У меня проблема с DialogFragment
.Исключение null null указателя диалога DialogFragment
Я удалил весь свой код и сделал DialogFragment
максимально простым, и он действительно работает при вызове с MainActivity
. Это код:
DatePickerFragment
:
public class DatePickerFragment extends DialogFragment
{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View rootView = inflater.inflate(R.layout.fragment_sample_dialog, container, false);
getDialog().setTitle("Simple Dialog");
return rootView;
}
}
Вызов из MainActivity
:
public void showDialog
{
FragmentManager fm = getFragmentManager();
DatePickerFragment dialogFragment = new DatePickerFragment();
dialogFragment.show(fm, "Sample Fragment");
}
Но, если я называю showDialog
из класса ActivityStarter
, который имеет ссылку на MainActivity
, это ошибка, которую я получаю:
java.lang.NullPointerException
at android.widget.AbsListView.obtainView(AbsListView.java:2353)
at android.widget.ListView.makeAndAddView(ListView.java:1812)
at android.widget.ListView.fillDown(ListView.java:698)
at android.widget.ListView.fillSpecific(ListView.java:1359)
at android.widget.ListView.layoutChildren(ListView.java:1623)
at android.widget.AbsListView.onLayout(AbsListView.java:2149)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1160)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15125)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2323)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2029)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1192)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6231)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
at android.view.Choreographer.doCallbacks(Choreographer.java:591)
at android.view.Choreographer.doFrame(Choreographer.java:560)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
at dalvik.system.NativeStart.main(Native Method)
Я действительно застрял и не могу найти решение. Любая помощь будет оценена по достоинству.
Когда создается ActivityStarter? Вы возвращаете null в любом из createView в любом из классов? – Bajji
MainActivity -> onCreate -> ActivityStarter activityStarter = new ActivityStarter(); Все остальное работает из 'activityStarter', единственная проблема, с которой я столкнулся, заключается в вызове' showDialog'. Я не возвращаю null. – marco
Можете ли вы опубликовать фрагмент кода, в котором вы вызываете DialogFragment из класса ActivityStarter? – ucsunil