Hellow,
I am making a program that is capable of sending and receiving as a
server or a client. The program works but once I have an exception
(timeout because the client/server isn't initialized).
Example:
pc as server ==> on
android as client ==> connect, no problem
disable client and server
connect android client ==> timeout on socket
server ==> on
connect android client ==> same timeout message directly (without the
4500 ms delay)
I tried a lot of things but without the time out the program keeps
hanging and android asks if I want to close it or without the proper
catch exception it crashes (of course).
The code:
package muco.NetwerkServerClient;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class netwerkServerClient extends Activity {
/** Called when the activity is first created. */
/** Layout values*/
EditText edit1;
TextView text2;
Button knop1, knop2, knop3, knop4, knop5, knop6, knop7, knop8;
/** Save instance values*/
/** Client values */
Socket clientSocket = null;
BufferedReader inClient = null;
PrintWriter outClient = null;
boolean clientInitialised = false;
/** Server values */
Socket serverSocket = null;
ServerSocket server = null;
BufferedReader inServer = null;
PrintWriter outServer = null;
boolean serverInitialised = false;
/** Common network values */
int port;
int maxPort = 65535;
String ip = null;
int timeOut = 4500;
boolean ipSet = false;
boolean portSet = false;
/** Values */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.relative);
edit1 = (EditText) findViewById(R.id.edit_1);
knop1 = (Button) findViewById(R.id.knop_1);
knop1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop1(v);
}//public void onClick(View v)
});//knop1.setOnClickListener(new View.OnClickListener()
knop2 = (Button) findViewById(R.id.knop_2);
knop2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop2(v);
}//public void onClick(View v)
});//knop2.setOnClickListener(new View.OnClickListener()
knop3 = (Button) findViewById(R.id.knop_3);
knop3.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop3(v);
}//public void onClick(View v)
});//knop3.setOnClickListener(new View.OnClickListener()
knop4 = (Button) findViewById(R.id.knop_4);
knop4.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop4(v);
}//public void onClick(View v)
});//knop4.setOnClickListener(new View.OnClickListener()
knop5 = (Button) findViewById(R.id.knop_5);
knop5.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop5(v);
}//public void onClick(View v)
});//knop5.setOnClickListener(new View.OnClickListener()
knop6 = (Button) findViewById(R.id.knop_6);
knop6.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop6(v);
}//public void onClick(View v)
});//knop6.setOnClickListener(new View.OnClickListener()
knop7 = (Button) findViewById(R.id.knop_7);
knop7.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop7(v);
}//public void onClick(View v)
});//knop7.setOnClickListener(new View.OnClickListener()
knop8 = (Button) findViewById(R.id.knop_8);
knop8.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
knop8(v);
}//public void onClick(View v)
});//knop8.setOnClickListener(new View.OnClickListener()
text2 = (TextView) findViewById(R.id.text_2);
}// public void onCreate(Bundle savedInstanceState) {
@Override
public void onPause() {
super.onPause();
}//public void onPause()
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}//public void onSaveInstanceState(Bundle outState
@Override
public void onRestoreInstanceState(Bundle outState) {
super.onRestoreInstanceState(outState);
}//public void onRestoreInstanceState(Bundle outState)
@Override
public void onDestroy() {
super.onDestroy();
}//public void onDestroy()
void knop1(View v) {//inschakelen als server
text2.setText(initServer(port));
}//void knop1(View v)
void knop2(View v) {//ip
int temp = 0;
if ((edit1.getText().toString()) != null) {
ip = edit1.getText().toString();
temp = ip.length();
if(temp > 4) {
text2.setText("Doel IP-adres is ingesteld op: " + ip + " Herstart
de service");
ipSet = true;
} else {
text2.setText("IP-adres onjuist. Voer een IP-adres in, in de vorm
van xxx.xxx.xxx.xxx of gebruik de volledige netwerknaam van de
machine");
}//else
edit1.setText("");
}
}//void knop2(View v)
void knop3(View v) {//poort
text2.setText(setPort(edit1.getText().toString() ));
edit1.setText("");
}//void knop3(View v)
void knop4(View v) {//send
if(serverInitialised) {
text2.setText(setServerText(edit1.getText().toString()));
} else if(clientInitialised) {
text2.setText(setClientText(edit1.getText().toString()));
} else {
text2.setText("Schakel de server of client in");
}
edit1.setText("");
}//void knop3(View v)
void knop5(View v) {//recieve
if(serverInitialised) {
text2.setText(getServerText());
} else if (clientInitialised) {
text2.setText(getClientText());
} else {
text2.setText("Schakel de server of client in");
}
}//void knop3(View v)
void knop6(View v) {//close
if(serverInitialised) {
text2.setText(closeServer());
} else if (clientInitialised) {
text2.setText(closeClient());
} else {
text2.setText("Geen server of client geinitialiseerd");
}//else if
}
