打包发布版时报错 Error: The apk for your currently selected variant cannot be signed. Please specify a signi

当直接运行release版本时，报错

Error: The apk for your currently selected variant cannot be signed. Please specify a signing configuration for this variant (release).

解决报错：要在配置里添加签名

android {
    signingConfigs {
        debug {
            storeFile file('D:\\KotlinDemo\\MyTest\\mykeystore.jks')
            storePassword '123'
            keyPassword '123'
            keyAlias 'key0'
        }
        release {
            storeFile file('D:\\KotlinDemo\\MyTest\\mykeystore.jks')
            storePassword '123'
            keyAlias 'key0'
            keyPassword '123'
        }
    }
    namespace 'com.example.mytest'
    compileSdk 33

    defaultConfig {
        applicationId "com.example.mytest"
        minSdk 21
        targetSdk 33
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

　解决步骤

　点击右侧File → Project Structure →Modules →app→加号  添加名为release的签名配置，填写完点击OK

 再点击Build Variants →app →Build Types → release(如果没有就点击加号添加)→Signing Config →选择刚才的release →OK

 我们会看到app下的build.gradle增加了，以下代码，问题就解决了