if (currentUser == null){ //check if the user is new then signIn anonymously
mAuth.signInAnonymously(). //.signInAnonymously is a method provided by Firebase
addOnCompleteListener(new OnCompleteListener<AuthResult>() { //insert a Listener that listen
@Override
public void onComplete(@NonNull Task<AuthResult> task) // insert a method that will executes when the process is completed
{
if (task.isSuccessful()) // check the required task is completed successfully
{
loginMessage.setVisibility(View.VISIBLE); //visible the text
progressBar.setVisibility(View.INVISIBLE); //inVisible the progressBar
}
}
})
.addOnFailureListener(new OnFailureListener() { //if the signin failed
@Override
public void onFailure(@NonNull Exception e) {
Log.e("TAG",e.getMessage()); //return error in logs
}
});
}