Once the software for Android os chat initiate, it should find out if the user are closed in

1: Handle Individual Sign-In

In that case, the application is going ahead and exhibit the contents of the talk room. Or else, it should redirect an individual to either a sign-in display or a sign-up monitor. With FirebaseUI, generating those displays takes a lot less code than you may envision.

Within the onCreate() way of MainActivity , check if an individual is finalized in. To get this done, verify that the existing FirebaseUser item is not null . Whether or not it’s null , it is vital that you produce and arrange an Intent object that starts a sign-in activity. To do this, utilize the SignInIntentBuilder course. When the purpose is ready, you should launch the sign-in task utilising the startActivityForResult() process.

Keep in mind that the sign-in task furthermore allows new users to sign up. Therefore, it’s not necessary to write any additional rule to control individual enrollment.

Clearly inside the earlier laws, in the event the user has already been signed in, we initially highlight a Toast inviting the consumer, after which contact an approach known as displayChatMessages. For the present time, merely produce a stub for it. We are going to feel including rule to they later.

As soon as the individual features signed in, MainActivity will get a result in the shape of an intention . To handle they, you need to override the onActivityResult() cupid chat room technique.

If outcome’s laws was RESULT_OK , it indicates an individual features finalized in successfully. In that case, you have to name the displayChatMessages() strategy once again. Usually, contact finish() to shut the software.

Step 2: Handle User Sign-Out

Automatically, FirebaseUI utilizes practical Lock for Passwords. Thus, when the consumers sign in, they are going to remain finalized in even if the application is restarted. Allowing the people to signal out, we will today create a sign-out choice to the overflow menu of MainActivity .

Create a new selection resource document known as main_menu.xml and add an individual item to they, whose concept attribute is scheduled to Sign down. The items in the file should look such as this:

To instantiate the diet plan source inside MainActivity , override the onCreateOptionsMenu() method. Then name the inflate() technique of the MenuInflater item.

Further, override the onOptionsItemSelected() way to manage click events about selection product. In the process, you can easily call the signOut() approach to the AuthUI lessons to signal the user . Because sign-out operation is performed asynchronously, we’re going to include an OnCompleteListener to they.

The moment the consumer has actually signed on, the app should nearby instantly. This is why exactly why you discover a call for the finish() process during the code above.

5. Build A Product

To keep the chat communications into the Firebase realtime databases, you have to create a product on their behalf. The layout regarding the chat information, which we developed earlier on inside guide, has actually three horizon. To populate those views, the unit too need to have about three fields.

Make a brand new Java class also known as ChatMessage.java and incorporate three affiliate factors to they: messageText , messageUser , and messageTime . Additionally, create a constructor to initialize those factors.

To help make the design suitable for FirebaseUI, you have to also add a standard constructor to they, along with getters and setters for the associate variables.

6. Post A Cam Message

Within the listener, you must 1st bring a DatabaseReference object utilising the getReference() technique of the FirebaseDatabase course. After that you can call the push() and setValue() strategies to create latest instances of the ChatMessage lessons into the real-time database.

The ChatMessage instances must, however, getting initialized using the contents of the EditText additionally the display label on the at this time signed-in individual.