Java 简单android套接字客户端

我是Android Java编程的新手，所以很难解决我的问题。我有一个简单的node.js服务器，它只需监听localhost:7000并将任何输入打印到控制台（它可以与我的actionscript客户端配合使用）。我需要做一些类似的事情来理解Android，只是简单的客户端套接字发送器，它可以写任何我可以在服务器日志中查看的东西。这是我试图在eclipse Android emulator上使用的代码，如果我使用“localhost”或“127.0.0.1”，它可以正常工作，但不会发生任何错误（服务器日志将为空），如果我将其更改为我的服务器本地地址（这里是wi-fi本地网络，手机使用它），应用程序只需在大冻结后抛出错误，然后关闭。电话也有同样的问题

    <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>

    <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>

客户端：

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();

    }
    }
}

    <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>

    <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>

这是清单代码：

    <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>

    <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>

这是一个简单的用户界面：

    <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>

    <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 以下是eclipse控制台日志：

    <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>

    <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>

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: com.android.internal.view.IInputMethodClient$Stub$Proxy@406c8c68

---

05-05 18:13:49.172:D/AndroidRuntime（1452）：>>>>>>>>>AndroidRuntime START com.android.internal.os.RuntimeInit>AndroidRuntime START com.android.internal.os.RuntimeInit快速修复：主机始终可以通过模拟器访问，IP地址为：10.0.2.2
所以你应该在android代码中使用这个ip地址来连接主机

    <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>

    <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>

更多详细信息（）：

    <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>

    <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>

Android emulator与主机所在的网络不在同一网络上。相反，android emulator是在一个虚拟网络上，在一个虚拟路由器后面。因此模拟器无法连接到主机的专用ip地址（因为它位于不同的网络上）

    <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>

    <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>

当您在android代码中使用localhost（或127.0.0.1）时，这意味着您希望访问android设备，因此在您的情况下没有意义。
要在手机上运行它，您还需要对AndroidManifest.xml具有以下权限：

    <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>

    <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>

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



我希望看到服务器端，因为我没有看到其他错误。
请发布错误和上下文（您是否使用本地主机、网络、模拟器、设备？）。我添加了一些eclipse日志错误。应用程序只是冻结了很长时间，然后用“对不起！应用程序没有应答”关闭。我使用我的本地PC作为node.js服务器，它可以简单地监听7000端口，并在控制台中记录任何传入数据。作为一个客户端，我试着在这台pc上使用emulator，然后在Android智能手机上使用emulator，这两个都会出现类似的错误。我尝试了监听和连接127.0.0.1 7000，然后尝试了连接和监听我的本地ip地址（对于actionscript客户端，一切正常）。感谢您提供此信息。我将其更改为10.0.2.2，并将服务器设置为侦听127.0.0.1，但它仍然抛出相同的错误。我不理解您所说的“将服务器设置为侦听127.0.0.1”是什么意思？它是“server.listen（7000，“127.0.0.1”）；-服务器端事件，侦听本地pc上的7000端口。我也不明白“logcat错误”是什么意思？这是什么？我可以在哪里查看它？@user1324420 For logcat请点击以下链接：谢谢您的许可，但它仍然不起作用。我在更新中添加了服务器端代码。可能想尝试使用简单的java TCP套接字，ServerSocket和Socket就可以了。
    <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>

    <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>