Translated from: Baidu. To better obtain the network connection status of the device, Android provides two classes to do this, namely connectivitymanager and networkinfo. Generally, we do not need to create them manually.
Connectivitymanager object instance. We can obtain an instance through context object context.
ConnectivityManager connManager = (ConnectivityManager)context. getSystemService(Context.
occupied. Free can also add some parameters- m and- g(respectively, MB and GB units display) print memory usage, and even support- h optionPS commandviewing system processes using the PS command
[[Email protected] ~]# PS aux
There is a ps-elf command In addition to the PS aux command, but commonly used as PS aux commandPID: Indicates the ID of the process, which is useful. In Linux, the kernel management process relies on PID to identify and manage a process, such as the need to t
correctly closes the connection that has sent the FIN), but the server still has open sockets. This may be the result of a socket not closed for an instance in all threads or processes.Note: Normally there is a socket in the TIME_WAIT status for a long period of time. The specified time is in RFC793 as the maximum lifetime (MSL) for two times ). MSL is specified as 2 minutes. Therefore, the socket may be in the TIME_WAIT
When developing Android applications, it involves network access, often requiring network state checks to provide users with the necessary reminders. It is generally possible to complete the work by Connectivitymanager.Connectivitymanager has four main tasks:1, monitor the status of mobile phone network (including Gprs
Android Development Get network status collation:1 Packagecom.gzcivil.utils;2 3 ImportAndroid.content.Context;4 ImportAndroid.net.ConnectivityManager;5 ImportAndroid.net.NetworkInfo;6 ImportAndroid.telephony.TelephonyManager;7 Importandroid.text.TextUtils;8 9 Public classNetworkutils {Ten One /**No network*/ A Public Static Final intNetworktype_invali
This problem has plagued me for a long time and finally solved it. If you get the answer here, please have dinner! "/" Indicates a server error in the application.
An error occurred while verifying the view status Mac. If this application is hosted by a network farm or cluster, make sure that the
Note:An error occurred while executing the current Web request. Check the stack trace information for details
Some applications need to connect to the network, such as updating the backend service, refreshing the data, etc., the most common practice is to regularly network, directly using online resources, cache data or perform a download task to update the data.But if the terminal is not connected to the network, or the speed is slow, there is no need to perform these t
When using a computer, we often need to check the local network connection status, to find out which program is occupied by the flow, or to see if there are some garbage plug-ins are secretly transmission information. And once an unusual connection is found, we can turn it off to restore the normal state. Below, we will demonstrate the use of rising Personal firewall V16 view the
At present, backbone switches have been widely used in various fields. So I have studied the development status of backbone switches under the three-in-one network. I would like to share with you here and hope they will be useful to you. In a backbone switch, Ethernet technology can be used to conveniently implement VLANs. The number of VLANs supported by a backbone switch is also larger than that of a comm
recently encountered a feature is based on the user's current network, users do not need to prompt the Internet, if it is WiFi can recommend some picture news, if the 3G mode is set to no Diagram mode, access to network status is relatively simple, after all, China's current traffic is still a relatively expensive state, The day the user discovers that the app co
Linux Network Programming-TCP status change
As shown in the figure above, TCP has a status of 11. data sent and received by TCP includes ACK, FIN, Syn, and RST. for a client that has not called Connect and a server that has not called listen, they are all in the closed state. ack is the response information. Any end (client or server), after receiving data
When the Android app needs to connect to the network, it does not connect to the network every time, so the program needs to detect the current device's network status in order to alert the user in a timely manner.To determine the status of the
For more information, see: http://developer.android.com/training/monitoring-device-state/connectivity-monitoring.htmlGenerally, some scheduled tasks are set during development, such as repeated alarm clocks and scheduled tasks started in the background. However, if our network is not connected, there is no need to start the tasks that need to connect to the network.We can use connectivitymanager to check whether the
/*** Network Status WiFi Mobile** @author jiangbing**/public class Networkutils {/*** Determine if the current network connection (valid connection) is not divided into WiFi mobile*/public static Boolean isconnectdeavailable (context context) {try {Connectivitymanager manager = (Connectivitymanager) context. Getsystemservice (Context.connectivity_service);if (man
1. If you only want to determine whether the current is a no-net state:if ([reachability reachabilityforlocalwifi].currentreachabilitystatus==notreachable[[reachability Reachabilityforinternetconnection] currentreachabilitystatus]==notreachable){The operation without net}else{Network-aware operation}2. Monitor network status changesImport Header File#import "Reac
*conn = [reachability reachabilityforinternetconnection];3. Determine network statusif ([WiFi currentreachabilitystatus]! = notreachable) {//WiFi availableNSLog (@ "WiFi");} else if ([conn currentreachabilitystatus]! = notreachable) {//not using WiFi, use your phone to bring your own network to the InternetNSLog (@ "Use your phone to bring your own network to th
Hide buttons in the upper-right corner of a webpage
If you do not need to share a page, you can use JavaScript code to hide the buttons in the upper-right corner of the page.
Interface call code (JavaScript)
document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {WeixinJSBridge.call('hideOptionMenu');});
Return description
No return value is returned in the bottom navigation bar. (Replace hideOptionMenu with showOptionMenu for display)
Hide the navigation bar at the bottom of
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