检索 Json 数组
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【中文标题】检索 Json 数组【英文标题】：Retrieving Json Array 【发布时间】：2011-02-14 03:27:24 【问题描述】：我正在尝试从以下网址检索值：http://rentopoly.com/ajax.php?query=Bo。我想将所有建议的值一一显示在列表视图中。这就是我想要做的......
public class AlertsAdd
public ArrayList <JSONObject> retrieveJSONArray(String urlString)
String result = queryRESTurl(urlString);
ArrayList <JSONObject> ALERTS = new ArrayList <JSONObject> ();
if (result != null)
try
JSONObject json = new JSONObject(result);
JSONArray alertsArray = json.getJSONArray("suggestions");
for (int a = 0; a < alertsArray.length(); a++)
JSONObject alertitem = alertsArray.getJSONObject(a);
ALERTS.add(alertitem);
return ALERTS;
catch (JSONException e)
Log.e("JSON", "There was an error parsing the JSON", e);
JSONObject myObject = new JSONObject();
try
myObject.put("suggestions", myObject.getJSONArray("suggestions"));
ALERTS.add(myObject);
catch (JSONException e1)
Log.e("JSON", "There was an error creating the JSONObject", e1);
return ALERTS;
private String queryRESTurl(String url)
// URLConnection connection;
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
HttpResponse response;
try
response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null)
InputStream instream = entity.getContent();
String result = convertStreamToString(instream);
instream.close();
return result;
catch (ClientProtocolException e)
Log.e("REST", "There was a protocol based error", e);
catch (IOException e)
Log.e("REST", "There was an IO Stream related error", e);
return null;
/**
* To convert the InputStream to String we use the
* BufferedReader.readLine() method. We iterate until the BufferedReader
* return null which means there's no more data to read. Each line will
* appended to a StringBuilder and returned as String.
*/
private String convertStreamToString(InputStream is)
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try
while ((line = reader.readLine()) != null)
sb.append(line + "\n");
catch (IOException e)
e.printStackTrace();
finally
try
is.close();
catch (IOException e)
e.printStackTrace();
return sb.toString();
这是适配器代码...
public class AlertsAdapter extends ArrayAdapter <JSONObject>
public AlertsAdapter(Activity activity, List <JSONObject> alerts)
super(activity, 0, alerts);
@Override
public View getView(int position, View convertView, ViewGroup parent)
Activity activity = (Activity) getContext();
LayoutInflater inflater = activity.getLayoutInflater();
View rowView = inflater.inflate(R.layout.list_text, null);
JSONObject imageAndText = getItem(position);
TextView textView = (TextView) rowView.findViewById(R.id.last_build_stat);
try
textView.setText((String) imageAndText.get("suggestions"));
catch (JSONException e)
textView.setText("JSON Exception");
return rowView;
这是日志...
04-30 13:09:46.656: INFO/ActivityManager(584): Starting activity: Intent act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.WorldToyota/.Alerts
04-30 13:09:50.417: ERROR/JSON(924): There was an error parsing the JSON
04-30 13:09:50.417: ERROR/JSON(924): org.json.JSONException: JSONArray[0] is not a JSONObject.
04-30 13:09:50.417: ERROR/JSON(924): at org.json.JSONArray.getJSONObject(JSONArray.java:268)
04-30 13:09:50.417: ERROR/JSON(924): at com.WorldToyota.AlertsAdd.retrieveJSONArray(AlertsAdd.java:30)
04-30 13:09:50.417: ERROR/JSON(924): at com.WorldToyota.Alerts.onCreate(Alerts.java:20)
04-30 13:09:50.417: ERROR/JSON(924): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
04-30 13:09:50.417: ERROR/JSON(924): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
04-30 13:09:50.417: ERROR/JSON(924): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417)
04-30 13:09:50.417: ERROR/JSON(924): at android.app.ActivityThread.access$2100(ActivityThread.java:116)
04-30 13:09:50.417: ERROR/JSON(924): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
04-30 13:09:50.417: ERROR/JSON(924): at android.os.Handler.dispatchMessage(Handler.java:99)
04-30 13:09:50.417: ERROR/JSON(924): at android.os.Looper.loop(Looper.java:123)
04-30 13:09:50.417: ERROR/JSON(924): at android.app.ActivityThread.main(ActivityThread.java:4203)
04-30 13:09:50.417: ERROR/JSON(924): at java.lang.reflect.Method.invokeNative(Native Method)
04-30 13:09:50.417: ERROR/JSON(924): at java.lang.reflect.Method.invoke(Method.java:521)
04-30 13:09:50.417: ERROR/JSON(924): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
04-30 13:09:50.417: ERROR/JSON(924): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
04-30 13:09:50.417: ERROR/JSON(924): at dalvik.system.NativeStart.main(Native Method)
04-30 13:09:50.688: ERROR/JSON(924): There was an error creating the JSONObject
04-30 13:09:50.688: ERROR/JSON(924): org.json.JSONException: JSONObject["suggestions"] not found.
