Android AlertDialog标题字体 [英] Android AlertDialog title font

问题描述

我正在尝试更改android.support.v7.app.AlertDialog标题文本的字体.

I am trying to change the font of android.support.v7.app.AlertDialogtitle text.

方法1:

   TextView title = (TextView) dialog.findViewById(android.R.id.title); //returns null

方法2:

   final int titleId = context.getResources().getIdentifier("alertTitle", "id", "android");
   TextView title = (TextView) dialog.findViewById(titleId); //Also returns null.

还有其他获取标题TextView的方法吗?

Is there any other way to get the title TextView?

请注意，我不想使用自定义布局.

Please note I do not want to use a custom layout.

谢谢.

推荐答案

我使用此解决方案使其工作:

    final AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context);  

    Typeface tf = //get the typeface.
    CustomTFSpan tfSpan = new CustomTFSpan(tf);
    SpannableString spannableString = new SpannableString(title);
    spannableString.setSpan(tfSpan, 0, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    alertBuilder.setTitle(spannableString);

    AlertDialog dialog = alertBuilder.create();
    dialog.show();

CustomTFSpan

public class CustomTFSpan extends TypefaceSpan {

  private Typeface typeface;

  public CustomTFSpan(Typeface typeface) {
    super("");
    this.typeface = typeface;
  }

  @Override
  public void updateDrawState(TextPaint ds) {
    applyTypeFace(ds, typeface);
  }

  @Override
  public void updateMeasureState(TextPaint paint) {
    applyTypeFace(paint, typeface);
  }

  private static void applyTypeFace(Paint paint, Typeface tf) {
    paint.setTypeface(tf);
  }
}

这篇关于Android AlertDialog标题字体的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！