如何从我的 Android 应用程序获取崩溃数据？

Question

How can I get crash data (stack traces at least) from my Android application? At least when working on my own device being retrieved by cable, but ideally from any instance of my application running on the wild so that I can improve it and make it more solid.

Answer 1

You might try the ACRA (Application Crash Report for Android) library:

ACRA is a library enabling Android Application to automatically post their crash reports to a GoogleDoc form. It is targetted to android applications developers to help them get data from their applications when they crash or behave erroneously.

It's easy to install in your app, highly configurable and don't require you to host a server script anywhere... reports are sent to a Google Doc spreadsheet !

Answer 2

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.

In a Context (eg the main Activity), call

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");
?>

Answer 3

You can also try [BugSense] ^{Reason: Spam Redirect to another url} . BugSense collects and analyzed all crash reports and gives you meaningful and visual reports. It's free and it's only 1 line of code in order to integrate.

Disclaimer: I am a co-founder

Answer 4

In Android 2.2 it's now possible to automatically get Crash Reports from Android Market Applications:

New bug reporting feature for Android Market apps enables developers to receive crash and freeze reports from their users. The reports will be available when they log into their publisher account.

http://developer.android.com/sdk/android-2.2-highlights.html

Answer 5

It is possible to handle these exceptions with Thread.setDefaultUncaughtExceptionHandler() , however this appears to mess with Android's method of handling exceptions. I attempted to use a handler of this nature:

private class ExceptionHandler implements Thread.UncaughtExceptionHandler {
    @Override
    public void uncaughtException(Thread thread, Throwable ex){
        Log.e(Constants.TAG, "uncaught_exception_handler: uncaught exception in thread " + thread.getName(), ex);

        //hack to rethrow unchecked exceptions
        if(ex instanceof RuntimeException)
            throw (RuntimeException)ex;
        if(ex instanceof Error)
            throw (Error)ex;

        //this should really never happen
        Log.e(Constants.TAG, "uncaught_exception handler: unable to rethrow checked exception");
    }
}

However, even with rethrowing the exceptions, I was unable to get the desired behavior, ie logging the exception while still allowing Android to shutdown the component it had happened it, so I gave up on it after a while.

Answer 6

I see that the question is too old, and hope my answer is helpful for others having the same issue...

Give Crashlytics a try. It will give indepth insight into all the crashes on all the devices having your application and send a notification to you through email..And the best part is its completely free to use..

Answer 7

Ok, well I looked at the provided samples from rrainn and Soonil, and I found a solution that does not mess up error handling.

I modified the CustomExceptionHandler so it stores the original UncaughtExceptionHandler from the Thread we associate the new one. At the end of the new "uncaughtException"- Method I just call the old function using the stored UncaughtExceptionHandler.

In the DefaultExceptionHandler class you need sth. like this:

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();
  }
}

With that modification on the code at http://code.google.com/p/android-remote-stacktrace you have a good working base for logging in the field to your webserver or to sd-card.

Answer 8

Google Play Developers Console actually gives you the Stack traces from those apps that have crashed and had sent the reports, it has also a very good charts to help you see the information, see example below:

Answer 9

I've been using Crittercism for my Android and iOS apps -- heard about them on techcrunch. Pretty happy with them so far!

Answer 10

I made my own version here : http://androidblogger.blogspot.com/2009/12/how-to-improve-your-application-crash.html

It's basically the same thing, but I'm using a mail rather than a http connexion to send the report, and, more important, I added some informations like application version, OS version, Phone model, or avalaible memory to my report...

Answer 11

use this to catch the exception details:

String stackTrace = Log.getStackTraceString(exception); 

store this in database and maintain the log.

Answer 12

Now a days Firebase Crash reports are very popular and easier to use. Please refer following link for more information: Firebase Crash Reporting

Hope it will help you.

Answer 13

You can also use a whole (simple) service for it rather than only library. Our company just released a service just for that: http://apphance.com .

It has a simple .jar library (for Android) that you add and integrate in 5 minutes and then the library gathers not only crash information but also logs from running application, as well as it lets your testers report problems straight from device - including the whole context (device rotation, whether it is connected to a wifi or not and more). You can look at the logs using a very nice and useful web panel, where you can track sessions with your application, crashes, logs, statistics and more. The service is in closed beta test phase now, but you can request access and we give it to you very quickly.

Disclaimer: I am CTO of Polidea, and co-creator of the service.

Answer 14

Thanks resources present in Stackoverflow in helping me to find this answer.

