code: public static String generateCacheFileFullPath(Uri fileOriginalUri, File cacheDir, long createdTime) {
  		String source = fileOriginalUri.toString() + Long.toString(createdTime);
  		String fileName = md5(source);
  		File cacheFile = new File(cacheDir, fileName);
  		return cacheFile.getPath();
  	}
docs: /*
  Generate cached file name use md5 from file originalPath and created time