android - 在 assets/fonts 文件夹中导入 roboto 字体后，我的应用程序滚动非常糟糕

Question

我的应用程序运行 android Ice Cream Sandwich ，在字体文件夹中导入 roboto.ttf 和 roboto-bold.ttf 字体并使用这些字体设置四个 TextView 后，滚动 ListView 时非常(非常)慢。有谁知道优化性能的方法？有什么提示和技巧可以提高速度吗？

我澄清在插入这几行代码之前是非常顺利的:

Typeface roboto = Typeface.createFromAsset(activity.getAssets(), "fonts/Roboto-Regular.ttf");
    Typeface robotobold = Typeface.createFromAsset(activity.getAssets(), "fonts/Roboto-Bold.ttf");
    nome.setTypeface(robotobold);
    mq.setTypeface(roboto);
    citta.setTypeface(roboto);
    prezzo.setTypeface(roboto);
    descrizione.setTypeface(roboto);

我添加了有助于字体缓存的类:

public class TypefaceCache {
  private final HashMap<String, Typeface> map;
  private Context con;
  public TypefaceCache(Context con) {
              map = new HashMap<String, Typeface>();
              this.con = con;
  }


  public Typeface getTypeface(String file) {
    Typeface result = map.get(file);
    if (result == null) {
      result = Typeface.createFromAsset(con.getAssets(), file);
      map.put(file, result);
    }
    return result;
  }
}

我通过调用类和字体

    TypefaceCache typecache = new TypefaceCache(activity);
    Typeface roboto = typecache.getTypeface("fonts/Roboto-Regular.ttf");

但结果是一样的...

Answer 1

您可以尝试缓存您的字体。

public class TypefaceCache {
  private final HashMap<String, Typeface> map =
      new HashMap<String, Typeface>();

  private Typeface getTypeface(String file, Context context) {
    Typeface result = map.get(file);
    if (result == null) {
      result = Typeface.createFromAsset(context.getAssets(), file);
      map.put(file, result);
    }
    return result;
  }
}