如何改变文本视图中文本在两个星号ie内的字体**这里**

Question

我有一个edittext，我从用户I那里获得文本，我希望如果用户的输入包含两个星号，两边和文本将在(****)之间。所以我想改变之间的文本的字体，我该怎么做呢？

例如，在StackOverflow中，如果将两个星号或星号放入，则会得到如下粗体文本--粗体文本位于两个星号之间。在这篇文章中你看不到星星或星号，但它是。

你可以在下面看到我的例子：

String userInput = "This is the Normal text 
**And this the text I want to in different font**
and again normal text and **Now Again the text the user want to in
different font** "

Answer 1

请尝试使用下面的方式

    String text = "this is the text *Android* for developer test";
                SpannableStringBuilder strspan = new SpannableStringBuilder(text);
                int start = text.toString().indexOf("**",0)+2;
                int end = text.toString().indexOf("**",start); //or  int end = text.toString().lastIndexOf("**");
                Typeface font = ResourceUtils.getFont(R.font.avenirnextltprodemi);
                strspan.setSpan(new CustomTypefaceSpan("", font), start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE);

yourtextview.setText(strspan);


public class CustomTypefaceSpan extends TypefaceSpan {

private final Typeface newType;

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

}

希望对你有帮助