我找到了解决该问题的方法，并修改了您的类，以使该错误不再发生。
唯一的主要区别是您应该使用a DialogFragment而不是aDialog，这样您就可以访问getChildFragmentManager()并FragmentManager从接收正确的信息DialogFragment。
即使您以前使用getChildFragmentManager()过，它也来自，MyFragment并且PagerDialog该类不是中的子片段MyFragment。
我已经测试了以下代码，现在应该可以正常工作。
public class MyFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_sand@R_16_2419@, container, false);
Button button = (Button) v.findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
DialogFragment newFragment = PagerDialog.newInstance();
newFragment.show(getChildFragmentManager(), "dialog");
}
});
return v;
}
}
public class PagerDialog extends DialogFragment {
public static PagerDialog newInstance() {
return new PagerDialog();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.dialog_fragment, container, false);
ViewPager mViewPager = (ViewPager) v.findViewById(R.id.view_pager);
/* Use childFragmentManager here provided from the PagerDialog */
MyAdapter mAdapter = new MyAdapter(getChildFragmentManager());
mViewPager.setAdapter(mAdapter);
return v;
}
private class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int index) {
return new DummyFragment();
}
@Override
public int getCount() {
return 2;
}
}
}
public class DummyFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_dummy_layout, container, false);
return v;
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Fragment Dialog Pager"
android:textSize="24sp"
android:padding="20dp" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment Dialog Title Text "
android:padding="10dp"
android:textColor="#333"
android:textSize="24sp"/>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="200dp"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment Dummy Text"
android:textSize="24sp"
android:textColor="#ff0000"/>
</LinearLayout>
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