Android Simple chat room instance based on socket client

In this article we share a simple chat room instance source under Android based on socket client

Establish 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> sockets socket = NULL;
BufferedWriter writer = null;
BufferedReader reader = null;</p><p> public void connect () {</p><p>
Thread controls reading and writing of current data
Asynctask<void, 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 (
Socket.getoutputstream ()));
reader = new BufferedReader (New InputStreamReader (
Socket.getinputstream ()));
Publishprogress ("@success");
catch (Unknownhostexception E1) {
Toast.maketext (Mainactivity.this, "Unable to connect to the server!") ",
Toast.length_short). Show ();
E1.printstacktrace ();
catch (IOException E1) {
Toast.maketext (Mainactivity.this, "Unable to connect to the server!") ",
Toast.length_short). Show ();
E1.printstacktrace ();
}
try {
String lineString = null;
while ((lineString = Reader.readline ())!= null) {
Publishprogress (lineString);</p><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 the server!") ", Toast.length_short). Show ();
}
</p><p> Content.append ("Others say:" +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: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_parent"
android:layout_height= "Wrap_content"
android:text= "Connection test"/>
</TableRow>
</TableLayout>

<textview
Android:id= "@+id/show"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content"
android:text= ""/>

<edittext
Android:id= "@+id/edit_content"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content"
Android:hint= "Please enter the chat content here"/>

<button
Android:id= "@+id/fasong"
Android:layout_width= "Match_parent"
android:layout_height= "Wrap_content"
android:text= "Send Message"/>

</LinearLayout>

First run the server program written in the previous section, then run the Android client, click on the connection test as follows:

Run two Android virtual machines as follows:

Online real-time chat can be realized.