Make sure your app's minSdkVersion supports the method you're using. As of Android 8.0 (API level 26), you can use the font attribute directly in XML to reference fonts from the font directory. For lower API levels, you might need to use the Typeface class.
Even if you can’t change the system font, you can change the : sutonnymj font for android
Because the font is proprietary, its free distribution on Android forums, APK download sites, and third-party font stores constitutes a violation of copyright. Despite this, the font is widely pirated. Users frequently download modified "Sutonnymj" TTF or OTF files to install via custom font engines (like zFont or iFont). This creates an ethical dilemma within the Bengali tech community. While the font is essential for cultural preservation and professional consistency, the method of acquiring it for Android often bypasses the rights of the developers who created it. This has led to a stagnation in official support; the original developers have not released an official, optimized version for mobile operating systems, likely due to the rampant piracy of their desktop software. Make sure your app's minSdkVersion supports the method
zFont will generate a preview. You can adjust the font size and weight here. For best results, keep the default settings. Even if you can’t change the system font,