参数说明: Spannable.SPAN_EXCLUSIVE_EXCLUSIVE API里面解释:Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand to include text inserted at either their starting or ending point. They can never have a length of 0 and are automatically removed from the buffer if all the text they cover is removed. 即在原文本头或尾追加新文本的样式不受原文本样式影响,原文本高亮,新追加文本不高亮。
Spannable.SPAN_EXCLUSIVE_INCLUSIVE API里面解释:Non-0-length spans of type SPAN_INCLUSIVE_EXCLUSIVE expand to include text inserted at their ending point but not at their starting point. When 0-length, they behave like points. 即在原文本尾追加新文本的样式受原文本样式影响,原来文本尾高亮,新追加文本也高亮。