我也正在尝试对此进行调查. 也许Proguard混淆了Play Core的某些类别. 尝试将所有类保持在Play核心，可打包和可序列化的状态 但是在logcat中有错误

I am trying to investigate this too. Maybe proguard obfuscates some classes of Play Core. Try to keep all classes in Play core, Parcelable and Serializable However in the logcat there are errors

-keep class * implements com.google.android.play { *; }
-keep class com.google.android.play.** { *; }
-keep interface com.google.android.play.** { *; }

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

-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    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();
}