Fluent: exception handling

Abnormal information ：Gradle task assembleRelease failed with exit code 1
This message is executing the terminal command ：flutter build apk pack APK when Reported that ,
reason ： No configuration Android Pack and sign ;
Configure signature ：
1、 stay android Create a file under the module “key.properties”, And fill in the key information .（ How to create APP secret key I won't go into that , Baidu once you know ）

storePassword= Your password 
keyPassword= Your password 
keyAlias= Your key alias 
storeFile= Your key path , Such as D:/app_key.jks

2、 stay android/app/build.gradle file Configure the following information ：

def keystorePropertiesFile = rootProject.file("key.properties")
def keystoreProperties = new Properties()
keystoreProperties.load(new FileInputStream(keystorePropertiesFile))

android {

    ... Some information is omitted here ...
    
    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile file(keystoreProperties['storeFile'])
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }
}

Flutter pack APK
Okay , Then you can re execute the packaging command ：> flutter build apk
The installation package is located at ：build\app\outputs\apk\release\app-release.apk