android文档笔记（1）

摘要: Implementing your activity lifecycle methods properly ensures your app behaves well in several ways, including that it

Does not crash if the user receives a phone call or switches to another app while using your app.

Does not consume valuable system resources when the user is not actively using it.

Does not lose the user's progress if they leave your app and return to it at a later time.

Does not crash or lose the user's progress when the screen rotates between landscape and portrait orientation.