在android应用程序中设置自定义字体

import android.content.Context;
import android.graphics.Typeface;
import android.widget.TextView;

public class FontHelper {
    private static Typeface customTypeface;

    public static void setCustomTypeface(Context context, TextView textView, String fontName) {
        if (customTypeface == null) {
            customTypeface = Typeface.createFromAsset(context.getAssets(), "fonts/" + fontName);
        }
        textView.setTypeface(customTypeface);
    }
}

TextView textView = findViewById(R.id.textView);
FontHelper.setCustomTypeface(this, textView, "your_font.ttf");