Android Learning (*)--HTML source file Viewer

send a GET request

URL url = new URL (path);//Get Connection object HttpURLConnection conn = (httpurlconnection) url.openconnection ();// Set connection Properties Conn.setrequestmethod ("GET"), Conn.setconnecttimeout (Conn.setreadtimeout (5000);//Establish connection, get response if ( Conn.getresponsecode () = = 200) {}

gets the stream returned by the server and reads the HTML source from the stream Because of the build string, it can be built with new string (byte[]), and Bytearrayoutputstream can call. Tobytearray (), Ability to convert a stream directly to a byte array

Byte[] B = new Byte[1024];int len = 0; Bytearrayoutputstream BOS = new Bytearrayoutputstream (), while (len = Is.read (b))! =-1) {    //writes bytes read first to byte array output stream to save    Bos.write (b, 0, Len);} Converts the contents of the byte array output stream to a string//by default using Utf-8text = new String (Bos.tobytearray ());

Handling of garbled charactersgarbled appearance due to inconsistent server and client code table

Manually specify the code table Text = new String (Bos.tobytearray (), "utf-8");

core code

public class Mainactivity extends Activity {Handler Handler = new Handler () {public void Handlemessage (android.os.Message m SG) {TextView TV = (TextView) Findviewbyid (r.id.tv); Tv.settext ((String) msg.obj);}}; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview ( R.layout.activity_main);} public void Click (View v) {Thread t = new Thread () {@Overridepublic void run () {String path = "Http://192.168.1.103:8080/bai Du.html "; try {URL url = new URL (path);//Get Connection object, no connection is established at this time httpurlconnection conn = (httpurlconnection) url.openconnection ( ); Conn.setrequestmethod ("GET"); Conn.setreadtimeout (5000);//Establish the connection first, then get the response code if ( Conn.getresponsecode () = = 200) {//get the input stream returned by the server, the data in the stream is the source file of the HTML InputStream is = Conn.getinputstream ();// Take the text data out of the stream. String text = Utils.gettextfromstream (is);//Send message, let the main thread refresh UI, display source file message msg = Handler.obtainmessage (); Msg.obj = Text;handler.sendmessage (msg);}} catch (Exception e) {//TODO auto-generated catch BLOCKE.PRintstacktrace ();}}; T.start ();}}

Get the string from the stream

public class Utils {public static String Gettextfromstream (InputStream is) {byte[] b = new Byte[1024];int len = 0;//Create byte array output Out stream, when reading the text data of the input stream, synchronously writes the data to the array output stream bytearrayoutputstream Bos = new Bytearrayoutputstream (); try {while (len = Is.read (b))! =-1) {Bos.write (b, 0, Len);} Converts the data in the byte array output stream into a byte array, string text = new String (Bos.tobytearray ()); return text;} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();} return null;}}

Android Learning (*)--HTML source file Viewer