字体真棒在Viewpager previous下一页 [英] Font Awesome in Viewpager Previous Next

问题描述

我试图设置字体真棒箭头为previous'和'下一个'，而不是我的网页标题。我如何做到这一点？我知道如何在手动的话加，现在我怎样才能改变这种状况在我strings.xml中定义？引用的箭头

 字样字体= Typeface.createFromAsset（getAssets（），字体/ fontawesome-webfont.ttf）;
        @覆盖
        公共字符串getPageTitle（INT位置）{                如果（位置== CURRENT_POSITION  -  1）{
                     字符串title =previous
                     返回称号;
                }否则如果（位置== CURRENT_POSITION + 1）{
                     字符串title =下一步;
                     返回称号;
                }
            返回称号;
        }
 

对于未来的读者来说，这是根据所提供的答案是什么工作：

 最终字样字体= Typeface.createFromAsset（getAssets（），字体/ fontawesome-webfont.ttf）;
           @覆盖
            公共CharSequence的getPageTitle（INT位置）{
             字符串title =;
              如果（位置== CURRENT_POSITION  -  1）{
                标题=\\ uf137
                SpannableStringBuilder风格=新SpannableStringBuilder（职称）;
                styled.setSpan（新CustomTypefaceSpan（，字体），0，title.length（），Spannable.SPAN_EXCLUSIVE_INCLUSIVE）;
                // previous
                返回风格;            }否则如果（位置== CURRENT_POSITION + 1）{
                //下一个
                标题=\\ uf138
                SpannableStringBuilder风格=新SpannableStringBuilder（职称）;
                styled.setSpan（新CustomTypefaceSpan（，字体），0，title.length（），Spannable.SPAN_EXCLUSIVE_INCLUSIVE）;
                返回风格;
            }
 

解决方案

为了直接申请任何自定义样式到一个文本序列（而不是设置它的视图），可以在<$ C $包裹串C>跨度。不幸的是，框架不具有接受字样对象（ TypefaceSpan 接受字体系列内置跨度对象代替）。

然而，有许多的例子（如<一个href=\"http://stackoverflow.com/questions/4819049/how-can-i-use-typefacespan-or-stylespan-with-a-custom-typeface\">this 之一）创建一个简单的子类，将适用于您的自定义类型的脸。

应用它看起来是这样的：

  @覆盖
公共CharSequence的getPageTitle（INT位置）{
    字体的字体= Typeface.createFromAsset（getAssets（），fontawesome-webfont.ttf）;
    字符串title =;    如果（位置== CURRENT_POSITION  -  1）{
        标题=\\ uf137
    }否则如果（位置== CURRENT_POSITION + 1）{
        标题=\\ uf138
    }    SpannableString风格=新SpannableString（职称）;
    styled.setSpan（新CustomTypefaceSpan（字体），0，title.length（），Spannable.SPAN_EXCLUSIVE_INCLUSIVE）;    返回风格;
}
 

I'm trying to set Font Awesome Arrows as the 'previous' and 'next' instead of my page titles. How do I accomplish this? I know how to manually add in the words, now How can I change that to the referenced arrows defined in my strings.xml?

        Typeface font = Typeface.createFromAsset( getAssets(), "fonts/fontawesome-webfont.ttf" );
        @Override
        public String getPageTitle(int position) {

                if (position == current_position - 1) {
                     String title = "Previous";
                     return title;
                } else if (position == current_position + 1) {
                     String title = "Next";
                     return title;
                }
            return title;   
        }

For future readers, this is what worked based on the answer provided:

 final Typeface font = Typeface.createFromAsset(getAssets(), "fonts/fontawesome-webfont.ttf" );
           @Override
            public CharSequence  getPageTitle(int position) {
             String title = "";
              if (position == current_position - 1) {
                title = "\uf137";
                SpannableStringBuilder styled = new SpannableStringBuilder(title);
                styled.setSpan(new CustomTypefaceSpan("", font), 0, title.length(), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
                //Previous
                return styled;

            } else if (position == current_position + 1) {
                //Next
                title = "\uf138";
                SpannableStringBuilder styled = new SpannableStringBuilder(title); 
                styled.setSpan(new CustomTypefaceSpan("",font), 0, title.length(), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
                return styled;
            }

解决方案

In order to apply any custom styling directly to a text sequence (rather than setting it on the view), you can wrap the string in a Span. Unfortunately, the framework does not have a built-in span object that accepts a Typeface object (TypefaceSpan accepts a font family instead).

However, there are many examples (such as this one) for creating a simple subclass that will apply your custom type face.

Applying it would look something like this:

@Override
public CharSequence getPageTitle(int position) {
    Typeface font = Typeface.createFromAsset( getAssets(), "fontawesome-webfont.ttf" );
    String title = "";

    if (position == current_position - 1) {
        title = "\uf137";
    } else if (position == current_position + 1) {
        title = "\uf138";
    }

    SpannableString styled = new SpannableString(title);
    styled.setSpan(new CustomTypefaceSpan(font), 0, title.length(), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);

    return styled;
}

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