You can find your remotely Android crash reports directly into your email . remmember you have to put your email inside CustomExceptionHandler class .

public static String sendErrorLogsTo = "tushar.pandey@virtualxcellence.com" ;

Steps required :

1st) in onCreate of your activity use this section of your code.

    if(!(Thread.getDefaultUncaughtExceptionHandler() instanceof CustomExceptionHandler)) {
        Thread.setDefaultUncaughtExceptionHandler(new CustomExceptionHandler(this));
    }   

2nd) use this overridden version of CustomExceptionHandler class of ( rrainn ), according to my phpscript.

package com.vxmobilecomm.activity;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import android.app.Activity;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.AsyncTask;
import android.util.Log;

public class CustomExceptionHandler implements UncaughtExceptionHandler {

    private UncaughtExceptionHandler defaultUEH;
    public static String sendErrorLogsTo = "tushar.pandey@virtualxcellence.com" ;

    Activity activity;

    public CustomExceptionHandler(Activity activity) {
        this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
        this.activity = activity;
    }

    public void uncaughtException(Thread t, Throwable e) {

        final Writer result = new StringWriter();
        final PrintWriter printWriter = new PrintWriter(result);
        e.printStackTrace(printWriter);
        String stacktrace = result.toString();
        printWriter.close();
        String filename = "error" + System.nanoTime() + ".stacktrace";

        Log.e("Hi", "url != null");
        sendToServer(stacktrace, filename);

        StackTraceElement[] arr = e.getStackTrace();
        String report = e.toString() + "\n\n";
        report += "--------- Stack trace ---------\n\n";
        for (int i = 0; i < arr.length; i++) {
            report += "    " + arr[i].toString() + "\n";
        }
        report += "-------------------------------\n\n";

        report += "--------- Cause ---------\n\n";
        Throwable cause = e.getCause();
        if (cause != null) {
            report += cause.toString() + "\n\n";
            arr = cause.getStackTrace();
            for (int i = 0; i < arr.length; i++) {
                report += "    " + arr[i].toString() + "\n";
            }
        }
        report += "-------------------------------\n\n";

        defaultUEH.uncaughtException(t, e);
    }

    private void sendToServer(String stacktrace, String filename) {
        AsyncTaskClass async = new AsyncTaskClass(stacktrace, filename,
                getAppLable(activity));
        async.execute("");
    }

    public String getAppLable(Context pContext) {
        PackageManager lPackageManager = pContext.getPackageManager();
        ApplicationInfo lApplicationInfo = null;
        try {
            lApplicationInfo = lPackageManager.getApplicationInfo(
                    pContext.getApplicationInfo().packageName, 0);
        } catch (final NameNotFoundException e) {
        }
        return (String) (lApplicationInfo != null ? lPackageManager
                .getApplicationLabel(lApplicationInfo) : "Unknown");
    }

    public class AsyncTaskClass extends AsyncTask<String, String, InputStream> {
        InputStream is = null;
        String stacktrace;
        final String filename;
        String applicationName;

        AsyncTaskClass(final String stacktrace, final String filename,
                String applicationName) {
            this.applicationName = applicationName;
            this.stacktrace = stacktrace;
            this.filename = filename;
        }

        @Override
        protected InputStream doInBackground(String... params) 
        { 
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(
                    "http://suo-yang.com/books/sendErrorLog/sendErrorLogs.php?");

            Log.i("Error", stacktrace);

            try {
                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
                        6);

                nameValuePairs.add(new BasicNameValuePair("data", stacktrace));
                nameValuePairs.add(new BasicNameValuePair("to",sendErrorLogsTo));
                nameValuePairs.add(new BasicNameValuePair("subject",applicationName));

                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

                HttpResponse response = httpclient.execute(httppost);

                HttpEntity entity1 = response.getEntity();

                BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(
                        entity1);

                is = bufHttpEntity.getContent();

            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            return is;
        }

        @Override
        protected void onPostExecute(InputStream result) {
            super.onPostExecute(result);

            Log.e("Stream Data", getStringFromInputStream(is));
        }
    }

    // convert InputStream to String
    private static String getStringFromInputStream(InputStream is) {

        BufferedReader br = null;
        StringBuilder sb = new StringBuilder();

        String line;
        try {

            br = new BufferedReader(new InputStreamReader(is));
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        return sb.toString();

    }
}

Answer 15

Google Firebase is Google's latest(2016) way to provide you with crash/error data on your phone. Include it in your build.gradle file :

compile 'com.google.firebase:firebase-crash:9.0.0'

Fatal crashes are logged automatically without requiring user input and you can also log non-fatal crashes or other events like so :

try
{

}
catch(Exception ex)
{
    FirebaseCrash.report(new Exception(ex.toString()));
}

Answer 16

There is this android library called Sherlock . It gives you the full report of crash along with device and application information. Whenever a crash occurs, it displays a notification in the notification bar and on clicking of the notification, it opens the crash details. You can also share crash details with others via email or other sharing options.

Installation

android {
    dataBinding {
      enabled = true
    }
}

compile('com.github.ajitsing:sherlock:1.0.0@aar') {
    transitive = true
}

Demo

Answer 17

There is a tool called fabric, this is a crash analytic tool, which will allow you to get crash reports , when application deployed live and during development. Adding this tool to your application was simple as well.. When your application crash that report of the crash can be viewed from your fabric.io dashboard . thw report was catched automatically.it won't ask user for permission. Whether he/she want to send the bug/crash report. And this is completely free... https://get.fabric.io/

Answer 18

While many of the answers on this page are useful, it is easy for them to become out of date. The AppBrain website aggregates statistics which allow you to find the most popular crash reporting solution that is current:

Android crash reporting libraries

You can see that at the time of posting this picture, Crashlytics is used in 5.24% of apps and 12.38% of installs.

