Android gets network resources via URL

1. First register for access to Internet services in Androidmanifest.xml:

<uses-permission android:name="android.permission.INTERNET"

(if not joined, there will be permission denied exception)

2. The code is as follows:

Package Vip.test.httpget;import java.io.bufferedinputstream;import java.io.inputstream;import Java.net.URL; Import Java.net.urlconnection;import Org.apache.http.util.bytearraybuffer;import Org.apache.http.util.encodingutils;import Vip.test.httpget.r;import Android.app.activity;import Android.os.Bundle ; Import Android.widget.TextView; Public classHttpGet extends Activity {/** Called when the activity is first created.*/@Override Public voidonCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.main); TextView TV=NewTextView ( This); String myString=NULL; Try {            //defines the URL that gets the contents of the fileURL Myurl =NewURL ("HTTP://www.baidu.com/hello.txt&quot"); //Open URL linkURLConnection Ucon =myurl.openconnection (); //use InputStream to read data from URLConnectionInputStream is=Ucon.getinputstream (); Bufferedinputstream bis=NewBufferedinputstream ( is); //Cache with BytearraybufferBytearraybuffer BAF =NewBytearraybuffer ( -); intCurrent =0;  while(current = Bis.read ())! =-1) {baf.append (byte) (current); }            //Converts the cached content to a string, encoded with UTF-8myString = encodingutils.getstring (Baf.tobytearray (),"UTF-8"); } Catch(Exception e) {myString=E.getmessage (); }        //Set screen displayTv.settext (myString);  This. Setcontentview (TV); }}

3. Code Explanation:

1) Instance URL class: Myurl, which represents the URL to get content for:

URL myurl=new URL (HTTP://

2) An instance of the URLConnection class that represents an open network connection Ucon:

3) The data that is read from the network is expressed in the form of a byte stream:

is =ucon.getinputstream ();    is =ucon.getinputstream (); Bufferedinputstream bis=new bufferedinputstream ( is

4) Read the data in the network by reading the method:

Bytearraybuffer baf=New bytearraybuffer (a); int current=0;  while ((Current=bis.read ())!=-1) {baf.append ((byte

5) Since the read data is only a byte stream and cannot be displayed directly on the screen, the byte stream must be converted to a readable string before the display:

Mystring=encodingutils.getstring (Baf.tobytearray ()," utf-8

(If you read a. txt file that is in UTF-8 format, you need to convert the data specifically)

Android gets network resources via URL