Epoxy: Unable to use with DataBindings and AndroidX when not using 3.0.0-rc1

Created on 26 Oct 2018  路  18Comments  路  Source: airbnb/epoxy

Hi I tried it with a simple DataBinding as a Model but building gives me:

e: error: Epoxy Processor Exception: Caused by TypeCastException: null cannot be cast to non-null type javax.lang.model.element.TypeElement Stacktrace: com.airbnb.epoxy.DataBindingModelInfo.<init>(DataBindingModelInfo.kt:27) com.airbnb.epoxy.DataBindingModelInfo.<init>(DataBindingModelInfo.kt:16) com.airbnb.epoxy.DataBindingProcessor.process(DataBindingProcessor.kt:33) com.airbnb.epoxy.EpoxyProcessor.processRound(EpoxyProcessor.java:189) com.airbnb.epoxy.EpoxyProcessor.process(EpoxyProcessor.java:165)

I do use Kotlin and AndroidX.

My Model XML looks like this:

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="displayName"
            type="String" />
        <variable
            name="lastMessage"
            type="String" />
    </data>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/selectableItemBackground">

        <de.hdodenhof.circleimageview.CircleImageView
            android:id="@+id/roomImage"
            android:layout_width="@dimen/dialog_avatar_width"
            android:layout_height="@dimen/dialog_avatar_height"
            android:layout_margin="16dp"/>

        <TextView
            android:id="@+id/displayNameID"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="16dp"
            android:layout_marginRight="16dp"
            android:layout_marginTop="19dp"
            android:layout_toEndOf="@id/roomImage"
            android:layout_toLeftOf="@id/dialogDate"
            android:layout_toRightOf="@id/roomImage"
            android:layout_toStartOf="@id/dialogDate"
            android:ellipsize="end"
            android:fontFamily="@string/font_fontFamily_medium"
            android:includeFontPadding="false"
            android:maxLines="1"
            android:text="@{displayName}"/>

        <TextView
            android:id="@id/dialogDate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_marginEnd="16dp"
            android:layout_marginRight="16dp"
            android:layout_marginTop="16dp"
            android:ellipsize="end"
            android:maxLines="1"/>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/displayNameID"
            android:layout_marginEnd="16dp"
            android:layout_marginRight="16dp"
            android:layout_marginTop="7dp"
            android:layout_toEndOf="@id/roomImage"
            android:layout_toLeftOf="@+id/dialogUnreadBubble"
            android:layout_toRightOf="@id/roomImage"
            android:layout_toStartOf="@+id/dialogUnreadBubble">

            <de.hdodenhof.circleimageview.CircleImageView
                android:id="@id/dialogLastMessageUserAvatar"
                android:layout_width="24dp"
                android:layout_height="24dp"
                android:layout_marginEnd="7dp"
                android:layout_marginRight="7dp"/>


            <TextView
                android:id="@+id/lastMessageID"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_toEndOf="@id/dialogLastMessageUserAvatar"
                android:layout_toRightOf="@id/dialogLastMessageUserAvatar"
                android:ellipsize="end"
                android:gravity="top"
                android:maxLines="1"
                android:text="@{lastMessage}"/>

        </RelativeLayout>

        <TextView
            android:id="@id/dialogUnreadBubble"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_below="@id/dialogDate"
            android:layout_marginEnd="24dp"
            android:layout_marginRight="24dp"
            android:layout_marginTop="10dp"
            android:background="@drawable/bubble_circle"
            android:ellipsize="end"
            android:fontFamily="@string/font_fontFamily_medium"
            android:gravity="center"
            android:lines="1"/>

        <FrameLayout
            android:id="@id/dialogDividerContainer"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_marginTop="16dp">

            <View
                android:id="@id/dialogDivider"
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:background="@color/dialog_divider"/>

        </FrameLayout>

    </RelativeLayout>
</layout>

My package-info.java looks like this:

