Android 当我点击cityname时，这个城市的所有医院都会显示在listview中

我是android新手，正在学习Json

我有两个Web服务。。。。。。。。。。。。。。。。 在一项服务中，我有

city\u name

和

city\u id

，在另一项服务中，我有

Hospital\u name

和

Hospital\u id

现在，我的任务是首先以listview表单first webservice显示所有城市的列表 这就是我现在所做的

我的第二个任务是，当我点击第一个城市名称时，假设我点击了 纽约那么纽约的所有医院都应该在listview中显示。

我是否需要其他Web服务或其他服务

我只有两个Web服务。有可能从这两个方面做第二个任务吗 服务。请帮帮我

这是我在listview中显示来自第一个服务的cityname的代码

 public class CityNameActivity extends ListActivity{
ListView list;

private ProgressDialog pDialog;
// URL to get Cities JSON
private static String url = "http://14.140.200.186/Hospital/get_city.php";
// JSON Node names
private static final String TAG_CITIES = "Cities";
//private static final String TAG_ID = "id";
private static final String TAG_NAME = "city_name";
// Cities JSONArray
JSONArray Cities = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> citylist;
//ArrayList<String> citylist;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.cityname_activity_main);
    ListView listView=getListView();
    citylist = new ArrayList<HashMap<String, String>>();
  // list.setOnClickListener(this);
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

            Intent in = new Intent(getApplicationContext(),
                    Specialities_Activity.class);

            startActivity(in);}
        });
            new GetCities().execute();
        }
/**
 * Async task class to get json by making HTTP call
 * */
private class GetCities extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Showing progress dialog
        pDialog = new ProgressDialog(CityNameActivity.this);
        pDialog.setMessage("Please wait...");
        pDialog.setCancelable(false);
        pDialog.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // Creating service handler class instance
        ServiceHandler sh = new ServiceHandler();

        // Making a request to url and getting response
        String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);

        Log.d("Response: ", "> " + jsonStr);

        if (jsonStr != null) {
            try {
                JSONObject jsonObj = new JSONObject(jsonStr);

                // Getting JSON Array node
                Cities = jsonObj.getJSONArray(TAG_CITIES);

                // looping through All Cities
                for (int i = 0; i < Cities.length(); i++) {
                    JSONObject c = Cities.getJSONObject(i);

                    //String id = c.getString(TAG_ID);
                    String name = c.getString(TAG_NAME);
                    HashMap<String, String> Cities = new HashMap<String, String>();
                    Cities.put(TAG_NAME, name);


                    // adding contact to Cities list
                    citylist.add(Cities);


                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } else {
            Log.e("ServiceHandler", "Couldn't get any data from the url");
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result)
    {
        super.onPostExecute(result);
        // Dismiss the progress dialog
        if (pDialog.isShowing())
            pDialog.dismiss();
        /**`enter code here`
         * Updating parsed JSON data into ListView
         * */
        ListAdapter adapter = new SimpleAdapter(CityNameActivity.this, citylist, R.layout.city_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
        setListAdapter(adapter);




    }
}

公共类CityNameActivity扩展了ListActivity{
列表视图列表；
私人对话；
//获取城市JSON的URL
专用静态字符串url=”http://14.140.200.186/Hospital/get_city.php";
//JSON节点名称
私有静态最终字符串TAG_CITIES=“CITIES”；
//私有静态最终字符串标记\u ID=“ID”；
私有静态最终字符串TAG_NAME=“city_NAME”；
//杰索纳雷城市酒店
JSONArray Cities=null；
//ListView的Hashmap
ArrayList citylist；
//ArrayList citylist；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.cityname\u activity\u main）；
ListView ListView=getListView（）；
citylist=newarraylist（）；
//list.setOnClickListener（此）；
setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父级、视图、，
内部位置，长id）{
Intent in=新的Intent（getApplicationContext（），
专业（活动类）；
星触觉（in）；}
});
新建GetCities（）.execute（）；
}
/**
*异步任务类通过HTTP调用获取json
* */
私有类GetCities扩展异步任务{
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
//显示进度对话框
pDialog=newprogressdialog（CityNameActivity.this）；
setMessage（“请稍候…”）；
pDialog.setCancelable（假）；
pDialog.show（）；
}
@凌驾
受保护的Void doInBackground（Void…arg0）{
//创建服务处理程序类实例
ServiceHandler sh=新的ServiceHandler（）；
//向url发出请求并获得响应
字符串jsonStr=sh.makeServiceCall（url，ServiceHandler.GET）；
Log.d（“响应：”、“>”+jsonStr）；
if（jsonStr！=null）{
试一试{
JSONObject jsonObj=新的JSONObject（jsonStr）；
//获取JSON数组节点
Cities=jsonObj.getJSONArray（TAG_Cities）；
//环游所有城市
对于（int i=0；i

