D-Day 앱 만들기에서 에러가 나옵니다ㅠㅠ

Question

하나는 "NullPointerException: Cannot invoke "String.length()" because "" is null" 이런 에러인거 같은데....대체 어디서 잘못된걸까요. 에러가 여러개 인건가요? FAILURE: Build completed with 2 failures. 1: Task failed with an exception. ----------- * What went wrong: Execution failed for task ':app:checkDebugAarMetadata'. > A failure occurred while executing com.android.build.gradle.internal.tasks.CheckAarMetadataWorkAction > 5 issues were found when checking AAR metadata: * Try: > Run with --info or --debug option to get more log output. > Run with --scan to get full insights. * Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:checkDebugAarMetadata'. Caused by: org.gradle.workers.internal.DefaultWorkerExecutor$WorkExecutionException: A failure occurred while executing com.android.build.gradle.internal.tasks.CheckAarMetadataWorkAction Caused by: java.lang.RuntimeException: 5 issues were found when checking AAR metadata: 1. Dependency 'androidx.appcompat:appcompat-resources:1.7.0' requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs. :app is currently compiled against android-33. Also, the maximum recommended compile SDK version for Android Gradle plugin 8.0.0 is 33. Recommended action: Update this project's version of the Android Gradle plugin to one that supports 34, then update this project to use compileSdk of at least 34. Note that updating a library or application's compileSdk (which allows newer APIs to be used) can be done separately from updating targetSdk (which opts the app in to new runtime behavior) and minSdk (which determines which devices the app can be installed on). 2. Dependency 'androidx.appcompat:appcompat:1.7.0' requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs. :app is currently compiled against android-33. Also, the maximum recommended compile SDK version for Android Gradle plugin 8.0.0 is 33. Recommended action: Update this project's version of the Android Gradle plugin to one that supports 34, then update this project to use compileSdk of at least 34. Note that updating a library or application's compileSdk (which allows newer APIs to be used) can be done separately from updating targetSdk (which opts the app in to new runtime behavior) and minSdk (which determines which devices the app can be installed on). 3. Dependency 'androidx.core:core-ktx:1.13.0' requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs. :app is currently compiled against android-33. Also, the maximum recommended compile SDK version for Android Gradle plugin 8.0.0 is 33. Recommended action: Update this project's version of the Android Gradle plugin to one that supports 34, then update this project to use compileSdk of at least 34. Note that updating a library or application's compileSdk (which allows newer APIs to be used) can be done separately from updating targetSdk (which opts the app in to new runtime behavior) and minSdk (which determines which devices the app can be installed on). 4. Dependency 'androidx.core:core:1.13.0' requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs. :app is currently compiled against android-33. Also, the maximum recommended compile SDK version for Android Gradle plugin 8.0.0 is 33. Recommended action: Update this project's version of the Android Gradle plugin to one that supports 34, then update this project to use compileSdk of at least 34. Note that updating a library or application's compileSdk (which allows newer APIs to be used) can be done separately from updating targetSdk (which opts the app in to new runtime behavior) and minSdk (which determines which devices the app can be installed on). 5. Dependency 'androidx.annotation:annotation-experimental:1.4.0' requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs. :app is currently compiled against android-33. Also, the maximum recommended compile SDK version for Android Gradle plugin 8.0.0 is 33. Recommended action: Update this project's version of the Android Gradle plugin to one that supports 34, then update this project to use compileSdk of at least 34. Note that updating a library or application's compileSdk (which allows newer APIs to be used) can be done separately from updating targetSdk (which opts the app in to new runtime behavior) and minSdk (which determines which devices the app can be installed on). ============================================================================== 2: Task failed with an exception. ----------- * What went wrong: Execution failed for task ':app:mergeExtDexDebug'. > Could not resolve all files for configuration ':app:debugRuntimeClasspath'. > Failed to transform appcompat-resources-1.7.0.aar (androidx.appcompat:appcompat-resources:1.7.0) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=24, org.gradle.category=library, org.gradle.dependency.bundling=external, org.gradle.libraryelements=aar, org.gradle.status=release, org.gradle.usage=java-runtime}. > Execution failed for DexingNoClasspathTransform: C:\Users\abc14\.gradle\caches ransforms-3\c494794d48d9429ce3837ff3d9162578 ransformed\appcompat-resources-1.7.0-runtime.jar. > Error while dexing. > Failed to transform appcompat-1.7.0.aar (androidx.appcompat:appcompat:1.7.0) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=24, org.gradle.category=library, org.gradle.dependency.bundling=external, org.gradle.libraryelements=aar, org.gradle.status=release, org.gradle.usage=java-runtime}. > Execution failed for DexingNoClasspathTransform: C:\Users\abc14\.gradle\caches ransforms-3\d251d80cfc588f74172158875c7b2196 ransformed\appcompat-1.7.0-runtime.jar. > Error while dexing. * Try: > Run with --info or --debug option to get more log output. > Run with --scan to get full insights. * Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:mergeExtDexDebug'. Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null Caused by: java.util.concurrent.ExecutionException: com.android.tools.r8.utils.P0: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null Caused by: [CIRCULAR REFERENCE: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null] Cause 2: org.gradle.api.internal.artifacts.transform.TransformException: Failed to transform appcompat-1.7.0.aar (androidx.appcompat:appcompat:1.7.0) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=24, org.gradle.category=library, org.gradle.dependency.bundling=external, org.gradle.libraryelements=aar, org.gradle.status=release, org.gradle.usage=java-runtime}. Caused by: org.gradle.api.internal.artifacts.transform.TransformException: Execution failed for DexingNoClasspathTransform: C:\Users\abc14\.gradle\caches ransforms-3\d251d80cfc588f74172158875c7b2196 ransformed\appcompat-1.7.0-runtime.jar. Caused by: com.android.builder.dexing.DexArchiveBuilderException: Error while dexing. at com.android.builder.dexing.D8DexArchiveBuilder.getExceptionToRethrow(D8DexArchiveBuilder.java:189) Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: C:\Users\abc14\.gradle\caches ransforms-3\d251d80cfc588f74172158875c7b2196 ransformed\appcompat-1.7.0-runtime.jar:androidx/appcompat/app/ActionBarDrawerToggle$1.class Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null Suppressed: java.lang.RuntimeException: java.util.concurrent.ExecutionException: com.android.tools.r8.utils.P0: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null Caused by: java.util.concurrent.ExecutionException: com.android.tools.r8.utils.P0: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null Caused by: com.android.tools.r8.utils.P0: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null Caused by: [CIRCULAR REFERENCE: java.lang.NullPointerException: Cannot invoke "String.length()" because "" is null]

개복치개발자 · Answer

뭔가 값을 하나 누락하신거같은데 강의자료에 소스코드 다운로드 받으셔서 비교해보셨나요? 만약 동일하게 했는데도 오류가 나오면 전체 코드를 공유해주세요.