Why is my Button text forced to ALL CAPS on Lollipop?

In my app "Tide Now WA" which I recently tested for compatibility using the new Nexus 9 tablet (Lollipop - API 21).

It writes some button text. This app writes the text correctly using Android 2.3 and Android 4.0. I.e. mixed capital and lower case letters.

When same app is run on my Nexus 9 all the letters in the text are capitalized.

FWIW my manifest contains the following statement:

uses-sdk android:minSdkVersion="10" android:targetSdkVersion="14"

Can I fix this in my code or is it a bug in the O.S. thanks

I don't have idea why it is happening but there 3 trivial attempts to make:

1. Use android:textAllCaps="false" in your layout-v21

2. Programmatically change the transformation method of the button. mButton.setTransformationMethod(null);

3. Check your style for Allcaps

Note: public void setAllCaps(boolean allCaps), android:textAllCaps are available from API version 14.

Here's what I did in my values/themes.xml

    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="buttonStyle">@style/MyButton</item>
    </style>

    <style name="MyButton" parent="Widget.AppCompat.Button">
        <item name="android:textAllCaps">false</item>
    </style>

This is fixable in the application code by setting the button's TransformationMethod, e.g.

mButton.setTransformationMethod(null);

Set android:textAllCaps="false". If you are using an appcompat style, make sure textAllCaps comes before the style. Otherwise the style will override it. For example:

android:textAllCaps="false"
style="@style/Base.TextAppearance.AppCompat"