04-30 13:09:50.688: ERROR/JSON(924): at org.json.JSONObject.get(JSONObject.java:287)
04-30 13:09:50.688: ERROR/JSON(924): at org.json.JSONObject.getJSONArray(JSONObject.java:362)
04-30 13:09:50.688: ERROR/JSON(924): at com.WorldToyota.AlertsAdd.retrieveJSONArray(AlertsAdd.java:41)
04-30 13:09:50.688: ERROR/JSON(924): at com.WorldToyota.Alerts.onCreate(Alerts.java:20)
04-30 13:09:50.688: ERROR/JSON(924): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
04-30 13:09:50.688: ERROR/JSON(924): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
04-30 13:09:50.688: ERROR/JSON(924): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417)
04-30 13:09:50.688: ERROR/JSON(924): at android.app.ActivityThread.access$2100(ActivityThread.java:116)
04-30 13:09:50.688: ERROR/JSON(924): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
04-30 13:09:50.688: ERROR/JSON(924): at android.os.Handler.dispatchMessage(Handler.java:99)
04-30 13:09:50.688: ERROR/JSON(924): at android.os.Looper.loop(Looper.java:123)
04-30 13:09:50.688: ERROR/JSON(924): at android.app.ActivityThread.main(ActivityThread.java:4203)
04-30 13:09:50.688: ERROR/JSON(924): at java.lang.reflect.Method.invokeNative(Native Method)
04-30 13:09:50.688: ERROR/JSON(924): at java.lang.reflect.Method.invoke(Method.java:521)
04-30 13:09:50.688: ERROR/JSON(924): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
04-30 13:09:50.688: ERROR/JSON(924): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
04-30 13:09:50.688: ERROR/JSON(924): at dalvik.system.NativeStart.main(Native Method)
请帮我解析这个脚本并以列表格式显示值....
【问题讨论】：
你的“json”变量返回了什么？你能调试代码并告诉我们 json.toString() 的内容是什么吗？ json 变量正在返回 JSON 格式的 url 的全部内容... 【参考方案1】：查看此示例 - 使用您尝试访问的相同服务，并且也基于 Android。
http://damonsk.com/2010/01/jsonarray-httpclient-android/
【讨论】：
【参考方案2】：您需要首先从您获得的字符串中获取 JSONArray。然后访问特定对象。以下是可用于获取建议数组的代码：
String result = queryRESTurl(urlString);
JSONArray array = new JSONArray( result );
JSONObject object = array.getJSONObject( 0 );
JSONArray alertsArray = object.getJSONArray( "suggestions" );
【讨论】：
当我实施你的方法时，重点不会超出“JSONArray array = new JSONArray(result);”我试图显示日志，但它没有用。无法将“结果”初始化为数组...我仍在修复中...帮帮我... 检查你在结果字符串中得到了什么。 另一个问题可能是您指定建议字符串的格式。我认为，它应该采用以下格式：“建议”：[“Bognor Regis”，“Bolton”，...]【参考方案3】：查看 JSON 对象：
"query": "Bo",
"suggestions": ["Bognor Regis", "Bolton", ... ]
在我看来，建议 [0] 不是 JSONObject ("an unordered collection of name/value pairs")，因此出现了错误。它是一个普通的字符串。试试：
String alertitem = alertsArray.getString(a);
【讨论】：
【参考方案4】： public static ArrayList<Sport_Teamdetail_dto> getSport_TeamDetail(String id)
ArrayList<Sport_Teamdetail_dto> fetchSport_TeamDetail = new ArrayList<Sport_Teamdetail_dto>();
String result = "";
InputStream is = null;
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("id", id));
try
// http post
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url + "fetch_allsportdata.php?");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
// http Get
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
is = httpResponse.getEntity().getContent();
catch (Exception e)
Log.e("log_tag", "Error in http connection " + e.toString());
// convert response to string
try
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
sb.append(line + "\n");
is.close();
result = sb.toString();
catch (Exception e)
Log.e("log_tag", "Error converting result " + e.toString());
// parse json data
try
JSONObject json_obj = new JSONObject(result);
JSONArray j_Arr_sco_id = json_obj.getJSONArray("scid");
JSONArray j_Arr_tn = json_obj.getJSONArray("Teamname");
JSONArray j_Arr_vn = json_obj.getJSONArray("Venuename");
JSONArray j_Arr_cenr = json_obj.getJSONArray("Centerreference");
JSONArray j_Arr_ref1 = json_obj.getJSONArray("Referee1");
JSONArray j_Arr_ref2 = json_obj.getJSONArray("Referee2");
for (int i = 0; i < j_Arr_tn.length(); i++)
Sport_Teamdetail_dto sportteamdto = new Sport_Teamdetail_dto();
sportteamdto.sport_scocer_id = j_Arr_sco_id.getString(i);
sportteamdto.sports_team_teamname = j_Arr_tn.getString(i);
