Creating a socket client in Android (implementing an online chat room)

Here's an example of implementing an Android as a client for a web chat room:

To build an Android client:

<p> </p><p>package Com.example.mysocketclient;</p><p>import Java.io.bufferedreader;import Java.io.bufferedwriter;import Java.io.ioexception;import Java.io.InputStreamReader; Import Java.io.outputstreamwriter;import Java.net.socket;import Java.net.unknownhostexception;import Java.util.date;</p><p>import Android.support.v7.app.actionbaractivity;import Android.support.v7.app.actionbar;import Android.support.v4.app.fragment;import Android.os.AsyncTask;import Android.os.bundle;import Android.view.layoutinflater;import Android.view.menu;import Android.view.MenuItem;import Android.view.view;import Android.view.view.onclicklistener;import Android.view.viewgroup;import Android.widget.button;import Android.widget.edittext;import Android.widget.textview;import android.widget.Toast; Import Android.os.build;</p><p>public class Mainactivity extends Actionbaractivity {</p><p>  private EditText Edit, Edit_content; private TeXtview content; private Button test, send;</p><p>  @Override  protected void OnCreate ( Bundle savedinstancestate) {  super.oncreate (savedinstancestate);   setcontentview ( R.layout.activity_main);   this.edit = (EditText) Super.findviewbyid (r.id.edit);   this.edit_ Content = (EditText) Super.findviewbyid (r.id.edit_content);   this.content = (TextView) Super.findviewbyid ( R.id.show)   this.test = (Button) Super.findviewbyid (r.id.test);   this.send = (Button) Super.findviewbyid (R.id.fasong); </p><p>  this.test.setonclicklistener (new Test ());   this.send.setonclicklistener (new Send ()); </p><p> }</p><p> private class Test implements Onclicklistener {</p><p>   @Override   public void OnClick (View arg0) { </p><p>   connect ();  }</p><p> }</p><p>  priVate class Send implements Onclicklistener {</p><p>   @Override   public void OnClick ( View arg0) {</p><p>   send ();   }</p><p> }</p><p > //----------------------------------------</p><p> socket Socket = null;  BufferedWriter writer = Null; bufferedreader reader = null;</p><p> public void Connect () {</p& gt;<p>    //thread controls Read and write   asynctask<void of current data, String, void> read = new Asynctask<void, String, void> () {</p><p>    @Override    protected void Doinbackground (void ... arg0) {    try {     socket = new socket ( MainActivity.this.edit.getText ()        .tostring (), 12345);      writer = new BufferedWriter (New OutputStreamWriter (&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSp;socket.getoutputstream ()));      reader = new BufferedReader (New InputStreamReader (        socket.getinputstream ()));      Publishprogress ("@success");     } catch (Unknownhostexception E1) {      toast.maketext (Mainactivity.this, "Unable to connect to server! ",        toast.length_short). Show ();      E1.printstacktrace ();     } catch (IOException E1) {      Toast.maketext (Mainactivity.this, "Unable to connect to server! ",        toast.length_short). Show ();      E1.printstacktrace ();     }    try {     string lineString = Null;     while ((lineString = Reader.readline ()) = null) {   & Nbsp;  publishprogress (lineString); &LT;/P&GT;&Lt;p>     }    } catch (IOException e) {      //TODO auto-generated Catch Block     e.printstacktrace ();     }    return null;   }</p><p>    @Override     protected void Onprogressupdate (String ... values) {    if (Values[0].equals ("@ Success ") {     toast.maketext (mainactivity.this," Connect to server! ", Toast.length_short). Show ();     }    </p><p>     content.append ("Others said:" +values[0]);     super.onprogressupdate (values);    }</p><p>  };</p><p>  read.execute ();</p> <p> }</p><p> public void Send () {  try {   content.append (" I said: "+edit_content.gettext (). toString () +"\ n");    writer.write (Edit_content.gettext (). toString () + "\ n");    writer.flush ();    edit_content.settext ("");   } catch (IOException e) {   //TODO Auto-generated catch Block   e.printstacktrace ();   } }</p><p>}</p ><p> </p>

Layout file:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "Android:layout_width=" Match_parent "android:layout_height=" match_parent "android:orientation=" vertical " > <tablelayout android:layout_width= "match_parent" android:layout_height= "Wrap_content" Android                oid:orientation= "Horizontal" > <TableRow> <edittext android:id= "@+id/edit" Android:layout_width= "200DP" android:layout_height= "Wrap_content" android:text= "10.0.2.2"/> <button android:id= "@+id/test" android:layout_width= "Match_pa Rent "android:layout_height=" wrap_content "android:text=" Connection test "/> </tablerow&gt    ; </TableLayout> <textview android:id= "@+id/show" android:layout_width= "Match_parent" Andro Id:layout_height= "Wrap_content"android:text=" "/> <edittext android:id=" @+id/edit_content "android:layout_width=" Match_pa Rent "android:layout_height=" wrap_content "android:hint=" Please enter the chat here "/> <button android:id=" @+id/fasong "android:layout_width=" match_parent "android:layout_height=" wrap_content "android:text=" hair Send Message "/></linearlayout>

First run the server program written on the previous section, and then run the Android client, click the Connect test below:

Run two Android virtual machines as follows:

Online Live chat is possible.

The code is as follows:

http://download.csdn.net/detail/yayun0516/8624193

http://download.csdn.net/detail/yayun0516/8624199

Creating a socket client in Android (implementing an online chat room)