I am debugging my app on my Galaxy S3 and whenever I monitor the processing .. I notice very high load the app processing . Application processing goes to 80 % sometimes which is incredibly hight
Here is the code:
package com.example.socketclient;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.util.Log;
public class SocketCode extends Activity {
private boolean connected = false;
//private Handler handler = new Handler();
public TextView txt;
int doit=0;
protected SocketCore Conn;
public Button b;
public EditText TextToSend;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_socket_code);
b = (Button)findViewById(R.id.button1);
txt = (TextView)findViewById(R.id.textView1);
TextToSend = (EditText)findViewById(R.id.editText1);
//Conn = new SocketCore(this,txt);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Log.e("ErrorButton","Button Pressed Before Toggle"+doit);
doit=1;
Log.e("ErrorButton","Button Pressed "+doit);
}
});
Thread cThread = new Thread(new ClientThread());
cThread.start();
}
public class ClientThread implements Runnable {
Socket socket ;
String finall="",text;
PrintWriter out = null;
BufferedReader in = null;
public void run() {
try {
InetAddress serverAddr = InetAddress.getByName("192.168.0.150");
Log.d("ClientActivity", "C: Connecting...");
socket= new Socket(serverAddr,4444);
connected = true;
while (connected) {
try {
if(doit==1)
{
Log.e("ErrorButton","If");
out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out.println(TextToSend.getText().toString());
finall="";
while ((text = in.readLine()) != null) {
finall += text;
Log.e("Test","Final: "+finall);
if(text=="quit")
{
socket.close();
}
Log.e("ClientActivity", "After Read "+doit+" "+finall);
break;
}
doit=0;
Log.e("ClientActivity", "Out Of IF "+doit);
runOnUiThread(new Runnable() {
public void run() {
txt.setText(finall);
}
});
}
} catch (Exception e) {
Log.e("ClientActivity", "S: Error", e);
}
}
socket.close();
txt.setText("Closed Socket");
Log.d("ClientActivity", "C: Closed.");
} catch (Exception e) {
Log.e("ClientActivity", "C: Error", e);
connected = false;
}
}
public void ClientHandler(String Send)
{
try{
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket
.getOutputStream())), true);
out.println(Send);
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
finall = in.readLine();
txt.setText(finall);
}
catch(IOException e)
{txt.setText("Exception");}
}
}
}
The CPU is doing that because you're running a non-stop loop that keeps feeding runnables into the UI thread, so the CPU keeps under very high load. Instead, I'd recommend that you consider using a push strategy instead of a polling strategy with something like GCM (Google Cloud Messaging), where your app wakes up when your server pushes new data onto the device. If that's not a possible solution, I'd throttle the polling rate to a lower rate and limit it to a few times per minute (or less), using Thread.sleep() periodically in run() to avoid flooding the UI thread with runnables.
Fixed
With using Thread.Sleep(200);
while (connected) {
try {
Thread.sleep(200);
Log.e("ErrorButton","If");
if(doit==1)
{
Related
I am trying to send a string from an android device to the server using the code following:
package com.example.androidsocketserver;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends Activity {
private Socket socket;
private static final int SERVERPORT = 6000;
private static final String SERVER_IP = "10.50.27.10";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Thread(new ClientThread()).start();
}
public void onClick(View view) {
try {
EditText et = (EditText) findViewById(R.id.EditText01);
String str = et.getText().toString();
PrintWriter out = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(socket.getOutputStream())),
true);
out.println(str);
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
class ClientThread implements Runnable {
#Override
public void run() {
try {
InetAddress serverAddr = InetAddress.getByName(SERVER_IP);
socket = new Socket(serverAddr, SERVERPORT);
} catch (UnknownHostException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
But it is sending the string only on first click. In second time it is unable to send the content. What I need to do?
But it is sending the string only on first click. In second time it is
unable to send the content. What I need to do?
Put new Thread(new ClientThread()).start(); in a separate method say:
startThread(){
new Thread(new ClientThread()).start();
}
and then call this method in onClick
I have a working messaging app that sends messages from the client to the server.
