Flutter项目中“flutter.minSdkVersion”的值在哪里初始化？

Question

我创建了一个新的 Flutter 项目，这就是 minSdkVersion 在app/build.gradle文件中的样子：

defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "com.example.projectname"
    minSdkVersion flutter.minSdkVersion
    targetSdkVersion flutter.targetSdkVersion
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

flutter.minSdkVersion的值在哪里设置？

请注意，以前，该配置值如下所示：

defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "com.example.projectname"
    minSdkVersion 19 //*** This is the part that needs to be changed, previously was 16
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

此外，这是android/local.properties文件的内容：

sdk.dir=/Users/usernaem/Library/Android/sdk
flutter.sdk=/Users/username/flutter
flutter.buildMode=release
flutter.versionName=1.0.0
flutter.versionCode=1

可以看到，这里并没有设置flutter.minSdkVersion的值，但是工程可以编译构建成功。

flutter.minSdkVersion和flutter.targetSdkVersion变量在哪里初始化？

PS相关问题： https://github.com/flutter/flutter/issues/95533

Answer 1

Go 到您的 flutter 提取文件夹中的此文件：

颤振/包/flutter_tools/gradle/flutter.gradle

在那里您可以找到所有 static 变量。

Answer 2

您应该按照以下说明从 local.properties 进行更改：

1. 首先 go 到 android-> local.properties

2. 并从这里更改local.properties

添加这一行

flutter.minSdkVersion=19
flutter.targetSdkVersion=28
flutter.compileSdkVersion=28

注意：您找不到自己创建的local.properties

Answer 3

将变量放入您的android/local.propertie文件中：

例子：

flutter.minSdkVersion=21

并更改android/app/build.gradle

localProperties.getProperties('flutter.minSdkVersion') // flutter.minSdkVersion 

Answer 4

只需将flutter.minSdkVersion替换为您需要的值，例如旧样式的19

defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "com.example.projectname"
    minSdkVersion 19
    targetSdkVersion flutter.targetSdkVersion
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
}

Answer 5

按照路径/android/app/build.gradle

 defaultConfig {
    // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
    applicationId "com.sample.com"
    // You can update the following values to match your application needs.
    // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
    minSdkVersion 23
    targetSdkVersion 33
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
    multiDexEnabled true

}`