How to sign an Android app for Google Play
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore [path]/key.keystore app-unsigned.apk keyNameAlias
zipalign -v 4 app-unsigned.apk app-signed.apk
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore [path]/key.keystore app-unsigned.apk keyNameAlias
zipalign -v 4 app-unsigned.apk app-signed.apk