解决方法一：

找到 AndroidManifest.xml -> application 标签，删除 android:name=".FlutterApplication"。

flutter工程报错：Build failed due to use of deprecated Android v1 embedding._android

增加以下 meta-data 标签。

flutter工程报错：Build failed due to use of deprecated Android v1 embedding._flutter_02

<meta-data
android:name="flutterEmbedding"
android:value="2" />

解决方法二：

找到 AndroidManifest.xml -> application 标签，将 android:name=".FlutterApplication" 替换成 android:name="${applicationName}"

flutter工程报错：Build failed due to use of deprecated Android v1 embedding._flutter_03