void knop7(View v) {//inschakelen als client
text2.setText(initClient(ip, port));
}
void knop8(View v) {
ip = "192.168.10.47";
port = 4444;
ipSet = true;
portSet = true;
text2.setText("IP-adres ingesteld op: " + ip + "\n poort ingesteld
op: " + port + "\n Start de server of client");
}//void knop8(View v)
void restoreUIState() {
}//restoreUIState()
String initServer(int p) {
String s = "";
if(clientInitialised) {
closeClient();
}//if
if(portSet) {
try{
server = new ServerSocket(p);
server.setSoTimeout(timeOut);
serverSocket = server.accept();
serverSocket.setSoTimeout(timeOut);
} catch (IOException e) {
s = ("I/O error: fout bij het toewijzen van de sockets");
}//try
try{
inServer = new BufferedReader(new
InputStreamReader(serverSocket.getInputStream()));
outServer = new PrintWriter(serverSocket.getOutputStream(),
true);
serverInitialised = true;
ipSet = false;
portSet = false;
s = "Server voor poort: " + p + " succesvol gestart";
} catch (IOException e) {
s = "I/O error: fout bij het verkrijgen van de in- en
outstreams";
serverInitialised = false;
} catch (Exception e) {
s = "Timeout error: fout bij het initialiseren van de in- en
outputstreams";
ipSet = false;
portSet = false;
serverInitialised = false;
}//try
} else if (!portSet) {
s = "Stel een poort in";
} else {
s = "Onbekende error bij het initialiseren van de server";
}//if else
return s;
}//initServer(int p)
String initClient(String i, int p) {
String s = null;
if (serverInitialised) {
closeServer();
}
if(ipSet && portSet) {
try{
clientSocket = new Socket(i, p);
clientSocket.setSoTimeout(timeOut);
} catch (IOException e) {
s = ("I/O error: fout bij het toewijzen van de socket");
} catch (Exception e) {
s = "Timeout error: fout bij het initialiseren van de socket";
}//try
try{
outClient = new PrintWriter(clientSocket.getOutputStream(),
true);
inClient = new BufferedReader(new
InputStreamReader(clientSocket.getInputStream()));
clientInitialised = true;
ipSet = false;
portSet = false;
s = "Client verbinding met " + i + ":" + p + " succesvol
gestart";
} catch (UnknownHostException e) {
s = ("IP-adres: " + i + ":" + p + " niet gevonden");
clientInitialised = false;
} catch (IOException e) {
s = "IO error: kan geen IO verbinding maken met de server";
clientInitialised = false;
} catch (Exception e) {
s = "Timeout error: fout bij het initialiseren de in- en
outputstreams";
ipSet = false;
portSet = false;
clientInitialised = false;
}//try
}else if (!(ipSet && portSet)) {
s = "Stel het IP-adres en de poort in";
}else if((!ipSet) && portSet) {
s = "Stel het IP-adres in)";
}else if((!portSet) && ipSet) {
s = "Stel een poort in";
} else {
s = "Onbekende error bij het initialiseren van de client";
}//if else
return s;
}//void initClient(String i, int p)
String closeServer() {
String temp = "Server succesvol afgesloten";
outServer.close();
try {
inServer.close();
serverSocket.close();
server.close();
} catch (IOException e) {
temp =("I/O error: fout bij het afsluiten van de sockets");
}//try
serverInitialised = false;
return temp;
}//void closeServer()
String closeClient() {
String temp = "Client succesvol afgesloten";
outClient.close();
try {
clientSocket.close();
} catch (IOException e) {
temp = ("I/O error: clientSocket kan niet worden gesloten");
}//try
try {
inClient.close();
} catch (IOException e) {
temp = ("I/O error: inClient bufferdReader kan niet worden
gesloten");
}//try
clientInitialised = false;
return temp;
}//void closeClient()
String setPort(String s) {
int temp = 0;
String q = null;
if (s.length() >= 1) {
try {
temp = Integer.parseInt(s);
if((temp > 0) && (temp < (maxPort+1))) {
port = temp;
q = ("Doel poort ingesteld op: " + port + " Herstart de
service");
portSet = true;;
} else {
q = (temp + " is geen geldige waarde. Kies een waarde tussen
1 en " + maxPort);
}//if else
} catch (NumberFormatException e) {
q = "Onjuiste poortwaarde. Voer een poortwaarde in van 1 tot
en met " + maxPort + ". Gebruik alleen 0 - 9.";
}//try
} else {
q = s + " is geen geldige poortwaarde. Voer een waarde in van 1
tot en met " + maxPort + ". Gebruik alleen 0 - 9.";
}//if else
return q;
}//void setPort(String s)
String setClientText (String s) {
String temp = null;
temp = edit1.getText().toString();
outClient.println(temp);
return (temp + " is verzonden naar: " + ip + ":" + port);
}//String setClientText (String s) {
String setServerText(String s) {
outServer.println(s);
return (s + " verzonden via poort:" + port);
}//setText(String s)
String getClientText() {
String temp = null;
try{
temp = inClient.readLine();
temp = (temp + " ontvangen van " + ip + ":" + port);
} catch (IOException e){
temp = ("IO error: Kan geen gegevens ontvangen op: " + ip + ":"
+ port);
}return temp;
}//String getClientText()
String getServerText() {
String s = null;
String recieve = null;
try{
recieve = inServer.readLine();
s = ("Ontvangen op poort " + port + ": " + recieve);
} catch (IOException e) {
s = ("I/O error: Kan geen gegevens ontvangen op poort: " +
port);
}//try
return s;
}//void getText()
}//public class NetwerkSendRecieve extends Activity
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