Convert existing project into Android project in Eclipse?

You need to change the nature of the project (this has already been answered, but nobody gave the actual string you need for that.)

  • Close eclipse
  • Open the .project file in your project
  • Make the natures section look like:

    <natures>
        <nature>com.android.ide.eclipse.adt.AndroidNature</nature>
        <nature>org.eclipse.jdt.core.javanature</nature>
    </natures>
    

Start eclipse again, have fun.

Note: If you are using maven you can configure the project’s nature in your pom, see the maven eclipse plugin doc

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