大家好，我不知道为什么，但我收到了这个错误：JSONArray cannot be converted to JSONObject。
我告诉你我的代码！我希望你能帮助我！大家先谢谢大家！
抱歉，我是JSON的新手。
主要活动：
public class MainActivity extends AppCompatActivity {
private String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
private ListView lv;
// URL to get contacts JSON
private static String url = " http://v1.tvguideapi.com/programs?channels[]=2161&channels[]=2162&start=1484598600&stop=1484605799";
//private static String url = "http://api.androidhive.info/contacts/";
ArrayList<HashMap<String, String>> contactList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList = new ArrayList<>();
lv = (ListView) findViewById(R.id.list);
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(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
//JSONObject jsonObj = new JSONObject(jsonStr);
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
JSONArray contacts = jsonObj.getJSONArray("programs");
// JSONArray contacts = jsonObj.getJSONArray("contacts");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
/* String id = c.getString("id");
String name = c.getString("name");
String email = c.getString("email");
String address = c.getString("address");
String gender = c.getString("gender");
// Phone node is JSON Object
JSONObject phone = c.getJSONObject("phone");
String mobile = phone.getString("mobile");
String home = phone.getString("home");
String office = phone.getString("office");*/
String title=c.getString("title");
// tmp hash map for single contact
HashMap<String, String> contact = new HashMap<>();
// adding each child node to HashMap key => value
/* contact.put("id", id);
contact.put("name", name);
contact.put("email", email);
contact.put("mobile", mobile);*/
contact.put("title",title);
// adding contact to contact list
contactList.add(contact);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
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(
/* MainActivity.this, contactList,
R.layout.list_item, new String[]{"name", "email",
"mobile"}, new int[]{R.id.name,
R.id.email, R.id.mobile});*/
MainActivity.this, contactList,
R.layout.list_item, new String[]{"title"}, new int[]{R.id.title});
lv.setAdapter(adapter);
}
}
}
JSON：
[
{
"id": "18879971",
"start": "2017-01-16 20:20:00",
"stop": "2017-01-16 22:30:00",
"lang": "",
"title": "Il Collegio</td>",
"subtitle": "",
"description": "",
"category": "",
"channel_id": "2162",
"icon": null,
"ts_start": 1484598000,
"ts_stop": 1484605800
},
{
"id": "18879856",
"start": "2017-01-16 20:25:00",
"stop": "2017-01-16 22:40:00",
"lang": "",
"title": "I Bastardi di Pizzofalcone",
"subtitle": "",
"description": "Ep.3 - In un fatiscente condominio di Pizzofalcone viene rinvenuto il cadavere di una camariera. Le indagini della squadra portano al marito della donna, ma per Lojacono il caso si complica ulteriormente.",
"category": "",
"channel_id": "2161",
"icon": null,
"ts_start": 1484598300,
"ts_stop": 1484606400
}
]
答案 0 :(得分：1)
你应该使用Json Array。
你有[{}，{}]格式这里[]显示JsonArray和{}这是json对象。
你可以让Json数组循环遍历数组并获取Json对象。
JSONArray contacts = new JSONArray(jsonStr);
而不是使用
JSONObject jsonObj = new JSONObject(jsonStr);
现在您可以获取数据
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
//Get all required data using c.
String id = c.getString("id");
String name = c.getString("start");
}