Yesterday hand the Android SDK upgrade, and then get the ADT version does not correspond, and then search from the Internet some methods ~ effect can also, reinstall ADT.
The method for uninstalling ADT is as follows (my eclipse version is 3.5):
1. Choose Help > Install New software;
2. In the Details panel, click on the "What is already installed?" link;
3. In the Eclipse Installation Details dialog box, select "Android DDMS" and "Android development Tools", then click Uninstall;
4. In the next window, confirm the ADT to be deleted, then click Finish to delete it;
5. Restart Eclipse.
The address for installing the ADT plugin is https://dl-ssl.google.com/android/eclipse/, and you can see the options by selecting Help > Install New software. Alternatively, you can download the offline installation package at the official address and install it in this interface. Direct decompression is not recommended to paste into the Eclipse directory.
How to install, uninstall ADT in Eclipse, or update ADT