Android Studio 3.5.2 - 错误：您当前选择的变体 (app-release-unsigned.apk) 的 apk 未签名

Question

A little background. I have been building/debugging/testing my simple App for a few months with no problems. Build/install on AVD or my actual S9 phone. All worked just fine for months. Now, ready for my first beta release to the Play Store (my first app ever). So, I followed instructions on 'signing' my app. That worked and I uploaded my app bundle to the Play Store. Now I can't build/debug/install at all in Android Studio anymore.

Error: The apk for your currently selected variant (app-release-unsigned.apk) is not signed. Please specify a signing configuration for this variant (release).

Debug (Shift+F9) produces the above error and shows the "Edit configuration" dialog.

I click on the "Fix" button and from there I have no idea what to do. Or how to use these different build configurations.

build.gradle

apply plugin: 'com.android.application'

android {
    signingConfigs {
        debug {
            storeFile file(var)
            storePassword 'xxx'
            keyAlias = 'xxx'
            keyPassword 'xxx'
        }
    }
    compileSdkVersion 29
    buildToolsVersion "29.0.1"
    defaultConfig {
        applicationId "com.birdersdiary.mobile"
        minSdkVersion 15
        targetSdkVersion 29
        versionCode 1
        versionName "b1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'androidx.preference:preference:1.1.0'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

Once I click on the "FIX" button I am taken to the "Run/Debug Configurations" dialog. And from there it is completely oblivious to me what needs to happen in order to Fix the problem.

Any assistance greatly appreciated.

Answer 1

You can solve this problem by doing any of the following

1. You need to switch your build variant back to debug you can do this by holding Ctrl+Alt+A on windows or CMD+ALT+A on mac then typing variant in the search bar, select build variant , this would show the build variant option in the left side of your android studio screen then you should select the variant that has debug appended to the name.

2. If you want to use a release version you need to instruct android studio how to find the keys to sign the apk Add this to your app-level build.gradle file

   apply plugin: 'com.android.application' android { signingConfigs { debug { storeFile file(var) storePassword 'xxx' keyAlias = 'xxx' keyPassword 'xxx' } release { storeFile file(var) storePassword 'xxx' keyAlias = 'xxx' keyPassword 'xxx' } } compileSdkVersion 29 buildToolsVersion "29.0.1" defaultConfig { applicationId "com.birdersdiary.mobile" minSdkVersion 15 targetSdkVersion 29 versionCode 1 versionName "b1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } } dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'androidx.appcompat:appcompat:1.1.0' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' implementation 'com.google.android.material:material:1.0.0' implementation 'androidx.preference:preference:1.1.0' implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0' testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test:runner:1.2.0' androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' }

replace the placeholders with the actual value.

Answer 2

You should se the singing config after defining it. Though I guess name it something other than debug if you're going to use it for release:

buildTypes {
        release {
           minifyEnabled false
           proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

           signingConfig signingConfigs.debug
        }
    }

Answer 3

On the left side of android studio, there is Build Variants . Changing from release to debug worked for me.

Answer 4

Please confirm all the below points are fine.

1. In the left project panel

• Click on the app and open Open Module Settings
• Select Module in the let panel and select app
• In the right panel you can see 3 tabs (Properties, Default Config, and Signing Configs)

2. In signing Configs check below thinks (if you don not have one, please create new key)

• set your jks file location in Store File
• set store password alias and key password as well

3. In Default Config - just check only application id is correct of yours

4. Now in the left panel check do below thinks

• Select Build Variants and scroll down to Signing Config
• Check you have selected any or please select into $signingConfigs.release