从Flutter 2.8开始，设置minSdkVersion, targetSdkVersion和compileSdkVersion略有不同。现在gradle文件在your_flutter_app/android/app/build。Gradle路径是这样的:

只需将当前值替换为您想要的版本号，如下所示:

现在运行你的颤振项目，就这样。

添加以下行到android/local。属性文件:

flutter.versionCode=1
flutter.versionName=0.0.1
flutter.flutterMinSdkVersion=24
flutter.flutterTargetSdkVersion=31

在android/app/build.gradle文件的"def versionName ="后面添加以下代码行:

def flutterMinSdkVersion = localProperties.getProperty('flutter.flutterMinSdkVersion')
if (flutterMinSdkVersion == null) {
    flutterMinSdkVersion = '16'
}

def flutterTargetSdkVersion = localProperties.getProperty('flutter.flutterTargetSdkVersion')
if (flutterMinSdkVersion == null) {
    flutterMinSdkVersion = '31'
}

最后编辑构建的部分。Gradle匹配如下:

    defaultConfig {
        applicationId "do.main.subdomain" // Use your App ID
        minSdkVersion flutterMinSdkVersion.toInteger()
        targetSdkVersion flutterTargetSdkVersion.toInteger()
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

一旦所有这些都完成了，你就可以开始了。下次你想要更新一些东西时，你只需要更改一个文件。

    **android/local.properties**
flutter.versionCode=1
flutter.minSdkVersion=21
flutter.targetSdkVersion=30
flutter.compileSdkVersion=31

  **android/app/build.gradle**
minSdkVersion localProperties.getProperty('flutter.minSdkVersion').toInteger()

targetSdkVersion localProperties.getProperty('flutter.targetSdkVersion').toInteger()
versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName

这里详细的解决MinSdk / MinSdk版本错误的方法，按照下面的步骤进行。

在android\local.properties中添加以下行

sdk.dir=
flutter.sdk=C:\\flutter
flutter.buildMode=debug
flutter.versionName=1.0.0
flutter.versionCode=1

flutter.minSdkVersion=21
flutter.targetSdkVersion=31
flutter.compileSdkVersion=31

删除现有的行，并将其粘贴到应用程序级别构建。gradle: android \ app \ build.gradle

       defaultConfig {
        applicationId "app-id"

        minSdkVersion localProperties.getProperty('flutter.minSdkVersion').toInteger()
        targetSdkVersion localProperties.getProperty('flutter.targetSdkVersion').toInteger()
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
}

我在我的flutter应用程序中设置Auth0、flutter_appauth和flutter_secure_storage时遇到了这个问题。在更改minSdkVersion版本后，我得到了这个错误

C:\Users\myusername\AndroidStudioProjects\wole\android\app\src\debug\AndroidManifest.xml Error:
    Attribute data@scheme at AndroidManifest.xml requires a placeholder substitution but no value for <appAuthRedirectScheme> is provided.
FAILURE: Build failed with an exception.

问题出在哪里: 任务“:app:processDebugManifest”执行失败。

清单合并失败:AndroidManifest.xml中的属性data@scheme需要占位符替换，但没有提供for的值。

解决方案就是这样添加manifest占位符

按照以下步骤更改minSdkVersion问题。

第一次= > YouProject_name / android / app / build.gradle

Second=> defaultconfig{//你可以在build中找到它。gradle}

defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.umair.product_details_using_crud"
        minSdkVersion 16 // here you can change minSdkVersison
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }