У меня есть AsyncTask, в котором я создаю ViewPager, и когда я назначаю ему адаптер, эта ошибка появляется
java.lang.IllegalStateException: ViewPager с адаптером com.example.kos.PagerAdapterZvon@ 646addd требуется идентификатор представления в androidx.fragment.app.FragmentPagerAdapter.startUpdate (FragmentPagerAdapter.java:83) в androidx.viewpager.widget.ViewPager.populate (ViewPager.java:1124) в androidx.viewpager.widget.ulatePager(ViewPager.java:1092) в androidx.viewpager.widget.ViewPager.onMeasure (ViewPager.java:1622) в android.view.View.measure (View.java:23466) в android.view.ViewGroup.measureChildWithMargins (ViewGroup. Java: 6834) на android.widget.LinearLayout.measureChildBeforeLayout (LinearLayout.java:1565) на android.widget.LinearLayout.measureVertical (LinearLayout.java:847) на android.widget.LinearLayout.onMeasejarandroid.view.View.measure (View.java:23466) на android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) на android.widget.FrameLayout.onMeasure (FrameLayout.java:185) в android.view.View.measure (View.java:23466) в android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) в android.widget.FrameLayout. onMeasure (FrameLayout.java:185) в android.view.View.measure (View.java:23466) в android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) в androidx.coordinatorlayout.widget.CoordinatorLayout.onMordCore.java: 733) в androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure (CoordinatorLayout.java:805) в android.view.View.measure (View.java:23466) в androidx.drawerlayout.widget.DrawerLayout.onMeout (DrawerLayay. Java: 1119) на android.view.View.measure (View.java:23466) на android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) на android.widget.FrameLayout.onMeasure (FrameLayout.java:185) наandroidx.appcompat.widget.ContentFrameLayout.onMeasure (ContentFrameLayout.java:143) в android.view.View.measure (View.java:23466) в android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) по адресу android.widget.LinearLayout.measureChildBeforeLayout (LinearLayout.java:1565) по адресу android.widget.LinearLayout.measureVertical (LinearLayout.java:8ay.. Linear.Layout.jar.Layout.jar.Lain.Larout.jar.java: 726) в android.view.View.measure (View.java:23466) в android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) в android.widget.FrameLayout.onMeasure (FrameLayout.java:185)на android.view.View.measure (View.java:23466) на android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6834) на android.widget.LinearLayout.measureChildBeforeLayout (LinearLayout.java:1565) на android.widLinearLayout.measureVertical (LinearLayout.java:847) в android.widget.LinearLayout.onMeasure (LinearLayout.java:726) в android.view.View.measure (View.java:23466) в android.view.ViewGroup.measureChildWithGargins (.java: 6834) в android.widget.FrameLayout.onMeasure (FrameLayout.java:185) в com.android.internal.policy.DecorView.onMeasure(DecorView.java:847) в android.view.View.measure (View.java:23466) в android.view.ViewRootImpl.performMeasure (ViewRootImpl.java:2954) в android.view.ViewRootImpl.measureHierarchy (ViewRootImpl.java:1753) в android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2041) в android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1636) в android.view.ViewRootImpl $ TraversalRunnable.omp.Run (View) (View)в android.view.Choreographer $ CallbackRecord.run (Choreographer.java:1092) в android.view.Choreographer.doCallbacks (Choreographer.java:893) в android.view.Choreographer.doFrame (Хореограф.java:812 в)view.Choreographer $ FrameDisplayEventReceiver.run (Choreographer.java:1078) на android.os.Handler.handleCallback (Handler.java:907) на android.os.Handler.dispatchMessage (Handler.java:105) на android.os.Looper.loop (Looper.java:216) в android.app.ActivityThread.main (ActivityThread.java:7625) в java.lang.reflect.Method.invoke (собственный метод) в com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run (RuntimeInit.java:524) на com.android.internal.os.ZygoteInit.main (ZygoteInit.java:987)
AsyncTask
class StartAsyncTask extends AsyncTask<Void,String[],Void>{
@Override
protected void onPreExecute() {
super.onPreExecute();
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.gravity = Gravity.CENTER;
linearLayout.removeAllViews();
ProgressBar progressBar = new ProgressBar(context);
linearLayout.addView(progressBar, layoutParams);
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
LinearLayout.LayoutParams layoutParamsKek = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParamsKek.gravity = Gravity.CENTER;
linearLayout.removeAllViews();
ViewPager viewPager = new ViewPager(context);
viewPager.setAdapter(pagerAdapter);
linearLayout.addView(viewPager,layoutParamsKek);
// Date start = new Date();
// switch (start.toString().substring(0,3)) {
// case "Mon":
// viewPager.setCurrentItem(0);
// url = "Monday.txt";
// break;
// case "Tue":
// viewPager.setCurrentItem(1);
// url = "Tuesday.txt";
// break;
// case "Wed":
// viewPager.setCurrentItem(2);
// url = "Wednesday.txt";
// break;
// case "Thu":
// viewPager.setCurrentItem(3);
// url = "Thursday.txt";
// break;
// case "Fri":
// viewPager.setCurrentItem(4);
// url = "Friday.txt";
// break;
// case "Sat":
// viewPager.setCurrentItem(5);
// url = "Saturday.txt";
// break;
// default:
// viewPager.setCurrentItem(0);
// url = "Monday.txt";
// break;
// }
//// SharedPreferences.Editor editor = settings.edit();
//// editor.putString("Day", url);
//// editor.apply();
//// tabLayout.setupWithViewPager(viewPager);
//// tabLayout.setScrollX(tabLayout.getWidth());
//// tabLayout.getTabAt(5).select();
}
@Override
protected Void doInBackground(Void... voids) {
pagerAdapter = new PagerAdapterZvon(getActivity().getSupportFragmentManager());
return null;
}
}
Адаптер
class PagerAdapterZvon extends FragmentPagerAdapter {
private String[] name;
PagerAdapterZvon(@NonNull FragmentManager fm) {
super(fm);
name = new String[] {
"Понедельник",
"Вторник",
"Среда",
"Четверг",
"Пятница",
"Суббота"
};
}
@Override
public CharSequence getPageTitle(int position){
return name[position];
}
@Override
public int getCount() {
return 6;
}
@NonNull
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new classMonday();
case 1:
return new classTuesday();
case 2:
return new classWednesday();
case 3:
return new classThursday();
case 4:
return new classFriday();
case 5:
return new classSaturday();
default:
return null;
}
}
}
Все действие происходит во фрагменте, а если удалить AsyncTask и перенести все действия в onCreate, то все работает