flutter - android minSdkVersion 不斷出錯

Question

感謝您閱讀我的問題。

希望你今天過得好！

所以我的問題是，當我使用 android 仿真器運行我的 flutter 項目時，會顯示以下錯誤消息。

The plugin google_mobile_ads requires a higher Android SDK version.
Fix this issue by adding the following to the file /Users/ahnjunhyun/FlutterProjects/dubu_timer/android/app/build.gradle:
android {
  defaultConfig {
    minSdkVersion 19
  }
}
Note that your app won't be available to users running Android SDKs below 19.
Alternatively, try to find a version of this plugin that supports these lower versions of the Android SDK.

所以我將minSdkVersion更改為minSdkVersion 19 。 然后我得到了另一個錯誤，如下所示！

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/ahnjunhyun/FlutterProjects/dubu_timer/android/app/build.gradle' line: 47

* What went wrong:
A problem occurred evaluating project ':app'.
> Cannot get property '19' on null object

有沒有人遇到同樣的問題或知道如何解決？

我需要你的幫助

Answer 1

您必須將 minSdkVersion 19 更新到 21 才能使用 google_mobile_ads。

    defaultConfig {
      applicationId "io.flutter.plugins.googlemobileadsexample"
      minSdkVersion 21
      targetSdkVersion 31
      versionCode flutterVersionCode.toInteger()
      versionName flutterVersionName
      testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

參考： https://github.com/googleads/googleads-mobile-flutter/blob/master/packages/google_mobile_ads/example/android/app/build.gradle

Answer 2

也許您輸入了“19”作為字符串而不是 integer，所以請看一下。