		Matcher matcher=patternPack.matcher(result);
		if(matcher.find())
			apkInfo.packIdentity=matcher.group(1);
		matcher=patternMainActivity.matcher(result);
		if(matcher.find())
			apkInfo.launcherActivity=matcher.group(1);
		
		return apkInfo;
	}
	/**
	 * extract file from apk
	 * @param apkPath
	 * @param fileInApk
	 * @param output   if output is not end with "/" or "\" ,it will be treated as a file  
	 * @throws IOException