How to get Android crash logs?

Question

I have an app that is not in the market place (signed with a debug certificate), but would like to get crash log data, whenever my application crashes. Where can I find a log of why my app crashed?

Answer 1

You can use ACRA from this. Including this library to your projects and configuring it, you could receive (into your email or gdocs) their crash reports. Sorry for my bad English.

Answer 2

The way to do this is to implement the Thread.UncaughtExceptionHandler interface and pass it to Thread.setDefaultUncaughtExceptionHandler() at the beginning of your Activity's onCreate(). Here is the implementation class TopExceptionHandler.

public class TopExceptionHandler implements Thread.UncaughtExceptionHandler {
    private Thread.UncaughtExceptionHandler defaultUEH;
    private Activity app = null;

    public TopExceptionHandler(Activity app) {
        this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
        this.app = app;
    }

    public void uncaughtException(Thread t, Throwable e) {
        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";

        // If the exception was thrown in a background thread inside
        // AsyncTask, then the actual exception can be found with getCause

        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";

        try {
            FileOutputStream trace = app.openFileOutput("stack.trace", 
                                                        Context.MODE_PRIVATE);
            trace.write(report.getBytes());
            trace.close();
        } catch(IOException ioe) {
        // ...
        }

        defaultUEH.uncaughtException(t, e);
    }
}

Note We let the Android framework's defaultUEH to handle it.

At the top of your Activity register an instance of above class like this:

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

Thread.setDefaultUncaughtExceptionHandler(new TopExceptionHandler(this));
...

This handler saves the trace in a file. When ReaderScope restarts next time, it detects the file and prompts the user if he/she wants to email it to the developer.

To Email the Stack Trace, execute following code to pack it in an email.

try {
    BufferedReader reader = new BufferedReader(
        new InputStreamReader(ReaderScopeActivity.this.openFileInput("stack.trace")));
    while((line = reader.readLine()) != null) {
        trace += line+"\n";
    }
} catch(FileNotFoundException fnfe) {
    // ...
} catch(IOException ioe) {
    // ...
}

Intent sendIntent = new Intent(Intent.ACTION_SEND);
String subject = "Error report";
String body = "Mail this to [e-mail]: " + "\n" + trace + "\n";

sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[] {"[e-mail]"});
sendIntent.putExtra(Intent.EXTRA_TEXT, body);
sendIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
sendIntent.setType("message/rfc822");

ReaderScopeActivity.this.startActivity(Intent.createChooser(sendIntent, "Title:"));

ReaderScopeActivity.this.deleteFile("stack.trace");

Or you can also use ACRA Error Reporting System.Just Include the ACRA.jar in your project libs and use the below code snippet before your launcher activity class declaration

@ReportsCrashes(formKey = "", mailTo = "[e-mail];[e-mail]", mode = ReportingInteractionMode.SILENT) 

or You can try this from console:-

adb logcat -b crash 

Answer 3

If you're using Eclipse, make sure you use debug and not run. Make sure you are in the debug perspective (top right) You may have to hit 'Resume' (F8) a few times for the log to print. The crash log will be in the Logcat window at the bottom- double click for fullscreen and make sure you scroll to the bottom. You'll see red text for errors, the crash trace will be something like

09-04 21:35:15.228: ERROR/AndroidRuntime(778): Uncaught handler: thread main exiting due to uncaught exception
09-04 21:35:15.397: ERROR/AndroidRuntime(778): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dazlious.android.helloworld/com.dazlious.android.helloworld.main}: java.lang.ArrayIndexOutOfBoundsException
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2268) 
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2284)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.ActivityThread.access$1800(ActivityThread.java:112)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.os.Looper.loop(Looper.java:123)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.ActivityThread.main(ActivityThread.java:3948)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at java.lang.reflect.Method.invokeNative(Native Method)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at java.lang.reflect.Method.invoke(Method.java:521)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at dalvik.system.NativeStart.main(Native Method)
09-04 21:35:15.397: ERROR/AndroidRuntime(778): Caused by: java.lang.ArrayIndexOutOfBoundsException
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at com.example.android.helloworld.main.onCreate(main.java:13)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2231)
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     ... 11 more

The important parts for this one are

09-04 21:35:15.397: ERROR/AndroidRuntime(778): Caused by: java.lang.ArrayIndexOutOfBoundsException
09-04 21:35:15.397: ERROR/AndroidRuntime(778):     at com.example.android.helloworld.main.onCreate(main.java:13)

those tell us it was an array out of bounds exception on on line 13 of main.java in the onCrate method.

Answer 4

Use acra crash reporter for android app..Acra lib

Answer 5

Here is another solution for Crash Log.

Android market has tool named "Crash Collector"

check following link for more information

http://kpbird.blogspot.com/2011/08/android-application-crash-logs.html

Answer 6

1) Plug in Phone through USB (w/ Developer Debugging options enabled)

2) Open Terminal and Navigate to your Android SDK (for Mac):

cd ~/Library/Android/sdk/platform-tools

3) Logcat from that directory (in your terminal) to generate a constant flow of logs (for Mac):

./adb logcat

4) Open your app that crashes to generate crash logs

5) Ctrl+C to stop terminal and look for the logs associated with the app that crashes. It may say something like the following:

AndroidRuntime: FATAL EXCEPTION: main