staticfactor4.java

// sender
public class LoginActivity extends Activity {
  void displayHome() {
    startActivity(HomeActivity.newIntent(this, user));
  }
}

// receiver
public class HomeActivity extends Activity {
  private static final String KEY_USER = "KEY_USER";
  
  public static Intent newIntent(Context context, String user) {
    Intent intent = new Intent(context, HomeActivity.class);
    intent.putExtra(KEY_USER, user);
    return intent;
  }
  
  @Override public void onCreate(Bundle bundle) {
    ...
    String user = getIntent().getStringExtra(KEY_USER);
  }
}