通过People provider以及URI获取本地通讯录资
当程序有必要调用本地通讯录时,可以通过Contacts.People方便的获取指定的资源。在Android平台中获取任何资源都需要借助相应的Content provider,而Content provider可能会同时具备多个Data sets(multiple tables),而每个set都有各自独立的对外公开的URI。
当程序有必要调用本地通讯录时,可以通过Contacts.People方便的获取指定的资源。在Android平台中获取任何资源都需要借助相应的Content provider,而Content provider可能会同时具备多个Data sets(multiple tables),而每个set都有各自独立的对外公开的URI。
比较onSaveInstanceState() 与 onRetainNonConfigurationInstance()在不同需求中的用法
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