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Android应用程序无法连接到服务器

2013-09-23 57 views
1

我正在尝试编写一个连接到我用java编写的服务器的Android应用程序。这里是我的代码（这被称为当我点击一个按钮）：Android应用程序无法连接到服务器

package me.nrubin29.quiz.student; 

import android.app.Activity; 
import android.widget.Toast; 

import java.io.EOFException; 
import java.io.ObjectInputStream; 
import java.io.ObjectOutputStream; 
import java.net.Socket; 

public class Connection { 

    private Socket socket; 
    private Thread reader; 
    private ObjectInputStream inputStream; 
    private ObjectOutputStream outputStream; 

    public void initConnection(final Activity activity, String ip, String port, String name) { 
     try { 
      Toast.makeText(activity.getApplicationContext(), "Starting connection to " + ip + ":" + Integer.parseInt(port), Toast.LENGTH_SHORT).show(); 

      socket = new Socket(ip, Integer.parseInt(port)); 

      Toast.makeText(activity.getApplicationContext(), "Connected!", Toast.LENGTH_SHORT).show(); 

      outputStream = new ObjectOutputStream(socket.getOutputStream()); 

      inputStream = new ObjectInputStream(socket.getInputStream()); 

      outputStream.writeObject(name); 

      reader = new Thread(new Runnable() { 
       public void run() { 
        while (true) { 
         try { 
          Object in = inputStream.readObject(); 
          System.out.println(in); 
         } 
         catch (EOFException e) { Toast.makeText(activity.getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show(); } 
         catch (Exception e) { e.printStackTrace(); } 
        } 
       } 
      }); 

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

先敬酒显示（用正确的端口和IP），但第二个永远不会到来。手机和电脑都连接到同一个网络，并且我确定使用服务器的正确内部IP和端口。

对不起，如果这是一个不好的问题，我很新。

UPDATE：

看起来有是错误。那就是：

09-23 01:00:00.963: WARN/System.err(890): java.net.SocketException: socket failed: EACCES (Permission denied) 
09-23 01:00:00.963: WARN/System.err(890): at libcore.io.IoBridge.socket(IoBridge.java:583) 
09-23 01:00:00.963: WARN/System.err(890): at java.net.PlainSocketImpl.create(PlainSocketImpl.java:201) 
09-23 01:00:00.972: WARN/System.err(890): at java.net.Socket.startupSocket(Socket.java:559) 
09-23 01:00:00.972: WARN/System.err(890): at java.net.Socket.tryAllAddresses(Socket.java:127) 
09-23 01:00:00.972: WARN/System.err(890): at java.net.Socket.<init>(Socket.java:177) 
09-23 01:00:00.972: WARN/System.err(890): at java.net.Socket.<init>(Socket.java:149) 
09-23 01:00:00.972: WARN/System.err(890): at me.nrubin29.quiz.student.Connection.initConnection(Connection.java:22) 
09-23 01:00:00.972: WARN/System.err(890): at me.nrubin29.quiz.student.Main$1.onClick(Main.java:35) 
09-23 01:00:00.983: WARN/System.err(890): at android.view.View.performClick(View.java:4204) 
09-23 01:00:00.983: WARN/System.err(890): at android.view.View$PerformClick.run(View.java:17355) 
09-23 01:00:00.983: WARN/System.err(890): at android.os.Handler.handleCallback(Handler.java:725) 
09-23 01:00:00.983: WARN/System.err(890): at android.os.Handler.dispatchMessage(Handler.java:92) 
09-23 01:00:00.983: WARN/System.err(890): at android.os.Looper.loop(Looper.java:137) 
09-23 01:00:00.993: WARN/System.err(890): at android.app.ActivityThread.main(ActivityThread.java:5041) 
09-23 01:00:00.993: WARN/System.err(890): at java.lang.reflect.Method.invokeNative(Native Method) 
09-23 01:00:00.993: WARN/System.err(890): at java.lang.reflect.Method.invoke(Method.java:511) 
09-23 01:00:00.993: WARN/System.err(890): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
09-23 01:00:01.003: WARN/System.err(890): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
09-23 01:00:01.003: WARN/System.err(890): at dalvik.system.NativeStart.main(Native Method) 
09-23 01:00:01.013: WARN/System.err(890): Caused by: libcore.io.ErrnoException: socket failed: EACCES (Permission denied) 
09-23 01:00:01.013: WARN/System.err(890): at libcore.io.Posix.socket(Native Method) 
09-23 01:00:01.013: WARN/System.err(890): at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:181) 
09-23 01:00:01.023: WARN/System.err(890): at libcore.io.IoBridge.socket(IoBridge.java:568) 
09-23 01:00:01.023: WARN/System.err(890): ... 18 more

