Question

我需要通过国际防止母婴传播方案与服务器连接。我发现,如何做到这一点,但例子没有形成永久联系,只是把数据发送,并缩小了联系。我需要离开这一联系,以收回和提出几个包裹。

例如,我用来要求联系,然后开展一个过程,听取新数据。与此类似:

Connect
Acknowledge connection
Send data
Receive data ... go back to #3
Close the connection.

我是否可以读到这部或比较好的样本法?

Answer 1

我以不同用途提出了类似的申请,只有服务器方面没有听力,只有发送。然而,它确实在 lo中敞开大门,在接到具体信息后,你可以加以修改,在 lo期间使用强硬的指挥手段关闭通道和连接。见这个专题:。用于编码的WiFi TCP链接中的垃圾数据,从桌面到,并改行:

n = write(newsockfd, string, sizeof(string));

纽约总部

n = write(newsockfd, string, strlen(string));

in order 纽约总部fix the issue I was having.

Answer 2

从现在起(ICS+),为了建立网络联系,除非你愿意取消限制,否则你将需要使用AyncTask(或手递)。网络连接因缺省而受主要活动的限制。

页: 1 任务确实是trick(在另一个方面,即拥有一台电脑服务器)。在此情况下,一开始计票,发出指示,表明一是从主要活动收到的,收到答复,发出另一信息(当时是“在那里”),并在关闭联系之前收到最后信息。

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import android.os.AsyncTask;
import android.util.Log;

public class SocketConnect extends AsyncTask <String, Integer, String> {

    String TAG = "TGsocket";

    @Override
    protected String doInBackground(String... params) {
        String url = params[0];
        String textSend = params[1];
        Log.i(TAG, "textsend = |" + textSend + "|");
        Socket socket = null;
        DataOutputStream dataOutputStream = null;
        DataInputStream dataInputStream = null;
        try {
            socket = new Socket(url, 9090);
            dataOutputStream = new DataOutputStream(socket.getOutputStream());
            dataInputStream = new DataInputStream(socket.getInputStream());
            Log.i(TAG,"socket OK");
            dataOutputStream.writeUTF(textSend);
            String textInNow = dataInputStream.readLine();
            Log.w(TAG, "says Server = " + textInNow);
            dataOutputStream.writeUTF("hello there");
            textInNow = dataInputStream.readLine();
            Log.w(TAG, "says 2ndTime Server = " + textInNow);
        } catch (UnknownHostException e) {
            Log.e(TAG, "at thread unknownHost " + e.getMessage());
            e.printStackTrace();
        } catch (IOException e) {
            Log.e(TAG, "at thread IO " + e.getMessage());
            e.printStackTrace();
        }

        finally{
            Log.i(TAG, "finally");
            if (dataOutputStream != null){
                try {
                    dataOutputStream.close();
                } catch (IOException e) {
                    Log.e(TAG, "at thread dataoutput IO " + e.getMessage());
                    e.printStackTrace();
                }
            }

            if (dataInputStream != null){
                try {
                    dataInputStream.close();
                } catch (IOException e) {
                    Log.e(TAG, "at thread datainput IO " + e.getMessage());
                    e.printStackTrace();
                }
            }
            if (socket != null){
                try {
                    Log.i(TAG, "socket closed");
                    socket.close();
                } catch (IOException e) {
                    Log.e(TAG, "at thread finally IO " + e.getMessage());
                    e.printStackTrace();
                }
            }
        }
        return null;
    }
       @Override
       protected void onPreExecute() {
          super.onPreExecute();
          //displayProgressBar("Downloading...");
       }
    @Override
       protected void onProgressUpdate(Integer... values) {
          super.onProgressUpdate(values);
          //updateProgressBar(values[0]);
       }

       @Override
       protected void onPostExecute(String result) {
          super.onPostExecute(result);
       }
}

使用电话(在试捕中):

SocketConnect("100.100.100.100","some string");

“100.100.100”是你的服务器IP。

NOTE1: do not forget to set permissions for internet use (in your manifest file) NOTE2: you can safely strip away the Log calls and most of the checks, as well as the 3 final overrides (i just left it all there because it makes it easier, in some cases, to build upon).

在froyo、gingerbread、ics和jb试验。

Answer 3

你们是否应该选择像“Apache MINA”或“Netty”等更高级别的图书馆?

友情链接