How to manually update the android SDK?

            
I was only android2.3.3 my machine is android 2.3.1

Not run the program compiledBut I can not update this android2.3.1 the SDK, how to manually update? Really well done, can only run on the emulator, and now I want to write application debugging hardware drivers, hardware drivers I have written.
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Halo, has long been solved. Thunder download updates get.
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We Come pick points ah.
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These are the landlord ah! Bar with the latest SDK
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Brother expressed scores look very pale. . .
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Why it manually?
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Why are old hands landlord moving ah ah
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Look here:

Android SDK Manager to upgrade to version 20, install Android 4.0 and later http://blog.csdn.net/aminfo/article/details/7788614
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reference to the 7th floor of replies:

look here:

Android SDK Manager to upgrade to version 20, install Android 4.0 and later http://blog.csdn.net/aminfo/article/details/7788614

Yes, yes. Even appreciation, give points to points.
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Like this one ~ ~ ~