Eclipse Import Android Project Red Fork and red exclamation mark how to solve

The solution is as follows:
The first step: you want to make sure that the project is not a problem, some of the project itself is problematic, such as: XML files, Java programs and so on itself is wrong.
Step Two: Select "Project" In the Eclipse menu----" clean cannot resolve, next
The third step: Right-click on the project, select "Resource----" clean up "can not solve, see next
Fourth Step: Right-click the project and select "Build path..." To see if there is a virtual path under Libraries , if you delete it, please see the next step .
Fifth Step: Open the project.properties file, view the target=android-9 corresponding version number, in your SDK for this version, if not, please modify the version number, Please look at the next step.
Sixth Step: Right-click the project and select "Android Tools"--->Fix project Properties

Eclipse Import Android Project Red Fork and red exclamation mark how to solve