Android字体方案 TypeFace

android默认的字体

Android系统默认支持三种字体，分别为：“sans”, “serif”, “monospace"。

替换方案1

可以通过ID查找到View，然后挨个为它们设置字体。

Typeface customFont = Typeface.createFromAsset(this.getAssets(), "fonts/YourCustomFont.ttf");
TextView view = (TextView) findViewById(R.id.activity_main_header);
view.setTypeface(customFont);

这种方案在大量替换下非常麻烦。

替换方案2

你可以为每个文本组件创建一个子类，如TextView、Button等，然后在构造函数中加载自定义字体。

public class BrandTextView extends TextView {

    public BrandTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }
    public BrandTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public BrandTextView(Context context) {
        super(context);
    }

    @Override
    public void setTypeface(Typeface tf, int style) {
        if (style == Typeface.BOLD) {
             super.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/YourCustomFont_Bold.ttf"));
        } else {
             super.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/YourCustomFont.ttf"));
        }
    }
 }

github方案

/**
 * Helper class to apply custom font from assets to all text views in the specified root
 * view.
 * 
 * @author Alexander Naberezhnov
 */
public class FontHelper {

    /**
     * Apply specified font for all text views (including nested ones) in the specified
     * root view.
     * 
     * @param context
     *            Context to fetch font asset.
     * @param root
     *            Root view that should have specified font for all it's nested text
     *            views.
     * @param fontPath
     *            Font path related to the assets folder (e.g. "fonts/YourFontName.ttf").
     */
    public static void applyFont(final Context context, final View root, final String fontPath) {
        try {
            if (root instanceof ViewGroup) {
                ViewGroup viewGroup = (ViewGroup) root;
                int childCount = viewGroup.getChildCount();
                for (int i = 0; i < childCount; i++)
                    applyFont(context, viewGroup.getChildAt(i), fontPath);
            } else if (root instanceof TextView)
                ((TextView) root).setTypeface(Typeface.createFromAsset(context.getAssets(), fontPath));
        } catch (Exception e) {
            Log.e(TAG, String.format("Error occured when trying to apply %s font for %s view", fontPath, root));
            e.printStackTrace();
        }
    }
}