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내 애플리케이션에서 TabView를 만들고 AsyncTask를 사용하여 JSON 데이터를로드하고 있습니다. onTabChangedListner()를 사용하여 AsyncTask가 실행되는 perticular 탭을 클릭 할 때 JSON 데이터가로드됩니다. 그 Perticular 탭을 클릭하면 NullPointerException으로 끝나지 만, 내 응용 프로그램이 NullPointerException을 얻는 곳을 파악할 수 없습니다.TabActivity의 AsyncTask에서 Json 데이터로드 중 오류
The following is the code of TabGroups Class:
public class TabGroups extends ActivityGroup {
ArrayList<String> list;
Window window;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
if(list == null)
list = new ArrayList<String>();
}
@Override
public void finishFromChild(Activity child)
{
LocalActivityManager manager = getLocalActivityManager();
int index = list.size() -1;
if(index < 1)
{
finish();
return;
}
manager.destroyActivity(list.get(index), true);
list.remove(index);
index--;
String lastId = list.get(index);
Intent in = manager.getActivity(lastId).getIntent();
window = manager.startActivity(lastId, in);
setContentView(window.getDecorView());
}
public void startChildActivity(String Id, Intent intent)
{
window = getLocalActivityManager().startActivity(Id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
if(window != null)
{
list.add(Id);
setContentView(window.getDecorView());
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(keyCode == KeyEvent.KEYCODE_BACK)
return true;
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event)
{
if(keyCode == KeyEvent.KEYCODE_BACK)
{
onBackPressed();
return true;
}
return super.onKeyUp(keyCode, event);
}
@Override
public void onBackPressed()
{
int length = list.size();
if(length > 1)
{
Activity current = getLocalActivityManager().getActivity(list.get(length - 1));
current.finish();
}
}
}
The following is the code of TabView Class:
public class TabView extends TabActivity implements OnTabChangeListener {
private static TabHost tabHost;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.tabview);
tabHost = getTabHost();
tabHost.addTab(tabHost.newTabSpec("home").setIndicator("Home").setContent(new Intent(this, TabGroup1.class)));
tabHost.addTab(tabHost.newTabSpec("top5").setIndicator("My Top5").setContent(new Intent(this, TabGroup2.class)));
tabHost.addTab(tabHost.newTabSpec("resv").setIndicator("My Reservation").setContent(new Intent(this, TabGroup3.class)));
tabHost.addTab(tabHost.newTabSpec("srch").setIndicator("Search").setContent(new Intent(this, TabGroup4.class)));
tabHost.addTab(tabHost.newTabSpec("prfl").setIndicator("Profile").setContent(new Intent(this, TabGroup5.class)));
tabHost.setCurrentTab(0);
tabHost.setOnTabChangedListener(this);
}
public void onTabChanged(String tabId) {
// TODO Auto-generated method stub
Log.v("tag", String.valueOf(tabId));
if(tabId.equals("home"))
new LoadingScreen(this).execute("login");
}
}
The following is the code of TabGroup1 Class
public class TabGroup1 extends TabGroups {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
startChildActivity("Home", new Intent(this, Home.class));
}
}
The following is the code of LoadingScreen Class:
홈 클래스 만에서 onCreate를 (포함) 및 아무것도
The Errors that I am getting are:
The following is the code of JsonParser:
public class JsonParser {
static InputStream is;
static JSONObject jObj;
static String json = null;
public JSONObject getJSONfromUrl(String url)
{
try
{
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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));
StringBuilder sb = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
json = sb.toString();
}
catch(Exception e)
{
e.printStackTrace();
}
try
{
jObj = new JSONObject(json);
}
catch(JSONException e)
{
e.printStackTrace();
}
return jObj;
}
}
