android 利用socket 发送Json数据demo
2018-07-20 来源：open-open
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：
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：
if(server==null){
server=new ServerSocket(8155);
}
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