Android: "thread exiting with uncaught exception (group=0x4001d800)"
<p>I'm doing a lan chat app bewteen android (client) and pc (java_server) both running on eclipse.The problem is android very untable and very often crash, however, its running very well on my java version of client and server. please help!</p>

<p>there is my code:</p>

<pre><code>package android.client;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.PriorityQueue;
import java.util.Queue;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
 import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
</code></pre>

<p>public class Chat_client extends Activity implements Runnable {</p>

<pre><code>private Socket socket = null;
//private Thread thread = null;
private DataOutputStream requestOut;
private int clientID;
private String playerName;
private DataInputStream requestIn;
private EditText text;
private ListView msgView;
private ArrayAdapter&lt;String&gt; msgArrayAdapter;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    try {
        socket = new Socket("192.168.2.2", 5558);
        Toast.makeText(this,
                "Connected to " + this.socket.getInetAddress(),
                Toast.LENGTH_LONG + 10).show();
        this.playerName = "wei";
        this.clientID = socket.getLocalPort();
        requestOut = new DataOutputStream(socket.getOutputStream());
        requestIn = new DataInputStream(socket.getInputStream());
        text = (EditText) findViewById(R.id.editText1);// black textfield
        msgArrayAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.message);
        msgView = (ListView) findViewById(R.id.in);
        msgView.setAdapter(this.msgArrayAdapter);
        new Thread(this).start();
    } catch (UnknownHostException uke) {
        Toast.makeText(this, "Host unknown:" + uke.getMessage(),
                Toast.LENGTH_LONG).show();
    } catch (IOException ioe) {
        Toast.makeText(this, "Unexpected exception: " + ioe.getMessage(),
                Toast.LENGTH_LONG).show();
    }
}


// This method is called at button click because we assigned the name to the
// "On Click property" of the button
public void myClickHandler(View v) {
    Toast.makeText(this, "sending", Toast.LENGTH_LONG/2).show();
    TextView view = (TextView) findViewById(R.id.editText1);
    String message = view.getText().toString();
    text.setText("");
    Packet p;
    if (message.startsWith("#")) {
        p = new Packet(playerName, 1, clientID,message.substring(1,    message.length()));
    } 
    else 
        p = new Packet(playerName, -1, clientID,message);
    try {
        this.requestOut.writeUTF(p.convertToSendFormat());
        requestOut.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    msgArrayAdapter.add("Me: &lt;" + message + "&gt;");

}

public void run() {
    while (true) {
        String r;
        try {
            r = this.requestIn.readUTF();
            if (r != null) {
                Packet p = convert(r);
                if (p != null)
                    handle(p);
            }
        } catch (IOException ioe) {
            System.exit(0);
        }
    }
}
private synchronized Packet convert(String n) {
    String data = "";
    String[] p = n.split(" ", 4);
    if (p.length &lt; 4)
        return null;
    data = p[3];
    return new Packet(p[0], Integer.parseInt(p[1]), Integer.parseInt(p[2]),
            data);
}
public synchronized void handle(Packet re) {
    if (re.getChannelID() == clientID){
        msgArrayAdapter.add("Me" + re.toString());}
    else{
        msgArrayAdapter.add(re.getSenderName() + re.toString());
        }
    }
</code></pre>

<p>}</p>

<pre><code>package android.client;

import java.io.Serializable;
/**
 * This class handles the networking packet
 * @author Wei
 */
public class Packet implements Serializable {
    private static final long serialVersionUID = 1509287973845358190L;
    private String senderName;
    private int actionID;
    private long channelID;
    private int sent;
    private String data;

    public Packet(String name, int actionID,int cid, String action2) {
        this.senderName=name;
        this.channelID = cid;
        this.actionID = actionID;
        this.data = action2;
        this.sent = -1;
    }

    public String getSenderName(){
        return this.senderName;
    }
    public int getActionID(){
      return this.actionID;
    }
    public String getData(){
        return this.data;
    }

    protected void setChannelID(int id){
        this.channelID = id;
    }
    public long getChannelID(){
        return this.channelID;
    }

    protected void setSent(boolean b){
        if(b)
        this.sent = 1;
        else
            this.sent=-1;
    }
    protected int checkSent(){
        return this.sent;
    }

    public String toString(){
        return (" : "+this.data);
    }
    public void addTimeStamp(String time){
        this.data+=time;
    }
    public String convertToSendFormat(){
        return this.senderName+" "+this.actionID+" "+this.channelID+" "+this.data;
    }
    public int getFlag() {
        return 0;
    }

    public void setFlag(boolean response) {
    }


}
</code></pre>

<p>there is the Log:</p>

<pre><code>  10-12 12:54:22.763: DEBUG/AndroidRuntime(360): &gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; AndroidRuntime START &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;
10-12 12:54:22.763: DEBUG/AndroidRuntime(360): CheckJNI is ON
10-12 12:54:22.895: DEBUG/AndroidRuntime(360): --- registering native functions ---
10-12 12:54:23.513: INFO/ActivityManager(59): Force stopping package android.client uid=10033
10-12 12:54:23.513: INFO/ActivityManager(59): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=android.client/.Chat_client }
10-12 12:54:23.633: DEBUG/AndroidRuntime(360): Shutting down VM
10-12 12:54:23.645: INFO/ActivityManager(59): Start proc android.client for activity android.client/.Chat_client: pid=366 uid=10033 gids={3003}
10-12 12:54:23.664: DEBUG/jdwp(360): Got wake-up signal, bailing out of select
10-12 12:54:23.664: DEBUG/dalvikvm(360): Debugger has detached; object registry had 1 entries
10-12 12:54:24.024: WARN/ActivityThread(366): Application android.client is waiting for the debugger on port 8100...
10-12 12:54:24.044: INFO/System.out(366): Sending WAIT chunk
10-12 12:54:24.054: INFO/dalvikvm(366): Debugger is active
10-12 12:54:24.244: INFO/System.out(366): Debugger has connected
10-12 12:54:24.244: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:24.444: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:24.644: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:24.843: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:25.053: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:25.254: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:25.454: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:25.654: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:25.866: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:26.075: INFO/System.out(366): waiting for debugger to settle...
10-12 12:54:26.284: INFO/System.out(366): debugger has settled (1322)
10-12 12:54:27.544: INFO/ActivityManager(59): Displayed activity android.client/.Chat_client: 3912 ms (total 3912 ms)
10-12 12:54:33.313: DEBUG/dalvikvm(124): GC_EXPLICIT freed 642 objects / 35976 bytes in 203ms
10-12 12:54:38.335: DEBUG/dalvikvm(225): GC_EXPLICIT freed 152 objects / 11144 bytes in 177ms
10-12 12:54:43.384: DEBUG/dalvikvm(261): GC_EXPLICIT freed 249 objects / 11840 bytes in 205ms
10-12 12:55:14.583: WARN/KeyCharacterMap(108): No keyboard for id 0
10-12 12:55:14.583: WARN/KeyCharacterMap(108): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
10-12 12:55:37.295: WARN/dalvikvm(366): threadid=7: thread exiting with uncaught exception (group=0x4001d800)
</code></pre>
