簡單的Android套接字客戶端

我在Android Java編程中很新手，所以很難找出我的問題。我有簡單的node.js服務器，只聽本地主機：7000並打印任何輸入到控制檯（它可以很好地與我的動作客戶端）。我需要做一些類似於理解Android的東西，只需簡單的客戶端套接字發送者，即可以在我的服務器日誌中查看任何內容。這裏是代碼，我試圖在eclipse Android模擬器上使用，如果我使用「localhost」或「127.0.0.1」它沒有錯誤，但沒有任何反應（服務器日誌將是空的），如果我改變它到我的服務器本地地址（這裏是Wi-Fi本地網絡和手機使用它）應用程序只是在大凍結然後關機後拋出錯誤。與手機類似的問題。簡單的Android套接字客戶端

客戶端：

package etc.supachat; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.OutputStream; 
import java.io.PrintWriter; 
import java.net.DatagramPacket; 
import java.net.DatagramSocket; 
import java.net.InetSocketAddress; 
import java.net.Socket; 
import java.net.SocketException; 
import java.net.UnknownHostException; 


import android.app.Activity; 
import android.os.Bundle; 
import android.widget.EditText; 
import android.widget.TextView; 


public class SupaChatActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main);   
     try { 

      Socket s = new Socket("192.168.1.34", 7000); 



      //outgoing stream redirect to socket 

      OutputStream out = s.getOutputStream(); 



      PrintWriter output = new PrintWriter(out); 

      output.println("Hello Android!"); 

      BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream())); 



      //read line(s) 

      String st = input.readLine(); 

      //Close connection 

      s.close(); 





    } catch (UnknownHostException e) { 

      // TODO Auto-generated catch block 

      e.printStackTrace(); 

    } catch (IOException e) { 

      // TODO Auto-generated catch block 

      e.printStackTrace(); 

    } 
    } 
}

這是明顯的代碼：

<uses-sdk android:minSdkVersion="7" /> 
    <uses-permission android:name="android.permission.INTERNET"/> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" > 
     <activity 
      android:name=".SupaChatActivity" 
      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>

這是簡單的用戶界面：

<RelativeLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" > 

     <TextView 
      android:id="@+id/out_view" 
      android:layout_width="162dp" 
      android:layout_height="wrap_content" 
      android:layout_alignParentTop="true" 
      android:layout_centerHorizontal="true" 
      android:text="Large Text" 
      android:textAppearance="?android:attr/textAppearanceLarge" /> 

