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

时间:2012-06-28 02:09:23

标签: android performance fonts scroll

运行android冰淇淋三明治的应用程序,在字体文件夹中导入roboto.ttf和roboto-bold.ttf字体后,在使用这些字体设置四个textview后,在滚动listview时非常(非常)慢。 有谁知道优化表演的方法?是否有提高速度的提示和技巧?

我澄清说在插入这些代码行之前它非常顺利:

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);

我添加了可以帮助进行字体缓存的类:

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......

3 个答案:

答案 0 :(得分:4)

您可以尝试缓存Typeface

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;
  }
}

答案 1 :(得分:1)

我不久前遇到过这个问题,解决办法是将类设置为静态,就像在blog中描述的那样;

public class TypefaceSingleton {  
    private static TypefaceSingleton instance = new TypefaceSingleton();  
    private TypefaceSingleton() {}  

    public static TypefaceSingleton getInstance() { 
        return instance; 
    }  
    public Typeface getTypeface() { 
        return Typeface.createFromAsset(ThinkNearApp.getContext().getResources().getAssets(), "fonts/Roboto-Bold.ttf"); 
    } 
}

答案 2 :(得分:0)

这是我的解决方案: 在asynctask中我启动ui我插入类变量

private final HashMap<String, Typeface> map;

然后我通过类构造函数

初始化它
map = new HashMap<String, Typeface>();

我实现了在类中加载我的字体的方法:

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;
}

然后,每当我想要在asynctask中,我添加我喜欢的字体,我加载在我的textviews上,一切都很顺利。 谢谢大家