Apps Newbie needs help with logcat

[coinage23]

Hey! I'm new to android programming and I need some help. The program doesn't run at all :/ I've no idea why.. Can someone say what this means:


08-03 13:17:05.894: W/dalvikvm(8991): threadid=1: thread exiting with uncaught exception (group=0x41d78700)
08-03 13:17:05.899: E/AndroidRuntime(8991): FATAL EXCEPTION: main
08-03 13:17:05.899: E/AndroidRuntime(8991): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.thelostdiamond/com.example.thelostdiamond.MainActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f05004d (com.example.thelostdiamond:id/container) for fragment PlaceholderFragment{427ef020 #0 id=0x7f05004d}
08-03 13:17:05.899: E/AndroidRuntime(8991): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295)
08-03 13:17:05.899: E/AndroidRuntime(8991): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)


Thanks in advance!

 

[LastAtaman]

Did you declare your acitivity in manifest file ?