Android工程目錄下右擊有main方法的類
===> Run as
===> Run Configurations
===>雙擊java application
===> 單擊有main方法的類
===>選中classpath選項卡
===> remove掉Bootstrap Entries下的android.jar
===> 然後點擊advanced
===> Add Library
===>JRE System Library
===>next
===>最後finish
===>Run