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Activity: Как пережить поворот экрана?

При повороте экрана активити уничтожается и создается заново. Вызываются коллбэки onPause(), onStop(), onSaveInstanceState(), onDestroy() – onCreate(), onStart(), onRestoreInstanceState(), onResume().

Чтобы сохранить состояние активити, вы должны переопределить метод onSaveInstanceState() и положить данные в Bundle.

При реинициализации активити, Bundle с сохраненным состоянием передается в onCreate() и в onRestoreInstanceState().

Система вызывает onSaveInstanceState() и onRestoreInstanceState() только в том случае, когда необходимо сохранить состояние, например при повороте экрана или при убийстве активити для освобождения памяти. Данные коллбэки не вызываются, если пользователь выходит из активити нажав Back или если активити убивается вызовом finish().

onSaveInstanceState() вызывается после onStop() на версии API ≥ 28. На API < 28 этот коллбэк вызывается перед onStop() и нет гарантий до или после onPause().

onRestoreInstanceState() вызывается после onStart().

#Activity
#Lifecycle
#State

Android Interview Review
Activity: Как пережить поворот экрана?

При повороте экрана активити уничтожается и создается заново. Вызываются коллбэки onPause(), onStop(), onSaveInstanceState(), onDestroy() – onCreate(), onStart(), onRestoreInstanceState(), onResume().

Чтобы сохранить состояние активити, вы должны переопределить метод onSaveInstanceState() и положить данные в Bundle.

При реинициализации активити, Bundle с сохраненным состоянием передается в onCreate() и в onRestoreInstanceState().

Система вызывает onSaveInstanceState() и onRestoreInstanceState() только в том случае, когда необходимо сохранить состояние, например при повороте экрана или при убийстве активити для освобождения памяти. Данные коллбэки не вызываются, если пользователь выходит из активити нажав Back или если активити убивается вызовом finish().

onSaveInstanceState() вызывается после onStop() на версии API ≥ 28. На API < 28 этот коллбэк вызывается перед onStop() и нет гарантий до или после onPause().

onRestoreInstanceState() вызывается после onStart().

#Activity
#Lifecycle
#State
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Telegram might soon let you protect your account by linking it to your email

Telegram is reportedly working on a new way to help users protect their accounts. The upcoming feature will let you link your account to an email ID, and Telegram will use it for verification every time you log in from a new device.Although Telegram has not shared any details officially, app developer and prolific reverse engineer Alessandro Paluzzi has managed to grab a few screenshots showcasing the in-development feature. As you can see in the attached tweets, the feature will give users the option to add an email ID “to protect your account.” The feature will also include a Sign in with Google option for Gmail users.

Activity: Как пережить поворот экрана?

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