2
저는 Android 개발자에게 상당히 익숙하며 웹 사이트에서 일부 JSON을 구문 분석하고 ListView에 출력하는 프로그램을 작성하려고합니다.JSON 구문 분석 오류 (Android)
05-24 05:37:41.524: E/JSON Parser(783): Error parsing data org.json.JSONException: Value <?xml of type java.lang.String cannot be converted to JSONArray
도 내 JSON 페이지에서 XML 헤더가있을 것 같지 않기 때문에, 정말 이상한 : 내 프로그램을 실행할 때, 나는 오류가 발생합니다. whitespacing가 끔찍,
[{"codeField":"COMPSCI 101","semesterField":"Summer School; Semester 1; Semester 2","titleField":"Principles of Programming"},{"codeField":"COMPSCI 105","semesterField":"Summer School; Semester 1; Semester 2","titleField":"Principles of Computer Science"},{"codeField":"COMPSCI 111\/111G","semesterField":"Summer School; Semester 1; Semester 2","titleField":"Mastering Cyberspace: An Introduction to Practical Computing"},{"codeField":"COMPSCI 210","semesterField":"Semester 1; Semester 2","titleField":"Computer Systems 1"},{"codeField":"COMPSCI 215","semesterField":"Semester 2","titleField":"Computer Systems 2"},{"codeField":"COMPSCI 220","semesterField":"Semester 2","titleField":"Algorithms and data structures"},{"codeField":"COMPSCI 225","semesterField":"Semester 1; Semester 2","titleField":"Discrete Structures in Mathematics and Computer Science"},{"codeField":"COMPSCI 230","semesterField":"Semester 1","titleField":"Software Design and Construction"},{"codeField":"COMPSCI 230","semesterField":"Semester 2","titleField":"Software Construction"}]
알아,하지만 내가 바꿀 수없는 외부 소스입니다 : 내가 구문 분석하는 데 노력하고있어 JSON이다. JSONParser 클래스에서
public class AndroidJSONParsingActivity extends ListActivity {
private static String url = "http://redsox.tcs.auckland.ac.nz/734A/CSService.svc/courses";
private static final String TAG_CODE = "codeField";
private static final String TAG_SEMESTER = "semesterField";
private static final String TAG_TITLE = "titleField";
JSONArray courses = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Hashmap for ListView
ArrayList<HashMap<String, String>> courseList = new ArrayList<HashMap<String, String>>();
JSONParser jParser = new JSONParser();
courses = jParser.getJSONfromURL(url);
try {
for(int i = 0; i < courses.length(); i++){
JSONObject c = courses.getJSONObject(i);
// Storing each json item in variable
String code = c.getString(TAG_CODE);
String semester = c.getString(TAG_SEMESTER);
String title = c.getString(TAG_TITLE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_CODE, code);
map.put(TAG_SEMESTER, semester);
map.put(TAG_TITLE, title);
// adding HashList to ArrayList
courseList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
//Updating parsed JSON data into ListView
ListAdapter adapter = new SimpleAdapter(this, courseList,
R.layout.list_item,
new String[] { TAG_CODE, TAG_SEMESTER, TAG_TITLE }, new int[] {
R.id.code, R.id.semester, R.id.title });
setListAdapter(adapter);
:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
static JSONArray jArray = null;
public JSONParser() {
}
public JSONArray getJSONfromURL(String url) {
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity 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, "iso-8859-1"), 8);
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());
}
// return JSON String
try {
jArray = new JSONArray(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
return jArray;
}
}
편집 :
내 코드 : 주요 활동에서
전체 로그 캣은 다음과 같습니다에만
05-24 06:48:55.347: D/dalvikvm(787): GC_CONCURRENT freed 68K, 8% free 2736K/2948K, paused 6ms+34ms, total 115ms
05-24 06:48:55.547: E/JSON Parser(787): Error parsing data org.json.JSONException: Value <?xml of type java.lang.String cannot be converted to JSONArray
05-24 06:48:55.547: D/AndroidRuntime(787): Shutting down VM
05-24 06:48:55.547: W/dalvikvm(787): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-24 06:48:55.577: E/AndroidRuntime(787): FATAL EXCEPTION: main
05-24 06:48:55.577: E/AndroidRuntime(787): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.jsonparsing/com.androidhive.jsonparsing.AndroidJSONParsingActivity}: java.lang.NullPointerException
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.os.Handler.dispatchMessage(Handler.java:99)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.os.Looper.loop(Looper.java:137)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.ActivityThread.main(ActivityThread.java:5041)
05-24 06:48:55.577: E/AndroidRuntime(787): at java.lang.reflect.Method.invokeNative(Native Method)
05-24 06:48:55.577: E/AndroidRuntime(787): at java.lang.reflect.Method.invoke(Method.java:511)
05-24 06:48:55.577: E/AndroidRuntime(787): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-24 06:48:55.577: E/AndroidRuntime(787): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-24 06:48:55.577: E/AndroidRuntime(787): at dalvik.system.NativeStart.main(Native Method)
05-24 06:48:55.577: E/AndroidRuntime(787): Caused by: java.lang.NullPointerException
05-24 06:48:55.577: E/AndroidRuntime(787): at com.androidhive.jsonparsing.AndroidJSONParsingActivity.onCreate(AndroidJSONParsingActivity.java:44)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.Activity.performCreate(Activity.java:5104)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-24 06:48:55.577: E/AndroidRuntime(787): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
05-24 06:48:55.577: E/AndroidRuntime(787): ... 11 more
URL을 가져 오는 중입니까? – Nezam
위에서 설명한 JSON 응답이 웹에서 얻은 완전하고 정확한 응답이 아닙니다. 나는 태그로 덮여 있는지 100 % 확신합니다. 여기에 완전한 응답을 게시하십시오. –
@ PareshMayani. 내가 답변을 삭제했지만, 사람도 채팅에 대한 의미는 이러한 질문의 이유를 질문해야 !! – Nezam