android - 在 DialogFragment 中更改 ProgressDialog 的字体

Question

请问是否可以在 DialogFragment 中更改 ProgressDialog 消息显示的字体？

public class LoadFromCloudTaskFragment extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        this.progressDialog = new ProgressDialog(this.getActivity());
        this.progressDialog.setMessage(progressMessage);
        this.progressDialog.setCanceledOnTouchOutside(false);

        return progressDialog;
    }

通过从 ProgressDialog 继承来创建自定义类可能是其中一种方法。但是，我想知道有没有更好的选择？遗憾的是，我们没有 ProgressDialog.Builder。

我尝试过的替代方案之一是

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    this.progressDialog = new ProgressDialog(this.getActivity());
    this.progressDialog.setMessage(progressMessage);
    this.progressDialog.setCanceledOnTouchOutside(false);

    Utils.setCustomFont(this.progressDialog.findViewById(android.R.id.message), Utils.ROBOTO_LIGHT_FONT);

    return progressDialog;
}

但这会给我错误

android.util.AndroidRuntimeException: requestFeature() must be called before adding content

Answer 1

Typeface font = Typeface.createFromAsset(getContext().getAssets(), "fonts/Roboto-Regular.ttf");
SpannableStringBuilder spannableSB = new SpannableStringBuilder(getString(R.string.text_please_wait));
spannableSB.setSpan (new CustomTypefaceSpan("fonts/Roboto-Regular.ttf", font), 0, spannableSB.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
loadDialog = ProgressDialog.show(this, null, spannableSB, true, false);

---

public class CustomTypefaceSpan extends TypefaceSpan {

    private final Typeface newType;

    public CustomTypefaceSpan(String family, Typeface type) {
       super(getContext(),family);
       newType = type;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
         applyCustomTypeFace(ds, newType);
    }

    @Override
    public void updateMeasureState(TextPaint paint) {
        applyCustomTypeFace(paint, newType);
    }

    private static void applyCustomTypeFace(Paint paint, Typeface tf) {
        int oldStyle;
        Typeface old = paint.getTypeface();
        if (old == null) {
            oldStyle = 0;
        } else {
            oldStyle = old.getStyle();
        }

        int fake = oldStyle & ~tf.getStyle();
        if ((fake & Typeface.BOLD) != 0) {
            paint.setFakeBoldText(true);
        }

        if ((fake & Typeface.ITALIC) != 0) {
            paint.setTextSkewX(-0.25f);
        }

        paint.setTypeface(tf);
    }
}