解析

TrainLogic

package com.example.traindemo.util;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.http.client.ClientProtocolException;
import org.json.JSONException;
public class TrainLogic {
 
 public List<Train> Train() throws ClientProtocolException, IOException,
   JSONException {
  Map<String, String> map = new HashMap<String, String>();
  map.put("date", "2015-06-28");
  map.put("to", "合肥");
  map.put("from", "上海");
  map.put("key", "838a236170cd3df22298a27c45334193");
  
  String str = HttpUtil.getRequest("yp", map);
//  System.out.println("str---"+str);
  List<Train> requst = JsonActivity.getTrain(str);
  // Log.i("Test", requst+"");
//  System.out.println(requst + "");
  return requst;
 }
}

JsonActivity

package com.example.traindemo.util;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class JsonActivity {
 public static List<Train> getTrain(String str) throws JSONException {
  List<Train> arr = new ArrayList<Train>();
  Train t = null;
  JSONObject obj = new JSONObject(str);
  JSONArray list = obj.getJSONArray("result");
  for (int i = 0; i < list.length(); i++) {
   JSONObject jb = list.getJSONObject(i);
   String train_no = jb.getString("train_no");
   
   String start_station_name = jb.getString("start_station_name");
   String end_station_name = jb.getString("end_station_name");
   String from_station_name = jb.getString("from_station_name");
   String to_station_name = jb.getString("to_station_name");
   String start_time = jb.getString("start_time");
   String arrive_time = jb.getString("arrive_time");
   String train_class_name = jb.getString("train_class_name");
   String day_difference = jb.getString("day_difference");
   String lishi = jb.getString("lishi");
   String gr_num = jb.getString("gr_num");
   String qt_num = jb.getString("qt_num");
   String rw_num = jb.getString("rw_num");
   String rz_num = jb.getString("rz_num");
   String tz_num = jb.getString("tz_num");
   String wz_num = jb.getString("wz_num");
   String yw_num = jb.getString("yw_num");
   String yz_num = jb.getString("yz_num");
   String ze_num = jb.getString("ze_num");
   String zy_num = jb.getString("zy_num");
   String swz_num = jb.getString("swz_num");
   
   t = new Train(train_no, start_station_name, end_station_name,
     from_station_name, to_station_name, start_time,
     arrive_time, train_class_name, day_difference, lishi,
     gr_num, qt_num, rw_num, rz_num, tz_num, wz_num, yw_num,
     yz_num, ze_num, zy_num, swz_num);
   
   arr.add(t);
  }
//  System.out.println("arr---"+arr);
  
  return arr;
 }
}

HttpUtil

package com.example.traindemo.util;
import java.io.IOException;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
public class HttpUtil {
 public static HttpClient client = new DefaultHttpClient();
 public static String getRequest(String url, Map<String, String> params)
   throws ClientProtocolException, IOException {
  StringBuffer sb = new StringBuffer();
  String result = "";
  sb.append("http://apis.juhe.cn/train/");
  sb.append(url);
  if (params != null) {
   sb.append("?");
   for (Map.Entry<String, String> entry : params.entrySet()) {
    String key = entry.getKey();
    String value = entry.getValue();
    sb.append(key + "=" + value + "&");
   }
  }
  // 刪除最後的"&"
  sb.delete(sb.length() - 1, sb.length());
  // 發送GET請求
  HttpGet get = new HttpGet(sb.toString());
  HttpResponse response = client.execute(get);
  HttpEntity entity = response.getEntity();
  result = EntityUtils.toString(entity);
  return result;
 }
}

MyHttpClient

package com.activity.Util;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
public class MyHttpClient {
 private static HttpClient mHttpClient;
 public static synchronized HttpClient getHttpClient() {
  if (mHttpClient == null) {
   HttpParams params = new BasicHttpParams();
   ConnManagerParams.setTimeout(params, 5000);
   HttpConnectionParams.setConnectionTimeout(params, 5000);
   HttpConnectionParams.setSoTimeout(params, 10000);
   SchemeRegistry schReg = new SchemeRegistry();
   schReg.register(new Scheme("http", PlainSocketFactory
     .getSocketFactory(), 80));
   schReg.register(new Scheme("https", SSLSocketFactory
     .getSocketFactory(), 443));
   ClientConnectionManager conMgr = new ThreadSafeClientConnManager(
     params, schReg);
   mHttpClient = (HttpClient) new DefaultHttpClient(conMgr, params);
  }
  return mHttpClient;
 }
}

activity_main.xml

 <LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity" >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="出發站：" />
        <EditText
            android:id="@+id/editText_start"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10" >
            <requestFocus />
        </EditText>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp" >
        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="終點站：" />
        <EditText
            android:id="@+id/editText_end"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10" />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp" >
        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="日   期：" />
        <TextView
            android:id="@+id/textView_date"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="日期"
            android:inputType="date" />
    </LinearLayout>
    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="車次類型：" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <CheckBox
            android:id="@+id/checkBox_G"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="G" />
        <CheckBox
            android:id="@+id/checkBox_D"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="D" />
        <CheckBox
            android:id="@+id/checkBox_T"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="T" />
        <CheckBox
            android:id="@+id/checkBox_Z"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Z" />
        <CheckBox
            android:id="@+id/checkBox_K"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="K" />
        <CheckBox
            android:id="@+id/checkBox_Q"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Q" />
    </LinearLayout>
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="Button" />
</LinearLayout>