Java

Generate JWTs

You need to generate a JWT for each user. The JWT is used to authenticate the user. Run the following commands, remember to replace the APPLICATION_ID variable with id of your application and PRIVATE_KEY with the name of your private key file.

NOTE: To quickly get your application id you can run the Vonage CLI command, vonage apps, to view a list of your applications.

For Alice:

vonage jwt --app_id=APPLICATION_ID --subject=Alice --key_file=./PRIVATE_KEY --acl='{"paths":{"/*/users/**":{},"/*/conversations/**":{},"/*/sessions/**":{},"/*/devices/**":{},"/*/image/**":{},"/*/media/**":{},"/*/push/**":{},"/*/knocking/**":{},"/*/legs/**":{}}}'

And for Bob:

vonage jwt --app_id=APPLICATION_ID --subject=Bob --key_file=./PRIVATE_KEY --acl='{"paths":{"/*/users/**":{},"/*/conversations/**":{},"/*/sessions/**":{},"/*/devices/**":{},"/*/image/**":{},"/*/media/**":{},"/*/push/**":{},"/*/knocking/**":{},"/*/legs/**":{}}}'

The above commands set the expiry of the JWT to one day from now, which is the maximum.

Make a note of the JWT you generated for each user:

terminal screenshot of a generated sample JWT

NOTE: In a production environment, your application should expose an endpoint that generates a JWT for each client request.

Further information

Creating an Android chat app

Create a Android application that enables users to message each other using the Android Client SDK and Java.

Steps
1
Introduction to this task
2
Prerequisites
3
Create a Vonage Application
4
Create a conversation
5
Create the users
6
Add users to the conversation
7
Generate JWTs
8
Create an Android project
9
Add permissions
10
Build main screen
11
Initialize the client
12
Fetch the conversation
13
Fetch conversation events
14
Send a message
15
Receive new messages
16
What's next?