How to send variables from Main activity to multiple activities in android?

Iam trying to create an application that have

1. MainActivity
   it is a login page , it contain 4 variable, when i click the login button, it goes to another activity HomeTab using an intent
   Intent i = new Intent(FirstMain.this,Home_tab.class);
startActivity(i);

2. HomeTab - it has three Tab views.
   a. Profile
   b. Account
   c. Settings
   

My problem is how to pass that 4 variables from the MainActivity to the 3 activities in the Tab

you have two options.

1. you can use intent.
2. you can use sharedpreferences.