save value of a variable in a DialogFragment when the screen rotates

Question

Well, I wanted to save value of a variable contained in a dialogFragment when the screen is rotated in Android. I've tried every method I could find on the internet, and none of them has worked for me. Some kill my application, and others simply were not doing anything.

I need a real and effective way to save the value of an EditText that is reset when the device screen rotates. The EditText is in a DialogFragment turn this into a FragmentActivity.

thank you very much

Answer 1

Set your fragment's retaingInstance flag to true:

http://developer.android.com/reference/android/app/Fragment.html#setRetainInstance(boolean)

This prevents Fragment instance from being recreated.

Also be sure you don't recreate the fragment all the time:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_activity);

    if (savedInstanceState == null) {
        Fragment f = new Myfragment();
        f.setRetainInstance(true);
        getSupportFragmentManager().beginTransaction()
            .add(R.id.container, f))
            .commit();
    }

}

Since View state is preserved during Activity recreation and your are keeping the same Fragment instance you don't need to save TextView value all the time.