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Build voice and video chat app by using Android, Firebase, and CometChat Android UI Kit

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How to Build a Voice & Video Chat App in Java

Read the full tutorial here: >> How to Build a Voice & Video Chat App in Java

This example shows How to Build a Voice & Video Chat App in Java:

Live Demo

How to Build a Voice & Video Chat App in Java

Technology

This demo uses:

  • Android
  • CometChat Android UI Kit
  • Firebase

Running the demo

To run the demo, you need to have Android Studio installed on your computer and follow these steps:

  1. Head to CometChat Pro and create an account
  2. From the dashboard, add a new app called "voice-video-chat-app"
  3. Select this newly added app from the list.
  4. From the Quick Start copy the APP_ID, APP_REGION and AUTH_KEY. These will be used later.
  5. Also copy the REST_API_KEY from the API & Auth Key tab.
  6. Navigate to the Users tab, and delete all the default users and groups leaving it clean (very important).
  7. Download the repository here or by running git clone https://github.com/hieptl/voice-video-chat-app.git and open it in a code editor.
  8. Head to Firebase and create a new project
  9. Create a file called Constants.java in the package folder of your project.
  10. Import and inject your secret keys in the .env file containing your CometChat and Firebase in this manner.
public interface Constants {
    String COMETCHAT_APP_ID = xxx-xxx-xxx-xxx-xxx-xxx-xxx-xxx;
    String COMETCHAT_REGION = xxx-xxx-xxx-xxx-xxx-xxx-xxx-xxx;
    String COMETCHAT_AUTH_KEY = xxx-xxx-xxx-xxx-xxx-xxx-xxx-xxx;
    String FIREBASE_REALTIME_DATABASE_URL = xxx-xxx-xxx-xxx-xxx-xxx-xxx-xxx;
    String FIREBASE_EMAIL_KEY = "email"; // this is not a secret value, it is just a constant variable that will be accessed from different places of the application.
    String FIREBASE_USERS = "users"; // this is not a secret value, it is just a constant variable that will be accessed from different places of the application.
}
  1. Make sure to include the Constants.java file in your gitIgnore file from being exposed online.

Questions about running the demo? Open an issue. We're here to help ✌️

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Build voice and video chat app by using Android, Firebase, and CometChat Android UI Kit

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