Generally you access the files through getResources().openRawResource(R.id._your_id). If you absolutely need a File reference to it, one option is to copy it over to internal storage:
File file = new File(this.getFilesDir() + File.separator + "DefaultProperties.xml");
try {
InputStream inputStream = resources.openRawResource(R.id._your_id);
FileOutputStream fileOutputStream = new FileOutputStream(file);
byte buf[]=new byte[1024];
int len;
while((len=inputStream.read(buf))>0) {
fileOutputStream.write(buf,0,len);
}
fileOutputStream.close();
inputStream.close();
} catch (IOException e1) {}
Now you have a File
that you can access anywhere you need it.