I was using Eclipse Indigo and the Content Assist was working properly. But when I installed Eclipse Indigo, I found that Content Assist ctrl+space is not working. What I did is, creating new work space and imported the old project I created into the new work space created in Eclipse juno.
Now, the Content Assist is working but all the projects I imported are marked with red "X" and this is my problem.
Console Output:
[2013-05-24 22:40:12 - TestCreatOptionMenu] Unable to resolve target 'Google
Inc.:Google APIs:10'
[2013-05-24 22:40:12 - WeatherFragment] Unable to resolve target 'Google Inc.:Google
APIs:8'
[2013-05-24 22:40:12 - Vortex2] Unable to resolve target 'Google Inc.:Google APIs:10'
[2013-05-24 22:40:12 - URLTagger] Unable to resolve target 'android-10'
[2013-05-24 22:40:12 - URLHandler] Unable to resolve target 'android-8'
[2013-05-24 22:40:13 - TouchEvent] Unable to resolve target 'Google Inc.:Google
APIs:10'
[2013-05-24 22:40:13 - ToggleButtonDemo] Unable to resolve target 'android-10'
[2013-05-24 22:40:13 - TimeDateTest] Unable to resolve target 'Google Inc.:Google
APIs:10'
[2013-05-24 22:40:13 - ThumbnailCameraPicture] Unable to resolve target 'Google
Inc.:Google APIs:10'
[2013-05-24 22:40:13 - Text_Image_Switcher] Unable to resolve target 'android-10'
[2013-05-24 22:40:13 - TestXML] Unable to resolve target 'Google Inc.:Google APIs:10'
[2013-05-24 22:40:13 - TestOnKeyPressed] Unable to resolve target 'android-10'
[2013-05-24 22:40:13 - TestLocation] Unable to resolve target 'Google Inc.:Google
APIs:10'
[2013-05-24 22:40:13 - Test9] Unable to resolve target 'android-10'
[2013-05-24 22:40:13 - Test4] Unable to resolve target 'Google Inc.:Google APIs:8'
[2013-05-24 22:40:13 - Test3] Unable to resolve target 'android-10'