报错信息
Warning: there were 10 unresolved references to classes or interfaces.
You may need to add missing library jars or update their versions.
If your code works fine without the missing classes, you can suppress
the warnings with '-dontwarn' options.
(http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.
> java.io.IOException: Please correct the above warnings first.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 2m 2s
一直报device_info 的错
解决办法：
1.在 app 文件夹中创建一个名为 proguard-rules.pro 的文件（项目目录 -> android -> app -> proguard-rules.pro）
2.在文件里面写
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.** { *; }
-keep class io.flutter.util.** { *; }
-keep class io.flutter.view.** { *; }
-keep class io.flutter.** { *; }
-keep class io.flutter.plugins.** { *; }
-ignorewarnings
3.更新 build.gradle (project dir -> android -> app -> build.gradle) 将此行添加到 buildTypes 块：
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
build.gradle 中的示例片段：
defaultConfig {
applicationId "com.company.appname"
minSdkVersion 23
targetSdkVersion 30
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}
signingConfigs {
release {
keyAlias keystoreProperties['keyAlias']
keyPassword keystoreProperties['keyPassword']
storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
storePassword keystoreProperties['storePassword']
}
}
buildTypes {
release {
signingConfig signingConfigs.release
shrinkResources true
minifyEnabled true
useProguard true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
然后运行 flutter build appbundle 或 flutter build apk --split-per-abi 应该不会导致任何问题。
