/Java/How to check if user is logged in firebase android and then load another activity

How to check if user is logged in firebase android and then load another activity

 private FirebaseAuth firebaseAuth;
 FirebaseAuth.AuthStateListener mAuthListener;
    firebaseAuth = FirebaseAuth.getInstance();

      mAuthListener = new FirebaseAuth.AuthStateListener(){
                @Override
                public  void  onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth){
            FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        if(user!=null){
        Intent intent = new Intent(LoginActivity.this, MainActivity.class);
        startActivity(intent);
        finish();
}
                }


            };

Source: stackoverflow.com

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