一：

在命令行运行，后会生成upload-keystore-anyou.jks文件，这个文件名自己定义：
keytool -genkey -v -keystore E:/jks/uploadcar01.jks -keyalg RSA -keysize 2048 -validity 10000 -alias uploadcar01

密钥自己准备一个：mycarab

将.jks文件拷贝到android跟目录下， jks文件名和 上面的-alias后面的名字一致。

二：在文件 android/local.properties中添加：

storePassword=mycarab
keyPassword=mycarab
keyAlias=uploadcar01
storeFile=../uploadcar01.jks

三：在 android/app/build.gradle文件里面的 android节点里面添加：

signingConfigs {
        release {
            keyAlias localProperties['keyAlias']
            keyPassword localProperties['keyPassword']
            storeFile localProperties['storeFile'] ? file(localProperties['storeFile']) : null
            storePassword localProperties['storePassword']
        }
        debug {
            keyAlias localProperties['keyAlias']
            keyPassword localProperties['keyPassword']
            storeFile localProperties['storeFile'] ? file(localProperties['storeFile']) : null
            storePassword localProperties['storePassword']
        }
   }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
        }
        debug {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }

四： flutter run --release

大功告成，可以在命令行打包apk了
flutter build apk --release --no-sound-null-safety

权限配置：

android/app/src/main/AndroidManifest.xml

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

图标更改：

android/app/src/main/AndroidManifest.xml

   <application
        android:label="车测试"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_car"> 

keytool -list -v -keystore uploadcar01.jks
查看jks文件内容

添加启动图片：

android\app\src\main\res\drawable\launch_background.xml
中添加：

 <item>
        <bitmap
            android:gravity="center"
            android:src="@mipmap/welcome" />
   </item>