grandstaish/paperparcel

Android | NoClassDefFoundError after second compile

Closed this issue · 3 comments

jachenry commented

I've been having issues with missing PaperParcel classes the second time I compile my project. I'm not certain if PaperParcel is the culprit but only experience the issues with PaperParcel's generated classes.

Build Environment

  • PaperParcel: 2.0.0
  • Gradle: 3.3
  • Kotlin: 1.1.1
  • Kapt: 3
  • Kotlin IntelliJ plugin: 1.1.1-release-Studio2.3-1
  • Android Studio: 2.3

Project Setup

The project in question has two android libraries (api and app), both utilizing PaperParcel. Below is an example for one of the models in the api module:

package com.project.api.models

import android.os.Parcel
import android.os.Parcelable
import paperparcel.PaperParcel
import java.util.*

@PaperParcel
data class User(val id: Int,
                val email: String,
                val firstName: String,
                val lastName: String,
                val initials: String,
                val phone: String? = null,
                val dob: String? = null,
                val profilePictureUrl: String? = null) : Parcelable {

  companion object {
    @JvmField val CREATOR = PaperParcelUser.CREATOR
  }

  override fun describeContents() = 0

  override fun writeToParcel(dest: Parcel, flags: Int) {
    PaperParcelUser.writeToParcel(this, dest, flags)
  }
}

Issue

The first time I compile the project (after a clean) I see logs indicating the generated classes were properly moved into the destination folder:

[com.android.build.gradle.internal.transforms.JarMerger] addFolder(/api/build/intermediates/classes/release/com/project/api/models, com/project/api/models/): entry com/project/api/models/PaperParcelUser.class

Compiling the project again doesn't list this step and running the app eventually crashes when a generated class is referenced:

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.project.api.models.PaperParcelUser" on path: DexPathList ..."

Attempts to Resolve

grandstaish commented

Wow, so PaperParcelUser exists because the app compiled, but it's not included in the binary? Weird. This definitely doesn't sound like a bug with this library, it sounds like a build tools bug.

Are you using instant run? What about org.gradle.parallel=true?

jachenry commented

I disabled 'instant run' but kept parallel since it decreases the build times in half. I'll close this issue since I'm also pretty certain it's not a bug in the library.

A colleague came across a few other posts mentioning similar issues after upgrading to AS 2.3:

grandstaish commented

Ah ok, it sounds very much like parallel is your issue. Kapt3 doesn't work with it currently. Please vote for the issue!