知识点：

php: 处理json问题，unicode转码实现

android:ListView使用与性能优化；handler消息队列机制；androidHTTP请求，activity知识等等：

效果如下：

文件结构：

MainActivity主活动界面展示：

ListActivity 跳转活动界面展示ListView内容

Person 数据填充实体

PersonAdapter ListView数据接口

Util工具类，负责网络请求以及json解析等

Manifest文件：

<?xml version="1.0" encoding="utf-8"?>                                                                                                                                                            

主界面两个按钮功能：

点击按钮1获取textView里面的id，传递id参数，向服务器发起post请求；获取结果解析json,展示到按钮下面的显示TextView中

点击按钮2跳转到第二个意图，向服务器发起post请求，将结果填充到ListView中

服务端 api.php:

<?phpheader("Content-Type:application/json;charset=utf-8");$result = ["status" => 200,"msg" => "获取成功","result" => [       ["name"=>"zfeig","age"=>26,"address"=>"广州市天河区车陂天桥11号","study"=>["no"=>"0610832110","teacher"=>"李贤良"]],       ["name"=>"lisi","age"=>27,"address"=>"四川省成都市高新区226号","study"=>["no"=>"0610832110","teacher"=>"何洁"]],       ["name"=>"王大崔","age"=>25,"address"=>"浙江省杭州市西湖大道120号","study"=>["no"=>"0610732110","teacher"=>"刘德华"]],       ["name"=>"刘晓花","age"=>23,"address"=>"福建省厦门市厦门大学路13号","study"=>["no"=>"0610632110","teacher"=>"王明"]],       ["name"=>"lisi","age"=>27,"address"=>"四川省成都市高新区226号","study"=>["no"=>"0610832110","teacher"=>"何洁"]],       ["name"=>"王大崔","age"=>25,"address"=>"浙江省杭州市西湖大道120号","study"=>["no"=>"0610732110","teacher"=>"刘德华"]],       ["name"=>"刘晓花","age"=>23,"address"=>"福建省厦门市厦门大学路13号","study"=>["no"=>"0610632110","teacher"=>"王明"]]]];function encodeCN($result){foreach ($result as $k => $v) {if(is_array($v)){           $result[$k] = encodeCN($v);       }else{$result[$k] = urlencode($v);}}return $result;}$result = encodeCN($result);echo urldecode(json_encode($result));?>

package com.example.tes.api;import android.app.Activity;import android.app.ProgressDialog;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.ScrollView;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements View.OnClickListener {     private static EditText text;     private static Button btn;     private static Button listBtn;     private static TextView tv;     private static String info;     private static ProgressDialog pd;     private final String ADDR = "http://192.168.145.162:8000/api.php";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btn = (Button) findViewById(R.id.button);        listBtn = (Button) findViewById(R.id.button2);        tv = (TextView) findViewById(R.id.textView);        text = (EditText) findViewById(R.id.editText);        btn.setOnClickListener(this);        listBtn.setOnClickListener(this);    }    Handler hander = new Handler(){        @Override        public void handleMessage(Message msg) {            if(msg.what  == 1){                pd.dismiss();                info  = msg.obj.toString();                tv.setText(info);            }        }    };    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.button :                 String id =text.getText().toString();                if(id.equals(null) || id.equals("")){                    Toast.makeText(this,"请输入id号",Toast.LENGTH_LONG).show();                }else{                    pd = new ProgressDialog(MainActivity.this);                    pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);                    pd.setMessage("wait...");                    pd.show();                    final String Id = id;                    new Thread(){                        @Override                        public void run() {                            String msg =  Util.httpPost(ADDR,Integer.parseInt(Id));                            msg = Util.parseJson2String(msg);                            Util.sendMsg(hander,new Message(),msg);                        }                    }.start();                }                break;            case R.id.button2:                Intent it = new Intent(MainActivity.this,ListActivity.class);                startActivity(it);                break;        }    }}

package com.example.tes.api;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.ListView;import android.widget.Toast;import java.util.Iterator;import java.util.List;public class ListActivity extends Activity {    private static String ADDR ="http://192.168.145.162:8000/api.php";    private ListView lv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_list);        lv = (ListView) findViewById(R.id.listView);        initData();    }    Handler hander = new Handler(){        @Override        public void handleMessage(Message msg) {            if(msg.what  == 1){                List data = (List) msg.obj;                String info =  list2str(data);                Toast.makeText(ListActivity.this,"消息："+info, Toast.LENGTH_LONG).show();                lv.setAdapter(new PersonAdapter(data,ListActivity.this,R.layout.item));            }        }    };    public  void initData(){        new Thread(){            @Override            public void run() {                super.run();                String msg =  Util.httpPost(ADDR, 1);                List data = Util.parseJson2List(msg);                Util.sendMsg(hander, new Message(), data);            }        }.start();    }    public  String  list2str(List list){        StringBuilder sb = new StringBuilder();        Iterator it = list.iterator();        while(it.hasNext()){            Person pr = (Person) it.next();            String name =pr.getName();            int age =pr.getAge();            String address = pr.getAddress();            String no = pr.getNo();            String teacher =pr.getTeacher();            sb.append("姓名："+name+" ");            sb.append("年纪："+age+" ");            sb.append("地址："+address+" ");            sb.append("学号："+no+"\n");        }        return sb.toString();    }}

package com.example.tes.api;/** * Created by no1 on 2016/6/25. */public class Person {    private String name;    private int age;    private String address;    private String no;    private String teacher;    public Person(String name, int age, String address, String no, String teacher) {        this.name = name;        this.age = age;        this.address = address;        this.no = no;        this.teacher = teacher;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public String getNo() {        return no;    }    public void setNo(String no) {        this.no = no;    }    public String getTeacher() {        return teacher;    }    public void setTeacher(String teacher) {        this.teacher = teacher;    }}