@EpoxyDataBindingLayouts({R.layout.room_element})
package blog.nordgedanken.simplematrix.roomView.recyclerView;

import com.airbnb.epoxy.EpoxyDataBindingLayouts;
import blog.nordgedanken.simplematrix.R;

I do use 3.0.0-rc1 with kapt as I use Kotlin

picture MTRNord

Most helpful comment

@markusressel in the end it was a combination of having clashing id namings and variables together with inconsistent epoxy versions. One of them was using an older version :/

picture MTRNord on 27 Oct 2018
👍2

All 18 comments

PS my App consists of a mobile and a wear module

MTRNord picture MTRNord on 27 Oct 2018

After fixing that variable name and id are the same I got this now:

e: error: Epoxy Processor Exception: Error generating model classes Caused by NullPointerException: null Stacktrace: com.airbnb.epoxy.Utils.areParamsTheSame(Utils.java:300) com.airbnb.epoxy.Utils.getMethodOnClass(Utils.java:270) com.airbnb.epoxy.Utils.implementsMethod(Utils.java:244) com.airbnb.epoxy.GeneratedModelWriter.generateDataBindingMethodsIfNeeded(GeneratedModelWriter.kt:1131) com.airbnb.epoxy.GeneratedModelWriter.generateClassForModel(GeneratedModelWriter.kt:164) com.airbnb.epoxy.GeneratedModelWriter.generateClassForModel$default(GeneratedModelWriter.kt:134) com.airbnb.epoxy.DataBindingProcessor.resolveDataBindingClassesAndWriteJava(DataBindingProcessor.kt:104) com.airbnb.epoxy.DataBindingProcessor.process(DataBindingProcessor.kt:81) com.airbnb.epoxy.EpoxyProcessor.processRound(EpoxyProcessor.java:189) com.airbnb.epoxy.EpoxyProcessor.process(EpoxyProcessor.java:165)

MTRNord picture MTRNord on 27 Oct 2018

Hm seems to build now after a full rebuild

MTRNord picture MTRNord on 27 Oct 2018

Did you follow the instructions here:
https://github.com/airbnb/epoxy/wiki/Data-Binding-Support

and added 

implementation "com.airbnb.android:epoxy-databinding:$epoxyVersion"

to your build.gradle?

EDIT: Ah sorry, had an old version of this thread opened in browser and didn't know you already closed it.

markusressel picture markusressel on 27 Oct 2018
👍1

@markusressel in the end it was a combination of having clashing id namings and variables together with inconsistent epoxy versions. One of them was using an older version :/

MTRNord picture MTRNord on 27 Oct 2018
👍2

I'm having the same problem. I'm trying to use 2.19.0 with Kotlin + AndroidX + DataBinding and get this error:

e: error: Epoxy Processor Exception: Error generating model classes Caused by NullPointerException: null       
Stacktrace:      com.airbnb.epoxy.Utils.areParamsTheSame(Utils.java:296)       com.airbnb.epoxy.Utils.getMethodOnClass(Utils.java:266)       com.airbnb.epoxy.Utils.implementsMethod(Utils.java:240)       com.airbnb.epoxy.GeneratedModelWriter.generateDataBindingMethodsIfNeeded(GeneratedModelWriter.kt:970)       com.airbnb.epoxy.GeneratedModelWriter.generateClassForModel(GeneratedModelWriter.kt:145)       com.airbnb.epoxy.GeneratedModelWriter.generateClassForModel$default(GeneratedModelWriter.kt:116)       com.airbnb.epoxy.DataBindingProcessor.resolveDataBindingClassesAndWriteJava(DataBindingProcessor.kt:104)       com.airbnb.epoxy.DataBindingProcessor.process(DataBindingProcessor.kt:81)       com.airbnb.epoxy.EpoxyProcessor.processRound(EpoxyProcessor.java:189)       com.airbnb.epoxy.EpoxyProcessor.process(EpoxyProcessor.java:165)

