How to dismiss all popup windows in an Activity Android

Question

I am trying to dismiss a popup window which was created in TextView class. The popup window is created as:

    PopupWindow mPopupWindow;
    mPopupWindow =new PopupWindow(mTextView.getContext(), null,
                          com.android.internal.R.attr.textSelectHandleWindowStyle);   
    mPopupWindow.setClippingEnabled(true);
    mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
    mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);

I don't have any reference to that popup window. But I need to dismiss it. So, Is there any way to dismiss all the popup windows in Window Manager?

Thanks.