无法创建android客户端套接字[重复]

Question

我正在尝试创建一个连接到我桌面上的服务器的 Android 客户端应用程序。
我成功地从笔记本电脑远程登录到服务器。
我已将 INTERNET 和 NETWORK 权限放入清单文件中。
创建套接字时程序崩溃，eclipse 调试器让我进入 socket.class 源文件。

更新： 这是我的完整代码

public class EsmFamilActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_esm_famil);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.esm_famil, menu);
    return true;
}

//handler for sendtoserver
public void sendToServer(View view){

    ...


    String host = "192.168.1.7";
    int port = 8888;
    try{
        Socket s = new Socket(host, port);
        Writer out = new OutputStreamWriter(s.getOutputStream());
        out.write(data + "\n");
        out.flush();
        s.close();
    }catch (UnknownHostException ex) {
        ex.printStackTrace();
    }catch(IOException ex){
        ex.printStackTrace();
    }

}

}

这是我的日志

01-18 21:43:06.908: D/TextView(1608): Constructor -- Got mEditTextBackgroundColor
01-18 21:43:09.658: W/IInputConnectionWrapper(1608): beginBatchEdit on inactive InputConnection
01-18 21:43:09.668: W/IInputConnectionWrapper(1608): endBatchEdit on inactive InputConnection
01-18 21:43:11.448: W/IInputConnectionWrapper(1608): beginBatchEdit on inactive InputConnection
01-18 21:43:11.448: W/IInputConnectionWrapper(1608): endBatchEdit on inactive InputConnection
01-18 21:43:46.018: D/AndroidRuntime(1608): Shutting down VM
01-18 21:43:46.018: W/dalvikvm(1608): threadid=1: thread exiting with uncaught exception (group=0x42f02500)
01-18 21:43:46.038: E/AndroidRuntime(1608): FATAL EXCEPTION: main
01-18 21:43:46.038: E/AndroidRuntime(1608): java.lang.IllegalStateException: Could not execute method of the activity
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.view.View$1.onClick(View.java:3678)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.view.View.performClick(View.java:4300)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.view.View$PerformClick.run(View.java:18026)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.os.Handler.handleCallback(Handler.java:730)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.os.Handler.dispatchMessage(Handler.java:92)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.os.Looper.loop(Looper.java:150)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.app.ActivityThread.main(ActivityThread.java:5162)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.lang.reflect.Method.invokeNative(Native Method)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.lang.reflect.Method.invoke(Method.java:525)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at dalvik.system.NativeStart.main(Native Method)
01-18 21:43:46.038: E/AndroidRuntime(1608): Caused by: java.lang.reflect.InvocationTargetException
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.lang.reflect.Method.invokeNative(Native Method)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.lang.reflect.Method.invoke(Method.java:525)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.view.View$1.onClick(View.java:3673)
01-18 21:43:46.038: E/AndroidRuntime(1608):     ... 11 more
01-18 21:43:46.038: E/AndroidRuntime(1608): Caused by: android.os.NetworkOnMainThreadException
01-18 21:43:46.038: E/AndroidRuntime(1608):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at libcore.io.IoBridge.connect(IoBridge.java:112)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.net.Socket.startupSocket(Socket.java:566)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.net.Socket.tryAllAddresses(Socket.java:127)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.net.Socket.<init>(Socket.java:177)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at java.net.Socket.<init>(Socket.java:149)
01-18 21:43:46.038: E/AndroidRuntime(1608):     at com.example.myfirstapp.EsmFamilActivity.sendToServer(EsmFamilActivity.java:61)
01-18 21:43:46.038: E/AndroidRuntime(1608):     ... 14 more
01-18 21:43:53.518: I/Process(1608): Sending signal. PID: 1608 SIG: 9
01-18 21:43:53.668: D/TextView(2467): Constructor - Got Res id for appearance for textColorPrimaryInverse
01-18 21:43:53.668: W/ResourceType(2467): Skipping entry 0x1060085 in package table 0 because it is not complex!
01-18 21:43:53.668: D/TextView(2467): Constructor - Got appearance for textColorPrimaryInverse
01-18 21:43:53.668: D/TextView(2467): Constructor -- Got mEditTextBackgroundColor
01-18 21:43:53.998: D/libEGL(2467): loaded /vendor/lib/egl/libEGL_POWERVR_SGX544_115.so
01-18 21:43:54.078: D/libEGL(2467): loaded /vendor/lib/egl/libGLESv1_CM_POWERVR_SGX544_115.so
01-18 21:43:54.088: D/libEGL(2467): loaded /vendor/lib/egl/libGLESv2_POWERVR_SGX544_115.so
01-18 21:43:54.088: E/IMGSRV(2467): :0: PVRDRMOpen: TP3, ret = 42
01-18 21:43:54.098: E/IMGSRV(2467): :0: PVRDRMOpen: TP3, ret = 45
01-18 21:43:54.098: E/IMGSRV(2467): :0: PVRDRMOpen: TP3, ret = 46
01-18 21:43:54.098: E/IMGSRV(2467): :0: PVRDRMOpen: TP3, ret = 46
01-18 21:43:54.098: E/IMGSRV(2467): :0: PVRDRMOpen: TP3, ret = 46
01-18 21:43:54.108: E/IMGSRV(2467): :0: PVRDRMOpen: TP3, ret = 48
01-18 21:43:54.138: D/OpenGLRenderer(2467): Enabling debug mode 0

Answer 1

我了解到 android 应用程序正在服务器桌面上的模拟器中运行。所以首先你需要改变那个 LAN IP 192.168.x.x

Blockquote 使用 Android 模拟器时，您可能经常需要访问数据 使用 localhost 托管在本地 Web 服务器上。例如，您自己的 Web 服务 在开发过程中可能会托管在您的本地计算机上，并且您将 想在你用来编写 Android 的同一台开发机器上测试它们 应用程序。在这种情况下，您应该使用特殊 IP 地址 10.0.2.2（不是 127.0.0.1) 指主机的环回接口。来自安卓 从模拟器的角度来看，localhost(127.0.0.1)指的是它自己的环回接口。

引用自http://p2p.wrox.com/book-beginning-android-application-development-631/

如果 android 应用程序没有在服务器中运行，我猜你需要一些额外的行来避免错误：

serverAddress =
InetAddress.getByName(“192.168.1.142”);
//--remember to change the IP address above to match your own-- and also the port
socket = new Socket(serverAddress, 500);

我还假设您正在扩展 AsyncTask 类中。