有 e.printStackTrace（）方法来打印特殊的错误，所以我想将整个异常字符串，并显示通过 Toast.makeText（） 我怎样才能做到这一点？ 如果有更多的替代想法，那么请与我分享或暗示我。

There are e.printStackTrace() method to print exceptional error, so I would like to take entire exception in String and show it by Toast.makeText() How can i do this? If there are more alternate idea, then please share with me or suggest me.

推荐答案

使用下面这段code：

Use the following piece of code:

Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
exception.printStackTrace(printWriter);
String s = writer.toString();

＆NBSP;

更新（过时，见下文）

正如他的回答指出通过@BlackRider有一种方法来提取异常堆栈跟踪到的字符串（，但在Android 4.x的它并不总是可靠的，检查更新2以下的）：

As pointed by @BlackRider in his answer there is a way to extract an exception stacktrace into the String (but on Android 4.x it's not always reliable, check Update 2 below):

String stackTrace = Log.getStackTraceString(exception);

更新2

不过从Android 4.0的（API 14）开始， Log.getStackTraceString 方法是不可靠的了，因为的它返回一个空字符串为的UnknownHostException （见的Andr​​oid 问题＃21436 了解细节，简而言之就是：减少量日志喷出的应用程序在做网络正在恕我直言，一个可疑的决定，修改 Log.getStackTraceString 法）不可用的Andr​​oid工程师的非错误状态。 因此，它仍然是最好使用code我提供在这篇文章的开头。

But starting from Android 4.0 (API 14) Log.getStackTraceString method is not reliable anymore, as it returns an empty string for UnknownHostException (see Android issue #21436 for the details, in short: "to reduce the amount of log spew that apps do in the non-error condition of the network being unavailable" Android engineers made imho a dubious decision to modify Log.getStackTraceString method). Thus it's still better to use the code I provided at the beginning of this post.