I have download ADT 21.1, and tried install it on eclipse enter image description here

I got those:

The operation cannot be completed. See the details.

Details:

Cannot complete the request. See the error log for details.

Tracer for OpenGL ES will be ignored because it is already installed, and updates are not permitted.

Android DDMS will be ignored because it is already installed, and updates are not permitted.

Android Development Tools will be ignored because it is already installed, and updates are not permitted.

Android Traceview will be ignored because it is already installed, and updates are not permitted.

Android Hierarchy Viewer will be ignored because it is already installed, and updates are not permitted.

enter image description here

When I reopen SDK Manager, I still got this: enter image description here

In Windows->Preference->Android, I got this: enter image description here

Thus, I wanna reintall ADT, but I found I can't uninstall any Plug In, Uninstall.. button is gray! enter image description here

android adt
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