I want the client to CONSTANTLY listen for messages from the server.
I want the client to only send packets to the server when "Start" is called, but the problem is that I have to press it twice for the message to actually deliver to the server (Idk why)
Later on I'll change the program to something that always delivers messages to the server (his GPS location), so I would also like some tips about how to make a loop in an Android app.
//Client
package com.example.clienttest;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
Thread m_objThreadClient;
Socket clientSocket;
TextView serverMessage;
EditText clientMessage;
String sIn, sOut;
BufferedReader brOut, brIn;
DataOutputStream oos;
DataInputStream ois;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
serverMessage = (TextView) findViewById(R.id.textView1);
clientMessage = (EditText) findViewById(R.id.editText1);
m_objThreadClient = new Thread( new Runnable(){
public void run()
{
try {
clientSocket = new Socket("192.168.1.102", 4000);
oos = new DataOutputStream (clientSocket.getOutputStream());
ois = new DataInputStream (clientSocket.getInputStream());
brIn = new BufferedReader (new InputStreamReader(ois));
} catch (IOException e) {
serverMessage.setText(e.getMessage());
}
}
});
m_objThreadClient.start();
}
public void Listener(){
try {
while ((sIn = brIn.readLine()) != null){
sIn = brIn.readLine();
}
serverMessage.setText(sIn);
} catch (IOException e) {
serverMessage.setText(e.getMessage());
}
}
public void Start(View view) {
sOut = clientMessage.getText().toString();
try {
oos.writeUTF(sOut);
oos.flush();
oos.flush();
} catch (IOException e) {
serverMessage.setText(e.getMessage());
}
}
public void onStop(){
try {
oos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//Server
import java.net.ServerSocket;
import java.net.Socket;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import java.util.Hashtable;
public class Server2 {
#SuppressWarnings("resource")
public static void main (String[] args) throws IOException {
ServerSocket server = null;
try {
server = new ServerSocket(4000);
} catch (IOException e) {
System.err.println("Could not start up on: " + "4000" + "Maby server is already open? Or a portforwording messup?");
System.err.println(e);
System.exit(1);
}
Socket client = null;
while(true) {
try {
client = server.accept();
System.out.print("Connected ");
} catch (IOException e) {
System.err.println("Accept failed.");
System.err.println(e);
}
Thread t = new Thread(new ClientConn(client));
t.start();
}
}
}
class ClientConn implements Runnable {
private Socket client;
String Recv;
DataInputStream inFromClient;
DataOutputStream outToClient;
ClientConn(Socket client) {
this.client = client;
try {
inFromClient = new DataInputStream(client.getInputStream());
outToClient = new DataOutputStream(client.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
public void run() {
String response;
try {
while ((response = inFromClient.readUTF()) != null) {
Recv = inFromClient.readUTF();
System.out.print("Msg: " + Recv + " \n");
if( Recv.equals("Hi")){
outToClient.writeUTF("Wa alaikum");
outToClient.flush();
}
else{
outToClient.writeUTF("..what?");
outToClient.flush();
}
}
} catch (IOException e) {
System.out.print("No input ");
System.err.println(e);
}
}
}
I want to connect to my server building in Android, but I can't, I don't know how to connect it. I think my code is fine. I changed Manifest with Permission INTERNET.
