[2015/05/08] 最简单的服务器 - 安卓通信

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仅作记录用，毫无技术含量。

我得记得把json相关的资料给转载一下，等上完微机课= =

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2015/05/08 创建，仅从jsp页面读取。

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服务器端程序（连的CMCC-EDU, 服务器访问地址 http://10.50.21.213:8080/HttpConnect/）

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Hi, Android</title></head><body color="cyan">This is a jsp file to connect to Android App.<hr><form action="Result.jsp" method="post"><table><tr><td>用户名：</td><td><input type="text"  name="username" value=""></td></tr><tr><td>密码：</td><td><input type="password" name="password" value=""></td></tr></table><br><input type="submit" name="submit" value="提交"></form></body></html>

Result.jsp（注释还没写完，但是没时间了……）

<%@page import="com.google.gson.Gson"%><%@page import="java.util.HashMap"%><%@page import="java.util.Map"%><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%    //在lib中导入了一个json生成的jar包Gson    Gson gson = new Gson();     Map<String, Object> mapt = new HashMap<String, Object>();        //获取username和password（这个参数是从安卓传过去的）        String username = request.getParameter("username");    String password = request.getParameter("password");    mapt.put("username", username);    mapt.put("password", password);    Map<String,Object>map=new HashMap<String,Object>();    map.put("user",mapt);    String result = gson.toJson(map);    System.out.println(result);    out.append(result);      %>

安卓端程序

布局文件 activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.sutdy.MainActivity" ><ScrollView    android:layout_width="300dp"    android:layout_height="1000dp"    android:layout_toLeftOf="@+id/post" >       <LinearLayout      android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">                <TextView        android:layout_width="280dp"        android:layout_height="wrap_content"        android:id="@+id/text"        android:text="@string/test"/>             </LinearLayout>    </ScrollView>  <Button      android:id="@+id/get"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_alignParentRight="true"      android:layout_alignParentTop="true"      android:layout_marginTop="14dp"      android:text="GET" />    <Button        android:id="@+id/post"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignRight="@+id/get"        android:layout_below="@+id/get"        android:layout_marginTop="15dp"        android:text="POST" /></RelativeLayout>

MainActivity.java（是的，我发现我的包名………………………………我没资格嘲笑人家！）

package com.sutdy;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import android.app.Activity;import android.os.Bundle;import android.os.StrictMode;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity {private Button buttonget,buttonpost;private TextView textView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initWidgets();        initStrictMode();        buttonget.setOnClickListener(new OnClickListener() {public void onClick(View v) {try{        //通过该IP地址实例化HttpGet对象        HttpGet httpGet=new HttpGet("http://www.baidu.com");        //实现HttpClient接口        HttpClient httpClient=new DefaultHttpClient();        //声明一个HttpResponse对象        HttpResponse hResponse;        //执行Get请求        hResponse=httpClient.execute(httpGet);        if(hResponse.getStatusLine().getStatusCode()==200){       //连接成功                //得到HttpEntity对象并将其转换为String类        String strResult=EntityUtils.toString(hResponse.getEntity());        //显示HttpEntity        textView.setText(strResult);        }        }catch(ClientProtocolException e){        e.printStackTrace();        }catch (IOException e) {        e.printStackTrace();}        }});                   buttonpost.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//HttpPost连接对象HttpPost hPost=new HttpPost("http://10.50.21.213:8080/HttpConnect/Result.jsp");//使用NameValuePair保存要传递的POST参数List<NameValuePair> params=new ArrayList<NameValuePair>();//添加要传递的POST参数params.add(new BasicNameValuePair("username", "zhizhi"));params.add(new BasicNameValuePair("password", "zhizhi19950801"));try{//设置字符集HttpEntity httpEntity=new UrlEncodedFormEntity(params,"utf-8");//请求HttpRequesthPost.setEntity(httpEntity);//取得默认的HttpClientHttpClient httpClient=new DefaultHttpClient();//声明HttpResponseHttpResponse httpResponse;//获取HttpResponsehttpResponse=httpClient.execute(hPost);//连接成功if (httpResponse.getStatusLine().getStatusCode()==200){//获取返回的信息String resultString=EntityUtils.toString(httpResponse.getEntity());//str返回的是一个标准的json格式String str=new String(resultString.getBytes("utf-8"),"utf-8");//由于这次的str是单个数据的json，所以调用parseJson否则调用parseJsonMulti//方法自带输出parseJson(str);//显示返回的信息//textView.setText(str);}}catch(Exception e){e.printStackTrace();}}});    }/** * 设置线程政策，防止抛出异常 */    private void initStrictMode() {        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()        .detectDiskReads()        .detectDiskReads()        .detectNetwork()        .build());                //设置虚拟内存政策        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()        .detectLeakedSqlLiteObjects()        .detectLeakedClosableObjects()        .penaltyLog()        .penaltyDeath()        .build());        }    /** * 初始化控件，并获取相应id */private void initWidgets() {// TODO Auto-generated method stubbuttonget=(Button)findViewById(R.id.get);buttonpost=(Button)findViewById(R.id.post);textView=(TextView)findViewById(R.id.text);}/** * 解析单个Json格式 * @param strResult */private void parseJson(String strResult) {         try {         //JSON对象格式构造器，从strResult中获得主键"user"            JSONObject jsonObj = new             JSONObject(strResult).getJSONObject("user");             //获取user的username            String username = jsonObj.getString("username");             //获取user的password            String password = jsonObj.getString("password");                         //设置文本格式            textView.setText("用户名："+username + "，密码：" + password);         } catch (JSONException e) {             System.out.println("Json parse error");             e.printStackTrace();         }    }/** * 解析多个数据的Json（即有数组格式） * @param strResult */    private void parseJsonMulti(String strResult) {         try {         //JSON数组格式构造器，从strResult中获得主键"user"            JSONArray jsonObjs = new             JSONObject(strResult).getJSONArray("user");             //初始化最终显示结果s            String s = "";             //循环，将数组的值放入s中            for(int i = 0; i < jsonObjs.length() ; i++){                 JSONObject jsonObj = ((JSONObject)jsonObjs.opt(i))                 .getJSONObject("user");                String username = jsonObj.getString("username");                 String password = jsonObj.getString("password");                 s +=  "用户名：" + username + "，密码：" + password ;             }             textView.setText(s);         } catch (JSONException e) {             System.out.println("Jsons parse error !");             e.printStackTrace();         }     }     }

运行结果如下：

[2015/05/08] 我去上微机课了先酱！好多需要完善的！

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