08-29 08:21:39.021: E/AndroidRuntime(4156): FATAL EXCEPTION: AsyncTask #1 08-29 08:21:39.021: E/AndroidRuntime(4156): java.lang.RuntimeException: An error occured while executing doInBackground() 08-29 08:21:39.021: E/AndroidRuntime(4156): at android.os.AsyncTask$3.done(AsyncTask.java:200) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.lang.Thread.run(Thread.java:1096) 08-29 08:21:39.021: E/AndroidRuntime(4156): Caused by: java.lang.NullPointerException 08-29 08:21:39.021: E/AndroidRuntime(4156): at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:112) 08-29 08:21:39.021: E/AndroidRuntime(4156): at org.json.JSONTokener.nextValue(JSONTokener.java:90) 08-29 08:21:39.021: E/AndroidRuntime(4156): at org.json.JSONObject.<init>(JSONObject.java:154) 08-29 08:21:39.021: E/AndroidRuntime(4156): at org.json.JSONObject.<init>(JSONObject.java:171) 08-29 08:21:39.021: E/AndroidRuntime(4156): at com.pnf.gogolf.JsonParser.getJSONfromUrl(JsonParser.java:65) 08-29 08:21:39.021: E/AndroidRuntime(4156): at com.pnf.gogolf.LoadingScreen.doInBackground(LoadingScreen.java:48) 08-29 08:21:39.021: E/AndroidRuntime(4156): at com.pnf.gogolf.LoadingScreen.doInBackground(LoadingScreen.java:1) 08-29 08:21:39.021: E/AndroidRuntime(4156): at android.os.AsyncTask$2.call(AsyncTask.java:185) 08-29 08:21:39.021: E/AndroidRuntime(4156): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 08-29 08:21:39.021: E/AndroidRuntime(4156): ... 4 more 08-29 08:21:40.052: E/WindowManager(4156): Activity com.pnf.gogolf.TabView has leaked window [email protected] that was originally added here 08-29 08:21:40.052: E/WindowManager(4156): android.view.WindowLeaked: Activity com.pnf.gogolf.TabView has leaked window [email protected] that was originally added here 08-29 08:21:40.052: E/WindowManager(4156): at android.view.ViewRoot.<init>(ViewRoot.java:247) 08-29 08:21:40.052: E/WindowManager(4156): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 08-29 08:21:40.052: E/WindowManager(4156): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 08-29 08:21:40.052: E/WindowManager(4156): at android.view.Window$LocalWindowManager.addView(Window.java:424) 08-29 08:21:40.052: E/WindowManager(4156): at android.app.Dialog.show(Dialog.java:241) 08-29 08:21:40.052: E/WindowManager(4156): at com.pnf.gogolf.LoadingScreen.onPreExecute(LoadingScreen.java:37) 08-29 08:21:40.052: E/WindowManager(4156): at android.os.AsyncTask.execute(AsyncTask.java:391) 08-29 08:21:40.052: E/WindowManager(4156): at com.pnf.gogolf.TabView.onTabChanged(TabView.java:34) 08-29 08:21:40.052: E/WindowManager(4156): at android.widget.TabHost.invokeOnTabChangeListener(TabHost.java:356) 08-29 08:21:40.052: E/WindowManager(4156): at android.widget.TabHost.setCurrentTab(TabHost.java:341) 08-29 08:21:40.052: E/WindowManager(4156): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129) 08-29 08:21:40.052: E/WindowManager(4156): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453) 08-29 08:21:40.052: E/WindowManager(4156): at android.view.View.performClick(View.java:2408) 08-29 08:21:40.052: E/WindowManager(4156): at android.view.View$PerformClick.run(View.java:8816) 08-29 08:21:40.052: E/WindowManager(4156): at android.os.Handler.handleCallback(Handler.java:587) 08-29 08:21:40.052: E/WindowManager(4156): at android.os.Handler.dispatchMessage(Handler.java:92) 08-29 08:21:40.052: E/WindowManager(4156): at android.os.Looper.loop(Looper.java:123) 08-29 08:21:40.052: E/WindowManager(4156): at android.app.ActivityThread.main(ActivityThread.java:4627) 08-29 08:21:40.052: E/WindowManager(4156): at java.lang.reflect.Method.invokeNative(Native Method) 08-29 08:21:40.052: E/WindowManager(4156): at java.lang.reflect.Method.invoke(Method.java:521) 08-29 08:21:40.052: E/WindowManager(4156): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 08-29 08:21:40.052: E/WindowManager(4156): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 08-29 08:21:40.052: E/WindowManager(4156): at dalvik.system.NativeStart.main(Native Method) 탭을 사용하여 신청서를 다시 디자인해야하므로 도와주세요 ..
미리 감사드립니다.