SystemClock类

参考

https://www.jianshu.com/p/9fe32f28f6a1

public final class SystemClock {
    
    public static void sleep(long ms){}
    
    public static boolean setCurrentTimeMillis(long millis) {}
    
    native public static long uptimeMillis()
    
    native public static long elapsedRealtime()
    
    public static @NonNull Clock elapsedRealtimeClock(){}
    
    public static native long elapsedRealtimeNanos(){}
    
    public static native long currentThreadTimeMillis(){}
    
    public static native long currentThreadTimeMicro(){}
    
    public static native long currentTimeMicro(){}
    
    public static long currentNetworkTimeMillis(){}
    
    public static @NonNull Clock currentNetworkTimeClock(){}
}