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我有一個關於Android套接字客戶端應用程序的問題。我想用它來測試與套接字服務器軟件的連接。但是每當我按下任何一個按鈕時，應用程序崩潰。有誰知道問題出在我的應用程序中？Android套接字客戶端問題
package ab.2develop.Sockets;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.ToggleButton;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.Toast;
import android.os.SystemClock;
public class SocketsActivity extends Activity {
static final String NICKNAME = "abc";
Button btn_start;
public static ProgressBar progressBar;//id of progressbar
public static ProgressBar lamp1; //id of progressbar
public TextView txt_percentage;
//---socket---
InetAddress serverAddress;
Socket socket;
//---all the Views---
static TextView txtMessagesReceived;
static TextView numBytesReceived;
EditText txtMessage;
//---thread for communicating on the socket---
CommsThread commsThread;
//---used for updating the UI on the main activity---
static Handler UIupdater = new Handler() {
public int value1;
public int value2;
@Override
public void handleMessage(Message msg) {
int numOfBytesReceived = msg.arg1;
byte[] buffer = (byte[]) msg.obj;
//---convert the entire byte array to string---
String strReceived = new String(buffer);
//---extract only the actual string received---
strReceived = strReceived.substring(
0, numOfBytesReceived);
String strleft = strReceived.substring(0,3);
// value1++;
if (strleft.equals("111"))
{
value1++;
progressBar.setProgress(value1);
}
if (strleft.equals("110"))
{
value1--;
progressBar.setProgress(value1);
}
if (strleft.equals("221"))
{
value2++;
lamp1.setProgress(value2);
}
if (strleft.equals("220"))
{
value2--;
lamp1.setProgress(value2);
}
//---display the text received on the TextView---
txtMessagesReceived.setText("");
txtMessagesReceived.setText(
// txtMessagesReceived.getText().toString() +
// strReceived + numOfBytesReceived + value1);
txtMessagesReceived.getText().toString() + strleft + value1);
// numBytesReceived.setText(
// numBytesReceived.getText());
}
};
private class CreateCommThreadTask extends AsyncTask
<Void, Integer, Void> {
@Override
protected Void doInBackground(Void... params) {
try {
//---create a socket---
serverAddress =
//InetAddress.getByName("192.168.1.105");
//socket = new Socket(serverAddress, 500);
InetAddress.getByName("192.168.0.200");
socket = new Socket(serverAddress, 5000);
commsThread = new CommsThread(socket);
commsThread.start();
//---sign in for the user; sends the nick name---
sendToServer(NICKNAME);
} catch (UnknownHostException e) {
Log.d("Sockets", e.getLocalizedMessage());
} catch (IOException e) {
Log.d("Sockets", e.getLocalizedMessage());
}
return null;
}
}
private class WriteToServerTask extends AsyncTask
<byte[], Void, Void> {
protected Void doInBackground(byte[]...data) {
commsThread.write(data[0]);
return null;
}
}
private class CloseSocketTask extends AsyncTask
<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
try {
socket.close();
} catch (IOException e) {
Log.d("Sockets", e.getLocalizedMessage());
}
return null;
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//---get the views---
txtMessagesReceived = (TextView)
findViewById(R.id.txtMessagesReceived);
btn_start = (Button) findViewById(R.id.btn_start);
progressBar = (ProgressBar) findViewById(R.id.progress);
lamp1 = (ProgressBar) findViewById(R.id.lamp1);
txt_percentage= (TextView) findViewById(R.id.txt_percentage);
btn_start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
btn_start.setEnabled(false);
}
});
}
public void onClickSend(View view) {
//---send the message to the server---
sendToServer(txtMessage.getText().toString());
}
private void sendToServer(String message) {
byte[] theByteArray =
message.getBytes();
new WriteToServerTask().execute(theByteArray);
}
@Override
public void onResume() {
super.onResume();
new CreateCommThreadTask().execute();
}
@Override
public void onPause() {
super.onPause();
new CloseSocketTask().execute();
}
public void onClickLight11(View view) {
//---send the message to the server---
String str = "101".toString();
sendToServer(str);
//sendToServer(txtMessage.getText().toString());
}
public void onClickLight21(View view) {
//---send the message to the server---
String str = "201".toString();
sendToServer(str);
//sendToServer(txtMessage.getText().toString());
}
public void onClickLight31(View view) {
//---send the message to the server---
String str = "301".toString();
sendToServer(str);
//sendToServer(txtMessage.getText().toString());
}
public void onClickLight00(View view) {
//---send the message to the server---
String str = "000".toString();
sendToServer(str);
//sendToServer(txtMessage.getText().toString());
}
public void onClickLight55(View view) {
//---send the message to the server---
String str = "555".toString();
sendToServer(str);
//sendToServer(txtMessage.getText().toString());
}
public void onToggleClicked(View view) {
// Is the toggle on?
