https://developers.google.com/cardboard/develop/unity/quickstart
Unity ver.2020.3.38
Mac ver.12.6
Android Sdk ver.30
Google Cardboard のデモをAndroid 用にビルドしたら以下のエラー
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade > Android resource linking failed /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:3:5-94: AAPT: error: resource android:color/system_neutral1_1000 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:4:5-94: AAPT: error: resource android:color/system_neutral1_900 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:5:5-93: AAPT: error: resource android:color/system_neutral1_0 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:6:5-94: AAPT: error: resource android:color/system_neutral1_800 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:7:5-94: AAPT: error: resource android:color/system_neutral1_700 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:8:5-94: AAPT: error: resource android:color/system_neutral1_600 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:9:5-94: AAPT: error: resource android:color/system_neutral1_500 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:10:5-94: AAPT: error: resource android:color/system_neutral1_400 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:11:5-94: AAPT: error: resource android:color/system_neutral1_300 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:12:5-94: AAPT: error: resource android:color/system_neutral1_200 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:13:5-94: AAPT: error: resource android:color/system_neutral1_100 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:14:5-93: AAPT: error: resource android:color/system_neutral1_50 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:15:5-93: AAPT: error: resource android:color/system_neutral1_10 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:16:5-102: AAPT: error: resource android:color/system_neutral2_1000 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:17:5-102: AAPT: error: resource android:color/system_neutral2_900 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:18:5-101: AAPT: error: resource android:color/system_neutral2_0 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:19:5-102: AAPT: error: resource android:color/system_neutral2_800 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:20:5-102: AAPT: error: resource android:color/system_neutral2_700 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:21:5-102: AAPT: error: resource android:color/system_neutral2_600 not found. /Users/falco/.gradle/caches/transforms-2/files-2.1/a0ebba694f8e6a95bc427eaef4894530/material-1.6.1/res/values-v31/values-v31.xml:22:5-102: AAPT: error: resource android:color/system_neutral2_500 not found.
リソースが見つからない…
対応としては、ライブラリーをダウングレード
// implementation 'androidx.appcompat:appcompat:1.4.2' implementation 'com.google.android.gms:play-services-vision:20.1.3' // implementation 'com.google.android.material:material:1.6.1' implementation 'com.google.protobuf:protobuf-javalite:3.19.4' implementation 'androidx.appcompat:appcompat:1.3.0' implementation 'com.google.android.material:material:1.4.0'
これでビルド出来た。