Resource filters are used when generating additional APK containing only specific resources. The previous UI allowed for any type of filters, but we are moving to a simpler way with fixed filters. The first one is the density. Selecting the filter will generate 4 APKs per application: default (all resources), hdpi (only hdpi/nodpi and default resources), mdpi, ldpi.
Using the Eclipse projects for ddmuilib. ddmuilib requires SWT to compile. SWT is available in the depot under prebuild/<platform>/swt Because the build path cannot contain relative path that are not inside the project directory, the .classpath file references a user library called ANDROID_SWT. In order to compile the project, make a user library called ANDROID_SWT containing the jar available at prebuild/<platform>/swt.