Android Studio 2.3 Signature Step Verification v1 (Jar Signature), v2 (Full Apk Signature) Disabled

Question

Android Studio 2.3 will generate signed second-level signature authentication Apk v1 (Jar signature), v2 (Full Apk signature) How do I enable it?

Signed Apk Second Step screenshot below gradle files:

My build.gradle file: -

android { compileSdkVersion 25 buildToolsVersion '25.0.2' dataBinding { enabled = true } defaultConfig { applicationId 'com.revolution.it' minSdkVersion 15 targetSdkVersion 25 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" vectorDrawables.useSupportLibrary true multiDexEnabled true } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } debug { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } productFlavors { } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) androidTestCompile 'com.android.support.test.espresso:espresso-contrib:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' exclude group: 'com.android.support', module: 'support-v4' exclude group: 'com.android.support', module: 'design' exclude group: 'com.android.support', module: 'recyclerview-v7' } compile 'com.android.support:appcompat-v7:25.1.0' compile 'com.android.support:design:25.1.0' compile 'com.android.support:support-v4:25.1.0' compile 'com.squareup.retrofit2:retrofit:2.1.0' compile 'com.squareup.retrofit2:converter-gson:2.1.0' compile 'com.squareup.okhttp3:logging-interceptor:3.3.1' compile 'uk.co.chrisjenx:calligraphy:2.2.0' compile 'org.greenrobot:eventbus:3.0.0' compile 'com.squareup.picasso:picasso:2.5.2' compile 'com.google.firebase:firebase-messaging:10.0.1' compile 'com.google.firebase:firebase-crash:10.0.1' compile 'org.apache.directory.studio:org.apache.commons.io:2.4' // Image and file picker compile 'com.droidninja:filepicker:1.0.8' compile 'com.android.support:multidex:1.0.1' compile 'com.google.android.gms:play-services-location:10.0.1' testCompile 'junit:junit:4.12' debugCompile 'com.amitshekhar.android:debug-db:1.0.0' } apply plugin: 'com.google.gms.google-services' 

Answer 1

Finally, I found a solution to the problem

v1 or v2. Signature variation is allowed when I upgrade gradel no build.gradle version (Proejct level)
classpath 'com.android.tools.build:gradle:2.3.0'

my old build.gradle (Project Level)

 buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.2.3' } } allprojects { ........ } task clean(type: Delete) { ...... } 

my update build.gradle (project level)

 buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.3.0' } } allprojects { ...... } task clean(type: Delete) { ...... }