src/main/java/com/simpligility/maven/plugins/android/phase09package/ApkMojo.java
private void addResourcesFromFolder( ApkBuilder builder,  File folder )
            throws SealedApkException, DuplicateFileException, ApkCreationException, IOException
    {
        final int folderPathLength = folder.getCanonicalPath().length();

        final List<File> resourceFiles = new ArrayList<>(  );
        collectFiles( folder, resourceFiles );

        for ( final File resourceFile : resourceFiles )
        {
            final String resourceName = resourceFile
                    .getCanonicalPath()
                    .substring( folderPathLength + 1 )
                    .replaceAll( "\\\\", "/" );
            getLog().info( "Adding resource " + resourceFile + " : " + resourceName );
            builder.addFile( resourceFile,  resourceName );
        }
    }
private void addResourcesFromFolder( ApkBuilder builder,  File folder )
            throws SealedApkException, DuplicateFileException, ApkCreationException, IOException
    {
        final int folderPathLength = folder.getCanonicalPath().length();

        final List<File> resourceFiles = new ArrayList<>(  );
        collectFiles( folder, resourceFiles );

        for ( final File resourceFile : resourceFiles )
        {
            final String resourceName = resourceFile
                    .getCanonicalPath()
                    .substring( folderPathLength + 1 )
                    .replaceAll( "\\\\", "/" );
            getLog().info( "Adding resource " + resourceFile + " : " + resourceName );
            builder.addFile( resourceFile,  resourceName );
        }
    }
Adds all non-class files from folder, so that we can add META-INF/services resources.