Proguard Stack in Crashlytics

Question

I have several recurrent logs in Crashlytics that I can't read.

java.lang.NullPointerException
   at ahm.onClick(SourceFile:239)
   at android.view.View.performClick(View.java:4212)
   at android.view.View$PerformClick.run(View.java:17476)
   at android.os.Handler.handleCallback(Handler.java:800)
   at android.os.Handler.dispatchMessage(Handler.java:100)
   at android.os.Looper.loop(Looper.java:194)
   at android.app.ActivityThread.main(ActivityThread.java:5431)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:525)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
   at dalvik.system.NativeStart.main(NativeStart.java)

AND

java.lang.NullPointerException
   at com.app.mobile.RutaActivity.a(SourceFile:747)
   at ahh.run(SourceFile:1055)
   at java.lang.Thread.run(Thread.java:856)

In the first log, the name of my app's package is never mentioned, so I don't even know where to look for my NPE.

In the second log, I have the FileName (RutaActivity) but when I look at the line number, I see no place for a NPE bug...

How can I do? How can I do in the second log to see the method name instead of a?

My Proguard file:

##---------------Begin: proguard configuration common for all Android apps ----------
-optimizationpasses 5
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-dump class_files.txt
-printseeds seeds.txt
-printusage unused.txt
-printmapping mapping.txt

-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-allowaccessmodification
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable, LocalVariableTable,LocalVariableTypeTable
-repackageclasses ''


-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-dontnote com.android.vending.licensing.ILicensingService

-keep public class * extends android.view.View {
    public <init>(android.content.Context);
    public <init>(android.content.Context, android.util.AttributeSet);
    public <init>(android.content.Context, android.util.AttributeSet, int);
    public void set*(...);
}

# Explicitly preserve all serialization members. The Serializable interface
# is only a marker interface, so it wouldn't save them.
-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}


# Preserve all native method names and the names of their classes.
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclassmembers class * extends android.content.Context {
   public void *(android.view.View);
   public void *(android.view.MenuItem);
}

-keepclassmembers class * {
    @android.webkit.JavascriptInterface <methods>;
}


-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}


-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}


# Preserve static fields of inner classes of R classes that might be accessed
# through introspection.
-keepclassmembers class **.R$* {
  public static <fields>;
}


##---------------End: proguard configuration common for all Android apps ----------


##---------------Begin: proguard configuration for Gson  ----------
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature


# Gson specific classes
-keep class sun.misc.Unsafe { *; }

# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { *; }


##---------------End: proguard configuration for Gson  ----------

##---------------Begin proguard configuration for Google Maps --------------------

-keep class com.google.android.gms.** { *; }
-dontwarn com.google.android.gms.**

-keep class org.** { *; }
-keep class * extends java.util.ListResourceBundle {
    protected Object[][] getContents();
}

-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
    public static final *** NULL;
}

-keepnames @com.google.android.gms.common.annotation.KeepName class *
-keepclassmembernames class * {
    @com.google.android.gms.common.annotation.KeepName *;
}


-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable

##---------------End proguard configuration for Google Maps --------------------

##---------------Begin proguard configuration for my libs  -----------------------
-keep class com.todddavies.components.progressbar.** { *; }
-dontwarn com.todddavies.components.progressbar.**

-dontwarn org.apache.**

-keepclassmembers class * implements android.os.Parcelable {
    static ** CREATOR;
}

#Disable logging

-assumenosideeffects class android.util.Log {
    public static *** d(...);
    public static *** v(...);
    public static *** i(...);
}
-keep class com.app.mobile.vo.Captura { *; }
-keep class com.app.mobile.vo.Formulario { *; }
-keep class com.app.mobile.vo.Metrica { *; }
-keep class com.app.mobile.vo.Pdv { *; }
-keep class com.app.mobile.vo.Proyecto { *; }
-keep class com.app.mobile.vo.Producto { *; }
-keep class com.app.mobile.vo.Nota { *; }
-keep class com.app.mobile.vo.Encuesta { *; }
-keep class com.app.mobile.vo.Usuario { *; }
-keep class com.app.mobile.vo.BambooPerf { *; }
-keep class com.app.mobile.vo.SoftwareVersion { *; }

Solution 1

I contact Crashlytics support, and I resolved the problem!

They told me to check Crashlytics.log:

On Linux / Windows: ~/.crashlytics/com.crashlytics.tools/crashlytics.log

On Mac: ~/Library/Caches/com.crashlytics/com.crashlytics.tools/crashlytics.log

Here I saw that:

Crashlytics detected deobfuscation, but did not find a mapping file at /Users/admin/AndroidstudioProjects/MyApp/build/outputs/mapping/release/mapping.txt

So I just changed

-printmapping mapping.txt

to

-printmapping build/outputs/mapping/release/mapping.txt

and it worked!

Tx for you help !

Solution 2

I just have the following 2 lines in my Proguard file for Crashlytics:

-keep class com.crashlytics.** { *; }
-keepattributes SourceFile,LineNumberTable

Comments

[njzk2]

use retrace.jar with the mapping file from proguard to recreate a readable stacktrace : proguard.sourceforge.net/manual/retrace/examples.html

[njzk2]

also, crashlytics is supposed to be able to read stacktraces, provided that you give it the mappings.txt file with the apk

[Alexizamerican]

Have you tried removing -printmapping mapping.txt from your Proguard file?

[Ganesh Krishnan]

Thanks for update. This issue was driving me crazy as I had setup everything but still the code was obfuscated on the crashlytics site

[Renan Ferrari]

This is the right answer, but I should add that it doesn't work if you're using product flavors. Deleting the -printmapping line should be a better option in this case.

[Dharmendra]

We should remove -printmapping from proguard file. reference link docs.fabric.io/android/crashlytics/dex-and-proguard.html,

[algrid]

@Dharmendra wouldn't it prevent us from having proper source file names if we use "-renamesourcefileattribute SourceFile" at the same time?