boolean on = ((ToggleButton) view).isChecked();
if (on) {
String str = "301".toString();
sendToServer(str);
} else {
String str = "000".toString();
sendToServer(str);
}
}
}
package ab.2develop.Sockets;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import android.util.Log;
public class CommsThread extends Thread {
private final Socket socket;
private final InputStream inputStream;
private final OutputStream outputStream;
public CommsThread(Socket sock) {
socket = sock;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
//---creates the inputstream and outputstream objects
// for reading and writing through the sockets---
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.d("SocketChat", e.getLocalizedMessage());
}
inputStream = tmpIn;
outputStream = tmpOut;
}
public void run() {
//---buffer store for the stream---
byte[] buffer = new byte[1024];
//---bytes returned from read()---
int bytes;
//---keep listening to the InputStream until an
// exception occurs---
while (true) {
try {
//---read from the inputStream---
bytes = inputStream.read(buffer);
//---update the main activity UI---
SocketsActivity.UIupdater.obtainMessage(
0,bytes, -1, buffer).sendToTarget();
} catch (IOException e) {
break;
}
}
}
//---call this from the main activity to
// send data to the remote device---
public void write(byte[] bytes) {
try {
outputStream.write(bytes);
} catch (IOException e) { }
}
//---call this from the main activity to
// shutdown the connection---
public void cancel() {
try {
socket.close();
} catch (IOException e) { }
}
}
<?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" >
<Button
android:id="@+id/btn_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/progress"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:minWidth="120dp"
android:text="@string/start_btn" />
<TextView
android:id="@+id/txtMessagesReceived"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:textSize="30dip"
android:text="@string/msg_received"
android:scrollbars = "vertical" />
<TextView
android:id="@+id/txt_percentage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/progress"
android:text="downloading 0%"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/numBytesReceived"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:textSize="30dip"
android:text="@string/num_msg_received"
android:scrollbars = "vertical" />
<Button
android:id="@+id/Light11"
android:textSize="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClickLight11"
android:text="@string/button_send_Light11" />
<Button
android:id="@+id/Light21"
android:textSize="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClickLight21"
android:text="@string/button_send_Light21" />
<Button
android:id="@+id/Light31"
android:textSize="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClickLight31"
android:text="@string/button_send_Light31" />
<Button
android:id="@+id/Light00"
android:textSize="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClickLight00"
android:text="@string/button_send_Light00" />
<Button
android:id="@+id/Light55"
android:textSize="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClickLight55"
android:text="@string/button_send_Light55" />
<ToggleButton
android:id="@+id/togglebutton"
android:textSize="30dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textOn="Light1 on"
android:textOff="Light1 off"
android:onClick="onToggleClicked"/>
<ProgressBar
android:id="@+id/progress"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_marginTop="34dp" />
<ProgressBar
android:id="@+id/lamp1"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="34dp" />
</LinearLayout>
你可以發佈你的LogCat輸出嗎？這將幫助我們找到問題。 –
已更新。請檢查我 –
SocketActivity的第131行是什麼？ –