sportteamdto.sports_venue_name_all = j_Arr_vn.getString(i);
sportteamdto.sports_centerreff_name_teamnm = j_Arr_cenr
.getDouble(i);
sportteamdto.sports_ref1_name_team_nm = j_Arr_ref1.getDouble(i);
sportteamdto.sports_ref2_name_teamnm = j_Arr_ref2.getDouble(i);
fetchSport_TeamDetail.add(sportteamdto);
catch (JSONException e)
Log.e("log_tag", "Error parsing data " + e.toString());
return fetchSport_TeamDetail;
public class ItemListAdapterFindStore extends ArrayAdapter<ComanWord>
Context context1;
private HashMap<Integer, Boolean> mSelection = new HashMap<Integer, Boolean>();
/**
* Constructor from a list of items
*/
public ItemListAdapterFindStore(Context context, ArrayList<ComanWord> items)
super(context, 0, items);
li = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
context1 = context;
@Override
public View getView(final int position, View convertView, ViewGroup parent)
// The item we want to get the view for
// --
final ComanWord item = getItem(position);
// Re-use the view if possible
// --
final ViewHolder holder;
if (convertView == null)
convertView = li.inflate(R.layout.list_item_card, null);
holder = new ViewHolder(convertView);
convertView.setTag(R.id.holder, holder);
else
holder = (ViewHolder) convertView.getTag(R.id.holder);
holder.m_text1.setText(item.getEnglish());
holder.m_text2.setText(item.getHindi());
if (item.getGujarati() != null && item.getGujarati() != "")
holder.m_text3.setText(item.getGujarati());
if(item.getFavflag() ==0)
holder.img_audio1.setImageResource(R.drawable.apptheme_rate_star_small_off_holo_light);
else
holder.img_audio1.setImageResource(R.drawable.apptheme_rate_star_small_on_holo_light);
RelativeLayout rel = (RelativeLayout) convertView
.findViewById(R.id.rel_box);
// rel.setBackgroundColor(v.getResources().getColor(R.color.bacground));
if (mSelection.get(position) != null)
rel.setBackgroundColor(convertView.getResources().getColor(
R.color.actionbarcolor1));// this is a selected position so
// make it red
else
rel.setBackgroundColor(convertView.getResources().getColor(
R.color.white));
holder.img.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
// TODO Auto-generated method stub
Log.i("fb", "AMIT::" + item.getEnglish().toString());
PlanetFragment.speakOut(item.getEnglish().toString());
);
holder.img_audio1.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
if(item.getFavflag() ==0)
holder.img_audio1.setImageResource(R.drawable.apptheme_rate_star_small_on_holo_light);
else
holder.img_audio1.setImageResource(R.drawable.apptheme_rate_star_small_off_holo_light);
PlanetFragment.test(position);
);
return convertView;
@Override
public long getItemId(int position)
return position;
@Override
public boolean hasStableIds()
return true;
private LayoutInflater li;
private static class ViewHolder
public ViewHolder(View m_rootView)
m_text1 = (TextView) m_rootView.findViewById(R.id.text1);
m_text2 = (TextView) m_rootView.findViewById(R.id.text2);
m_text3 = (TextView) m_rootView.findViewById(R.id.text3);
img = (ImageView) m_rootView.findViewById(R.id.img_audio);
img_audio1 = (ImageView) m_rootView.findViewById(R.id.img_audio1);
m_text2.setTypeface(MainActivity.fonth);
m_text3.setTypeface(MainActivity.fontg);
private TextView m_text1;
private TextView m_text2;
private TextView m_text3;
private ImageView img, img_audio1;
public void setNewSelection(int position, boolean value)
mSelection.put(position, value);
notifyDataSetChanged();
public boolean isPositionChecked(int position)
Boolean result = mSelection.get(position);
return result == null ? false : result;
public Set<Integer> getCurrentCheckedPosition()
return mSelection.keySet();
public void removeSelection(int position)
CommonWordApp.words = "";
mSelection.remove(position);
notifyDataSetChanged();
public void clearSelection()
CommonWordApp.words = "";
mSelection = new HashMap<Integer, Boolean>();
notifyDataSetChanged();
【讨论】：
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