这是代码，我在其中显示第二服务的医院列表

   public class HospitalList_Activity extends ListActivity {
private ProgressDialog pDialog;
// URL to get Hospitals JSON
private static String url = "http://14.140.200.186/hospital/get_hospital.php";
// JSON Node names
private static final String TAG_HOSPITAL = "Hospitals";
//private static final String TAG_ID = "id";
private static final String TAG_NAME = "hospital_name";
// Hospitals JSONArray
JSONArray Hospitals = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> hospitallist;
//ArrayList<String> citylist;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_hospital_list_);
    ListView listView=getListView();
    hospitallist = new ArrayList<HashMap<String, String>>();
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

            Intent in = new Intent(getApplicationContext(), Specialities_Activity.class);
            startActivity(in);
        }
    });
    new GetHospitals().execute();
}
/**
 * Async task class to get json by making HTTP call
 * */
private class GetHospitals extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Showing progress dialog
        pDialog = new ProgressDialog(HospitalList_Activity.this);
        pDialog.setMessage("Please wait...");
        pDialog.setCancelable(false);
        pDialog.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // Creating service handler class instance
        ServiceHandler sh = new ServiceHandler();

        // Making a request to url and getting response
        String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);

        Log.d("Response: ", "> " + jsonStr);

        if (jsonStr != null) {
            try {
                JSONObject jsonObj = new JSONObject(jsonStr);

                // Getting JSON Array node
                Hospitals = jsonObj.getJSONArray(TAG_HOSPITAL);

                // looping through All Cities
                for (int i = 0; i < Hospitals.length(); i++) {
                    JSONObject c = Hospitals.getJSONObject(i);

                    //String id = c.getString(TAG_ID);
                    String name = c.getString(TAG_NAME);
                    HashMap<String, String> Hospitals = new HashMap<String, String>();
                    Hospitals.put(TAG_NAME, name);


                    // adding contact to Cities list
                    hospitallist.add(Hospitals);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } else {
            Log.e("ServiceHandler", "Couldn't get any data from the url");
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result)
    {
        super.onPostExecute(result);
        // Dismiss the progress dialog
        if (pDialog.isShowing())
            pDialog.dismiss();
        /**`enter code here`
         * Updating parsed JSON data into ListView
         * */
        ListAdapter adapter = new SimpleAdapter(HospitalList_Activity.this, hospitallist, R.layout.hospital_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
        setListAdapter(adapter);




    }
}

公共类HospitalList_活动扩展了ListActivity{
私人对话；
//获取JSON的URL
专用静态字符串url=”http://14.140.200.186/hospital/get_hospital.php";
//JSON节点名称
私人静态最终字符串TAG_HOSPITAL=“Hospitals”；
//私有静态最终字符串标记\u ID=“ID”；
私有静态最终字符串TAG_NAME=“hospital_NAME”；
//杰索纳雷医院
JSONArray医院=空；
//ListView的Hashmap
ArrayList医院医生；
//ArrayList citylist；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（右布局、活动、医院、列表）；
ListView ListView=getListView（）；
hospitallist=新ArrayList（）；
setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父级、视图、，
内部位置，长id）{
Intent in=新的Intent（getApplicationContext（），Specialities\u Activity.class）；
星触觉（in）；
}
});
新建GetHospitals（）.execute（）；
}
/**
*异步任务类通过HTTP调用获取json
* */
私有类GetAsyncTask{
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
//显示进度对话框
pDialog=新建进度对话框（HospitalList_Activity.this）；
setMessage（“请稍候…”）；
pDialog.setCancelable（假）；
pDialog.show（）；
}
@凌驾
受保护的Void doInBackground（Void…arg0）{
//创建服务处理程序类实例
ServiceHandler sh=新的ServiceHandler（）；
//请求
 public class CityNameActivity extends ListActivity{
ListView list;

private ProgressDialog pDialog;
// URL to get Cities JSON
private static String url = "http://14.140.200.186/Hospital/get_city.php";
// JSON Node names
private static final String TAG_CITIES = "Cities";
//private static final String TAG_ID = "id";
private static final String TAG_NAME = "city_name";
// Cities JSONArray
JSONArray Cities = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> citylist;
//ArrayList<String> citylist;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.cityname_activity_main);
    ListView listView=getListView();
    citylist = new ArrayList<HashMap<String, String>>();
  // list.setOnClickListener(this);
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

