Baidu found an article about
[System source code analysis-android_id generation: https://blog.csdn.net/shuang__zi/article/details/103423257 ]
However, the android_id acquisition algorithm has changed in android8.0 and above, and the acquisition of each application is different
Next, we will study the generation algorithm of android_id in the high version system
According to [Change the device ID on the Android emulator? : Https://www.thinbug.com/q/4686263 ] The new version of android_id mentioned here is stored in the path /data/system/users/(user_id)/settings_ssaid.xml, and find a tool that can query and modify android_id [Oreo device ID Changer: https://github.com/CoNsTaRs/oreo_device_id_changer ], but root permission is required.