Compile under Ubuntu

[acocalypso]

Hey everyone, i tried to compile it under Ubuntu, after setting up everything i loaded the project into eclipse.

i fixed some errors, but dunno how to handle them:

Description Location Type Resource Path
NativeActivity cannot be resolved to a type line 5 Java Problem PpssppActivity.java /org.ppsspp.ppsspp.PpssppActivity/src/org/ppsspp/ppsspp
The import com.henrikrydgard cannot be resolved line 3 Java Problem PpssppActivity.java /org.ppsspp.ppsspp.PpssppActivity/src/org/ppsspp/ppsspp

would be nice if someone can help me