Web服務器不工作在Android

Question

我想在Android中創建一個簡單的多線程服務器我使用的代碼不給我任何錯誤，但警告請看看我的代碼，並告訴我的錯誤，我有如果運行的Java應用程序代碼工作正常，這裏有雲代碼：

package dolphin.developers.com; 

import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.PrintWriter; 
import java.net.ServerSocket; 
import java.net.Socket; 

import android.app.Activity; 
import android.os.Environment; 
import android.os.Looper; 
import android.util.Log; 


public class AnroidWebServerActivity extends Activity { 
    ServerSocket serverSocket; 

{ 





    try { 

     runserver(); 
    } catch (Exception e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
} 
    public void runserver() throws Exception { 


     serverSocket = new ServerSocket(8080); 
     acceptRequest(); 

    } 

    private void acceptRequest() throws Exception{ 

     while(true){ 

      Socket s = serverSocket.accept(); 
      Log.v("tag", "server is ruunning!!"); 

      ConnectionHandler ch = new ConnectionHandler(s); 
      ch.start(); 
     } 

    } 


     public class ConnectionHandler extends Thread { 

      PrintWriter pw; 
      BufferedReader br; 

      Socket s; 
      public ConnectionHandler(Socket s) throws Exception{ 
       this.s = s; 

       br = new BufferedReader(new InputStreamReader(s.getInputStream())); 
       pw = new PrintWriter(s.getOutputStream()); 



      } 

      @Override 
     public void run() { 
      Looper.loop(); 
       try{ 

       String reqS = ""; 


       while (br.ready() || reqS.length() == 0){ 

        reqS += (char) br.read(); 
     } 

       System.out.println(reqS); 

       HttpRequest req = new HttpRequest(reqS); 
       HttpResponse res = new HttpResponse(req); 


       pw.write(res.response.toCharArray()); 
       pw.close(); 
       br.close(); 
       s.close(); 


       } 
       catch (Exception e) { 
        e.printStackTrace(); 
        } 
       } 


     } 


     public class HttpRequest{ 
      public String filename ; 

     public HttpRequest(String request){ 

       String lines[] = request.split("\n"); 
       lines = lines[0].split(" "); 
       filename = lines[1]; 


      } 

     } 
      public class HttpResponse{ 

       HttpRequest req; 

       String root; 

       String response; 

       public HttpResponse(HttpRequest request){ 
        req=request; 

        root = Environment.getExternalStorageDirectory() + "/"; 

        File f = new File(root + req.filename); 


        try{ 


        response+= "HTTP/1.1 200 \r\n"; 
        response+= "Apache Server /1.0"; 
        response+= "Content-Type: text/html \r\n"; 
        response+="Connection: close \r\n"; 
        response+= "Content-Length:" + f.length() + "\r\n"; 
        response+= "\r\n"; 

        FileInputStream fis = new FileInputStream(f); 


        int s; 

        while ((s = fis.read()) != -1){ 

         response += (char)s ; 


        } 

        fis.close(); 


       }catch(FileNotFoundException fg){ 
        response = response.replace("200", "404"); 

       } 

        catch(IOException e){ 

         response = response.replace("200", "500"); 

         e.printStackTrace(); 
        } 
      } 

} 

} 

的logcat：

07-18 14:34:23.367: W/System.err(1249): android.os.NetworkOnMainThreadException 
07-18 14:34:23.388: W/System.err(1249):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 
07-18 14:34:23.398: W/System.err(1249):  at libcore.io.BlockGuardOs.accept(BlockGuardOs.java:54) 
07-18 14:34:23.398: W/System.err(1249):  at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:98) 
07-18 14:34:23.398: W/System.err(1249):  at java.net.ServerSocket.implAccept(ServerSocket.java:202) 
07-18 14:34:23.398: W/System.err(1249):  at java.net.ServerSocket.accept(ServerSocket.java:127) 
07-18 14:34:23.407: W/System.err(1249):  at dolphin.developers.com.AnroidWebServerActivity.acceptRequest(AnroidWebServerActivity.java:47) 
07-18 14:34:23.407: W/System.err(1249):  at dolphin.developers.com.AnroidWebServerActivity.runserver(AnroidWebServerActivity.java:40) 
07-18 14:34:23.407: W/System.err(1249):  at dolphin.developers.com.AnroidWebServerActivity.<init>(AnroidWebServerActivity.java:30) 
07-18 14:34:23.407: W/System.err(1249):  at java.lang.Class.newInstanceImpl(Native Method) 
07-18 14:34:23.407: W/System.err(1249):  at java.lang.Class.newInstance(Class.java:1319) 
07-18 14:34:23.407: W/System.err(1249):  at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 
07-18 14:34:23.407: W/System.err(1249):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 
07-18 14:34:23.407: W/System.err(1249):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
07-18 14:34:23.407: W/System.err(1249):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
07-18 14:34:23.407: W/System.err(1249):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
07-18 14:34:23.427: W/System.err(1249):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-18 14:34:23.447: W/System.err(1249):  at android.os.Looper.loop(Looper.java:137) 
07-18 14:34:23.447: W/System.err(1249):  at android.app.ActivityThread.main(ActivityThread.java:5039) 
07-18 14:34:23.447: W/System.err(1249):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-18 14:34:23.447: W/System.err(1249):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-18 14:34:23.447: W/System.err(1249):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
07-18 14:34:23.447: W/System.err(1249):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
07-18 14:34:23.447: W/System.err(1249):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

它看起來像你想直接從活動的主線程中運行的服務器。這將阻止您的應用程序運行並最終導致其崩潰。您需要在後臺線程上運行服務器。

正確的方法是將服務器線程移動到服務中，您可以在這裏閱讀更多關於：http://developer.android.com/training/run-background-service/index.html。本文將爲您提供一些在活動中直接使用線程的其他選項：http://www.vogella.com/articles/AndroidBackgroundProcessing/article.html。