.v201310242005-887826 before upgrade]
Step Two: Install the new ADT Plugin
Eclipse--help--install New Software--add
name:adt-23.0.2
Location: Click Archive to select the downloaded ADT zip package "jar:file:/d:/android-develop/adt-23.0.2.zip!/"
or from http://dl-ssl.google.com/android/eclipse Update
Restart eclipse after the update is complete!
ADT plugin Download:http://dl.google.com/android/ADT-23.0.2.zip
Http://developer.android.com/sdk/installing/installing-adt.html