I have nullpointer exception.

Function in MainActivity.

```
public void intentLoginUser(){
    Intent aux = new Intent(MainActivity.this, LoginUserSplashScreen.class);

    aux.putExtra("user", username);
    aux.putStringArrayListExtra("notificationList", MainActivity.this.notificationsList);
    aux.putStringArrayListExtra("friendList", MainActivity.this.friendList);
    aux.putStringArrayListExtra("localizationList", MainActivity.this.localizationList);

    MainActivity.this.startActivity(aux);
}

```

Function in another Activity, named LoginUserSplashScreen

```
 public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    this.requestWindowFeature(Window.FEATURE_NO_TITLE);    // Removes title bar
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,     WindowManager.LayoutParams.FLAG_FULLSCREEN);    // Removes notification bar
    notificationList = getIntent().getStringArrayListExtra("notificationList");
    friendList = getIntent().getStringArrayListExtra("friendList");
    localizationList = getIntent().getStringArrayListExtra("localizationList");
    myUsername = getIntent().getStringArrayListExtra("user");
    Log.e("Erro Aqui YA?", myUsername.get(0));
    setContentView(R.layout.activity_loginuser);}

```

What's wrong?
I have nullpointer in function `onCreate`, in `Log.e();` ... I'm trying debugging that, but I can't.

EDIT - Nullpointer in function `onCreate` in line `Log.e()`
Because all lists are null (can't get anything from last activity).