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我尝试使用套接字开发客户端 - 服务器通信：android socket编程：客户端服务器通信？
package com.exercise.AndroidClient;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Socket;
import java.net.UnknownHostException;
//import com.app.Client.ClientActivity.ServerThread;
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 AndroidClientActivity extends Activity {
EditText textOut;
TextView textIn;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textOut = (EditText)findViewById(R.id.textout);
Button buttonSend = (Button)findViewById(R.id.send);
textIn = (TextView)findViewById(R.id.textin);
/* Runnable showmessage=new Runnable()
{
@Override
public void run() {
// TODO Auto-generated method stub
}
};*/
/*Thread thd=new Thread(new ServerThread());
thd.start();*/
buttonSend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
DataOutputStream dataOutputStream = null;
try {
Socket socket = new Socket("192.168.1.9", 70);
dataOutputStream = new DataOutputStream(socket.getOutputStream());
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
try {
dataOutputStream.writeUTF(textOut.getText().toString());
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
Thread thd=new Thread(new ServerThread());
thd.start();
/*buttonSend.setOnClickListener(buttonSendOnClickListener)
Button.OnClickListener buttonSendOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
} */
}
public class ServerThread implements Runnable{
@Override
public void run() {
Socket socket = null;
DataOutputStream dataOutputStream = null;
DataInputStream dataInputStream = null;
BufferedReader in=null;
try {
socket = new Socket("192.168.1.9", 70);
InputStream inputStream = socket.getInputStream();
// DataInputStream in1 = new DataInputStream(inputStream);
char chstr[]=new char[512];
//textIn.setText("rafa2");
// DataInputStream inq=new DataInputStream(new BufferedInputStream(inputStream));
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
textIn.setText("rafa1"+in.read(chstr));
// textIn.setText("ramla"+socket+inq.readUTF());
}catch (UnknownHostException e) {
System.err.println("Don't know about host: taranis.");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for "
+ "the connection to: taranis.");
System.exit(1);
}
// dataInputStream = new DataInputStream(socket.getInputStream());
// BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
/* BufferedReader stdIn = null;
try {
socket = new Socket("192.168.110.49", 4023);
stdIn = new BufferedReader(new InputStreamReader(socket.getInputStream()));
textIn.append("gggg"+stdIn.readLine());
String userInput;
while ((userInput =stdIn.readLine()) != null) {
// out.println(userInput);
// System.out.println("echo: " + in.readLine());
textIn.append("rafa");
textIn.append(userInput+stdIn.readLine());
}} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String userInput = null;
/*textIn.append("rafa1");
try {
textIn.append("jjjj"+stdIn.readLine());
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}*/
/* try {
String userInput;
while ((userInput =in1.readLine()) != null) {
// out.println(userInput);
// System.out.println("echo: " + in.readLine());
textIn.append("rafa");
textIn.append(userInput+in.readLine());
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
}
}
}
这里我的问题：为什么客户端无法从服务器接收消息？它接近力量。代码中的错误是什么？它正确地向服务器发送消息。我使用“Hercules”软件作为服务器。
下面是错误的logcat的：
02-26 12:34:35.956: E/AndroidRuntime(679): FATAL EXCEPTION: Thread-8
02-26 12:34:35.956: E/AndroidRuntime(679): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
02-26 12:34:35.956: E/AndroidRuntime(679): at android.view.ViewRoot.checkThread(ViewRoot.java:2802)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.view.ViewRoot.invalidateChild(ViewRoot.java:607)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:633)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.view.ViewGroup.invalidateChild(ViewGroup.java:2505)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.view.View.invalidate(View.java:5139)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.widget.TextView.checkForRelayout(TextView.java:5364)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.widget.TextView.setText(TextView.java:2688)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.widget.TextView.setText(TextView.java:2556)
02-26 12:34:35.956: E/AndroidRuntime(679): at android.widget.TextView.setText(TextView.java:2531)
02-26 12:34:35.956: E/AndroidRuntime(679): at com.exercise.AndroidClient.AndroidClientActivity$ServerThread.run(AndroidClientActivity.java:101)
02-26 12:34:35.956: E/AndroidRuntime(679): at java.lang.Thread.run(Thread.java:1096)
02-26 12:34:36.426: W/IInputConnectionWrapper(679): showStatusIcon on inactive InputConnection
你甚至看过错误信息吗？您试图从UI线程以外的线程修改视图（textIn）... – claesv 2012-02-26 16:04:12
作为个人建议，我建议您在继续项目之前先看看Netty项目。 – jsaye 2012-02-26 17:52:58