Cannot find symbol CrimeDao

Android Programming (4th Edition) 11. Databases and the Room Library
1

I’m getting an error when compiling the Criminal Intent app after adding the database (p223 in the book). I’m pretty sure this is caused by me mistyping something, but I can’t find it. The error I get is below: can anyone offer any advice about how to resolve this? Note that the error is detected in the autogenerated java file, not the kotlin source.

/Users/kae/AndroidStudioProjects/CriminalIntent/app/build/tmp/kapt3/stubs/debug/com/bignerdranch/android/criminalintent/database/CrimeDatabase.java:11: error: cannot find symbol
public abstract CrimeDao crimeDao();
^
symbol: class CrimeDao
location: class CrimeDatabase/Users/kae/AndroidStudioProjects/CriminalIntent/app/build/tmp/kapt3/stubs/debug/com/bignerdranch/android/criminalintent/CrimeRepository.java:8: error: cannot find symbol
private final CrimeDao crimeDao = null;
^
symbol: class CrimeDao
location: class CrimeRepository/Users/kae/AndroidStudioProjects/CriminalIntent/app/build/tmp/kapt3/stubs/debug/com/bignerdranch/android/criminalintent/database/CrimeDatabase.java:8: error: [RoomProcessor:MiscError] androidx.room.RoomProcessor was unable to process this class because not all of its dependencies could be resolved. Check for compilation errors or a circular dependency with generated code.

2

I’m really struggling with this. I’ve checked the code multiple times and I can’t see any error. Can anyone suggest where to look to resolve this?

The error highlighted is in the generated code, not the code I have entered:

ScreenShot-2021-02-07-10-28-11
ScreenShot-2021-02-07-10-28-111194×550 125 KB

Thank you.

3

I’ve fixed this problem, but uncovered another.

The issue was caused because I had “import CrimeDao” at the top of CrimeDatabase.kt. Android Studio prompts to add that, but (with hindsight) it’s clearly wrong.

Now the problem I have is:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution
   > java.lang.reflect.InvocationTargetException (no error message)

More detail:

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:kaptDebugKotlin'.
[...]

Caused by: org.jetbrains.kotlin.kapt3.base.util.KaptBaseError: Exception while annotation processing
	at [...]

Caused by: kotlin.KotlinNullPointerException
	at [...]

Can anyone shed light on this?

4

Have you discovered the cause of this issue? I am experiencing the same errors.

5

hi, could you solve the new problem?