In build.grandle write
android {
signingConfigs {
release{
keyAlias 'myalias'
keyPassword 'somepass'
storeFile file('C://Keystore/my.keystore')
storePassword 'somepass'
}
}
defaultConfig {
applicationId '/com/....myapp.apk'
minSdkVersion 9
targetSdkVersion 26
versionCode 30
versionName '19.3'
signingConfig signingConfigs.release
}
}