Google officially released the second developer preview of Android 7.1.1 in the early morning of November 23, Beijing time. The new system mainly expands the support equipment lineup and makes some functional updates, but everyone should not have too high expectations. In terms of functions, the second preview version of the developer updated the SDK building and platform tools in Android Studio, Android 7.1.1 platform and API Level 25 simulator system, and also updated the support library of the latest version 25.0.1. It is expected that Google will launch the official version of Android 7.1.1 in December, when the third-party mobile phone manufacturers using Android system can start the modification and testing of the new system version. However, judging from the current upgrade progress of Android 7.0, the actual launch of 7.1.1 to users is still far away, and Samsung, which has the largest market share, is still conducting internal testing, There are only a few Android 7.0 models followed by other manufacturers.

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