Sometimes doing Android development requires a network to connect to the server. Assume that there is no network to prompt. The code is very easy and the code is as follows:public static Boolean isnetworkavailable (context context) {Connectivitymanager mgr = (connectivitymanager) Context.getsystemservice (Context.connectivity_service); Networkinfo[] info = mgr.getallnetworkinfo (); if (info! = null) {for (i
Android determines the network status. In the Android operating system, how can we correctly determine whether the network we connect is disconnected? Today, we will make a detailed analysis on this application technique.
publicclassConnectionChangeReceiverextendsBroadcastReceiver
{
@Override
publicvoidonReceive(Contextcontext,Intentintent)
{
Conne
The following sectionCodeReturns the network connection status of the current computer.
[Dllimport (" Wininet. dll ")] Private Static Extern Bool Internetgetconnectedstate ( Ref Uint Connected, Uint Reserved ); Static Uint Uconnection = 0x20; /// /// Returns true if it have detected an active Internet connection. /// Public Static Bool Hasinternetconnection{ Get { Return Internetgetconne
I. Using LINQ to find difference sets, intersectionsUsage scenarios:Need to obtain user data from the data center, and with this as the standard, synchronize the user information of the system, delete the redundant users in the system, the missing users to add operations, update the information users to edit the operation updates.Therefore, we need to compare the data center and the existing user information in the system into three parts:(1) LINQ collection, find the user data that needs to be
) { Connectivitymanager Mconnectivitymanager = (connectivitymanager) context. Getsystemservice (Conte Xt. Connectivity_service); Networkinfo mmobilenetworkinfo = Mconnectivitymanager. Getnetworkinfo (Connectivitymanager.type_mobile); if (mmobilenetworkinfo! = null) {return mmobilenetworkinfo.isavailable (); }} return false; }//Gets the type information of the current network connection public static int
Article title: view the network connection status commands in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
View http process count
[Root @ localhost conf] # ps-ef | grep httpd | wc-l
333
Count the connection count Statu
the record shown above, NF equals 6$nf represents a field value, such as the record shown above, $NF that is6That represents the value of the 6th field, time_waitstate[$NF] The number of connections that represent the value of the array element, as shown above, the state[time_wait] state++state[$NF] means adding a number to a record, as shown above, is the number of connections to the state[time_wait] state and an end represents the command to be executed in the final stage for(KeyinchState ) t
We can use Window.online to detect the current network condition of the user and return a Boolean valueWindow.addeventlistener ("Online", function () { alert ("Network connection already established") }) Window.addeventlistener ("Offline", function () { alert ("Network connection already Lost") })Note: If you are already online before the pag
1. Check network connectivity through timed sending and receiving email
Copy codeThe Code is as follows: #/bin/bash
Echo "Daily test mail"> state.txt
Mail-s Server_State abc@jbxue.com Rm-df./state.txt
~Crontab-eAdd the following task10 07 ***/root/checkNKmail Time-sharing day-month week
2. timed detection of network status sent by email
Checkserverstat script con
:8.8.8.8″http://www.miotour.com-v-I.Curl feedback time, such as connection time, download time and other informationCurl-w%{time_connect}:%{time_starttransfer}:%{time_total}-s-o/dev/nullSave a file to your hard disk, named file.htmlCurl-o file.html http://www.miotour.com/index.htmlDownload index.html file,-O is uppercase letterCurl-o http://www.miotour.com/index.htmlCurl submits user name and passwordCurl Http://name:[email protected]Curl-u name:passwd http://www.miotour.com-B "Cookie" This para
When the number of TCP connections is very large, the current internal IP, the connection of the external IP is counted[[emailprotected]account_tcp]#cataccount_tcp.sh#!/bin/bash# Statistics the current network connection situation Netstat -na|awk '/^tcp/{s[$6]++}end{for (keyins) Printkey,s[key]} ' > /root/account_tcp/state.txt# statistics localaddress TCP connection number netstat-na|awk '/^tcp/' |awk-vfs= "[:]+" ' {print$4} ' |sort|uniq-c |sort-n>/r
Catalogue [-]
First, the judgment equipment
Second, determine the network connection status
Third, the device does not show the solution
First, the judgment equipment
01
//设备名称
02
return[UIDevice currentDevice].name;
03
04
//设备型号,只可得到是何设备,无法得到是第几代设备
.401 Unauthorized The current request requires user authentication .403 Forbidden The server has understood the request, but refuses to execute it. Unlike the 401 response, authentication does not provide any help, and the request should not be repeated.404 Not Found The request failed and the requested resource was not found on the server. 404 This status code is widely used when the server does not want to reveal exactly why the request was reject
The API that is used in iOS to query the network information for the current connection is CncopycurrentnetworkinfoThis API is located inside the systemconfiguration.framework and needs to be increased when used. h and Include library filesCan be directly included when using#import The code is as follows:+ (NSString *) getwifiname{NSString *wifiname = nil;Cfarrayref wifiinterfaces = Cncopysupportedinterfaces ();if (!wifiinterfaces) {return nil;}Nsarra
Sometimes do Android development need to use the network to connect to the server, if there is no network to prompt. The code is simple and the code is as follows:public static Boolean isnetworkavailable (context context) {Connectivitymanager mgr = (connectivitymanager) Context.getsystemservice (Context.connectivity_service); Networkinfo[] info = mgr.getallnetworkinfo (); if (info! = null) {for (int i = 0;
The magic problem is that after ThinkPad e0000c recovers from the STANDBY state, the wireless network is no longer available. In Windows 7, you can press FN + F8 or F7 to adjust the screen brightness,F9 + FN does not respond either. If the driver is uninstalled and re-installed, the Windows diagnostic system prompts that the wireless function is disabled. There is no way to do it. You can search for a person who can access the internet. The result i
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