React本机Android gradle multiDexKeepFile和multiDexKeepProguard属性-如何包含来自第三方库的类？

在最近一次Android应用程序更新后，它在第一次打开后崩溃。这是由于根据日志文件输出的

multiDex

问题造成的。在Play开发者控制台中，我得到

java.lang.NoClassDefFoundError

类似以下错误：

java.lang.NoClassDefFoundError: 
  at com.google.android.gms.internal.zzcel.zzxK (Unknown Source)
  at com.google.android.gms.internal.zzcfv.<init> (Unknown Source)
  at com.google.android.gms.internal.zzcgk.<init> (Unknown Source)
  at com.google.android.gms.internal.zzcgk.zzbj (Unknown Source)
  at com.google.android.gms.internal.zzcgb.onReceive (Unknown Source)
  at com.google.android.gms.measurement.AppMeasurementInstallReferrerReceiver.onReceive (Unknown Source)
  at android.app.ActivityThread.handleReceiver (ActivityThread.java:2725)
  at android.app.ActivityThread.-wrap14 (ActivityThread.java)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1421)
  at android.os.Handler.dispatchMessage (Handler.java:102)
  at android.os.Looper.loop (Looper.java:148)
  at android.app.ActivityThread.main (ActivityThread.java:5417)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:726)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:616)

该目录中的multidex-config.txt具有：

com/google/android/gms/measurement/AppMeasurementInstallReferrerReceiver.class

但是，当我试图通过运行

npm run build android prod

（我的npm脚本是

export ENVFILE=.env.prod&&cd android&&./gradlew assembleerelease&&cd..

）来创建发布版apk时，它最终失败，最后几行是：

  Copying resources from program directory [/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/build/intermediates/transforms/mergeJavaRes/release/folders/2/1f/main] (filtered)
  Copying resources from program directory [/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/build/intermediates/classes/release] (filtered)
Printing classes to [/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/build/outputs/mapping/release/dump.txt]...
:app:transformClassesWithMultidexlistForRelease FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesWithMultidexlistForRelease'.
> com.android.build.api.transform.TransformException: proguard.ParseException: Unexpected keyword 'com.google.android.gms.measurement.AppMeasurementInstallReferrerReceiver.class' in line 1 of file '/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/multidex-config.pro'

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 1 mins 29.609 secs

npm ERR! Darwin 16.7.0
npm ERR! argv "/usr/local/Cellar/node/7.8.0/bin/node" "/usr/local/bin/npm" "run" "build-android-prod" "--stacktrace" "--debug"
npm ERR! node v7.8.0
npm ERR! npm  v4.2.0
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! MyApp@0.0.1 build-android-prod: `export ENVFILE=.env.prod && cd android && ./gradlew assembleRelease && cd ..`
npm ERR! Exit status 1
...

困扰我的一行是：

com.android.build.api.transform.TransformException:proguard.ParseException:文件'/Users/patneedham/Desktop/dev/react native/MyApp/android/app/multidex config.pro'第1行中的意外关键字'com.google.android.gms.measurement.appmeasurementintInstallReferreReceiver.class'。

好吧，我意识到我忘记了

类

关键字，所以我添加了

-keep

和

com.google…

，构建成功，并上传到了google Play alpha频道，但同样的第一个开放应用程序崩溃发生了。为了更清楚地了解这一点，当我在Google play store屏幕上单击“打开”按钮时，一两秒钟后，我又看到一个白色屏幕，然后它关闭，默认的应用程序崩溃警报显示“不幸的是，MyApp已停止”

---

当应用程序第一次打开时，如何防止出现此

NoClassDefFoundError

？

首先，让我们验证是否确实缺少有问题的类。您可以使用Android Studio的Apk分析器来实现这一点。此外，Android Studio 3.0（目前处于测试阶段）使跟踪和修复Proguard问题变得更加容易-请务必观看。

  Copying resources from program directory [/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/build/intermediates/transforms/mergeJavaRes/release/folders/2/1f/main] (filtered)
  Copying resources from program directory [/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/build/intermediates/classes/release] (filtered)
Printing classes to [/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/build/outputs/mapping/release/dump.txt]...
:app:transformClassesWithMultidexlistForRelease FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesWithMultidexlistForRelease'.
> com.android.build.api.transform.TransformException: proguard.ParseException: Unexpected keyword 'com.google.android.gms.measurement.AppMeasurementInstallReferrerReceiver.class' in line 1 of file '/Users/patneedham/Desktop/dev/react-native/MyApp/android/app/multidex-config.pro'

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 1 mins 29.609 secs

npm ERR! Darwin 16.7.0
npm ERR! argv "/usr/local/Cellar/node/7.8.0/bin/node" "/usr/local/bin/npm" "run" "build-android-prod" "--stacktrace" "--debug"
npm ERR! node v7.8.0
npm ERR! npm  v4.2.0
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! MyApp@0.0.1 build-android-prod: `export ENVFILE=.env.prod && cd android && ./gradlew assembleRelease && cd ..`
npm ERR! Exit status 1
...