Every time we follow the update of Android system, Google will also update the Android compatibility definition document every year to ensure that OEM devices can normally preload Google's whole bucket service. Three months after Android 7.0 was launched, Google finally released Android Nougat's , for quick charging Vulkan API、 The new features of multi window and other contents have made many provisions, and the document is 85 pages long.

According to many media reports, many parts of the document reflect Google's desire to further strengthen control. For example, the "Android Extensions" already pre installed in Pixel and LG V20, as part of the AOSP source code, Google does not allow manufacturers to make any changes. Google should take over some core APIs, and can bypass OEM manufacturers to directly upgrade them, such as Google services, system core layer, etc., which is similar to the previous Play service. At the same time, it is also strongly recommended to adopt USB organization scheme for various fast charging standards. In addition, split screen multitasking must comply with AOSP specifications, must support call blocking, strongly recommended to add screen resolution adjustment, and standardized voice headset operation specifications, which can be called the most stringent regulations in history.

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