How to rebuild same keystore and certificate with apktool

Question

I only want modified apk but keep keystore and certificate unchange. How to do that. Thank you.

Answer 1

In case you changed the package name then you will need a new keystore and certificate otherwise you can use the saved keystore example: while updating apps.Please read through the link below.

http://developer.android.com/tools/publishing/preparing.html#publishing-build

Answer 2

If you want to update your apk to play store than Before you upload you must consider these things,

• The .apk must be signed with the same private key.
• Package name and signing certificate must match those of the existing version.
• Must incremented android:versionCode and android:versionName in manifest file.

NOW,

• Go to the play store(SignIn),

• Create new app, put name, decription etc and upload that file.

• Make changes/improvements/bug fixed to your app, export it with the SAME signed key, it generates another file.
• Go to the play store, enter the existing app, upload the new file, mark it as active.

Visit Market Upgrade.