如何从Web服务中删除无法识别的字符？ [英] How do I remove unrecognized characters which come back from a web service?

问题描述

我正在开发一个调用休息Web服务的应用程序。有时，xml响应包含手机无法显示的字符。显示这些字符时，会显示一个空白框。我想过滤掉这些字符。如何检测人物是否能够在屏幕上显示？

某些特定字符包括：

http://www.fileformat.info/info/unicode/ char / 0094 / index.htm
http ：//www.fileformat.info/info/unicode/char/0080/index.htm
http://www.fileformat.info/info/unicode/char/0092/index.htm

解决方案

Android支持以下编码

• Xml.Encoding ISO_8859_1


• Xml.Encoding US_ASCII


• Xml.Encoding UTF_16


• Xml.Encoding UT F_8

US_ASCII不应该有任何问题。

对于ISO_8859_1你请检查 http://en.wikipedia.org/wiki/ISO/IEC_8859-1
用于控制字符0x00-0x1f和0x7f-0x9f并进行过滤。
当然使用匹配的字体。

使用UTF_8或16更复杂，请阅读Joels 绝对最小的每个软件开发人员绝对必须了解Unicode和字符集

你可能会发现这个邮件的列表有用。

I am working on an app which calls a rest web service. Sometimes the xml responses contain characters which the phone can not display. When displaying these characters, an empty box is displayed instead. I would like to filter out these characters. How can I detect if a character will be able to be displayed on the screen?

Some specific characters include:

http://www.fileformat.info/info/unicode/char/0094/index.htm http://www.fileformat.info/info/unicode/char/0080/index.htm http://www.fileformat.info/info/unicode/char/0092/index.htm

解决方案

Android support the following encodings

• Xml.Encoding ISO_8859_1
• Xml.Encoding US_ASCII
• Xml.Encoding UTF_16
• Xml.Encoding UTF_8

US_ASCII shouldn't make any problems.

For ISO_8859_1 you sould check http://en.wikipedia.org/wiki/ISO/IEC_8859-1 for control chars 0x00-0x1f and 0x7f-0x9f and filter them. And of course use a matching font.

Using UTF_8 or 16 is more complex, read Joels The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets

You might find this mailing list useful.

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