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Are Roboto and Roboto Bold Guaranteed at 4.0+?

In our application we use Roboto and Roboto Bold. However, in some versions of Android (it seems, from 4.0 to 4.1), we have problems with text rendering when using the imported version of Roboto (i.e., using Typeface.createFromAsset()), which do not appear when simply using the built-in version of Roboto (i.e. Typeface.DEFAULT).

I know that Roboto and Roboto Bold were introduced in Android 4.0, but I can not find anything that guarantees that these fonts are available regardless of the modification of the manufacturer (for example, Touchwiz, Sense). If they are guaranteed to exist, we can simply use version checking to use only native imports for devices below Android 4.0.

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EDIT . In some experiments, especially with the Galaxy S3, which allows the user to change the font, this is what I found:

  • Using Typeface.create(Typeface.SANS_SERIF, Typeface.NORMAL)will return this CUSTOM font, not the default sans-serif font (i.e. Roboto)
  • Use Typeface.create("sans-serif", Typeface.NORMAL)(or BOLD) instead , and it will return Roboto regardless of the font customization. From the list below you can actually use "helvetica", "tahoma", "verdana" or "arial" above instead of "sans-serif" with the same result.

I found a document called system_fonts.xmlwhich seems to confirm that Roboto will be used for any link to Typeface.SANS_SERIFin the SDK directory under:

platform > android-14 > data >

<!--
    System Fonts

    This file lists the font families that will be used by default for all supported glyphs.
    Each entry consists of a family, various names that are supported by that family, and
    up to four font files. The font files are listed in the order of the styles which they
    support: regular, bold, italic and bold-italic. If less than four styles are listed, then
    the styles with no associated font file will be supported by the other font files listed.

    The first family is also the default font, which handles font request that have not specified
    specific font names.

    Any glyph that is not handled by the system fonts will cause a search of the fallback fonts.
    The default fallback fonts are specified in the file /system/etc/fallback_fonts.xml, and there
    is an optional file which may be supplied by vendors to specify other fallback fonts to use
    in /vendor/etc/fallback_fonts.xml.
-->
<familyset>

    <family>
        <nameset>
            <name>sans-serif</name>
            <name>arial</name>
            <name>helvetica</name>
            <name>tahoma</name>
            <name>verdana</name>
        </nameset>
        <fileset>
            <file>Roboto-Regular.ttf</file>
            <file>Roboto-Bold.ttf</file>
            <file>Roboto-Italic.ttf</file>
            <file>Roboto-BoldItalic.ttf</file>
        </fileset>
    </family>

fallback_fonts.xml, , , , - Roboto sans-serif, aria, helvetica, tahoma verdana, , Roboto , Typeface.create(Typeface.SANS_SERIF, Typeface.NORMAL).

, , , OEM system_fonts.xml. , .

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3.8.5 Android 4.0 :

3.8.5. Android "" . Android 3.0 "" "" , Holo, Android SDK [, 24]. Holo , [, 25]. Android 4.0 " " , , . DeviceDefault [, 25].

AFAIK, Roboto Android 4.0 , Google (.. Google Play).

4.1 < i2 >

( PDF , , 4 )

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