Best practice for instantiating a new Android Fragment

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Android

If Android decides to recreate your Fragment later, it's going to call the no-argument constructor of your fragment. So overloading the constructor is not a solution.

With that being said, the way to pass stuff to your Fragment so that they are available after a Fragment is recreated by Android is to pass a bundle to the setArguments method.

So, for example, if we wanted to pass an integer to the fragment we would use something like: 

  public static MyFragment newInstance(int someInt) {
      MyFragment myFragment = new MyFragment();

      Bundle args = new Bundle();
      args.putInt("someInt", someInt);
      myFragment.setArguments(args);

      return myFragment;
  }

And later in the Fragment onCreate() you can access that integer by using: 

getArguments().getInt("someInt", 0);

This Bundle will be available even if the Fragment is somehow recreated by Android.

Also note: setArguments can only be called before the Fragment is attached to the Activity.

THI0