android - 在 PreferenceScreen 中为文本设置自定义字体

Question

我的 PreferenceActivity 看起来像:

import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.widget.TextView;

public class Settings extends PreferenceActivity {

    @SuppressWarnings("deprecation")
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
            super.onCreate(savedInstanceState);

            //setContentView(R.layout.about);

            Typeface timesFont = Typeface.createFromAsset(getAssets(), "fonts/times.ttf");

            TextView about_txt = (TextView) findViewById(R.id.about_txt);        
            about_txt.setTypeface(timesFont);
            about_txt.setText(R.string.about_txt);


            if (Build.VERSION.SDK_INT<Build.VERSION_CODES.HONEYCOMB)
            {
                addPreferencesFromResource(R.xml.preferences);
            } else {
                // Display the fragment as the main content.
                getFragmentManager().beginTransaction().replace(android.R.id.content,
                        new PrefsFragment()).commit();
            }
    }

    public static class PrefsFragment extends PreferenceFragment 
    {
            @Override
            public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);

                // Load the preferences from an XML resource
                addPreferencesFromResource(R.xml.preferences);
            }
        }
}

和preference.xml

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

        <ListPreference
            android:dialogTitle="@string/size_dialog"
            android:entries="@array/size_list"
            android:entryValues="@array/entry_size"
            android:key="size_list"
            android:summary="@string/size_summary"
            android:title="@string/pref4title"
            />

    </PreferenceCategory>

    <PreferenceCategory
        android:title="@string/pref_about"
        android:layout="@layout/about"
        >

    </PreferenceCategory>

</PreferenceScreen>

@layout/about (about.xml):

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:tools="http://schemas.android.com/tools"
         android:layout_width="match_parent"
         android:layout_height="match_parent"> 

          <TextView
            android:id="@+id/about_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="some text here"   
            />

</LinearLayout>

我有特定的语言，所以对于 about.xml 中的文本，我应该使用特定的字体。我经常为 TextView 使用:

 Typeface timesFont = Typeface.createFromAsset(getAssets(), "fonts/times.ttf");

 TextView about_txt = (TextView) findViewById(R.id.about_txt);        
 about_txt.setTypeface(timesFont);
 about_txt.setText(R.string.about_txt);

但是我应该使用什么来访问添加到首选项屏幕的 about.xml 中的文本？

提前致谢!

Answer 1

更改 PreferenceScreen 中所有 TextViews 字体的最简单方法是:

public class WallpaperSettings extends PreferenceActivity {

  private View tryInflate(String name, Context context, AttributeSet attrs) {
    LayoutInflater li = LayoutInflater.from(context);
    View v = null;
    try {
        v = li.createView(name, null, attrs); 
    } catch (Exception e) {
        try {
            v = li.createView("android.widget." + name, null, attrs);
        } catch (Exception e1) {
        }
    }
    return v;
  }

  protected void onCreate(Bundle savedInstanceState) {
    //CHANGE TYPEFACE FOR ALL TEXTVIEWS
    final Typeface font = Typeface.createFromAsset(getAssets(), "fonts/cabal.ttf");     
    getLayoutInflater().setFactory(new Factory() {
        @Override
        public View onCreateView(String name, Context context,
                AttributeSet attrs) {
            View v = tryInflate(name, context, attrs);
            if (v instanceof TextView) {                    
                ((TextView) v).setTypeface(font);
            }
            return v;
        }
    });

    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.prefs);
  }
}

就是这样!