eclipse - Error in all android projects -


i have been using eclips android programming since 6 months. working smooth till yesterday.

on restarting eclipse shows error on every project , of them say:

unable resolve target 'android-21'.

and can't create new project says

base theme "holo light dark action bar" requires build target api version of @ least 14, , current version 8

and cant start sdk manager eclipse. please help, , thank in advance. :)

go windows -> android sdk manager install android api level want, in case 21.

once you've finished installing, go window -> preference -> android. should list of available targets. click apply ok.

now right click project, go properties. click android. choose desired target.


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