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I need help so that my app can run in version 4.4 or lower since I am doing the test in the emulator called nox player and it crested me taking the following log (attached file) as you can see it is a mistake in the library, I have installed the last version, here the line of my gradle compile 

('com.crashlytics.sdk.android:crashlytics:2.9.1@aar') {
         transitive = true;
     }

I also show you how I have my proguard file configured

you are with the lines

-keepattributes * Annotation *
-keepattributes SourceFile, LineNumberTable
-keep public class * extends java.lang.Exception
-keep class com.crashlytics. ** {*; }
-dontwarn com.crashlytics. **
Jose Miguel
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  • Mike from Fabric here. We support API 8 and higher. I saw your email into our support channel. The crash appears to be a crash from the app and not our SDK. It looks like you have a casting conflict in regards to the layouts you're using. – Mike Bonnell Mar 19 '18 at 00:43
  • is that this block only appears in Android 4.4, I do not know the truth because if I take the sdk from the gradle, the app runs smoothly, you could guide me a little more please that could be generating this in this specific version ?, thanks – Jose Miguel Mar 20 '18 at 03:52
  • I'm sorry, I don't understand what you're asking. – Mike Bonnell Mar 20 '18 at 14:06
  • sorry I could solve it thanks to your previous answer, I started to look at the generation options and if it was something of the start of the app, thank you. (Y) – Jose Miguel Mar 20 '18 at 16:52
  • Glad to hear it. If you can share your solution as an answer, that'd be appreciated. – Mike Bonnell Mar 21 '18 at 00:44

1 Answers1

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I had the similar issue. I was able to overcame the issue by enabling Multidex support for android 4.4 target:
Enable multidex for apps with over 64K methods

us_david
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