package com.android.server;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener{
/** Called when the activity is first created. */
private static String TAG = "ServerSocketTest";
EditText edittext1;
private ServerSocket server;
Runnable conn = new Runnable() {
public void run() {
try {
edittext1.setText("Esperando0");
server = new ServerSocket(9999);
edittext1.setText("Esperando1");
while (true) {
edittext1.setText("Esperando2");
Socket socket = server.accept();
if(socket.isConnected() == true){
edittext1.setText("socket is connected: " + socket.getRemoteSocketAddress().toString());
}
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String str = in.readLine();
Toast.makeText(getApplicationContext(), "BufferedReader ready", Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();
Log.i("received response from server", str);
edittext1.setText("Conectado");
PrintWriter salida = new PrintWriter(new OutputStreamWriter( socket.getOutputStream() ),true );
salida.println("Conexion establecida");
in.close();
socket.close();
}
} catch (IOException e) {
Log.e(TAG, e.getMessage());
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
};
#SuppressLint({ "NewApi", "NewApi", "NewApi", "NewApi" })
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
edittext1 = (EditText)findViewById(R.id.editText1);
Button boton1 = (Button)findViewById(R.id.button1);
boton1.setOnClickListener(this);
new Thread(conn).start();
}
#Override
protected void onPause() {
super.onPause();
if (server != null) {
try {
server.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void onClick(View v) {
}
}
My client, it work very well.:
package com.clientesocketandroid;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class ClienteSocketAndroid extends Activity implements OnClickListener{
String IP,mensaje, MensajeEntrada;
int Port;
Socket socket;
ServerSocket SSocket;
PrintWriter out;
Button boton1, boton2,boton3;
EditText edittext1,edittext2,edittext3,edittext4;
TextView textview5;
String mClientMsg = "";
Thread myCommsThread = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cliente_socket_android);
boton1 = (Button)findViewById(R.id.button1);
boton1.setOnClickListener(this);
boton2 = (Button)findViewById(R.id.button2);
boton2.setOnClickListener(this);
boton3 = (Button)findViewById(R.id.button3);
boton3.setOnClickListener(this);
edittext1 = (EditText)findViewById(R.id.editText1);
edittext2 = (EditText)findViewById(R.id.editText2);
edittext3 = (EditText)findViewById(R.id.editText3);
edittext4 = (EditText)findViewById(R.id.editText4);
Port = Integer.parseInt(edittext3.getText().toString());
try {
SSocket = new ServerSocket(Port);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
socket = SSocket.accept();
Toast.makeText(getApplicationContext(), "Listo", Toast.LENGTH_SHORT).show();
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
MensajeEntrada = in.readLine();
edittext4.setText(MensajeEntrada);
} catch (Exception e) {
e.printStackTrace();
}
}
#SuppressLint({ "NewApi", "NewApi", "NewApi" })
public void onClick(View arg0) {
if(arg0.getId() == R.id.button1){
try {
IP = edittext2.getText().toString();
Port = Integer.parseInt(edittext3.getText().toString());
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
socket = new Socket(IP, Port); //Abre un socket con el número de IP y de puerto.
if(socket.isConnected() == true){
Toast.makeText(getApplicationContext(), "Conectado", Toast.LENGTH_SHORT).show();
}
} catch (UnknownHostException e) {
e.printStackTrace();
edittext1.setText(e.getMessage() + ": " + e.getCause());
} catch (IOException e) {
e.printStackTrace();
edittext1.setText(e.getMessage() + ": " + e.getCause());
}
}
if(arg0.getId() == R.id.button3){
try {
mensaje = edittext1.getText().toString();
PrintWriter salida = new PrintWriter(new OutputStreamWriter( socket.getOutputStream() ),true );
salida.println(mensaje);
edittext1.setText("");
//hace falta concatenacion
edittext4.setText("" + "\n" + mensaje + "");
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Mensaje NO enviado", Toast.LENGTH_SHORT).show();
}
}
if(arg0.getId() == R.id.button2){
try {
PrintWriter salida = new PrintWriter(new OutputStreamWriter( socket.getOutputStream() ),true );
salida.println("bye");
Toast.makeText(getApplicationContext(), "Conexión cerrada", Toast.LENGTH_SHORT).show();
socket.close();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Error al cerrar sesion", Toast.LENGTH_SHORT).show();
}
}
}
}
I thank your Help!!
The algorithm shows that whenever your socket is connected or not, you always create a buffered i/O stream and sending the data
The following is my suggested pseudo code for server
try(socket successfully connected) {
try( server is synchronized with the client) socket.accept();
// create the Object I/O stream
} show error
for Client
//Create a new socket with IP address and port number
try
client connect to server with aforementioned parameters with timeout
create a Object I/O stream
catch (IOException)
One problem that I see with your code is, you cannot update Ui elements from Non Ui thread, that is why it is raising exception, but you have caught all the exceptions.
