android - R.java not genereated in a New eclipse project -


i'm trying learn develop android applications , i'm using eclipse, installed android sdk , eclipse , able make couple of basic examples updated sdk lates reviews , eclipse not generating r.java anymore, read lot of forums same problem responses releated errors 1 code , errors on xml's create new project defaults , not touching line or configuration , don't have r.java can't run project i've clean project 100 times , reinstalled couple of times nothing works, totally frustrate, change windows 8 pc mac , found same problem. have suggestion?

thanks


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