Dialogs and Popups in Android
问题 The Android design documentation in http://developer.android.com/design/building-blocks/dialogs.html makes a clear differentiation between Dialogs, Alerts, Popups and Toasts. It also recommends the implementation of Dialogs by means of the DialogFragment class and Toasts by means of the Toast class. However it's not clear to me whether Popups should be implemented with PopupWindow or with DialogFragment . I know that DialogFragments usually come with Ok/Cancel buttons and that the location of