I added everything correctly to app.build:

implementation 'com.airbnb.android:epoxy:2.19.0'
implementation "com.airbnb.android:epoxy-databinding:2.19.0"
implementation 'com.airbnb.android:epoxy-paging:2.19.0'
kapt 'com.airbnb.android:epoxy-processor:2.19.0'

I know of 3.0 but I need the new PagedListEpoxyController.

tsuharesu picture tsuharesu on 2 Nov 2018

I don't thing versions lower than 3.0 are compatible with androidx, are they?

markusressel picture markusressel on 2 Nov 2018

Except for some parts, they are. I can use PagedListEpoxyController if I use ViewHolders, but not with DataBinding.

tsuharesu picture tsuharesu on 2 Nov 2018

@tsuharesu I currently use PagedListEpoxyController + AndroidX + epoxy + DataBindings. Important for me was that I need all versions to be the latest 3.X version of epoxy. Also make sure that your item IDs dont clash with the databinding variable IDs. Because they seem to break the generating part

MTRNord picture MTRNord on 2 Nov 2018

@MTRNord PagedListEpoxyController is part of 2.18+, not 3.0.
3.0 still uses PagingEpoxyController (and I'm having a problem with it).

https://github.com/airbnb/epoxy/blob/master/CHANGELOG.md#2180-sep-26-2018

tsuharesu picture tsuharesu on 2 Nov 2018

@tsuharesu oh I just realised that. PagedList vs Paging :/ I indeed use Paging

MTRNord picture MTRNord on 2 Nov 2018

@tsuharesu actually it seems like androidX still is only a PR and not has landed in general and looking at the tag order 3.0.0-rc1 is much older than 2.19 :/

MTRNord picture MTRNord on 4 Nov 2018

But indeed 2.19 fails. I guess someone else can resolve the confusing if 3.0.0-rc1 is actually newer or not and what might cause the issue if 2.19 is indeed newer as github tagging shows

MTRNord picture MTRNord on 4 Nov 2018

2.19+ is stuck generating with this error:

e: error: Epoxy Processor Exception: Error generating model classes Caused by NullPointerException: null Stacktrace: com.airbnb.epoxy.Utils.areParamsTheSame(Utils.java:300) com.airbnb.epoxy.Utils.getMethodOnClass(Utils.java:270) com.airbnb.epoxy.Utils.implementsMethod(Utils.java:244) com.airbnb.epoxy.GeneratedModelWriter.generateDataBindingMethodsIfNeeded(GeneratedModelWriter.kt:1131) com.airbnb.epoxy.GeneratedModelWriter.generateClassForModel(GeneratedModelWriter.kt:164) com.airbnb.epoxy.GeneratedModelWriter.generateClassForModel$default(GeneratedModelWriter.kt:134) com.airbnb.epoxy.DataBindingProcessor.resolveDataBindingClassesAndWriteJava(DataBindingProcessor.kt:104) com.airbnb.epoxy.DataBindingProcessor.process(DataBindingProcessor.kt:81) com.airbnb.epoxy.EpoxyProcessor.processRound(EpoxyProcessor.java:189) com.airbnb.epoxy.EpoxyProcessor.process(EpoxyProcessor.java:165)

MTRNord picture MTRNord on 4 Nov 2018

3.0 is older https://github.com/airbnb/epoxy/releases.
We need to wait for all 2.1x changes to be merged to 3.0.

Right now my workaround is to not use Databinding.

tsuharesu picture tsuharesu on 5 Nov 2018

I guess I will wait in that case. As I just rebuilt my App with databindings. Means I dont want to rework it again :)

MTRNord picture MTRNord on 5 Nov 2018

@tsuharesu It seems like you can use the androidX PR changes using the latest build on https://jitpack.io/#jeffreydelooff/epoxy It includes the new features

MTRNord picture MTRNord on 10 Nov 2018

3.0.0 is finally out with androidx and all latest epoxy updates

elihart picture elihart on 13 Nov 2018
🎉1
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