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Я получаю аварию в случайном порядке. Я не знаю причину, потому что в отчете журнала не отображается номер строки. Я думаю, что получаю этот крах в списке.Ошибка в ListView
Я прикрепил этот список ниже относительного макета. И я устанавливаю видимость списка в соответствии с записями.
STACK_TRACE=java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setDrawingCacheBackgroundColor(int)' on a null object reference
at android.widget.AbsListView.obtainView(AbsListView.java:2357)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1270)
at android.widget.ListView.onMeasure(ListView.java:1182)
at android.view.View.measure(View.java:17430)
at android.widget.RelativeLayout.measureChild(RelativeLayout.java:697)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17430)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:727)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:463)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560)
at android.view.View.measure(View.java:17430)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Пожалуйста, помогите мне избавиться от этой аварии.
Код:
searchEt.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
if (s.toString().trim().length() > 0) {
placesTask = new PlacesTask();
placesTask.execute(s.toString());
}
}
});
private class ParserTask extends
AsyncTask<String, Integer, List<TextSearchPlace>> {
JSONObject jObject;
@Override
protected List<TextSearchPlace> doInBackground(String... jsonData) {
List<TextSearchPlace> places = null;
PlaceJSONParser placeJsonParser = new PlaceJSONParser(getActivity());
try {
jObject = new JSONObject(jsonData[0]);
places = placeJsonParser.parse(jObject);
} catch (Exception e) {
Log.d("Exception", e.toString());
}
return places;
}
@Override
protected void onPostExecute(List<TextSearchPlace> result) {
autocompletePlaces = result;
if (searchLayout.getVisibility() == View.VISIBLE) {
try {
if (result != null && result.size() > 0) {
rootView.findViewById(R.id.dummy_iv).setVisibility(
View.VISIBLE);
suggestionLv.setAdapter(new PlaceSuggestionListAdapter(
getActivity(), result));
suggestionLv.setVisibility(View.VISIBLE);
} else {
rootView.findViewById(R.id.dummy_iv).setVisibility(
View.GONE);
suggestionLv.setVisibility(View.GONE);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
Я показываю список, если я получаю результат и скрытие списка, если результат не найден.
Мой адаптер -
public class PlaceSuggestionListAdapter extends BaseAdapter {
Context mContext;
List<TextSearchPlace> places;
public PlaceSuggestionListAdapter(Context mContext,
List<TextSearchPlace> places) {
this.mContext = mContext;
this.places = places;
}
@Override
public int getCount() {
return places.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int pos, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (mContext != null) {
if (convertView == null) {
convertView = ((Activity) mContext).getLayoutInflater()
.inflate(R.layout.place_list_item, null);
holder = new ViewHolder();
holder.nameTv = (TextView) convertView
.findViewById(R.id.name_tv);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
UtilFunction.labelTypeFace(holder.nameTv, mContext.getAssets());
holder.nameTv.setText(places.get(pos).getName());
}
return convertView;
}
private static class ViewHolder {
public TextView nameTv;
}
}
'java.lang.NullPointerException: попытка вызвать виртуальный метод 'void android.view.View.setDrawingCacheBackgroundColor (int)' в ссылке на нулевой объект. Когда вы вызываете' setDrawingCacheBackgroundColor() 'в свой код? – shkschneider
Показать свой код ... – Piyush
Пожалуйста, разместите соответствующий код. – humblerookie