无法在Spinner中设置字体

Question

我无法在Spinner中设置下拉项目的字体！

我尝试过的代码是：

public class MainActivity extends Activity {

fontadapter fa;
TextView spinner_text;
Activity temp;
String[] spin_val;
Spinner language;
Locale myLocale;
View parent;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    spin_val = new String[10];
    spin_val[0] = "english";
    spin_val[1] = "portugese";
    spin_val[2] = "spanish";

    fa = new fontadapter(MainActivity.this,  R.layout.my_spinner_text,spin_val);
    language = (Spinner) findViewById(R.id.languagespinner);

    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
            this, R.array.languages, R.layout.my_spinner_text);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    language.setAdapter(adapter);
    //language.setAdapter(fa);

    language.setOnItemSelectedListener(new OnItemSelectedListener() {

        public void onItemSelected(AdapterView<?> parent, View view,
                int pos, long id) {
            fa.getView(pos, view, parent);
            if (pos == 1) {

                setLocale("en");
            } else if (pos == 2) {

                setLocale("po");
            } else if (pos == 3) {

                setLocale("sp");
            }

        }

        public void onNothingSelected(AdapterView<?> arg0) {

        }

    });

}
private class fontadapter extends ArrayAdapter {

      Typeface tf = Typeface.createFromAsset(getAssets(), "mafw.ttf");

      public fontadapter(Context context, int textViewResourceId,String[] a) {
       super(context, textViewResourceId,a);
      }


      public View getView(int pos, View convertView, ViewGroup parent) {


          if (pos == 1) {

                setLocale("en");
            } else if (pos == 2) {

                setLocale("po");
            } else if (pos == 3) {

                setLocale("sp");
            }

          View v = super.getView(pos, convertView, parent);

             Typeface externalFont=Typeface.createFromAsset(getAssets(), "mafw.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(), "mawf.ttf");
         ((TextView) v).setTypeface(externalFont);

         return v;
 }

     }
public void setLocale(String lang) {

    myLocale = new Locale(lang);
    Resources res = getResources();
    DisplayMetrics dm = res.getDisplayMetrics();
    Configuration conf = res.getConfiguration();
    conf.locale = myLocale;
    res.updateConfiguration(conf, dm);
    Intent i = new Intent(MainActivity.this, Lovername.class);
    startActivity(i);

}

@Override
protected void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
}
}

我尝试了很多在SO中实现的方法，任何人都可以指出我的错误！

代码中没有错误，我唯一想要的是设置Drop Down微调器的字体。

由于