导入工程时，有关Open the Java build path property page of project 的一些错误导致包里面出现错误，进而文件里大部分引用都找不到位置而出现满屏幕都是红色的小x。
解决：
将project.properties中的target= android-X 改成你对应的版本，以及AndroidManifest.xml中的<uses-sdk android:minSdkVersion="X" /> 也改成你对应的版本。再导入就能正常工作了！
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