dart - 在项目中包含 image_picker 时出错 (Flutter)

Question

为什么这个错误在我执行我的项目时不断出现？一旦我将 image_picker 放入我的 pubspec 中，它就会发生。

FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:processDebugResources'. Android resource linking failed Output: /Users/s/Desktop/Flutter/a/build/app/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:331: error: resource android:attr/fontVariationSettings not found. /Users/s/Desktop/Flutter/a/build/app/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:331: error: resource android:attr/ttcIndex not found. error: failed linking references. Command: /Users/s/.gradle/caches/transforms-1/files-1.1/aapt2-3.2.1-4818971-osx.jar/6d65e55edb223325e7c5119d99552582/aapt2-3.2.1-4818971-osx/aapt2 link -I\ /Users/s/Library/Android/sdk/platforms/android-27/android.jar\ --manifest\ /Users/s/Desktop/Flutter/a/build/app/intermediates/merged_manifests/debug/processDebugManifest/merged/AndroidManifest.xml\ -o\ /Users/s/Desktop/Flutter/a/build/app/intermediates/processed_res/debug/processDebugResources/out/resources-debug.ap_\ -R\ @/Users/s/Desktop/Flutter/a/build/app/intermediates/incremental/processDebugResources/resources-list-for-resources-debug.ap_.txt\ --auto-add-overlay\ --java\ /Users/s/Desktop/Flutter/a/build/app/generated/not_namespaced_r_class_sources/debug/processDebugResources/r\ --custom-package\ com.example.a\ -0\ apk\ --output-text-symbols\ /Users/s/Desktop/Flutter/a/build/app/intermediates/symbols/debug/R.txt\ --no-version-vectors Daemon: AAPT2 aapt2-3.2.1-4818971-osx Daemon #0 Output: /Users/s/.gradle/caches/transforms-1/files-1.1/design-27.1.1.aar/fa938137e4d19d1dd06a6895b6e14886/res/values/values.xml:96:5-202: AAPT: error: resource android:attr/fontVariationSettings not found.

/Users/s/.gradle/caches/transforms-1/files-1.1/design-27.1.1.aar/fa938137e4d19d1dd06a6895b6e14886/res/values/values.xml:96:5-202: AAPT: error: resource android:attr/ttcIndex not found. error: failed linking references. Command: /Users/s/.gradle/caches/transforms-1/files-1.1/aapt2-3.2.1-4818971-osx.jar/6d65e55edb223325e7c5119d99552582/aapt2-3.2.1-4818971-osx/aapt2 link -I\ /Users/s/Library/Android/sdk/platforms/android-27/android.jar\ --manifest\ /Users/s/Desktop/Flutter/a/build/app/intermediates/merged_manifests/debug/processDebugManifest/merged/AndroidManifest.xml\ -o\ /Users/s/Desktop/Flutter/a/build/app/intermediates/processed_res/debug/processDebugResources/out/resources-debug.ap_\ -R\ @/Users/s/Desktop/Flutter/a/build/app/intermediates/incremental/processDebugResources/resources-list-for-resources-debug.ap_.txt\ --auto-add-overlay\ --java\ /Users/s/Desktop/Flutter/a/build/app/generated/not_namespaced_r_class_sources/debug/processDebugResources/r\ --custom-package\ com.example.a\ -0\ apk\ --output-text-symbols\ /Users/s/Desktop/Flutter/a/build/app/intermediates/symbols/debug/R.txt\ --no-version-vectors Daemon: AAPT2 aapt2-3.2.1-4818971-osx Daemon #0

Answer 1

将 compileSdkVersion 更改为 28(在 android/app/build.gradle 下)

compileSdkVersion 28

然后运行命令

flutter clean

然后再次运行项目。