So remove all setText calls from the runnable.
edittext1.setText("Conectado");
Use runonUithread or any other methods to update UI elements, and do not catch all exceptions like you have done. It is quite difficult to debug.
I have problem with android sockets , I have two android applications Server and ServerClient , in ServerClient It gives nullPointerException on second row written below
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
I checked serverAddr is 10.0.2.2 , but then I saw that socket is null. Can anybody helps with it?
EDIT: with this serverAddress I saw that it is unreachable, maybe I must make it reachable manual ?
here is sources
*ServerClient*
package com.example.serverclient;
import android.os.Bundle;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.util.Log;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.view.View;
import android.view.Menu;
public class MainActivity extends Activity {
private Button bt;
private TextView tv;
private Socket socket;
private String serverIpAddress = "10.0.2.2";
private static final int REDIRECTED_SERVERPORT = 5000;
// AND THAT'S MY DEV'T MACHINE WHERE PACKETS TO
// PORT 5000 GET REDIRECTED TO THE SERVER EMULATOR'S
// PORT 6000
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt = (Button) findViewById(R.id.myButton);
tv = (TextView) findViewById(R.id.myTextView);
try {
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
} catch (UnknownHostException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
bt.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
EditText et = (EditText) findViewById(R.id.EditText01);
String str = et.getText().toString();
OutputStream sk = socket.getOutputStream();
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
out.println(str);
Log.d("Client", "Client sent message");
} catch (UnknownHostException e) {
tv.setText("Error1");
e.printStackTrace();
} catch (IOException e) {
tv.setText("Error2");
e.printStackTrace();
} catch (Exception e) {
tv.setText("Error3");
e.printStackTrace();
}
}
});
}
}
**Server**
package com.example.myserver;
import android.os.Bundle;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
ServerSocket ss = null;
String mClientMsg = "";
Thread myCommsThread = null;
protected static final int MSG_ID = 0x1337;
public static final int SERVERPORT = 6000;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv = (TextView) findViewById(R.id.TextView01);
tv.setText("Nothing from client yet");
this.myCommsThread = new Thread(new CommsThread());
this.myCommsThread.start();
}
#Override
protected void onStop() {
super.onStop();
try {
// make sure you close the socket upon exiting
ss.close();
} catch (IOException e) {
e.printStackTrace();
}
}
Handler myUpdateHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_ID:
TextView tv = (TextView) findViewById(R.id.TextView01);
tv.setText(mClientMsg);
break;
default:
break;
}
super.handleMessage(msg);
}
};
class CommsThread implements Runnable {
public void run() {
Socket s = null;
try {
ss = new ServerSocket(SERVERPORT );
} catch (IOException e) {
e.printStackTrace();
}
while (!Thread.currentThread().isInterrupted()) {
Message m = new Message();
m.what = MSG_ID;
try {
if (s == null)
s = ss.accept();
BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
String st = null;
st = input.readLine();
mClientMsg = st;
myUpdateHandler.sendMessage(m);
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
Have you made sure that you aren't getting an UnknownHostException or a IOException? One of those has to be getting called otherwise socket would not be null.
Change (Exception e) of the error 3 para to NullPointerException and then run the client side and send a message. Error 3 will no longer be displayed on the screen and you will receive the message on Myserver.
Exception e --> NullPointerException
This class returns your response, but also needs permission of internet in manifest file.
public class ChatApplication extends Application {
private Socket mSocket;
{
try {
mSocket = IO.socket("http://chat.socket.io");
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
public Socket getSocket() {
return mSocket;
}
}
I have written code for Client and server connectivity in android.When I run in Emulator it shows 09-16 19:04:14.783: E/ClientActivity(407): java.net.ConnectException: /10.0.2.15:8080 - Connection refused.I referred many developer.android for redirection.But it didn't work.Can anybody say the reason for this exception and how to fix this issue?
