java - Android 中的字符计数

Question

我需要计算单词数。从字符“>”开始到“:”

例如:我有这行:>用户说:大家好

我想知道如何计算以“>”开始并以“:”结束的选择总数

实际上，我的Java代码是:

String groupMessage = new String("> User says : Hi people");
String search = new String(">");


TextView groupMessageBox = (TextView) this
        .findViewById(R.id.groupMessageBox);

Spannable WordtoSpan = new SpannableString(groupMessage);

int length = search.length();
String input = WordtoSpan.toString();
int startIndex = input.indexOf(search);
while(startIndex > length)
{
    WordtoSpan.setSpan(new ForegroundColorSpan(Color.rgb(140, 117, 189)), startIndex, startIndex + length,
            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    WordtoSpan.setSpan(new StyleSpan(Typeface.BOLD), startIndex, startIndex + length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    startIndex = input.indexOf(search, startIndex + length);
}
groupMessageBox.setText(WordtoSpan);

有人可以帮助我吗？问候

Answer 1

这应该有效:

int length = groupMessage.indexOf(":") - groupMessage.indexOf(">") - 1;

它计算 > 和 : 之间的每个字符(包括空格)。