ListPopupWindow not obeying WRAP_CONTENT width spec

Question

I\'m trying to use ListPopupWindow to show a list of strings via an ArrayAdapter (eventually this will be a more complex custom adapter). Code is below. As shown in

Answer 1

You can actually get the anchorView's parent (since the actual anchorView is generally a button) and base your width from there. For example:

popup.setWidth(((View)anchor.getParent()).getWidth()/2);

That way you can get a flexible width.

Answer 2

Another solution is to set a 0dp height view in your layout xml to use as an anchor.

<View
    android:id="@+id/popup_anchor"
    android:layout_width="140dp"
    android:layout_height="0dp"/>

then set the anchor view sometime before calling the show() method.

listPopupWindow.setAnchorView(popupAnchor);
listPopupWindow.show();

Answer 3

My approach to this.

Create a Viewin your layout which functions as an anchor, with your dedicated width and position (Height 1 dp, width as you wish) (may be dynamic i.e. with ConstraintLayouts). Make it invisible (android:visibility=View.INIVISIBLE).

                <View
                    android:id="@+id/my_anchor"
                    android:layout_height="1dp"
                    android:layout_width="0dp"
                    app:layout_constraintTop_toBottomOf="@id/list_item_order_list_app_compat_image_button_gallery"
                    app:layout_constraintStart_toEndOf="@id/list_item_order_list_material_button_map"
                    app:layout_constraintEnd_toEndOf="parent"
                    android:visibility="invisible"
                    android:layout_marginStart="8dp"
                    android:layout_marginEnd="8dp"
                    />

Reference to this view in your viewAnchor, (i.e with bindings):

listPopupWindow.anchorView = binding.myAnchor

Answer 4

I would just set a dimension in your dimen.xml file at 160dp or so:

<dimen name="overflow_width">160dp</dimen>

Then set your popup width using the getDimensionPixelSize method to convert into pixels:

int width = mContext.getResources().getDimensionPixelSize(R.dimen.overflow_width); 
mListPopupWindow.setWidth(width);

That should keep the size density independent.

Answer 5

I think the best thing to use is the PopupMenu . example:

final PopupMenu popupMenu = new PopupMenu(mActivity, v);
popupMenu.getMenu().add("test");
popupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {

    @Override
    public boolean onMenuItemClick(final MenuItem item) {
        return true;
    }
});
popupMenu.show();

Answer 6

I believe that your issue lies with your ArrayAdapter using simple_list_item_1. If you look at the source code for that element it has the property of

android:layout_width="match_parent"

If you look at the source here you can create your own new_list_item_1.xml with the same info but changing it to android:layout_width="wrap_content" and then use that in your ArrayAdapter