               String temp= citylist.get(position).get(TAG_ID);
         Intent in = new Intent(getApplicationContext(),
                Specialities_Activity.class);

        in.putExtra("city_id",temp);
        startActivity(in);}
        });
            new GetCities().execute();
        }
/**
 * Async task class to get json by making HTTP call
 * */
private class GetCities extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Showing progress dialog
        pDialog = new ProgressDialog(CityNameActivity.this);
        pDialog.setMessage("Please wait...");
        pDialog.setCancelable(false);
        pDialog.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // Creating service handler class instance
        ServiceHandler sh = new ServiceHandler();

        // Making a request to url and getting response
        String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);

        Log.d("Response: ", "> " + jsonStr);

        if (jsonStr != null) {
            try {
                JSONObject jsonObj = new JSONObject(jsonStr);

                // Getting JSON Array node
                Cities = jsonObj.getJSONArray(TAG_CITIES);

                // looping through All Cities
                for (int i = 0; i < Cities.length(); i++) {
                    JSONObject c = Cities.getJSONObject(i);

                    String id = c.getString(TAG_ID);
                    String name = c.getString(TAG_NAME);
                    HashMap<String, String> Cities = new HashMap<String, String>();

                    Cities.put(TAG_ID, id);

                    Cities.put(TAG_NAME, name);



                    // adding contact to Cities list
                    citylist.add(Cities);


                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } else {
            Log.e("ServiceHandler", "Couldn't get any data from the url");
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result)
    {
        super.onPostExecute(result);
        // Dismiss the progress dialog
        if (pDialog.isShowing())
            pDialog.dismiss();
        /**`enter code here`
         * Updating parsed JSON data into ListView
         * */
        ListAdapter adapter = new SimpleAdapter(CityNameActivity.this, citylist, R.layout.city_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
        setListAdapter(adapter);




    }
}

public class HospitalList_Activity extends ListActivity {
private ProgressDialog pDialog;
// URL to get Hospitals JSON
private static String url = "http://14.140.200.186/hospital/get_hospital.php";
// JSON Node names
private static final String TAG_HOSPITAL = "Hospitals";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "hospital_name";
private static final String TAG_CITY_ID = "city_id";

// Hospitals JSONArray
JSONArray Hospitals = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> hospitallist;
//ArrayList<String> citylist;

String cid;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_hospital_list_);
    ListView listView=getListView();

    Intent in=getIntent;
    cid= intent.getExtra("city_id");

    hospitallist = new ArrayList<HashMap<String, String>>();
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

            Intent in = new Intent(getApplicationContext(), Specialities_Activity.class);
            startActivity(in);
        }
    });
    new GetHospitals().execute();
}
/**
 * Async task class to get json by making HTTP call
 * */
private class GetHospitals extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Showing progress dialog
        pDialog = new ProgressDialog(HospitalList_Activity.this);
        pDialog.setMessage("Please wait...");
        pDialog.setCancelable(false);
        pDialog.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // Creating service handler class instance
        ServiceHandler sh = new ServiceHandler();

        // Making a request to url and getting response
        String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);

        Log.d("Response: ", "> " + jsonStr);

        if (jsonStr != null) {
            try {
                JSONObject jsonObj = new JSONObject(jsonStr);

                // Getting JSON Array node
                Hospitals = jsonObj.getJSONArray(TAG_HOSPITAL);

                // looping through All Cities
                for (int i = 0; i < Hospitals.length(); i++) {
                    JSONObject c = Hospitals.getJSONObject(i);

                    String id = c.getString(TAG_ID);
                    String name = c.getString(TAG_NAME);
                    String city_id = c.getString(TAG_CITY_ID);

                    HashMap<String, String> Hospitals = new HashMap<String, String>();

                    if(cid.equals(city_id)){                
                    Hospitals.put(TAG_NAME, name);
                     // adding contact to Cities list
                    hospitallist.add(Hospitals);
                     }



                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } else {
            Log.e("ServiceHandler", "Couldn't get any data from the url");
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result)
    {
        super.onPostExecute(result);
        // Dismiss the progress dialog
        if (pDialog.isShowing())
            pDialog.dismiss();
        /**`enter code here`
         * Updating parsed JSON data into ListView
         * */
        ListAdapter adapter = new SimpleAdapter(HospitalList_Activity.this, hospitallist, R.layout.hospital_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
        setListAdapter(adapter);




    }
}