PersonAdapter.java

package com.example.tes.api;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import java.util.List;public class PersonAdapter extends BaseAdapter {    private List data;    private static Context context;    private static int resoureId;    PersonAdapter(List data,Context context,int resoureId){        this.context = context;        this.data = data;        this.resoureId = resoureId;    }    @Override    public int getCount() {        return data.size();    }    @Override    public Object getItem(int position) {        return  data.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder viewHolder = null;        Person person = data.get(position);        if(convertView == null){            convertView = LayoutInflater.from(context).inflate(resoureId,null);//找到lv布局            viewHolder = new ViewHolder(convertView);//找到布局下面的组件并缓存起来            convertView.setTag(viewHolder);//缓存组件对象        }else{            viewHolder = (ViewHolder) convertView.getTag();//获取组件对象        }        //组件对象填充数据        viewHolder.name.setText(person.getName());        viewHolder.age.setText("年纪："+person.getAge()+"");        viewHolder.address.setText("家庭住址："+person.getAddress());        viewHolder.no.setText("学号："+person.getNo());        viewHolder.teacher.setText("班主任："+person.getTeacher());        return convertView;    }    public  class ViewHolder{        private TextView name;        private TextView age;        private TextView address;        private TextView no;        private TextView teacher;        ViewHolder(View contentView){            this.name = (TextView) contentView.findViewById(R.id.name);            this.age = (TextView) contentView.findViewById(R.id.age);            this.address = (TextView) contentView.findViewById(R.id.address);            this.no = (TextView) contentView.findViewById(R.id.no);            this.teacher = (TextView) contentView.findViewById(R.id.teacher);        }    }}

Util.java

package com.example.tes.api;import android.os.Handler;import android.os.Message;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.ArrayList;import java.util.List;public class Util {    /**     * @发送消息到消息队列中     * @param hander     * @param msg     * @param data     */    public static void sendMsg(Handler hander,Message msg,String data){        msg.what =1;        msg.obj = data;        hander.sendMessage(msg);    }    /**     * @发送消息到消息队列中     * @param hander     * @param msg     * @param data     */    public static void sendMsg(Handler hander,Message msg,List data){        msg.what =1;        msg.obj = data;        hander.sendMessage(msg);    }    /**     * @获取post请求     * @param url     * @param id     * @return     */    public static String httpPost(String url,int id){        String params = "act=1";        params = params +"&vid="+id;        String data = null;        HttpURLConnection conn = null;        try{            //get request            URL address = new URL(url);            conn = (HttpURLConnection) address.openConnection();            conn.setRequestMethod("POST");            conn.setRequestProperty("Content-type", "application/x-www-form-urlencoded");            conn.setRequestProperty("Content-Length", String.valueOf(params.getBytes().length));            conn.setDoInput(true);            conn.setDoOutput(true);            conn.getOutputStream().write(params.getBytes());//将参数写入输出流            //get outinput            StringBuilder sb = new StringBuilder();            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));            String msg = "";            while((msg = br.readLine())!=null){                sb.append(msg);            }            data = sb.toString();        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }finally {            if(conn != null){                conn.disconnect();            }        }        System.out.println("获取结果为：" + data);        return data;    }    /**     * @get请求     * @param url     * @return     */    public static String httpGet(String url){        String data = null;        HttpURLConnection conn = null;        try{            URL address = new URL(url);            conn = (HttpURLConnection) address.openConnection();            conn.setRequestMethod("GET");            conn.setDoInput(true);            StringBuilder sb = new StringBuilder();            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));            String msg = "";            while((msg = br.readLine())!=null){                sb.append(msg);            }            data = sb.toString();        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }finally {            if(conn != null){                conn.disconnect();            }        }        return data;    }    /**     * @解析json存为字符串     * @param data     * @return     */    public static String  parseJson2String(String data){        String result = "";        try{            JSONObject object = new JSONObject(data);            int status  = object.getInt("status");            if(status == 200){                JSONArray item = object.getJSONArray("result");              for(int i=0;i parseJson2List(String data){       List result = new ArrayList();        try{            JSONObject object = new JSONObject(data);            int status  = object.getInt("status");            if(status == 200){                JSONArray item = object.getJSONArray("result");                for(int i=0;i

<?xml version="1.0" encoding="utf-8"?>                                            

<?xml version="1.0" encoding="utf-8"?>        

<?xml version="1.0" encoding="utf-8"?>