Android Socket Server

The first is to ensure that the server is connected to the client, Ping does not connect.

TCP Server-side code

Package Com.example.tcp_server;import Java.io.datainputstream;import java.io.ioexception;import Java.io.printwriter;import Java.net.serversocket;import Java.net.socket;import Java.util.ArrayList;import Java.util.list;import Java.util.concurrent.executorservice;import Java.util.concurrent.executors;import Android.annotation.suppresslint;import Android.os.handler;import Android.os.message;import Android.os.StrictMode; Import Android.util.Log; @SuppressLint ("Newapi") Public classTcpservice implements runnable{//Server Port    Private StaticFinalintServerPort =2001; //Store all client socket connection Objects    Private StaticList<socket> mclientlist =NewArraylist<socket>(); //thread Pool    PrivateExecutorservice Mexecutorservice; //ServerSocket Object    PrivateServerSocket Mserversocket; Private StaticPrintWriter Mprintwriter; Private StaticString mstrmsg;  PublicTcpservice () {Try{strictmode.setthreadpolicy (NewStrictMode.ThreadPolicy.Builder (). Detectdiskreads (). Detectdiskwrites (). Detectnetwork (). Penaltylog (). Build (            )); Strictmode.setvmpolicy (NewStrictMode.VmPolicy.Builder (). Detectleakedsqlliteobjects (). Detectleakedclosableobjects (). Penaltylog ().            Penaltydeath (). build ()); //setting up server portsMserversocket =NewServerSocket (ServerPort); //Create a pool of threadsMexecutorservice =Executors.newcachedthreadpool (); LOG.E ("Tcpservice","start ..."); //the socket object used to temporarily save the client connection            NewThread (Tcpservice. This). Start (); }        Catch(IOException e) {LOG.E ("Tcpservice", e.tostring ());        E.printstacktrace (); }    }    //receive line Cheng send over information and display it with TextView     Public StaticHandler Mhandler =NewHandler () { Public voidhandlemessage (Message msg) {super.handlemessage (msg); LOG.E ("server says:", mstrmsg); Mainactivity.appendtext ("server says:"+mstrmsg);     }    }; //Each client opens a single thread    Static classThreadserver implements Runnable {PrivateSocket Msocket; PrivateDataInputStream Dinput;  Publicthreadserver (socket socket) throws IOException { This. Msocket =socket; Dinput=NewDataInputStream (Socket.getinputstream ()); Sendtoclient ("hello,tcp Server ..."); }         Public voidrun () {Try            {                byte[] Bbuf =New byte[10000];  while(true) {                                        if(!msocket.isclosed ()) {                        if(msocket.isconnected ()) {if(!Msocket.isinputshutdown ()) {                                intLength =Dinput.read (BBUF); Mstrmsg=NewString (Bbuf,0, Length,"gb2312"); Mstrmsg+="\ n";                            Mhandler.sendmessage (Mhandler.obtainmessage ()); }                        }                    }                }            }            Catch(IOException e) {e.printstacktrace (); }        }    }     Public Static  voidsendtoclient (String msg) {Try{             for(Socket client:mclientlist) {mprintwriter=NewPrintWriter (Client.getoutputstream (),true);            MPRINTWRITER.PRINTLN (msg); }        }        Catch(Exception e) {LOG.E ("sending a message to the client failed", e.tostring ()); }    }     Public voidrun () {Try{Socket Client=NULL;  while(true) {LOG.E ("Tcpservice","Receiving customer Connections"); //receive client connections and add to listClient =mserversocket.accept ();                Mclientlist.add (client); //open a client threadMexecutorservice.execute (Newthreadserver (client)); }        }        Catch(Exception e) {LOG.E ("Listening Client", e.tostring ()); }    }}

Tcpservice

Front

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"Android:layout_width="fill_parent"Android:layout_height="fill_parent"android:orientation="Vertical"> <EditText Android:id="@+id/myinternet_tcpclient_edittext01"Android:layout_width="fill_parent"Android:layout_height="200px"Android:text="Chat history: \ n"> </EditText> <EditText Android:id="@+id/myinternet_tcpclient_edittext02"Android:layout_width="fill_parent"Android:layout_height="wrap_content"Android:text="Enter the content you want to send"> </EditText> <LinearLayout android:layout_width="fill_parent"Android:layout_height="wrap_content"android:orientation="Horizontal"android:gravity="Center"> <Button Android:id="@+id/myinternet_tcpclient_btnsend"Android:layout_width="400px"Android:layout_height="wrap_content"Android:text="Send"/> </LinearLayout> </LinearLayout>

Background

Package Com.example.tcp_server;import android.os.bundle;import android.app.activity;import android.util.Log; Import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.EditText; Public classMainactivity extends Activity {//declaring Objects    PrivateButton Msendbutton; Private StaticEditText mEditText01; Private StaticEditText mEditText02; Private StaticString TAG ="shit="; @Overrideprotected voidonCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main); //Start the server        NewTcpservice (); Msendbutton=(Button) Findviewbyid (r.id.myinternet_tcpclient_btnsend); mEditText01=(EditText) Findviewbyid (r.id.myinternet_tcpclient_edittext01); mEditText02=(EditText) Findviewbyid (r.id.myinternet_tcpclient_edittext02); //send a button to register an eventMsendbutton.setonclicklistener (NewOnclicklistener () { Public voidOnClick (View v) {Try                {                    //Get what we entered in the edit boxString str = Medittext02.gettext (). toString () +"\ n"; Medittext01.append ("I said:"+str); //sending messages to clientsTcpservice.                                    Sendtoclient (str); } Catch(Exception e) {log.e (TAG, e.tostring ());    }            }        }); }     Public Static voidAppendText (String msg) {medittext01.append (msg); }}

mainactivity

Android Socket Server