Adding kapt to use Room causes compile errors

Question

I added apply plugin: 'kotlin-kapt' to be able to use Rooms annotation proccessor:

compile "android.arch.persistence.room:runtime:1.0.0"
kapt "android.arch.persistence.room:compiler:1.0.0"

However when I build my project I get:

Folder C:\Users\...\app\build\generated\source\kaptKotlin\debug


Folder C:\Users\...\app\build\generated\source\kaptKotlin\release


3rd-party Gradle plug-ins may be the cause

If I get rid of kapt and simply use annotationProcessor instead. The app crashes saying:

java.lang.RuntimeException: cannot find implementation for com.example..data.database.Appdatabase. Appdatabase_Impl does not exist

Any ideas on how to use Room

You probably have other things that use annotationProcessor instead of kapt? — EpicPandaForce, Mar 29 '18 at 18:35
@EpicPandaForce No, I have the common android support libraries but the only annotation library I have is room — Derek, Mar 29 '18 at 18:38
If you are using kotlin version 1.2.31 probably you will get such error. use kotlin version 1.2.30 for now. — Nabin Khatiwada, Mar 30 '18 at 10:18
Can you check this for first issue .... https://stackoverflow.com/questions/49518223/3rd-party-gradle-plug-ins-may-be-the-cause . Keep kapt as that will be the correct way . — Ravindra Shekhawat, Apr 03 '18 at 09:56
Still happening with Kotlin 1.2.51 and Andtroid Studio 3.1.3 ... — xarlymg89, Jul 16 '18 at 14:46
Still happening with Kotlin 1.2.51 and Andtroid Studio 3.1.4 — Wood, Sep 14 '18 at 09:05

score 1 · Answer 1 · edited Jul 21 '18 at 15:11

1

I was facing similar issue.

Go to:

Run -> Edit Configurations -> General

At the bottom, there is window named

Before launch: Gradle-Aware, Active tool window

Remove

Instant App Provision

and keep Gradle-aware Make

edited Jul 21 '18 at 15:11

Nemo

2,441
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answered Jul 19 '18 at 07:48

Amrita

455
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score 0 · Answer 2 · answered Sep 28 '18 at 10:38

I delete two folder app\build\generated\source\kaptKotlin\debug and app\build\generated\source\kaptKotlin\release ("debug" and "release") and add in gradle:

kapt {
        mapDiagnosticLocations = true
    }

then the project is sync without problem.

Adding kapt to use Room causes compile errors

2 Answers2