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Effect:

Analysis:

1. Need permission to connect network

<uses-permission android:name= "Android.permission.INTERNET"/>

2, to the default protocol and default port HTTP and 80 write on

3, put the network access code in the Asynctask inside

4. Two methods of getting content type

String Contenttype=conn.getheaderfield ("Content-type");

Conn.getcontenttype

5. Split function

String encoding=contenttype.split ("=") [0];

Divide by equal sign, take the NO. 0 paragraph

Code:

1  PackageFry;2 3 ImportJava.io.InputStreamReader;4 Importjava.net.HttpURLConnection;5 Importjava.net.MalformedURLException;6 ImportJava.net.URL;7 8 ImportCOM.EXAMPLE.WATCHCODE.R;9 Ten Importandroid.app.Activity; One ImportAndroid.os.AsyncTask; A ImportAndroid.os.Bundle; - ImportAndroid.util.Log; - ImportAndroid.view.View; the ImportAndroid.widget.Button; - ImportAndroid.widget.EditText; -  -  Public classActivity01extendsactivity{ +     PrivateButton btn_checked; -     PrivateEditText Et_website; +     PrivateEditText et_content; A @Override at     protected voidonCreate (Bundle savedinstancestate) { -         //TODO auto-generated Method Stub -         Super. OnCreate (savedinstancestate); - Setcontentview (R.LAYOUT.ACTIVITY01); -          -Btn_checked=(Button) Findviewbyid (r.id.btn_checked); inEt_website=(EditText) Findviewbyid (r.id.et_website); -Et_content=(EditText) Findviewbyid (r.id.et_content); to          +     } -      the      *      Public voidOnClick (view view) { $         //gets the URL entered by the edit boxPanax NotoginsengString urlstr=Et_website.gettext (). toString (); -         NewAsynctask<string,void,string>(){ the              + @Override A             protectedstring Doinbackground (String ... arg0) { the                 //string Buffers +StringBuffer buffer=NewStringBuffer (); -                 Try { $String s=arg0[0]+ ": 80"; $                     //encapsulates a URL object -URL url=NewURL (s); -                     //Get HTTP Connection object theHttpURLConnection conn =(HttpURLConnection) url.openconnection (); -Conn.setrequestmethod ("GET");WuyiConn.setconnecttimeout (5000); the                     //Get Status Code -                     intCode=Conn.getresponsecode (); WuLOG.D ("Fry", "Get to Status code:" +code); -                     if(code==200) {//Request succeeded AboutString Contenttype=conn.getheaderfield ("Content-type"); $String encoding=contenttype.split ("=") [0]; -LOG.D ("Fry", encoding); -                         //get the entity contents of a response message -InputStreamReader reader=NewInputStreamReader (Conn.getinputstream (), "UTF-8"); A                         Char[] chararr=New Char[1024*8]; +                         intLen=0; the                          while((Len=reader.read (Chararr))!=-1){ -                             //character array to string $String str=NewString (chararr,0, Len); the                             //append a string at the end the buffer.append (str); the                         } the                     } -                      in}Catch(Exception e) { the e.printstacktrace (); the                 } About                  the                 returnbuffer.tostring (); the             } the             protected voidOnPostExecute (String result) { +                 //set string to edit box - Et_content.settext (result); the                 Bayi             }; the              the}.execute ("http//" +urlstr); -     } -      the}

Originally Getresponsecode did connect, get status code, return status code three things.

Now Conn.connect () has made the connection to this matter.

5000ms throws an exception without a successful connection

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