fragments in viewpager, no view found error

Question

I have an activity holding a fragment, in this fragment there is a button , when it is clicked, a dialog is popped out.

In this dialog, there is a Viewpager, which

Answer 1

The Dialog class is the base class for dialogs, but you should avoid instantiating Dialog directly. Instead, use one of the following subclasses:

AlertDialogA dialog that can show a title, up to three buttons, a list of selectable items, or a custom layout. And also DatePickerDialog or TimePickerDialog.

These classes define the style and structure for your dialog, but you should use a DialogFragment as a container for your dialog. The DialogFragment class provides all the controls you need to create your dialog and manage its appearance, instead of calling methods on the Dialog object.

For more detail please go through Dialog Design