Every time I open Eclipse, I get the following error messages:
Android SDK Content Loader: parseSdkContent failed java.lang.NullPointerException
Initializing Jav
This solution worked for me.
Close Eclipse and delete all .markers inside your workspace folder.
Restart Eclipse (once I had to restart it twice, it hang on the first but worked on the second for no aparent reason).
Of course, it's always safe to back them up first.