    </RelativeLayout> 

</LinearLayout>

更新這裏是Eclipse控制檯日誌：

05-05 18:13:49.172: D/AndroidRuntime(1452): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
05-05 18:13:49.172: D/AndroidRuntime(1452): CheckJNI is ON 
05-05 18:13:49.921: D/AndroidRuntime(1452): Calling main entry com.android.commands.pm.Pm 
05-05 18:13:49.950: D/AndroidRuntime(1452): Shutting down VM 
05-05 18:13:49.971: D/dalvikvm(1452): GC_CONCURRENT freed 101K, 71% free 297K/1024K, external 0K/0K, paused 7ms+1ms 
05-05 18:13:49.971: I/AndroidRuntime(1452): NOTE: attach of thread 'Binder Thread #3' failed 
05-05 18:13:49.981: D/dalvikvm(1452): Debugger has detached; object registry had 1 entries 
05-05 18:13:50.491: D/AndroidRuntime(1462): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
05-05 18:13:50.491: D/AndroidRuntime(1462): CheckJNI is ON 
05-05 18:13:51.231: D/AndroidRuntime(1462): Calling main entry com.android.commands.am.Am 
05-05 18:13:51.271: I/ActivityManager(68): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=etc.supachat/.SupaChatActivity } from pid 1462 
05-05 18:13:51.321: I/ActivityManager(68): Start proc etc.supachat for activity etc.supachat/.SupaChatActivity: pid=1470 uid=10035 gids={3003} 
05-05 18:13:51.362: D/AndroidRuntime(1462): Shutting down VM 
05-05 18:13:51.371: D/dalvikvm(1462): GC_CONCURRENT freed 102K, 69% free 319K/1024K, external 0K/0K, paused 1ms+1ms 
05-05 18:13:51.421: D/dalvikvm(1462): Debugger has detached; object registry had 1 entries 
05-05 18:14:01.324: W/ActivityManager(68): Launch timeout has expired, giving up wake lock! 
05-05 18:14:02.033: W/ActivityManager(68): Activity idle timeout for HistoryRecord{406a46a8 etc.supachat/.SupaChatActivity} 
05-05 18:14:07.151: D/dalvikvm(137): GC_EXPLICIT freed 47K, 52% free 2817K/5831K, external 4863K/5566K, paused 84ms 
05-05 18:16:19.360: I/InputDispatcher(68): Application is not responding: AppWindowToken{407b8948 token=HistoryRecord{406a46a8 etc.supachat/.SupaChatActivity}}. 5036.3ms since event, 5035.8ms since wait started 
05-05 18:16:19.360: I/WindowManager(68): Input event dispatching timed out sending to application AppWindowToken{407b8948 token=HistoryRecord{406a46a8 etc.supachat/.SupaChatActivity}} 
05-05 18:16:19.491: I/Process(68): Sending signal. PID: 1470 SIG: 3 
05-05 18:16:19.491: I/dalvikvm(1470): threadid=4: reacting to signal 3 
05-05 18:16:19.520: I/dalvikvm(1470): Wrote stack traces to '/data/anr/traces.txt' 
05-05 18:16:19.531: I/Process(68): Sending signal. PID: 68 SIG: 3 
05-05 18:16:19.531: I/dalvikvm(68): threadid=4: reacting to signal 3 
05-05 18:16:19.580: I/dalvikvm(68): Wrote stack traces to '/data/anr/traces.txt' 
05-05 18:16:19.580: I/Process(68): Sending signal. PID: 125 SIG: 3 
05-05 18:16:19.590: I/dalvikvm(125): threadid=4: reacting to signal 3 
05-05 18:16:19.610: I/dalvikvm(125): Wrote stack traces to '/data/anr/traces.txt' 
05-05 18:16:19.610: I/Process(68): Sending signal. PID: 128 SIG: 3 
05-05 18:16:19.620: I/dalvikvm(128): threadid=4: reacting to signal 3 
05-05 18:16:19.630: I/dalvikvm(128): Wrote stack traces to '/data/anr/traces.txt' 
05-05 18:16:20.030: D/dalvikvm(68): GC_EXPLICIT freed 789K, 47% free 4557K/8519K, external 3520K/3903K, paused 112ms 
05-05 18:16:20.720: E/ActivityManager(68): ANR in etc.supachat (etc.supachat/.SupaChatActivity) 
05-05 18:16:20.720: E/ActivityManager(68): Reason: keyDispatchingTimedOut 
05-05 18:16:20.720: E/ActivityManager(68): Load: 0.09/0.12/0.09 
05-05 18:16:20.720: E/ActivityManager(68): CPU usage from 14302ms to 0ms ago: 
05-05 18:16:20.720: E/ActivityManager(68): 0.4% 68/system_server: 0.2% user + 0.2% kernel 
05-05 18:16:20.720: E/ActivityManager(68): 0.4% 128/com.android.systemui: 0.2% user + 0.1% kernel/faults: 1 minor 
05-05 18:16:20.720: E/ActivityManager(68): 0.1% 125/com.android.phone: 0% user + 0.1% kernel 
05-05 18:16:20.720: E/ActivityManager(68): 0% 12/pdflush: 0% user + 0% kernel 
05-05 18:16:20.720: E/ActivityManager(68): 0% 332/logcat: 0% user + 0% kernel 
05-05 18:16:20.720: E/ActivityManager(68): 1.6% TOTAL: 0.9% user + 0.6% kernel 
05-05 18:16:20.720: E/ActivityManager(68): CPU usage from 678ms to 1270ms later: 
05-05 18:16:20.720: E/ActivityManager(68): 8.3% 68/system_server: 3.3% user + 5% kernel 
05-05 18:16:20.720: E/ActivityManager(68):  8.3% 98/InputDispatcher: 6.6% user + 1.6% kernel 
05-05 18:16:20.720: E/ActivityManager(68): 13% TOTAL: 6.6% user + 6.6% kernel 
05-05 18:16:20.750: I/InputDispatcher(68): Dropping event because the pointer is not down. 
05-05 18:16:23.530: W/ActivityManager(68): Force finishing activity etc.supachat/.SupaChatActivity 
05-05 18:16:23.550: I/ActivityManager(68): Killing etc.supachat (pid=1470): user's request 
05-05 18:16:23.550: I/Process(68): Sending signal. PID: 1470 SIG: 9 
05-05 18:16:23.570: I/ActivityManager(68): Process etc.supachat (pid 1470) has died. 
05-05 18:16:23.770: W/InputManagerService(68): Window already focused, ignoring focus gain of: [email protected]

