Question

使用ProGuard和snowplow库[0]时，我们的Android应用会收到java.lang.NoClassDefFoundError，并显示以下错误消息：

--------- beginning of crash
E/AndroidRuntime(10137): FATAL EXCEPTION: Thread-573
E/AndroidRuntime(10137): Process: com.appier.tracker.android.demo, PID: 10137
E/AndroidRuntime(10137): java.lang.NoClassDefFoundError: <clinit> failed for class com.snowplowanalytics.snowplow.tracker.android.Util; see     exception in other thread    
E/AndroidRuntime(10137):        at com.snowplowanalytics.snowplow.tracker.android.Subject$1.run(Unknown Source)    
E/AndroidRuntime(10137):        at java.lang.Thread.run(Thread.java:818)    
E/AndroidRuntime(11486):     FATAL EXCEPTION: Thread-753    
E/AndroidRuntime(11486):     Process: com.appier.tracker    .android.demo, PID: 11486    
E/AndroidRuntime(11486):     java.lang.NoClassDefFoundEr    ror: <clinit> failed for class com.snowplowanalytics.snowplow.tracker.android.Util; see     exception in other thread    
E/AndroidRuntime(11486):    at com.snowplowanalytics.snowplow.tracker.android.Subject$1.run(Unknown Source)    
E/AndroidRuntime(11486):    at java.lang.Thread.run(Thread.java:818)
--------- beginning of system

但是，我们通过com.snowplowanalytics.**中的以下设置将ProGuard设置为proguard-rules.pro：

-dontwarn com.snowplowanalytics.**
-keep class com.snowplowanalytics.**{
   *;
}

为确保ProGuard获得正确的配置，我们使用baksmali [1]来验证ProGuard是否保留Util。以下是Util.smali生成的baksmali的负责人：

.class public Lcom/snowplowanalytics/snowplow/tracker/android/Util;
.super Lcom/snowplowanalytics/snowplow/tracker/core/Util;


# direct methods
.method public constructor <init>()V
    .registers 1

    invoke-direct {p0}, Lcom/snowplowanalytics/snowplow/tracker/core/Util;-><init>()V

    return-void
.end method

.method public static getAdvertisingID(Landroid/content/Context;)Ljava/lang/String;
    .registers 2

    invoke-static {p0}, Lcom/snowplowanalytics/snowplow/tracker/android/Util;->getPlayAdId(Landroid/content/Context;)Ljava/    lang/String;    

    move-result-object v0

    return-object v0
.end method

.method private static getAdvertisingInfoObject(Landroid/content/Context;)Ljava/lang/Object;
    .registers 7

....

由于Util仍然包含其所有符号名称，因此ProGuard确实会读取配置并保留com.snowplowanalytics.**。但是，Android仍无法找到该类并抛出java.lang.NoClassDefFoundError。我们不确定我们错过了什么，所以请告诉我们如何让snowplow库和ProGuard一起工作，没有任何问题，谢谢。

[0] https://github.com/snowplow/snowplow-android-tracker/releases/tag/0.2.0

[1] https://code.google.com/p/smali/

ProGuard导致snowplow-android-tracker库中的java.lang.NoClassDefFoundError

0 个答案: