Question

我正在尝试在PreferenceActivity中设置自定义TTF字体。

首选项活动包含2个ListPreferences，没有别的。在我的PreferenceActivity中，我有这段代码：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.prefs);
    PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(this);
}

public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
    Preference conPref = findPreference(key);

    // this works correctly, i'm able to get the correct text form tv.getText();        
    TextView tv = (TextView) conPref.getView(null, null).findViewById(android.R.id.title);

    Typeface gilFontBook = Typeface.createFromAsset(getAssets(), "fonts/gilbook.ttf");
    tv.setTypeface(gilFontBook);  // doesnt change the typeface
}

但这不适用于我。在从ListPreference

中选择项目之前和之后，字体保持不变

Answer 1

据我所知，你要扩展PreferenceActivity类来做到这一点。这个答案对我有所帮助：

https://stackoverflow.com/a/13193623/814353

Answer 2

我以粗暴的方式做到了：

public class FontPreference extends Preference {

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public FontPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    public FontPreference(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public FontPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FontPreference(Context context) {
        super(context);
    }

    @Override
    protected void onBindView(View view) {
        super.onBindView(view);

        loopOverViewGroup(view);
    }

    private void loopOverViewGroup(View view){
        if(view instanceof ViewGroup){
            ViewGroup group = (ViewGroup)view;
            for(int i = 0; i < ((ViewGroup)view).getChildCount(); i++){
                View childView = ((ViewGroup)view).getChildAt(i);
                if(childView instanceof ViewGroup){
                    loopOverViewGroup(childView);
                }else{
                    setTypeFace(childView);
                }
            }
        }
    }

    private void setTypeFace(View view){
        if(view instanceof TextView){
            ((TextView)view).setTypeface(Typeface.createFromAsset(getContext().getAssets(), "YOURFONT.ttf"));
            ((TextView)view).setTextColor(getContext().getResources().getColor(Color.WHITE));
        }
    }
}

在首选项活动中设置自定义ttf字体

2 个答案: