Changing Project to Android Project in Eclipse

I wrote an android application in eclipse that was working fine. Today i created a dynamic web project in eclipse using a tomcat server. However, when i tried to continue working on my android Project, I wasn't able to launch it anymore, because it showed Run-As "Run on server" only. Thus I went into Run-Configurations and set up an Android run configuration. However, when executing it, I get the message "Installation error: Unknown failure" suggesting to check in LogCat level error:

12-04 00:32:36.474: E/ctxmgr(13044): [PowerConnectionState]Could not write powerInfo=Plug state: 2 BatteryLevel: 0.99, status=Status{statusCode=unknown status code: 7503, resolution=null} 12-04 00:32:45.804: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:32:45.814: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:33:01.474: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:33:01.484: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:33:17.134: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:33:17.134: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:33:32.794: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:33:32.794: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:33:48.454: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:33:48.464: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:34:04.114: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:34:04.124: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:34:19.794: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:34:19.804: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS 12-04 00:34:34.474: E/dalvikvm(27413): Bogus static initialization: value type 6 in field type I for Landroid/media/ToneGenerator; at index 78 12-04 00:34:34.474: E/dalvikvm(27413): VM aborting 12-04 00:34:34.474: A/libc(27413): Fatal signal 11 (SIGSEGV) at 0xdeadd00d (code=1), thread 27413 (app_process) 12-04 00:34:35.464: E/wpa_supplicant(16698): ctrl_iface cmd = AP_SCAN 1 12-04 00:34:35.464: E/wpa_supplicant(16698): ctrl_iface cmd = SCAN_RESULTS

I already restarted eclipse, but I'm running out of ideas what to do next. Is there a way to fix this? Or does one have to use 1 installation of eclipse for each language? I just want to tell the project that it is android and not intended to run on a web server. I think this would do the trick, but I dont know how to.