自定义视图中的TextView不会在夜间模式下切换文本颜色

<resources>
    <color name="text_color_day">#000000</color>
    <color name="text_color_night">#FFFFFF</color>
</resources>

<resources>
    <color name="text_color_day">#FFFFFF</color>
    <color name="text_color_night">#000000</color>
</resources>

public class CustomTextView extends TextView {
    public CustomTextView(Context context) {
        super(context);
        init();
    }

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

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

    private void init() {
        updateTextColor();
    }

    private void updateTextColor() {
        int textColor = getResources().getColor(isNightMode() ? R.color.text_color_night : R.color.text_color_day);
        setTextColor(textColor);
    }

    private boolean isNightMode() {
        return (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES;
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        AppCompatDelegate.getDefaultNightMode();
        updateTextColor();
    }
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if (newConfig.uiMode != Configuration.UI_MODE_NIGHT_NO && newConfig.uiMode != Configuration.UI_MODE_NIGHT_UNDEFINED) {
        // 夜间模式
        updateTextViewColor(true);
    } else {
        // 日间模式
        updateTextViewColor(false);
    }
}

private void updateTextViewColor(boolean isNightMode) {
    int textColor = isNightMode ? R.color.text_color_night : R.color.text_color_day;
    customTextView.setTextColor(getResources().getColor(textColor));
}