android 利用socket 发送Json数据demo，androidjson,客户端代码： p

android 利用socket 发送Json数据demo，androidjson,客户端代码： p

客户端代码：

    package com.yqq.jsonclienttest;      import java.io.IOException;      import java.io.OutputStream;      import java.net.InetAddress;      import java.net.Socket;      import java.net.UnknownHostException;      import org.json.JSONException;      import org.json.JSONObject;      import android.app.Activity;      import android.os.Bundle;      import android.text.TextUtils;      import android.util.Log;      import android.view.View;      import android.widget.EditText;      import android.widget.Toast;      /**      * 套接字客户端，      * 1、先生成JSON对象      * 2、将JSON对象转成JSON字符串      * 3、将JSON字符串转成字节数组写入套接字输出流      * @author yqq_coder      *      */      public class MainActivity extends Activity {          private EditText et_name;          private EditText et_age;          private EditText et_sex;          private String host="172.21.133.15";//同一个局域网内作为服务端的手机的IP，使用端口8155          @Override          protected void onCreate(Bundle savedInstanceState) {              super.onCreate(savedInstanceState);              setContentView(R.layout.activity_main);              et_name=(EditText) findViewById(R.id.et_name);              et_age=(EditText) findViewById(R.id.et_age);              et_sex=(EditText) findViewById(R.id.et_sex);          }          public void submit(View v) throws JSONException{              if(TextUtils.isEmpty(et_name.getText().toString().trim())||TextUtils.isEmpty(et_age.getText().toString().trim())||TextUtils.isEmpty(et_sex.getText().toString().trim())){                  Toast.makeText(MainActivity.this, "信息不能为空!!!", 0).show();                  return;              }              JSONObject jsonObject=new JSONObject();              jsonObject.put("name", et_name.getText().toString().trim());              jsonObject.put("age", et_age.getText().toString().trim());              jsonObject.put("sex", et_sex.getText().toString().trim());              final String  result=jsonObject.toString();              Log.i("jSON字符串", result);              new Thread(new  Runnable() {                  @Override                  public void run() {                      try {                          Socket socket=new Socket(InetAddress.getByName(host), 8155);                          OutputStream os=socket.getOutputStream();                          os.write(result.getBytes());                          os.flush();                          //防止服务端read方法读阻塞                          socket.shutdownOutput();                      } catch (UnknownHostException e) {                          // TODO Auto-generated catch block                          e.printStackTrace();                      } catch (IOException e) {                          // TODO Auto-generated catch block                          e.printStackTrace();                      }                  }              }).start();          }      }  

服务端代码：```java package com.yqq.jsonclienttest1;

import java.io.ByteArrayOutputStream;  import java.io.IOException;  import java.io.InputStream;  import java.io.OutputStream;  import java.net.InetAddress;  import java.net.ServerSocket;  import java.net.Socket;  import java.net.UnknownHostException;import org.json.JSONException;  import org.json.JSONObject;import com.yqq.jsonclienttest1.R;import android.app.Activity;  import android.os.Bundle;  import android.os.Handler;  import android.os.Looper;  import android.os.Message;  import android.text.TextUtils;  import android.util.Log;  import android.view.View;  import android.widget.Button;  import android.widget.EditText;  import android.widget.Toast;/**  * 套接字服务端  * @author yqq_coder  *  */  public class MainActivity extends Activity {      private Button btn;        volatile Socket   mSocket;        ServerSocket server;      private Handler mHandler=new Handler(){        @Override          public void handleMessage(Message msg) {              // TODO Auto-generated method stub              super.handleMessage(msg);              if(msg.what==0x01){                  Toast.makeText(MainActivity.this,(String) msg.obj, 500).show();                  btn.setEnabled(true);              }              if(msg.what==0x02){                  new Thread(new  Runnable() {                      @Override                      public void run() {                        try {                               Log.i("客户端连接", "读取客户端发来的数据");                              InputStream ins=mSocket.getInputStream();                              ByteArrayOutputStream os=new ByteArrayOutputStream();                              int len=0;                              byte[] buffer=new byte[1024];                              while((len=ins.read(buffer))!=-1){                                  os.write(buffer);                              }                              //第一步，生成Json字符串格式的JSON对象                              JSONObject jsonObject=new JSONObject(os.toString());                              //第二步，从JSON对象中取值如果JSON 对象较多，可以用json数组                              String name="姓名："+jsonObject.getString("name");                              String age="年龄："+jsonObject.getString("age");                              String sex="性别："+jsonObject.getString("sex");                              StringBuffer sb=new StringBuffer();                              sb.append(name);                              sb.append(age);                              sb.append(sex);                              Looper.prepare();                              Message message=Message.obtain();                              message.what=0X01;                              message.obj=sb.toString();                              mHandler.sendMessage(message);                              Looper.loop();                        } catch (Exception e) {                              // TODO Auto-generated catch block                              e.printStackTrace();                          }finally{                            if(mSocket!=null){                                  try {                                      mSocket.close();                                      mSocket=null;                                  } catch (IOException e) {                                      // TODO Auto-generated catch block                                      e.printStackTrace();                                  }                            }                          }                    }                  }).start();              }        }    };      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          btn=(Button) findViewById(R.id.btn);    }    public void submit(View v) throws JSONException, IOException{          btn.setEnabled(false);        new Thread(new  Runnable() {            @Override              public void run() {                    try {                           Log.i("阻塞，等待客户端连接", "<<<<<<<<<");                           if(server==null){                           server=new ServerSocket(8155);                           }                           mSocket=server.accept();                           Log.i("客户端连接成功", "<<<<<<<<<客户端连接成功");                          Looper.prepare();                          Message message=Message.obtain();                          message.what=0X02;                          mHandler.sendMessage(message);                          Looper.loop();                    } catch (Exception e) {                          // TODO Auto-generated catch block                          e.printStackTrace();                      }            }          }).start();      }}

 第二次监听时候报错：  04-28 12:55:52.841: W/System.err(8761): java.net.BindException: bind failed:  解决办法： ```java    if(server==null){                           server=new ServerSocket(8155);                           }