Downloading the Android SDK
Go to http://developer.android.com/sdk/index.html and download the latest version. At the time of this writing, the latest version is R12, or release 12. Installing an SDK is easy: just download and extract the files. I place mine in the root of my hard drive in a folder called SDK and differentiate the files by version number. When you extract the Android SDK it should give you a folder with a name similar to SDK/android-sdk-r12-mac_x86.
Installing the ADT Plug-in for Eclipse
For Eclipse to work with Android, we have to install a new
plug-in. Go to Help→Install New Software, and then click the big Add
button on the right side of this screen. Here, you need to type in the
URL of the ADT install site as follows: https://dl-ssl.google.com/android/eclipse/. For the name,
you can enter ADT Android and
click OK. This will search for the
install site; when it is found, select all the options under Developer
Tools, click Next, and then click Next again on the review screen.
Accept the terms and click Finish. This should install everything you
need. You might see a pop up saying you are about to install unsigned
content; this is the same pop up I mentioned during the FDT
installation. You can click OK here. If everything is installed
successfully, you will be presented with one final dialog. Just click
the Restart Now button.
The last step of the Android ADT installation is to point to the Android SDK we downloaded earlier. Open up Eclipse’s preferences and click ...