解决方法
我发现它隐藏在设置菜单中以改善用户体验.您可以在设置>上点击7次随时激活它.关于手机>内部编号
来自官方android documentation：
On devices running Android 4.2,developer options are hidden by default,helping to create a better experience for users. You can reveal the developer options at any time by tapping 7 times on Settings > About phone > Build number on any compatible Android device.
