Android extras getting lost on onBackPressed()

Question

I'm attempting to save some data in intent, so when the user visits another screen or presses the back button, and comes back, the data persists. Essentially storing the state of a screen.

So you're in Fragment 1, you navigate to Activity 2 (important data is here), if you leave activity 2 by pressing back or through another way when you come back the data is still there.

Here's where I start Activity 2 from Fragment 1

intent = new Intent(getActivity(), DeliveryPageActivity.class);
...
startActivityForResult(intent, 

Here's where I'm currently trying the solve the problem

@Override
public void onBackPressed() {

    //saving here (working okay)
    storeIntent.putExtra("currentDelivery", pageIndicatorView.getCurrentPage());
    setResult(RESULT_OK, storeIntent);
    super.onBackPressed();
}

@Override
protected void onResume() {
    super.onResume();

    //restoring here (NOT WORKING, intent has no extras)
    if (storeIntent.hasExtra("currentDelivery")) {
        currentDelivery = storeIntent.getIntExtra("currentDelivery", currentDelivery);
        pageIndicatorView.setCurrentPage(currentDelivery, true);
    }
}

And starting a new intent in onCreate()

    storeIntent = new Intent();

Answer 1

Try override onPause instead of onBackPressed in your Activity 2. See docs for activity lifecycle

Edit: Sorry just tested. In your case, i would use SharedPreferences to restore and override OnPause (get's called when back button is pressed) and onResume like this:

@Override
protected void onPause() {
    super.onPause();
    SharedPreferences sp = this.getSharedPreferences("myPrefsName", MODE_PRIVATE);
    SharedPreferences.Editor editor = sp.edit();
    editor.putInt("currentDelivery",pageIndicatorView.getCurrentPage());
    editor.apply();
}

@Override
protected void onResume() {
    super.onResume();
    SharedPreferences sp = this.getSharedPreferences("myPrefsName", MODE_PRIVATE);
    testState = sp.getInt("currentDelivery", 0);
}