Saving some orientation data in Android

Question

As I understand it, your Android activity will be recreated for a new orientation with any orientation changes.

Is there a way to save / save some data from the original orientation when changing the orientation?

I would like to save some bitmaps, so I don’t need to load them again when the orientation changes.

Answer 1

Using static variables / classes is a poor approach in terms of maintainability and debugging.

---

Activity.onRetainNonConfigurationInstance, , (, ). Activity.onRetainNonConfigurationInstance

, Activity.getLastNonConfigurationInstance, , onRetainNonConfigurationInstance. null ( / ). Activity.getLastNonConfigurationInstance

:

onRetainNonConfigurationInstance:
    return "I need to remember this next time";

onCreate:
    ...
    String messageToShow = null;
    Object data = getLastNonConfigurationInstance();
    if(data != null)
        messageToShow = (String)data;
    else
        messageToShow = "Nothing to show";

---

, 2.x.x, . Google Fragment.setRetainInstance. compability.

Fragment.setRetainInstance

Answer 2

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, , . : http://developer.android.com/guide/topics/resources/runtime-changes.html

Answer 3

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Answer 4

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Answer 5

you can try using sharedpreferences:

editor edit = preferences.edit(); edit.putString("username", "new_value_for_user"); edit.commit();