android - PopupWindow on CustomDialog -

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i've 1 customdialog(it implemented in other package),like below

customdialog = new customizedialog(this); customdialog.setcontentview(r.layout.student_register_form);

and in customdialog have 1 button, when click on , popupwindow display

countrypopupwindow = new listviewpopupwindow(context, r.layout.grade_popup_layout, values, ids, "country");

this custructor,and implemented every thing,i got popup window displaying on mainactivity,not on customdialog


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