Custom_popup_menu.java

PopupMenu popupMenu = new PopupMenu(your_activity.this, your_onClick_view_id);
popupMenu.getMenuInflater().inflate(R.menu.popup_menu_xml_page, popupMenu.getMenu());

popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
	@Override
	public boolean onMenuItemClick(MenuItem menuItem) {
		if (menuItem.getItemId() == R.id.item_one){
			// do something
		}
		else if (menuItem.getItemId() == R.id.item_two){
			// do something
		}
		else{}
		return true;
	}
});
popupMenu.show();

popup_menu_xml_page.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/item_one"
        android:title="@string/item_one" />
    <item
        android:id="@+id/item_two"
        android:title="@string/item_tow" />

</menu>