更新两个：

这里是我的AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
      package="me.nrubin29.quiz.student" 
      android:versionCode="1" 
      android:versionName="1.0"> 
    <uses-sdk android:minSdkVersion="15"/> 
    <uses-permission android:name="android.permission.INTERNET"/> 
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher" android:name=".App"> 
     <activity android:name="Main" 
        android:label="@string/app_name"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN"/> 
       <category android:name="android.intent.category.LAUNCHER"/> 
      </intent-filter> 
     </activity> 
    </application> 
</manifest>

，这里是另一个新的错误：

09-23 01:17:00.618: WARN/System.err(1109): android.os.NetworkOnMainThreadException 
09-23 01:17:00.638: WARN/System.err(1109): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 
09-23 01:17:00.638: WARN/System.err(1109): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
09-23 01:17:00.648: WARN/System.err(1109): at libcore.io.IoBridge.connectErrno(IoBridge.java:127) 
09-23 01:17:00.648: WARN/System.err(1109): at libcore.io.IoBridge.connect(IoBridge.java:112) 
09-23 01:17:00.648: WARN/System.err(1109): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
09-23 01:17:00.648: WARN/System.err(1109): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) 
09-23 01:17:00.668: WARN/System.err(1109): at java.net.Socket.startupSocket(Socket.java:566) 
09-23 01:17:00.668: WARN/System.err(1109): at java.net.Socket.tryAllAddresses(Socket.java:127) 
09-23 01:17:00.668: WARN/System.err(1109): at java.net.Socket.<init>(Socket.java:177) 
09-23 01:17:00.668: WARN/System.err(1109): at java.net.Socket.<init>(Socket.java:149) 
09-23 01:17:00.668: WARN/System.err(1109): at me.nrubin29.quiz.student.Connection.initConnection(Connection.java:22) 
09-23 01:17:00.688: WARN/System.err(1109): at me.nrubin29.quiz.student.Main$1.onClick(Main.java:35) 
09-23 01:17:00.688: WARN/System.err(1109): at android.view.View.performClick(View.java:4204) 
09-23 01:17:00.701: WARN/System.err(1109): at android.view.View$PerformClick.run(View.java:17355) 
09-23 01:17:00.708: WARN/System.err(1109): at android.os.Handler.handleCallback(Handler.java:725) 
09-23 01:17:00.708: WARN/System.err(1109): at android.os.Handler.dispatchMessage(Handler.java:92) 
09-23 01:17:00.719: WARN/System.err(1109): at android.os.Looper.loop(Looper.java:137) 
09-23 01:17:00.719: WARN/System.err(1109): at android.app.ActivityThread.main(ActivityThread.java:5041) 
09-23 01:17:00.738: WARN/System.err(1109): at java.lang.reflect.Method.invokeNative(Native Method) 
09-23 01:17:00.738: WARN/System.err(1109): at java.lang.reflect.Method.invoke(Method.java:511) 
09-23 01:17:00.748: WARN/System.err(1109): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
09-23 01:17:00.748: WARN/System.err(1109): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
09-23 01:17:00.758: WARN/System.err(1109): at dalvik.system.NativeStart.main(Native Method) 
09-23 01:17:00.908: INFO/Choreographer(613): Skipped 71 frames! The application may be doing too much work on its main thread.

