Android Question Custom Font

[Blueforcer]

I want to change the whole font of my app from native Roboto do something else. im Using a android 7 and 8 device
i found this Tutorial

Setting custom font for whole application without any library

Hi everyone, After a week I have finally figured it out how to add a custom font for the whole application without any library or extra code. Here is the solution: Create a folder resource inside your project folder. Create a new folder font inside the resource folder and copy your font...

www.b4x.com

i needed to change CustomFontStyle to custom_font otherwise i was getting the error:
res\values\theme.xml:8: error: resource font/CustomFontStyle (aka de.dinotec.netplus:font/CustomFontStyle) not found.

With this it compiles without an error message, but the Font is still the same, even after resinstalling and project cleaning.
What im doing wrong? what is "Support Library 26"?

SetApplicationAttribute(android:theme, "@style/MyAppTheme")
CreateResource(values, theme.xml,
<resources>
    <style name="MyAppTheme" parent="@style/Theme.AppCompat.Light.DarkActionBar">
        <item name="colorPrimary">#0098FF</item>
        <item name="colorPrimaryDark">#007CF5</item>
        <item name="windowNoTitle">true</item>
        <item name="windowActionBar">false</item>
         <item name="android:fontFamily">@font/custom_font</item>
        <item name="fontFamily">@font/custom_font</item>
    </style>
</resources>
)

CreateResource(font, custom_font.xml,
<font-family xmlns:android="http://schemas.android.com/apk/res/android"
                    xmlns:app="http://schemas.android.com/apk/res-auto">
    <font android:fontStyle="normal" android:fontWeight="400" android:font="@font/mulish"/>
    <font android:fontStyle="italic" android:fontWeight="400" android:font="@font/mulish" />
    <font app:fontStyle="normal" app:fontWeight="400" app:font="@font/mulish"/>
    <font app:fontStyle="italic" app:fontWeight="400" app:font="@font/mulish" />
</font-family>
)

 

[LucaMs]

With this it compiles without an error message, but the Font is still the same, even after resinstalling and project cleaning.
What im doing wrong? what is "Support Library 26"?

For API level 26 or lower use the app namespace to ensure your fonts load.

app namespace = package name

 

[Blueforcer]

app namespace = package name

It doesnt work either and i dont think its the same, "app:" is the namespace for API 16–25 and "android:" API ≥ 26. thats why both exists in the xml.

 

[Blueforcer]

I am currently experimenting / guessing with chatgpt and have at least gotten to the point where Msgboxen and CSbuilder accept a new font (without explicitly setting one in code). But here, too, the title is missing, and the rest of my app still has the standard font.

But only if im adding:

#Extends: android.support.v7.app.AppCompatActivity

SetApplicationAttribute(android:theme, "@style/MyAppTheme")
CreateResource(values, theme.xml,
<resources>
    <style name="MyAppTheme" parent="@style/Theme.AppCompat.Light.NoActionBar">
        <item name="colorPrimary">#0098FF</item>
        <item name="colorPrimaryDark">#007CF5</item>
        <item name="windowNoTitle">true</item>
        <item name="windowActionBar">false</item>
         <item name="android:fontFamily">@font/rubik</item>
        <item name="fontFamily">@font/rubik</item>
       <item name="android:textViewStyle">@style/AllTextViews</item>
    </style>
   
    <style name="AllTextViews" parent="@android:style/Widget.TextView">
        <item name="android:fontFamily">@font/rubik</item>
        <item name="fontFamily">@font/rubik</item>
    </style>
</resources>
)