当minifyEnabled为真时，Parcelable / Parceler出错

Question

设置minifyEnabled true时，将得到以下错误

无法为com.codeworks.myapp.FirestoreModel$$Parcelable找到生成的Parcelable类，请验证您的类配置是否正确，以及Parceler是否生成了Parcelable类

。

我在proguard-rules.pro中放置了如下代码，如parceler.org网站所示

# Parceler configuration
-keep interface org.parceler.Parcel
-keep @org.parceler.Parcel class * { *; }
-keep class **$$Parcelable { *; }
-keep class org.parceler.Parceler$$Parcels

..。并在FirestoreModel和片段的类中添加了@Keep注释：

@Parcel
@Keep
class FirestoreModel{
...
}

@Keep
class MyFragment: Fragment() {
...
}

然后添加了一些专业警卫规则，或者我从stackoverflow.com的示例中了解到的规则(因为我无法理解官方文档中的规则)：

-keepnames class com.codeworks.myapp.MyFragment { *; }
-keepnames class com.codeworks.myappFirestoreModel { *; }

我仍然收到以下错误：

2020-04-21 08:07:38.554 28188-28188/com.codeworks.myapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.codeworks.myapp, PID: 28188
    h.a.d: Unable to find generated Parcelable class for com.codeworks.myappFirestoreModel, verify that your class is configured properly and that the Parcelable class com.codeworks.myappFirestoreModel$$Parcelable is generated by Parceler.
        at h.a.e$b.a(:154)
        at h.a.e.a(:73)
        at h.a.e.a(:57)
        at com.codeworks.myapp.MyFragment$onViewCreated$1.a(:103)
        at com.codeworks.myapp.MyFragment$onViewCreated$1.a(:68)
        at com.firebase.ui.firestore.FirestoreRecyclerAdapter.b(:158)
        at androidx.recyclerview.widget.RecyclerView$g.a(:7065)
        at androidx.recyclerview.widget.RecyclerView$g.a(:7107)
        at androidx.recyclerview.widget.RecyclerView$v.a(:6012)
        at androidx.recyclerview.widget.RecyclerView$v.a(:6279)
        at androidx.recyclerview.widget.RecyclerView$v.b(:6118)
        at androidx.recyclerview.widget.RecyclerView$v.d(:6114)
        at androidx.recyclerview.widget.LinearLayoutManager$c.a(:2303)
        at androidx.recyclerview.widget.LinearLayoutManager.a(:1627)
        at androidx.recyclerview.widget.LinearLayoutManager.a(:1587)
        at androidx.recyclerview.widget.LinearLayoutManager.e(:665)
        at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(:4134)
        at androidx.recyclerview.widget.RecyclerView.dispatchLayout(:3851)
        at androidx.recyclerview.widget.RecyclerView.consumePendingUpdateOperations(:1897)
        at androidx.recyclerview.widget.RecyclerView$a.run(:414)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
        at android.view.Choreographer.doCallbacks(Choreographer.java:796)
        at android.view.Choreographer.doFrame(Choreographer.java:727)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
        at android.os.Handler.handleCallback(Handler.java:907)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:216)
        at android.app.ActivityThread.main(ActivityThread.java:7464)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:549)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:955)

显然，onViewCreated函数在MyFragment上的变量名正在被重命名，尽管有支持保护规则。

这个错误似乎指向了这一行：

    // Here... at com.codeworks.myapp.MyFragment$onViewCreated$1.a(:68)
    adapter = object : FirestoreRecyclerAdapter<DpMemoModel, DpViewHolder>(options) {

        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): FirestoreViewHolder{

            val view : View = LayoutInflater.from(parent.context).inflate(R.layout.firestore_cardview, parent, false)

            return FirestoreViewHolder(view)
        }
        override fun onBindViewHolder(
            holder: FirestoreViewHolder,
            position: Int,
            model: FirestoreModel
        ) {
...
            // ...and Here: **at com.codeworks.myapp.MyFragment$onViewCreated$1.a(:103)**
            val wrapped : Parcelable = Parcels.wrap(model)

            holder.cardView.setOnClickListener {

                val intent= Intent(activity, FirestoreInfoActivity::class.java)
                intent.putExtra("parcel", wrapped)
                startActivity(intent)
            }

P.S.：我正在使用FirestoreRecyclerAdapter，我认为这是最好的方法，因为我正在处理Cloud和Firebase存储数据。

Answer 1

我不知道哪里出了问题，也不知道错过了什么。我现在改用@Parcelize。代码要长一点，但至少可以工作。此外，没有必要使用：

# Parceler configuration
-keep interface org.parceler.Parcel
-keep @org.parceler.Parcel class * { *; }
-keep class **$$Parcelable { *; }
-keep class org.parceler.Parceler$$Parcels

proguard-rules.pro. ...in我所需要的只是在数据类中保留@注释。我花了一天半的时间研究，尝试和错误，但是，嗯，是的，拉维。