多行ListAdapter，使用ListActivity

Question

我遇到了我的Android应用程序的问题。我想要做的是从JSON API解析数据，然后使用ListActivity将收集的数据放入多行列表中。但是，我似乎无法让它工作。我试过Googeling的解决方案，但我找不到任何人使用与我相同的方法。

任何人谁可以向我解释我如何能得到这个工作？

PubsActivity.java：

public class PubsActivity extends ListActivity implements OnItemClickListener, MyCallbackInterface{ 

private static String url = "http://api.fatkoll.se/json/1.0/getPlaces.json?api_key=fd6950b1499b71037ec3c5a5e01081d6&city_id="; 


static String TAG_LIST = "list"; 
static String TAG_ID = "id"; 
static String TAG_NAME = "name"; 
static String TAG_ADDRESS = "address"; 
static String TAG_OPEN_HOURS = "openhours"; 
static String TAG_LAT = "lat"; 
static String TAG_LNG = "lng"; 

private static String address; 
private static String openhours; 
private static String lat; 
private static String lng; 

private ArrayList<String> info = new ArrayList<String>(); 
int[] toId = new int[] {R.id.listName ,R.id.listAddress}; 
private ArrayList<String> pubIds = new ArrayList<String>(); 

JSONArray list = null; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_pubs); 

    Intent getCityId = getIntent(); 
    String cityId = getCityId.getExtras().getString("cityId"); 

    JSONparser parser = new JSONparser(this);  
    parser.execute(url); 

} 



@Override 
public void onRequestComplete(JSONObject result) { 

    JSONObject json = result; 

    try { 

     list = json.getJSONArray(TAG_LIST); 
     Log.e("onRequestComplete", "Fått JSONArray"); 


     for (int i = 0; i < list.length(); i++){ 
      JSONObject c = list.getJSONObject(i); 
      Log.e("onRequestComplete", list.getString(i)); 
      pubIds.add(c.getString(TAG_ID)); 
      info.add(c.getString(TAG_NAME)); 
      info.add(c.getString(TAG_ADDRESS)); 
      openhours = c.getString(TAG_OPEN_HOURS); 
      lat = c.getString(TAG_LAT); 
      lng = c.getString(TAG_LNG); 

     } 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, info); 
    Log.e("onRequestComplete", "Skapar ArrayAdapter"); 
    setListAdapter(adapter); 
    Log.e("onRequestComplete", "Sätter ListAdapter"); 
    ListView lv = getListView(); 
    lv.setOnItemClickListener(this); 

JSONparser.java：

package se.mima.jeda.frsa.krogrunda; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.os.AsyncTask; 
import android.util.Log; 

public class JSONparser extends AsyncTask<String, Void, JSONObject> { 

// Initializing variables 

static InputStream is = null; 
static JSONObject jObj = null; 
static String json = ""; 

public interface MyCallbackInterface { 
    public void onRequestComplete(JSONObject result); 
} 

private MyCallbackInterface mCallback; 

public JSONparser(MyCallbackInterface callback) { 
    mCallback = callback; 
} 

public JSONObject getJSONFromUrl(String url) { 

    // Make a HTTP request 
    try { 
     // Creating a DefaultHttpClient 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     // skapar en HttpPost 
     HttpPost httpPost = new HttpPost(url); 

     HttpResponse httpResponse = httpClient.execute(httpPost); 
     HttpEntity httpEntity = httpResponse.getEntity(); 
     is = httpEntity.getContent(); 

     // Catching exceptions 
    } catch (UnsupportedEncodingException e) { 
     e.printStackTrace(); 
    } catch (ClientProtocolException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    // BufferedReader reads the data gathered from the API 
    try { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       is, "UTF-8"), 8000); 
     StringBuilder sb = new StringBuilder(); 
     String line = null; 
     while ((line = reader.readLine()) != null) { 
      sb.append(line + "\n"); 
     } 
     is.close(); 
     json = sb.toString(); 
    } catch (Exception e) { 
     Log.e("Buffer Error", "Error converting result " + e.toString()); 
    } 

    // Trying to parse a JSONObject from a String 
    try { 
     jObj = new JSONObject(json); 
    } catch (JSONException e) { 
     Log.e("JSON Parser", "Error parsing data " + e.toString()); 
    } 

    // Return JSONObject 
    return jObj; 
} 

@Override 
protected JSONObject doInBackground(String... params) { 
    String url = params[0]; 
    return getJSONFromUrl(url); 
} 

@Override 
protected void onPostExecute(JSONObject result) { 
    mCallback.onRequestComplete(result); 
} 

} 

Answer 1

我认为你应该使用自己的BaseAdapter（见谷歌的例子List 14这里）为您的数据。目前您正在显示列表中交替显示的每个列表条目的“名称”和“地址”，因为您正在将此数据存储到一个ArrayList中。使用BaseAdapter，您可以将自己的自定义数据对象放入列表适配器中，并且可以自由地将其显示在列表中。