Android判断当前网络能否上网

  /**
     * 判断当前网络是否可用(6.0以上版本)
     * 实时
     * @param context
     * @return
     */
    public static boolean isNetSystemUsable(Context context) {
        boolean isNetUsable = false;
        ConnectivityManager manager = (ConnectivityManager)
                context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
            NetworkCapabilities networkCapabilities =
                    manager.getNetworkCapabilities(manager.getActiveNetwork());
            if (networkCapabilities != null) {
                isNetUsable = networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
            }
        }
        return isNetUsable;
    }