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我正在开发一个读取JSON数据的应用程序。 Json数据被解析，但它不在列表视图中查看。 Logcat说关于类型不匹配。我在Json中并不那么熟悉。
http://api.openweathermap.org/data/2.5/forecast/daily?lat=6.421465&lon=81.332396&cnt=10&mode=jsonJSON数据被读取但不能转换为JSONArray
这是我的logcat和代码。请用这个来麻烦我。
org.json.JSONException：索引1超出范围[0..1） org.json.JSONArray.get（JSONArray.java:263） org.json.JSONArray.getString（JSONArray.java ：421） com.is.parsej.ParseJ $ GetContacts.doInBackground（ParseJ.java:141） com.is.parsej.ParseJ $ GetContacts.doInBackground（ParseJ.java:1） android.os.AsyncTask $ 2.call （AsyncTask.java:287） java.util.concurrent.FutureTask.run（FutureTask.java:234） android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:230） java.util.concurrent.ThreadPoolExecutor中.runWorker（ThreadPoolExecutor.java:1080）
public class ParseJ extends ListActivity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://api.openweathermap.org/data/2.5/forecast/daily?lat=6.421465&lon=81.332396&cnt=10&mode=json";
// JSON Node names
private static final String TAG_COd = "list"; //edited
private static final String TAG_ID = "dt"; //edited
private static final String TAG_WEATHER = "weather";
private static final String TAG_MAIN = "main";
private static final String TAG_DESC = "description";
private static final String TAG_TEMP = "temp";
private static final String TAG_DAY = "day";
private static final String TAG_MIN = "min";
private static final String TAG_MAX = "max";
private static final String TAG_NIGHT = "night";
private static final String TAG_MORN= "morn";
private static final String TAG_HUMIDITY = "humidity";
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_parse_j);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String weather = ((TextView) view.findViewById(R.id.main))
.getText().toString();
String Temp = ((TextView) view.findViewById(R.id.Descrption))
.getText().toString();
String Humidity = ((TextView) view.findViewById(R.id.temp))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_WEATHER, weather);
in.putExtra(TAG_TEMP, Temp);
in.putExtra(TAG_HUMIDITY, Humidity);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(ParseJ.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
contacts = jsonObj.getJSONArray(TAG_COd);
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
String id = c.getString(TAG_ID);
String humidity = c.getString(TAG_HUMIDITY);
// Phone node is JSON Object
JSONObject temp = c.getJSONObject(TAG_TEMP);
String day = temp.getString(TAG_DAY);
String maxTemp = temp.getString(TAG_MAX);
String minTemp = temp.getString(TAG_MIN);
String morningTemp = temp.getString(TAG_MORN);
//edited
JSONArray weather = c.getJSONArray(TAG_WEATHER);
String main = weather.getString(1);
String desc = weather.getString(2);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(TAG_ID, id);
contact.put(TAG_DAY, day);
contact.put(TAG_DESC, desc);
contact.put(TAG_HUMIDITY, humidity);
// adding contact to contact list
contactList.add(contact);
}
} 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();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
ParseJ.this, contactList,
R.layout.list_item, new String[] { TAG_DAY, TAG_DESC,
TAG_HUMIDITY }, new int[] { R.id.temp,
R.id.main, R.id.Descrption });
setListAdapter(adapter);
}
}
}
检查数据是否有效JSONArray或没有...在JSONArray初始化之前记录您的数据......... – 2014-09-05 05:36:39
是的，整个数据传递给LogCat。之后只发生这种异常。 – Isuru 2014-09-05 05:38:11