ServerActivity.java
package com.example.network;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.Enumeration;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
public class ServerActivity extends Activity {
private TextView serverStatus;
// default ip
public static String SERVERIP = "";
// designate a port
public static final int SERVERPORT = 8080;
private Handler handler = new Handler();
private ServerSocket serverSocket;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_server);
serverStatus = (TextView) findViewById(R.id.textView1);
SERVERIP = getLocalIpAddress();
Thread fst = new Thread(new ServerThread());
fst.start();
}
public class ServerThread implements Runnable {
public void run() {
try {
if (SERVERIP != null) {
handler.post(new Runnable() {
#Override
public void run() {
// Toast.makeText(getApplicationContext(), i.getHostAddress.toString(),Toast.LENGTH_LONG ).show();
serverStatus.setText("Listening on IP: " + SERVERIP);
}
});
serverSocket = new ServerSocket(SERVERPORT);
while (true) {
// listen for incoming clients
Socket client = serverSocket.accept();
handler.post(new Runnable() {
#Override
public void run() {
serverStatus.setText("Connected.");
}
});
try {
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
String line = null;
while ((line = in.readLine()) != null) {
Log.d("ServerActivity", line);
handler.post(new Runnable() {
#Override
public void run() {
// do whatever you want to the front end
// this is where you can be creative
}
});
}
break;
} catch (Exception e) {
handler.post(new Runnable() {
#Override
public void run() {
serverStatus.setText("Oops. Connection interrupted. Please reconnect your phones.");
}
});
e.printStackTrace();
}
}
} else {
handler.post(new Runnable() {
#Override
public void run() {
serverStatus.setText("Couldn't detect internet connection.");
}
});
}
} catch (Exception e) {
handler.post(new Runnable() {
#Override
public void run() {
serverStatus.setText("Error");
}
});
e.printStackTrace();
}
}
}
// gets the ip address of your phone's network
private String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) { return inetAddress.getHostAddress().toString(); }
}
}
} catch (SocketException ex) {
Log.e("ServerActivity", ex.toString());
}
return null;
}
#Override
protected void onStop() {
super.onStop();
try {
// make sure you close the socket upon exiting
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
ClientActivity.java
package com.example.network;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class ClientActivity extends Activity {
private EditText serverIp;
private Button connectPhones;
private String serverIpAddress = "";
private boolean connected = false;
private Handler handler = new Handler();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_client);
serverIp = (EditText) findViewById(R.id.editText1);
connectPhones = (Button) findViewById(R.id.button1);
connectPhones.setOnClickListener(connectListener);
}
private OnClickListener connectListener = new OnClickListener() {
#Override
public void onClick(View v) {
if (!connected) {
serverIpAddress = serverIp.getText().toString();
if (!serverIpAddress.equals("")) {
Thread cThread = new Thread(new ClientThread());
cThread.start();
}
}
}
};
public class ClientThread implements Runnable {
public void run() {
try {
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
Log.d("ClientActivity", "C: Connecting...");
Socket socket = new Socket(serverAddr, ServerActivity.SERVERPORT);
connected = true;
while (connected) {
try {
Log.d("ClientActivity", "C: Sending command.");
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket
.getOutputStream())), true);
// where you issue the commands
out.println("Hey Server!");
Log.d("ClientActivity", "C: Sent.");
} catch (Exception e) {
Log.e("ClientActivity", "S: Error", e);
}
}
socket.close();
Log.d("ClientActivity", "C: Closed.");
} catch (Exception e) {
Log.e("ClientActivity", "C: Error", e);
connected = false;
}
}
}
}
manifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.apache.android.xmpp">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.INTERNET"/>
<application android:name="XMPPDemosApplication"
android:label="XMPP Demo">
<activity android:name=".XMPPClient" android:label="XMPPClient">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
You need to add redirection to work between two emulators da!
In windows, open command prompt and type-- telnet localhost 5554 (this 5554 is the port on which ur receiving emulator is running)
now u'r Telnet gets connected to this emulator. Now type this cmd : redir add tcp:src_port:dst port
the src port refers to the machine port and the dst port refers to the emulator port to which u wanna redirect. This works fine for me :)
If you are using an emulator I would suggest for you to check you firewall settings and make sure that the emulator is an exception
Also, if you're working on a laptop, and moving from one network to another, the emulator often needs to be restarted to pick up the right network settings on the new network.