I am trying to do a simple chat client for the Android (running 2.3.3 on an emulator on my computer and programing in eclipse. Below is a copy of my client code which is working fine as a normal java app. Below that I have what I have been working on for the Android client-- I am just stuck on how to make the client work for the phone and how to add certain listeners. Below that is a copy of my layout.
Normal Chat Client
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.swing.*;
public class ChatClient extends JFrame {
Socket _socket;
JTextArea _textArea;
JTextField _textField;
JScrollPane _scrollPane;
public ChatClient() {
super("Chat Client");
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent ev) {
try {
InetAddress host = InetAddress.getLocalHost();
sendText(host.getHostAddress() + " Left.");
_socket.close();
}
catch (IOException ex) {
System.err.println("Close failed. " + ex);
}
System.exit(0);
}
});
setLayout(new BorderLayout());
_textArea = new JTextArea(10, 40);
_textArea.setLineWrap(true);
_textArea.setEditable(false);
_scrollPane = new JScrollPane(_textArea);
add(_scrollPane, BorderLayout.CENTER);
_textField = new JTextField(30);
_textField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
sendText(_textField.getText());
_textField.setText("");
}
});
JButton sendButton = new JButton("Send");
sendButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
sendText(_textField.getText());
_textField.setText("");
}
});
JPanel entryPanel = new JPanel(new BorderLayout());
entryPanel.add(_textField, BorderLayout.CENTER);
entryPanel.add(sendButton, BorderLayout.EAST);
add(entryPanel, BorderLayout.SOUTH);
pack();
setVisible(true);
try {
InetAddress host = InetAddress.getLocalHost();
String address = host.getHostAddress();
_textArea.append("Connecting to: " + address + "\n");
_socket = new Socket(host, 7777);
_textArea.append("Connected\n");
sendText(address + " Joined.");
while (!_socket.isClosed()) {
try {
InputStream input = _socket.getInputStream();
int available = input.available();
if (available > 0) {
byte[] bytes = new byte[available];
input.read(bytes);
_textArea.append(new String(bytes) + "\n");
JScrollBar scroll = _scrollPane.getVerticalScrollBar();
scroll.setValue(scroll.getMaximum());
}
Thread.sleep(100);
}
catch (IOException ex) {
System.err.println("Listen failed " + ex);
}
catch (InterruptedException ex) {
System.err.println("Sleep interrupted " + ex);
}
}
}
catch (IOException ex) {
System.err.println("Connection failed. " + ex);
System.exit(1);
}
}
private void sendText(String s) {
try {
OutputStream output = _socket.getOutputStream();
output.write(new String(s).getBytes());
output.flush();
}
catch (IOException ex) {
System.err.println("Send error: " + ex);
}
}
public static void main(String[] args) {
new ChatClient();
}
}Unworking Android Client
package android.test;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.*;
import java.io.*;
import java.net.*;
public class Main extends Activity {
private Socket _socket;
private EditText _editText;
private EditText _textArea;
private Button _button;
private AsyncTask<Void, String, Void> _task;
private int _appendCount;
private boolean _running;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_editText = (EditText)findViewById(R.id.editText);
_textArea = (EditText)findViewById(R.id.editText1);
_button = (Button)findViewById(R.id.button);
Log.d("onCreate()", "Hello World");
try {
_socket = new Socket(InetAddress.getByName("10.0.2.2"), 7777);
}
catch (IOException ex) { Log.e("Socket connection error", ex.toString()); }
_task = new AsyncTask<Void, String, Void>() {
@Override
protected Void doInBackground(Void... param) {
while (true) {
try {
InputStream input = _socket.getInputStream();
int available = input.available();
if (available > 0) {
byte[] bytes = new byte[available];
input.read(bytes);
_editText.append(new String(bytes) + "\n");
}
Thread.sleep(10);
}
catch (InterruptedException ex) { Log.e("interrupted", ex.toString()); }
catch (IOException ex) { System.err.println("Listen failed " + ex); }
}
}
@Override
protected void onProgressUpdate(String... progress) {
_editText.append(progress[0]);
}
};
}
public void buttonClicked(View view) {
sendText(_textArea.getText());
_textArea.setText("");
}
private void sendText(String s) {
try {
OutputStream output = _socket.getOutputStream();
output.write(new String(s).getBytes());
output.flush();
}
catch (IOException ex) {
System.err.println("Send error: " + ex);
}
}
}Layout
<?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" >
<EditText
android:id="@+id/editText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:editable="false"
android:lines="4" />
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<requestFocus />
</EditText>
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="buttonClicked"
android:text="Send" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Exit" />
</LinearLayout>
</LinearLayout>