"Android" Eclipse does not open the solution and "Jar mismatch! Fix your dependencies "fix

JDK1.7 can use, cmd under the input JAVA,JAVAC,JAVA-VERSION,JAVAW configuration and environment are no problem, there may be work space problems, is generally in the D-disk under the workspace. That folder, delete it, and then open Eclipse.

After changing the workspace, some project re-import sometimes appears "Jar mismatch! Fix your dependencies "error.    , you will need to select a preference for the item you want to change, and then delete the library with X under the Android option because the jar package (Android-support-v4.jar) for the two items is inconsistent. The workaround is to remove all 2 jars and then add the latest jar packages to each one.