android 更换字体

/**
 * 设置字体
 * 
 */
public class FontManager {

    static String fongUrl = "fonts/fzltxh.ttf";

    static Typeface tf;

    public static void applyFont(Context context, ViewGroup root, String fontName) {

        Typeface tf = getFont(context);

        for (int i = 0; i < root.getChildCount(); i++) {
            View v = root.getChildAt(i);
            if (v instanceof TextView) {
                ((TextView) v).setTypeface(tf);
            } else if (v instanceof Button) {
                ((Button) v).setTypeface(tf);
            } else if (v instanceof EditText) {
                ((EditText) v).setTypeface(tf);
            } else if (v instanceof ViewGroup) {
                applyFont(context, (ViewGroup) v, fontName);
            }
        }
    }

    public static Typeface getFont(Context context) {
//        if (tf == null) {
//            tf = Typeface.createFromAsset(context.getAssets(), fongUrl);
//        }
//        return tf;
        return Typeface.DEFAULT;
    }
}

/**
 * 自定义TextView
 * 
 */
public class MyTextView extends TextView {

    public MyTextView(Context context) {
        super(context);
        init(context);
    }

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

    private void init(Context context) {
         Typeface setFont = FontManager.getFont(context);
         if (setFont != null) {
             setTypeface(setFont);
         }
    }

}