Answer 19

这是非常粗暴的，但是可以在任何地方运行 logcat，所以一个快速而肮脏的黑客是添加到任何 catch 块getRuntime().exec("logcat >> /sdcard/logcat.log");

Answer 20

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 .

Answer 21

If you want answers immediately you can use logcat

$adb shell logcat -f /sdcard/logoutput.txt *:E

If there's too much junk in your log right now, try clearing it first.

$adb shell logcat -c

Then try running your app then logcat again.

Answer 22

I found one more great web application to track the error reports.

https://mint.splunk.com/

Small number of steps to configure.

1. Login or sign up and configure using the above link. Once you done creating a application they will provide a line to configure like below.

 Mint.initAndStartSession(YourActivity.this, "api_key");

2. Add the following in the application's build.gradl.

 android { ... repositories { maven { url "https://mint.splunk.com/gradle/"} } ... } dependencies { ... compile "com.splunk.mint:mint:4.4.0" ... }

3. Add the code which we copied above and add it to every activity.

   Mint.initAndStartSession(YourActivity.this, "api_key");

That's it. You login and go to you application dashboard, you will get all the error reports.

Hope it helps someone.

Answer 23

For an alternate crash reporting/exception tracking service check out Raygun.io - it's got a bunch of nice logic for handling Android crashes, including decent user experience when plugging it in to your app (two lines of code in your main Activity and a few lines of XML pasted into AndroidManifest).

When your app crashes, it'll automatically grab the stack trace, environment data for hard/software, user tracking info, any custom data you specify etc. It posts it to the API asynchronously so no blocking of the UI thread, and caches it to disk if there's no network available.

Disclaimer: I built the Android provider :)

Answer 24

Just Started to use ACRA https://github.com/ACRA/acra using Google Forms as backend and it's very easy to setup & use, it's the default.

BUT Sending reports to Google Forms are going to be deprecated (then removed):https://plus.google.com/118444843928759726538/posts/GTTgsrEQdN6 https://github.com/ACRA/acra/wiki/Notice-on-Google-Form-Spreadsheet-usage

Anyway it's possible to define your own sender https://github.com/ACRA/acra/wiki/AdvancedUsage#wiki-Implementing_your_own_sender you can give a try to email sender for example.

With minimum effort it's possible to send reports to bugsense: http://www.bugsense.com/docs/android#acra

NB The bugsense free account is limited to 500 report/month

Answer 25

Late to the party, I support and believe ACRA is the best option among all. Its easy to setup and configure. I have created a detailed guide with inputs from all over to fetch the crash report using ACRA and mail the same to my email address using MandrillAp.

Link to post: https://androidician.wordpress.com/2015/03/29/sending-crash-reports-with-acra-over-email-using-mandrill/

Link to sample project on github: https://github.com/ayushhgoyal/AcraSample

Answer 26

I'm one of the founders of Bugsnag which we designed for exactly this purpose. Bugsnag automatically captures unhandled exceptions in Android apps and sends them to our dashboard, where you can prioritize fixes and dive into diagnostic information.

Here are some important things to consider when selecting or building a crash reporting system, along with some code snippets:

• Detects unhandled exceptions automatically ( example code )
• Collects diagnostic data such as memory usage, device info, etc ( example code )
• Effectively groups crashes together by root cause
• Allows you to track actions the user took before each crash to help reproduce ( example code )

If you want to see some best practices around crash handling/reporting on Android you can check out the full source code for Bugsnag's crash reporting library which is fully open source, feel free to tear this apart and use it in your own applications!

Answer 27

Google changed how much crash reports you actually get. Previously you only got manual reported bug reports.

Since the last developer conference and the introducation of Android Vitals you also get crash reports from users which have enabled to share diagnostics data.

You'll see all crashes collected from Android devices whose users have opted in to automatically share usage and diagnostics data. Data is available for the previous two months.

View crashes & application not responding (ANR) errors

Answer 28

Flurry analytics gives you crash info, hardware model, android version and live app usage stats. In the new SDK they seem to provide more detailed crash info http://www.flurry.com/flurry-crash-analytics.html .

Answer 29

You can do this directly in Android Studio. Just connect your phone, run the app, let it crash and you can view the stacktrace directly in Android Studio.

Answer 30

If your app is being downloaded by other people and crashing on remote devices, you may want to look into an Android error reporting library (referenced in this SO post ). If it's just on your own local device, you can use LogCat. Even if the device wasn't connected to a host machine when the crash occurred, connected the device and issuing an adb logcat command will download the entire logcat history (at least to the extent that it is buffered which is usually a loooot of log data, it's just not infinite). Do either of those options answer your question? If not can you attempt to clarify what you're looking for a bit more?