java - 如何在 Android 中将字符串中的双行替换为单行？

Question

我有一个字符串:

 This is a test sentence 1.
 This is a test sentence 2.
 This is a test sentence 3.

 This is a test sentence 4.

 This is a test sentence 5.

我想用单行替换双行间隙。如:

 This is a test sentence 1.
 This is a test sentence 2.
 This is a test sentence 3.
 This is a test sentence 4.
 This is a test sentence 5.

但是，我不知道如何检测双换行符，“\n”在替换单换行符时有效，但我在替换函数中尝试了“\n\n”但没有成功。

textView.setText(string.replaceAll("\n\n","\n"));

Answer 1

您可以使用:

str.replaceAll("[\r\n]+", "\n") 

来源:Remove multiple linebreaks