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我想從PHP MySql中填充Spinner。當我運行應用程序時，它獲得org.json.JSONException: Value Category_code of type java.lang.String cannot be converted to JSONObject。字符串無法在Android中轉換爲JSON對象
有人可以幫助我如何做到這一點。
這裏是我的代碼
public class Customer_Order_Detail extends Activity
{
private ArrayList<Category> categoriesList;
ProgressDialog pDialog;
Spinner spinnerCategory;
// Url to get all categories
private String URL_CATEGORIES = "http://192.168.1.102/client_vendor_mgmt/category_master.php";
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.customer_order);
categoriesList = new ArrayList<Category>();
spinnerCategory = (Spinner)findViewById(R.id.spinnerCategory);
new GetCategories().execute();
}
/**
* Adding spinner data
* */
private void populateSpinner() {
List<String> lables = new ArrayList<String>();
for (int i = 0; i < categoriesList.size(); i++)
{
lables.add(categoriesList.get(i).getName());
}
// Creating adapter for spinner
ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, lables);
// Drop down layout style - list view with radio button
spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinnerCategory.setAdapter(spinnerAdapter);
}
/*
* Async task to get all categories
*/
private class GetCategories extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Customer_Order_Detail.this);
pDialog.setMessage("Fetching categories..");
pDialog.setCancelable(false);
pDialog.show();
}
//org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.1.102 refused
@Override
protected Void doInBackground(Void... arg0) {
ServiceHandler jsonParser = new ServiceHandler();
String json = jsonParser.makeServiceCall(URL_CATEGORIES, ServiceHandler.GET);
Log.e("Response: ", " > " + json);
if (json != null) {
try
{
JSONObject jsonObj = new JSONObject(json);
if (jsonObj != null)
{
JSONArray categories = jsonObj.getJSONArray("category_master");
for (int i = 0; i < categories.length(); i++)
{
JSONObject catObj = (JSONObject) categories.get(i);
Category cat = new Category(catObj.getInt("cat_id"),catObj.getString("cat_name"));
categoriesList.add(cat);
}
}
}
catch (JSONException e)
{
e.printStackTrace();
}
}
else
{
Log.e("JSON Data", "Didn't receive any data from server!");
}
return null;
}
@Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
populateSpinner();
}
}
}
這是我的日誌貓信息
08-28 16:39:17.854: E/Response:(531): Category_code:--ELEC1Category_nameElectronics
08-28 16:39:17.917: W/System.err(531): org.json.JSONException: Value Category_code of type java.lang.String cannot be converted to JSONObject
08-28 16:39:17.964: W/System.err(531): at org.json.JSON.typeMismatch(JSON.java:107)
08-28 16:39:17.964: W/System.err(531): at org.json.JSONObject.<init>(JSONObject.java:158)
08-28 16:39:17.964: W/System.err(531): at org.json.JSONObject.<init>(JSONObject.java:171)
08-28 16:39:17.964: W/System.err(531): at com.customer.demo.Customer_Order_Detail$GetCategories.doInBackground(Customer_Order_Detail.java:91)
08-28 16:39:17.974: W/System.err(531): at com.customer.demo.Customer_Order_Detail$GetCategories.doInBackground(Customer_Order_Detail.java:1)
08-28 16:39:17.984: W/System.err(531): at android.os.AsyncTask$2.call(AsyncTask.java:185)
08-28 16:39:17.984: W/System.err(531): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
08-28 16:39:17.984: W/System.err(531): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
08-28 16:39:17.984: W/System.err(531): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
08-28 16:39:17.984: W/System.err(531): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
08-28 16:39:17.994: W/System.err(531): at java.lang.Thread.run(Thread.java:1019)
這裏是我的ServiceHandeller
public class ServiceHandler {
static InputStream is = null;
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
/*
* Making service call
* @url - url to make request
* @method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/*
* Making service call
* @url - url to make request
* @method - http request method
* @params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
// appending params to url
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
response = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error: " + e.toString());
}
return response;
}
}
可以發佈服務器的響應？ – 2014-08-28 11:28:38
@ Michael Shrestha - 類別代碼： - ELEC1Category_nameElectronics。這是來自服務器的響應。 – tazeen 2014-08-28 11:34:39
發佈'Log.e（「Response：」，「>」+ json）;'你的logcat。 – GrIsHu 2014-08-28 11:34:50