Android develops a chat room Client

Package com. xgl. Chat;

Import java. Io. bufferedreader;
Import java. Io. inputstreamreader;
Import java. Io. printwriter;
Import java.net. Socket;
// Import java.net. inetaddress;

Import Android. App. activity;
Import Android. App. alertdialog;
Import Android. content. dialoginterface;
Import Android. OS. Bundle;
Import Android. util. log;
Import Android. View. view;
Import Android. View. View. onclicklistener;
Import Android. widget. Button;
Import Android. widget. edittext;

Public class chatroomactivity extends activity {
 
/** Called when the activity is first created .*/
Private final string debug_tag = "chatroomactivity ";
// Private Static final string serverip = "192.168.1.4 ";
Private Static final int SERVERPORT = 54321;
Private thread mthread = NULL;
Private socket msocket = NULL;
Private button mbutton_in = NULL;
Private button mbutton_send = NULL;
Private edittext medittext01 = NULL;
Private edittext medittext02 = NULL;
Private bufferedreader mbufferedreader = NULL;
Private printwriter mprintwriter = NULL;
Private string mstrmsg = "";
@ Override
Public void oncreate (bundle savedinstancestate ){
Super. oncreate (savedinstancestate );
Setcontentview (R. layout. Main );
Mbutton_in = (button) findviewbyid (R. Id. button_in );
Mbutton_send = (button) findviewbyid (R. Id. button_send );
Medittext01 = (edittext) findviewbyid (R. Id. edittext1 );
Medittext02 = (edittext) findviewbyid (R. Id. edittext2 );
// Login
System. Out. println ("=================== ");
Mbutton_in.setonclicklistener (New onclicklistener (){

@ Override
Public void onclick (view v ){
//

// Todo auto-generated method stub
Try {
// Inetaddress serveraddr = inetaddress. getbyname ("192.168.1.234 ");
// System. out. println (serveraddr. gethostaddress () + "============= IP =========== ");
// Connect to the server
Msocket = new socket ("192.168.1.7", 54321 );
System. Out. println ("the server is connected successfully! ");
Mbufferedreader = new bufferedreader (New inputstreamreader (msocket. getinputstream ()));
Mprintwriter = new printwriter (msocket. getoutputstream (), true );
} Catch (exception e ){
E. printstacktrace ();
Showdialog ("Logon exception:" + E. getmessage ());
System. Out. println (E. tostring () + "= ");
Log. E (debug_tag, E. tostring () + "++ ");
// Todo: handle exception
}
}
});


Mbutton_send.setonclicklistener (New onclicklistener (){

@ Override
Public void onclick (view v ){
System. Out. println ("========= 3 ================== ");
// Todo auto-generated method stub
Try {
// Obtain the information entered in the border
String STR = medittext02.gettext (). tostring () + "\ n ";
// Send it to the server
Mprintwriter. Print (STR );
Mprintwriter. Flush ();
} Catch (exception e ){
// E. printstacktrace ();
Log. E (debug_tag, E. tostring () + "--------");
}
}
});
Mthread = new thread ();
Mthread. Start ();
}/*
Private runnable mrunnable = new runnable (){
Public void run (){
While (true ){
Try {
If (mstrmsg = mbufferedreader. Readline ())! = NULL ){
// Line feed with caution
Mstrmsg + = "\ n ";
Mhandler. sendmessage (mhandler. obtainmessage ());
}
} Catch (exception e ){
// Todo: handle exception
Log. E (debug_tag, E. tostring ());
}
}
}
};
Handler mhandler = new handler (){
Public void handlemessage (Message MSG ){
Super. handlemessage (MSG );
// Refresh
Try {
Medittext01.append (mstrmsg );
} Catch (exception e ){
E. printstacktrace ();
Log. E (debug_tag, E. tostring ());
// Todo: handle exception
}
}
};*/
Public void showdialog (string MSG ){
New alertdialog. Builder (this). settitle ("prompt"). setmessage (MSG)
. Setpositivebutton ("OK", new dialoginterface. onclicklistener (){


Public void onclick (dialoginterface dialog, int which ){

// Todo auto-generated method stub

}

}). Show ();
}

}

 

 

 

 

 

 

 

 

Certificate -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

<? XML version = "1.0" encoding = "UTF-8"?>
<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: Orientation = "vertical">

<Textview
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"

Android: text = "@ string/Hello" Android: maxlines = "10"/>

<Edittext
Android: Id = "@ + ID/edittext1"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: EMS = "10"
Android: inputtype = "textpersonname" Android: linespacingextra = "12px" Android: singleline = "false">

<Requestfocus/>
</Edittext>
<Edittext
Android: Id = "@ + ID/edittext2"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: EMS = "10"
Android: inputtype = "textpersonname" Android: hint = "@ string/input"/>

<Button
Android: Id = "@ + ID/button_in"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "login"/>

<Button
Android: Id = "@ + ID/button_send"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "send"/>

</Linearlayout>

Certificate ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Do not forget to add this sentence to chatmainfest. xml.

<Uses-Permission Android: Name = "android. Permission. Internet"/>

Certificate --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

<? XML version = "1.0" encoding = "UTF-8"?>
<Resources>

<String name = "hello"> Hello world, chatroomactivity! </String>
<String name = "app_name"> chatroom </string>
<String name = "input"> what do you want to say? </String>

</Resources>