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我正在編寫一個代碼，需要每秒從Android移動設備向臺式計算機（linux服務器）發送數據。由於數據經常發送，通過Http命中無法實現（因爲會消耗時間），所以Tcp通信似乎是更好的選擇，因爲android手機的數據可以通過此套接字編程快速發送。 客戶端的Android手機上的代碼是：Android和Linux服務器之間的TCP連接
import java.io.IOException;
import java.io.OutputStream;
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.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class GetWebPage extends Activity {
//Handler h;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final EditText eText = (EditText) findViewById(R.id.address);
final TextView tView = (TextView) findViewById(R.id.pagetext);
final Button button = (Button) findViewById(R.id.ButtonGo);
button.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
try {
Log.v("Tcp","Clicked the button");
InetAddress serveraddress=InetAddress.getByName("67.23.14.156");
Log.v("Tcp", "Got the InetAddress");
Socket s = new Socket(serveraddress,4447);
Log.v("Tcp","Got the Socket address");
OutputStream out = s.getOutputStream();
PrintWriter output = new PrintWriter(out);
output.println("Hello Android!");
out.close();
} catch (UnknownHostException e) {
tView.setText(e.toString());
Log.v("Tcp",e.toString());
} catch (IOException e) {
tView.setText(e.toString());
Log.v("Tcp",e.toString());
}catch (Exception e) {
tView.setText(e.toString());
}
}
});
}
}
服務器端代碼：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
public class ListenIncomingTcpConnection {
public static void main(String[] args) {
ServerSocket serverSocket=null;
Socket client=null;
try {
System.out.println("Creating the server object...");
serverSocket = new ServerSocket(4447);
System.out.println("Waiting for the connection...");
} catch (IOException e1) {
System.out.println(e1);
}
while (true) {
try {
client = serverSocket.accept();
System.out.println("Reading the content...");
} catch (IOException e1) {
System.out.println(e1);
e1.printStackTrace();
}
try {
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
String str = in.readLine();
System.out.println("Reading the content.....");
} catch(Exception e) {
System.out.println(e);
} finally {
try{
client.close();
}catch(Exception e){
System.out.println(e);
}
}
}//while
}//PSVM
}
清單文件的代碼是：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.spce" android:versionCode="1" android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name="GetWebPage">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
</manifest>
我已經執行了服務器端的代碼在linux機器上通過putty上的「java」命令。它在此行執行並停止「client = serverSocket.accept（）;」 當我執行的Android手機客戶端，它說：
單擊該按鈕 得到InetAddress是否 java.net.SocketException異常：沒有到主機的路由
我不能夠發現的這種情況的原因沒有路由到主機。
請幫忙解決問題。