我的Android應用程序崩潰，並給出illigale訪問異常，我試圖實現一個tcp服務來與我的服務器進行通信

Question

我想寫一個服務與tcp服務器通信www.herbrich.org:2147

但是我每次運行它時都會崩潰。這是我從服務類完整的代碼。

ServiceClass：

package org.herbrich.katana; 

import android.app.Service; 
import android.content.Intent; 
import android.os.Binder; 
import android.os.IBinder; 

import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.OutputStreamWriter; 
import java.io.PrintWriter; 
import java.net.InetAddress; 
import java.net.Socket; 

import java.util.Random; 

/** 
* Created by Administrator on 16.04.2015. 
*/ 
public class LocalService extends Service{ 
    LocalService() 
    { 
     new Thread(new ClientThread()).start(); 
    } 

    //JenniferHerbrich Network Ansi Declares 
    private Socket socket; 
    private static final int SERVERPORT; 
    private static final String SERVER_IP; 

    static { 
     SERVER_IP = "10.141.0.151"; 
     SERVERPORT = 2147; 

    } 

    // Binder given to clients 
    private final IBinder mBinder = new LocalBinder(); 
    // Random number generator 
    private final Random mGenerator = new Random(); 

    /** 
    * Class used for the client Binder. Because we know this service always 
    * runs in the same process as its clients, we don't need to deal with IPC. 
    */ 
    public class LocalBinder extends Binder { 
     LocalService getService() { 
      // Return this instance of LocalService so clients can call public method 
      return LocalService.this; 
     } 
    } 

    @Override 
    public IBinder onBind(Intent intent) { 
     return mBinder; 
    } 

    /** method for clients */ 
    public int getRandomNumber() { 
     return mGenerator.nextInt(100); 
    } 
    public String communicateWithEvelin(String EvelinValue) 
    { 
     try 
     { 
      BufferedReader input; 
      PrintWriter out = new PrintWriter(new BufferedWriter(
        new OutputStreamWriter(socket.getOutputStream())), 
        true); 
      out.println(EvelinValue); 
      out.flush(); 
      input = new BufferedReader(new InputStreamReader(this.socket.getInputStream())); 
      return input.readLine(); 
     } 
     catch(Exception e) 
     { 
      return "ERROR"; 
     } 
    } 
    class ClientThread implements Runnable { 

     @Override 
     public void run() { 

      try { 
       InetAddress serverAddr = InetAddress.getByName(SERVER_IP); 

       socket = new Socket(serverAddr, SERVERPORT); 

      } catch (IOException e1) { 
       e1.printStackTrace(); 
      } 

     } 

    } 
} 

我想我已經有些問題的構造方法中的多線程調用。調試控制檯給我illegalAccessExceptions ..

的logcat：

04-15 18:52:08.632 9182-9182/org.herbrich.katana E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    java.lang.RuntimeException: Unable to instantiate service org.herbrich.katana.LocalService: java.lang.IllegalAccessException: access to constructor not allowed 
      at android.app.ActivityThread.handleCreateService(ActivityThread.java:2599) 
      at android.app.ActivityThread.access$1700(ActivityThread.java:158) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1384) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:176) 
      at android.app.ActivityThread.main(ActivityThread.java:5365) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:511) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 
      at dalvik.system.NativeStart.main(Native Method) 
    Caused by: java.lang.IllegalAccessException: access to constructor not allowed 
      at java.lang.Class.newInstanceImpl(Native Method) 
      at java.lang.Class.newInstance(Class.java:1319) 
      at android.app.ActivityThread.handleCreateService(ActivityThread.java:2596) 
            at android.app.ActivityThread.access$1700(ActivityThread.java:158) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1384) 
            at android.os.Handler.dispatchMessage(Handler.java:99) 
            at android.os.Looper.loop(Looper.java:176) 
            at android.app.ActivityThread.main(ActivityThread.java:5365) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:511) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 
            at dalvik.system.NativeStart.main(Native Method) 
04-15 18:52:08.640 9182-9197/org.herbrich.katana E/TCP Client﹕ C: Connecting... 

Answer 1

您ClientThread類必須是公開的，並具有公共的零參數的構造函數，而構造函數鏈到superclass'構造。