Solution using 1.7 requires compiling with Android 4.4 (KitKat); Currently using API 4

Sometimes we may need to reduce the version of the project, such as 4.4 down to 2.2, and may encounter errors like this

Using 1.7 requires compiling with Android 4.4 (KitKat); Currently using API 4

In short, the problem with the JDK, the solution is: righ Click on your Project > Properties > Java compiler > Enable "Project specific settings" Se T Compiler compliance level to 1.6 re Build your project

Which is to modify the compiled JDK.

Reference from: http://www.cnblogs.com/xiaokang088/p/3829205.html

Solution using 1.7 requires compiling with Android 4.4 (KitKat); Currently using API 4