如何从我的Android应用程序中获得崩溃数据(至少堆栈跟踪)?至少在我自己的设备上工作时可以通过电缆检索,但理想的情况是,从我的应用程序在野外运行的任何实例中都可以,这样我就可以改进它,使它更可靠。
当前回答
For sample applications and debugging purposes, I use a simple solution that allows me to write the stacktrace to the sd card of the device and/or upload it to a server. This solution has been inspired by Project android-remote-stacktrace (specifically, the save-to-device and upload-to-server parts) and I think it solves the problem mentioned by Soonil. It's not optimal, but it works and you can improve it if you want to use it in a production application. If you decide to upload the stacktraces to the server, you can use a php script (index.php) to view them. If you're interested, you can find all the sources below - one java class for your application and two optional php scrips for the server hosting the uploaded stacktraces.
在上下文中(例如主活动),调用
if(!(Thread.getDefaultUncaughtExceptionHandler() instanceof CustomExceptionHandler)) {
Thread.setDefaultUncaughtExceptionHandler(new CustomExceptionHandler(
"/sdcard/<desired_local_path>", "http://<desired_url>/upload.php"));
}
CustomExceptionHandler
public class CustomExceptionHandler implements UncaughtExceptionHandler {
private UncaughtExceptionHandler defaultUEH;
private String localPath;
private String url;
/*
* if any of the parameters is null, the respective functionality
* will not be used
*/
public CustomExceptionHandler(String localPath, String url) {
this.localPath = localPath;
this.url = url;
this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
}
public void uncaughtException(Thread t, Throwable e) {
String timestamp = TimestampFormatter.getInstance().getTimestamp();
final Writer result = new StringWriter();
final PrintWriter printWriter = new PrintWriter(result);
e.printStackTrace(printWriter);
String stacktrace = result.toString();
printWriter.close();
String filename = timestamp + ".stacktrace";
if (localPath != null) {
writeToFile(stacktrace, filename);
}
if (url != null) {
sendToServer(stacktrace, filename);
}
defaultUEH.uncaughtException(t, e);
}
private void writeToFile(String stacktrace, String filename) {
try {
BufferedWriter bos = new BufferedWriter(new FileWriter(
localPath + "/" + filename));
bos.write(stacktrace);
bos.flush();
bos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private void sendToServer(String stacktrace, String filename) {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
nvps.add(new BasicNameValuePair("filename", filename));
nvps.add(new BasicNameValuePair("stacktrace", stacktrace));
try {
httpPost.setEntity(
new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
httpClient.execute(httpPost);
} catch (IOException e) {
e.printStackTrace();
}
}
}
upload.php
<?php
$filename = isset($_POST['filename']) ? $_POST['filename'] : "";
$message = isset($_POST['stacktrace']) ? $_POST['stacktrace'] : "";
if (!ereg('^[-a-zA-Z0-9_. ]+$', $filename) || $message == ""){
die("This script is used to log debug data. Please send the "
. "logging message and a filename as POST variables.");
}
file_put_contents($filename, $message . "\n", FILE_APPEND);
?>
index . php
<?php
$myDirectory = opendir(".");
while($entryName = readdir($myDirectory)) {
$dirArray[] = $entryName;
}
closedir($myDirectory);
$indexCount = count($dirArray);
sort($dirArray);
print("<TABLE border=1 cellpadding=5 cellspacing=0 \n");
print("<TR><TH>Filename</TH><TH>Filetype</th><th>Filesize</TH></TR>\n");
for($index=0; $index < $indexCount; $index++) {
if ((substr("$dirArray[$index]", 0, 1) != ".")
&& (strrpos("$dirArray[$index]", ".stacktrace") != false)){
print("<TR><TD>");
print("<a href=\"$dirArray[$index]\">$dirArray[$index]</a>");
print("</TD><TD>");
print(filetype($dirArray[$index]));
print("</TD><TD>");
print(filesize($dirArray[$index]));
print("</TD></TR>\n");
}
}
print("</TABLE>\n");
?>
其他回答
好吧,我看了rrainn和Soonil提供的样本,我找到了一个解决方案 这不会破坏错误处理。
我修改了CustomExceptionHandler,以便它从我们关联的新线程中存储原始的UncaughtExceptionHandler。在新的“uncaughtException”的末尾- 方法,我只是使用存储的UncaughtExceptionHandler调用旧函数。
在DefaultExceptionHandler类中,你需要这样的东西:
public class DefaultExceptionHandler implements UncaughtExceptionHandler{
private UncaughtExceptionHandler mDefaultExceptionHandler;
//constructor
public DefaultExceptionHandler(UncaughtExceptionHandler pDefaultExceptionHandler)
{
mDefaultExceptionHandler= pDefaultExceptionHandler;
}
public void uncaughtException(Thread t, Throwable e) {
//do some action like writing to file or upload somewhere
//call original handler
mStandardEH.uncaughtException(t, e);
// cleanup, don't know if really required
t.getThreadGroup().destroy();
}
}
在http://code.google.com/p/android-remote-stacktrace上对代码进行了修改 你有一个很好的工作基地,登录到你的web服务器或 sd卡。
We use our home-grown system inside the company and it serves us very well. It's an android library that send crash reports to server and server that receives reports and makes some analytics. Server groups exceptions by exception name, stacktrace, message. It helps to identify most critical issues that need to be fixed. Our service is in public beta now so everyone can try it. You can create account at http://watchcat.co or you can just take a look how it works using demo access http://watchcat.co/reports/index.php?demo.
我是Bugsnag的创始人之一,我们正是为此目的而设计的。Bugsnag自动捕获Android应用程序中未处理的异常,并将它们发送到我们的仪表板,在那里您可以优先修复并深入诊断信息。
以下是在选择或构建崩溃报告系统时需要考虑的一些重要事项,以及一些代码片段:
自动检测未处理的异常(示例代码) 收集诊断数据,如内存使用情况、设备信息等(示例代码) 根据根本原因有效地将崩溃组合在一起 允许您跟踪用户在每次崩溃前采取的操作,以帮助重现(示例代码)
如果你想在Android上看到一些关于崩溃处理/报告的最佳实践,你可以查看Bugsnag的崩溃报告库的完整源代码,它是完全开源的,可以自由地把它拆开,并在你自己的应用程序中使用!
谷歌Play开发者控制台实际上为你提供了那些已经崩溃和发送报告的应用程序的堆栈跟踪,它也有一个非常好的图表来帮助你查看信息,参见下面的例子:
你可以试试ACRA (Android应用程序崩溃报告)库:
ACRA是一个库,使Android应用程序自动张贴他们的崩溃报告到GoogleDoc的形式。它是针对android应用程序开发人员,帮助他们从他们的应用程序崩溃或行为错误时获取数据。
它很容易安装在你的应用程序中,高度可配置,不需要你在任何地方托管服务器脚本…报告被发送到谷歌文档电子表格!
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