Good afternoon,
I have to start a project where I will integrate the option to issue an NFe into an Android sales application . What is the best way to start this process, would it be to complete the whole process on Android or through a Web Service ? Is there any library or API that supports development?
I believe that the Web Service is the best option, because to make the request for NFE you need to have the certificate installed, if you did this on android you would have to manage the certificate on each device that the app is installed in the WebService you can mount the stack for concurrent requests * (or when it becomes unavailable on the recipe server ...) and manages the certificate in a single place.
It depends on the scope of the project, if it is to develop for small businesses where only one device will issue note, do everything in the android environment, if several devices will send nf-and use a webservice, as Bartolomeu spoke requisition will become easier to develop.
If you use PHP to develop webservice take a look at this github repository. link
Credits and official website link
mount a PHP server install the NFEPHP API, with it you do not need to install the digital certificate in the app only on the server.
Once you have created and configured the PHP web server with the NFEPHP API running and considering that you have a Java knowledge for ANDROID / IOS, start with webview.
Good luck ...
