如何设置字体自定义字体，以微调文本编程？ [英] How to set font custom font to Spinner text programmatically?

问题描述

我在我的资产文件夹中的TTF字体文件。我知道如何使用它textviews有：

I have a ttf font file in my assets folder. I know how to use it for textviews with:

Typeface externalFont=Typeface.createFromAsset(getAssets(), "fonts/HelveticaNeueLTCom-Lt.ttf");
textview1.setTypeface(externalFont);

我已经定义看在它自己的XML文件，我的微调文本（如usuall在机器人）：

I have defined look for my spinner text in it's own xml file (as usuall in android):

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+android:id/text1"
style="?android:attr/spinnerItemStyle"
android:singleLine="true"
android:textColor="#ffffff"
android:gravity="center" 
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee" />

我不能引用这个TextView的从code，我总是得到空指针异常。例如。我想：

I just can't reference this textview from code, i always get null pointer exceptions. E.g. i tried:

TextView spinner_text=(TextView)findViewById(R.id.text1);
spinner_text.setTypeface(externalFont);

是否有可能甚至在它自己的XML来定义我的微调文本？选择我的外部字体

Is it possible to select my external font even for my spinner text defined in it's own xml?

感谢你。

编辑： 这工作：

String [] items = new String[2];
    items[0]="Something1";
    items[1]="Something2";

     ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                    R.layout.spinaca, items) {

         public View getView(int position, View convertView, ViewGroup parent) {
                 View v = super.getView(position, convertView, parent);

                 Typeface externalFont=Typeface.createFromAsset(getAssets(), "fonts/HelveticaNeueLTCom-Lt.ttf");
                 ((TextView) v).setTypeface(externalFont);

                 return v;
         }


         public View getDropDownView(int position,  View convertView,  ViewGroup parent) {
                  View v =super.getDropDownView(position, convertView, parent);

                 Typeface externalFont=Typeface.createFromAsset(getAssets(), "fonts/HelveticaNeueLTCom-Lt.ttf");
                 ((TextView) v).setTypeface(externalFont);
                 v.setBackgroundColor(Color.GREEN);

                 return v;
         }
 };


     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);                                 
     spinner.setAdapter(adapter);

有可能有必要添加

import android.view.ViewGroup;

要进口的，在你的文件顶部的列表。出于某种原因，Eclipse不使这个建议时，它不承认参与了code中的一个ViewGroup类。

To your list of imports at the top of your file. For some reason Eclipse doesn't make this suggestion when it doesn't recognize the ViewGroup class involved in the code.

推荐答案

这是为我工作（使用的想法都来自 CommonsWare的和 gsanllorente 的答案）：

This is what worked for me (using ideas both from CommonsWare's and gsanllorente's answers):

private static class MySpinnerAdapter extends ArrayAdapter<String> {
    // Initialise custom font, for example:
    Typeface font = Typeface.createFromAsset(getContext().getAssets(),
                        "fonts/Blambot.otf");

    // (In reality I used a manager which caches the Typeface objects)
    // Typeface font = FontManager.getInstance().getFont(getContext(), BLAMBOT);

    private MySpinnerAdapter(Context context, int resource, List<String> items) {
        super(context, resource, items);
    }

    // Affects default (closed) state of the spinner
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        TextView view = (TextView) super.getView(position, convertView, parent);
        view.setTypeface(font);
        return view;
    }

    // Affects opened state of the spinner
    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        TextView view = (TextView) super.getDropDownView(position, convertView, parent);
        view.setTypeface(font);
        return view;
    }
}

如果你和我一样，最初填充微调使用 ArrayAdapter.createFromResource（）和阵列的资源（如在的Spinner文档），那么你会使用MySpinnerAdapter是这样的：

If you, like me, originally populated the Spinner using ArrayAdapter.createFromResource() and an array resource (as in Spinner documentation), then you'd use MySpinnerAdapter like this:

MySpinnerAdapter<String> adapter = new MySpinnerAdapter(
        getContext(),
        R.layout.view_spinner_item,
        Arrays.asList(getResources().getStringArray(R.array.my_array))
);
spinner.setAdapter(adapter);

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