更新3

移动连接东西一个新的线程，但现在没有，当我点击完成按钮发生（先敬酒不显示）：

package me.nrubin29.quiz.student; 

import android.app.Activity; 
import android.widget.Toast; 

import java.io.EOFException; 
import java.io.ObjectInputStream; 
import java.io.ObjectOutputStream; 
import java.net.Socket; 

public class Connection { 

    private Socket socket; 
    private Thread reader; 
    private ObjectInputStream inputStream; 
    private ObjectOutputStream outputStream; 

    public void initConnection(final Activity activity, final String ip, final String port, final String name) { 
     new Thread(new Runnable() { 
      public void run() { 
       try { 
        Toast.makeText(activity.getApplicationContext(), "Starting connection to " + ip + ":" + Integer.parseInt(port), Toast.LENGTH_SHORT).show(); 

        socket = new Socket(ip, Integer.parseInt(port)); 

        Toast.makeText(activity.getApplicationContext(), "Connected!", Toast.LENGTH_SHORT).show(); 

        outputStream = new ObjectOutputStream(socket.getOutputStream()); 

        inputStream = new ObjectInputStream(socket.getInputStream()); 

        outputStream.writeObject(name); 

        reader = new Thread(new Runnable() { 
         public void run() { 
          while (true) { 
           try { 
            Object in = inputStream.readObject(); 
            System.out.println(in); 
           } 
           catch (EOFException e) { Toast.makeText(activity.getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show(); } 
           catch (Exception e) { e.printStackTrace(); } 
          } 
         } 
        }); 

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

而且看起来我们有一个错误：

09-23 01:26:12.939: WARN/ActivityManager(308): Unbind failed: could not find connection for [email protected] 
09-23 01:26:26.028: WARN/System.err(1276): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 
09-23 01:26:26.028: WARN/System.err(1276): at android.os.Handler.<init>(Handler.java:197) 
09-23 01:26:26.028: WARN/System.err(1276): at android.os.Handler.<init>(Handler.java:111) 
09-23 01:26:26.028: WARN/System.err(1276): at android.widget.Toast$TN.<init>(Toast.java:324) 
09-23 01:26:26.059: WARN/System.err(1276): at android.widget.Toast.<init>(Toast.java:91) 
09-23 01:26:26.059: WARN/System.err(1276): at android.widget.Toast.makeText(Toast.java:238) 
09-23 01:26:26.059: WARN/System.err(1276): at me.nrubin29.quiz.student.Connection$1.run(Connection.java:22) 
09-23 01:26:26.059: WARN/System.err(1276): at java.lang.Thread.run(Thread.java:856)

来源

2013-09-23 nrubin29

+0

在创建Socket对象你得到任何logcat的消息？任何异常/消息？如果是这样，请发布。 – prijupaul

+0

@prijupaul我想我找到了一个错误。将其添加到问题中。 – nrubin29

回答

3

它说“权限被拒绝”。你的清单文件中是否有<uses-permission android:name="android.permission.INTERNET"/>？

来源

2013-09-23 01:05:31 prijupaul

+0

我从来没有明确指出它，所以我猜不是。它会是“AndroidManifest.xml”，我在哪里放置该行？ – nrubin29

+0

是的。 AndroidManifest.xml文件。在标签下。 – prijupaul

+0

查看更新二。 – nrubin29

0

这个例外是因为你试图从后台线程显示一个UI元素（Toast）。

您需要在UI线程中创建一个处理程序，然后从run方法发布handler消息。

像这样

在你的UI线程：

final Handler handler = new Handler() { 
    @Override 
    public void handleMessage(final Message msgs) { 
    // Show toast here based on your Message.WHAT Parameter. 
    } 
    } 

new Thread(new Runnable() { 
    @Override 
    public void run() { 
    handler.sendEmptyMessage(1); 

    } 
    }).start();

来源

2013-09-23 19:46:29 prijupaul

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