[AutoCompleteTextView] Exposed Dropdown Menu not showing items

Description:

Exposed Dropdown Menu doesn’t show items after user selection and fragment transition.

Following is the basic xml declaration:

<com.google.android.material.textfield.TextInputLayout
    ...
    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.ExposedDropdownMenu"
 
         <AutoCompleteTextView
            .... 
            android:id="@+id/dropdown"
            android:dropDownHeight="300dp"
            android:inputType="none" />
</com.google.android.material.textfield.TextInputLayout>

And, the declared code on the fragment (inside onViewCreated()):

    val items = listOf("Material", "Design", "Components", "Android")
    val adapter = ArrayAdapter(requireContext(), R.layout.item_menu, items)
    dropdown.setAdapter(adapter)
    dropdown.setText(items[0], false)

As mentioned here, it was set on AutoCompleteTextView's setText method (dropdown.setText(“”, false)) the filter parameter as false. However, after navigating to a next fragment and coming back to it, only the pre-selected text is shown on the dropdown.

Fragments are changed using navigation component (v. 2.3.2).

Expected behavior: Dropdown should show all items.

Android API version: Android API 30

Material Library version: 1.3.0-rc01

Device: Emulator - Pixel 4 XL

[heriawanfx]

You can implement this extention on onClickListener to make all list keep showing after it clicked.

fun AutoCompleteTextView.showDropdown(adapter: ArrayAdapter<String>?) {
    if(!TextUtils.isEmpty(this.text.toString())){
        adapter?.filter?.filter(null)
    }
}

And also add focusable=“false” to AutoCompleteTextView in xml.

[jerryOkafor]

Currently experiencing the same problem here, does any one have a fix for this?

Temp solution working for me is to move part of the code to onResume():

override fun onResume() {
        super.onResume()

        val arrayAdapter =
            ArrayAdapter(requireContext(), R.layout.menu_list_item, floorEntries)
        binding.tvFloor.setAdapter(arrayAdapter)

        setSelectedFloor()
    }