更新2這裏是服務器端腳本，與ActionScript的客戶端工作（這有點像聊天，我編寫了解新的語言和平臺）：

var net = require("net"), sys = require('util'); 

var names = Array(); 
var streams = Array(); 

var policy = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + 
"<!DOCTYPE cross-domain-policy SYSTEM \"http://www.adobe.com/xml/dtds/cross-domain-policy.dtd\">" + 
"<cross-domain-policy><allow-access-from domain=\"*\" to-ports=\"*\" />" + 
"</cross-domain-policy>\0"; 

function onStreamData(data){ 
    var current_stream = this; 
    console.log(data); 
    if(data.substring(1,20) == "policy-file-request"){ 
     console.log("asd"); 
     current_stream.write(policy); 
    } 

    else if(data.substring(0,6) == "[name]"){ 
     console.log("name"); 
     names.push(data.substring(6, data.length)); 
     streams.push(current_stream); 
    } 

    else 
    { 
     var na; 
     for(i =0; i<names.length; i++){ 
      if(current_stream == streams[i]){ 
       na = names[i] 
      } 
     } 

     for(i =0; i<names.length; i++){ 
      if(streams[i]!=null){ 
       streams[i].write(na+data+"\0"); 
      } 
     } 
    } 
} 

function onClose(){ 
     var current_stream = this; 
     for(i = 0; i<streams.length; i++){ 
      if(streams == current_stream){ 
       streams.splice(i, 1); 
       names.splice(i, 1); 
      } 
     } 
     current_stream.end(); 
} 

var server = net.createServer(function (stream) { 
    stream.setEncoding("utf8"); 
    stream.on('data', onStreamData); 
    stream.on('end', onClose); 
}); 

server.listen(7000, "127.0.0.1");

來源

2012-05-05 user1324420

請發佈錯誤和上下文（當您使用本地主機，網絡，模擬器，設備？）。 – Jack

我添加了一些eclipse日誌錯誤。應用程序只是凍結了很多時間，然後關閉「對不起，應用程序沒有回答」。我使用本地PC作爲node.js服務器，該服務器可以簡單地偵聽7000端口並在輸入數據上記錄控制檯中的任何內容。作爲一個客戶端，我試圖在這款電腦上使用模擬器，然後使用Android智能手機，這兩者都引發了類似的錯誤。我試圖聽和連接127.0.0。1 7000，然後嘗試連接，聽我的本地IP地址（用於動作的客戶這一切工作的罰款）。 – user1324420

快速修復：主機總是可以訪問從仿真器的IP地址：10.0.2.2 所以你應該在android代碼中使用這個ip地址來連接主機。

此外詳細（here）：

Android模擬器是不相同的網絡上，其中主計算機是上。相反，android模擬器位於虛擬路由器後面的虛擬網絡中。因此，仿真器無法連接到主機的私有IP地址（因爲它位於不同的網絡上）。

而當你使用本地主機（或127.0.0.1）在Android的代碼，這意味着你要訪問的Android設備，因此不會在你的情況下才有意義。

來源

2012-05-05 18:37:26

感謝您提供此信息。我將其更改爲10.0.2.2，並設置服務器監聽127.0.0.1，但它仍然拋出了同樣的錯誤。 – user1324420

我不明白你這個是什麼意思「設置服務器監聽127.0.0.1」？ – 2012-05-05 19:00:53

另外，你可以請顯示logcat錯誤？ – 2012-05-05 19:01:10

要在手機上運行它，你還需要在你的AndroidManifest.xml以下權限：

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

我想看看服務器端，因爲我沒有看到其他錯誤。

來源

2012-05-05 23:54:19

感謝這個權限，但它仍然無法正常工作。我在更新中添加服務器端代碼。 – user1324420

可能要使用簡單的Java TCP套接字，ServerSocket的和Socket會做的伎倆去嘗試。 –

簡單的Android套接字客戶端

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