android check network connection status

The project was prepared by the author Wang Yongfei for Beginners.Android Several network connection mode, this project is suitable for beginners to learn network knowledge.Several network request methods are used in the project:(1): HttpClient way to get network data(2): Ht

It's very simple.Code. Package xxx; import Android. content. broadcastreceiver; import Android. content. Context; import Android. content. Intent; import android.net. connectivitymanager; import android.net network. Info; Public class netstatereceiver extends broadcastreceiver {@ overridepublic void onreceive (cont

. apache. HTTP. httpresponse; import Org. apache. HTTP. client. clientprotocolexception; import Org. apache. HTTP. client. httpclient; import Org. apache. HTTP. client. entity. urlencodedformentity; import Org. apache. HTTP. client. methods. httppost; import Org. apache. HTTP. conn. CLI Entconnectionrequest; import Org. apache. HTTP. conn. params. connroutepnames; import Org. apache. HTTP. impl. client. defaulthttpclient; import Org. apache. HTTP. message. basicnamevaluepair; import Org. apache.

. ConnPerRouteBean;Import org. apache. http. conn. params. ConnRouteParams;Import org. apache. http. conn. scheme. PlainSocketFactory;Import org. apache. http. conn. scheme. Scheme;Import org. apache. http. conn. scheme. SchemeRegistry;Import org. apache. http. conn. ssl. SSLSocketFactory;Import org. apache. http. impl. client. DefaultHttpClient;Import org. apache. http. impl. conn. tsccm. ThreadSafeClientConnManager;Import org. apache. http. params. BasicHttpParams;Import org. apache. http. par

When testing JSON data with Android, an exception was reported:java.net.connectexception:localhost/127.0. 0.1:8080 -Connection refusedIt turns out that the simulator defaults to localhost or 127.0.0.1 as itself.On the Internet, you can use 10.0.2.2 instead of 127.0.0.1 and localhost on the simulator.In addition, if it is in the LAN environment can be used 192.168.0.x or 192.168.1.x (depending on the configu

Mainactivity as follows:Package Cc.testnetworkchange;import Android.os.bundle;import android.app.activity;/** * Demo Description: * Change of network connection using broadcast monitoring device * It is also possible to monitor if the device has been disconnected from the network */public class Mainactivity extends Activity {@Overrideprotected void OnCreate (Bund

Access the ctwap, cmwap, uniwap, and other network settings Proxy: Obtain host and port: android.net. proxy. getdefaulthost (), android.net. proxy. getdefaultport (); android.net. proxy. if getdefaulthost () is not empty, the connected network is WAP. In this case, it is best to set a proxy. The settings are as follows: 1) In the java.net package: httpurlconnection, which sets the proxy Code as follows:

First, you mustGet the corresponding permissions in the middle of manifest. xml Public class httpexampleactivity extends activity {Private Static final string debug_tag = "httpexample"; private edittext urltext; private textview; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); urltext = (edittext) findviewbyid (R. id. myurl); textview = (textview) findviewbyid (R. id. mytext);} // when user CLI CKS but

This project uses httpclient to connect the client to the server over the network. I will summarize the network of the client sending requests. For example. Note: 1. Various requests here represent logon requests, task requests, and other URLs. We can see that the most important part of the entire network is the serverutil and httputil.CodeAs

Private String Connect () {String URI = Etwebaddress.gettext (). toString (); StringBuilder SB =new StringBuilder (); BufferedReader in = null; if ("". Equals (URI)) {Toast.maketext (this, "Empaty address", Toast.length_long). Show (); }else{HttpPost postrequest = new HttpPost (URI); arraylistAndroid uses post for network connection

)); ConnManagerParams.setMaxTotalConnections(httpParams, DEFAULT_MAX_CONNECTIONS); HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1); HttpProtocolParams.setContentCharset(httpParams, "UTF-8"); HttpConnectionParams.setStaleCheckingEnabled(httpParams, false); HttpClientParams.setRedirecting(httpParams, false); HttpProtocolParams.setUserAgent(httpParams, "Android client"); HttpConnectionParam