Android Spinner: how to match parent and append the dropdown to the bottom

Question

I'm having an hard time trying to fix this problem.

As you can see in those images, I want to make the dropdown list match its parent (that is the rectangular button) and, if it's possible, append the dropdown itself to the bottom of the Spinner.

Here's my XML.

The Spinner:

[...]

<Spinner
    android:id="@+id/fuel_types"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="@dimen/padding_8dp"
    android:paddingLeft="@dimen/padding_5dp"
    android:layout_gravity="start"
    android:gravity="center"
    android:spinnerMode="dropdown"/>

[...]

Its TextView:

<?xml version="1.0" encoding="utf-8"?>
<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/single_item"
    style="@style/AppTheme.Dark.AddPrice"
    android:singleLine="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="@dimen/text_size_20sp"
    android:textStyle="bold"
    android:ellipsize="marquee"/>

The CheckedTextView:

<?xml version="1.0" encoding="utf-8"?>
<CheckedTextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    style="@style/AppTheme.Dark.AddPrice"
    android:layout_width="match_parent"
    android:layout_height="@dimen/add_price_checked_height"
    android:ellipsize="marquee"
    android:paddingBottom="@dimen/padding_5dp"
    android:paddingLeft="@dimen/padding_10dp"
    android:paddingRight="@dimen/padding_10dp"
    android:paddingTop="@dimen/padding_5dp"
    android:singleLine="true"
    android:textColor="@color/white"
    android:textSize="@dimen/text_size_15sp"
    android:textStyle="bold"
    android:background="@color/colorPrimaryLight"
    android:gravity="center"
    android:textAlignment="gravity"/>

Now the current appearance of my Spinner:

This is what I'd like to obtain (maybe with the dropdown having rounded corners, too):

Any hints? Am I missing something?

Answered here: http://stackoverflow.com/a/28929835/4504191 – kris larson Jul 22 '16 at 19:59 — kris larson, Jul 22 '16 at 19:59
Found a solution for older APIs, too. Thank you. – Davide3i Jul 22 '16 at 21:53 — Davide3i, Jul 22 '16 at 21:53

score 1 · Accepted Answer · answered Jul 22 '16 at 21:53

1

In addition to kris larson's comment, I can suggest to use this attribute on APIs older than 17:

android:dropDownVerticalOffset="@dimen/dropdown_vertical_offset"

Just create two different layout XMLs.

answered Jul 22 '16 at 21:53

Davide3i

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Android Spinner: how to match parent and append the dropdown to the bottom

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