How to Sign an Already Compiled Apk

Question

I ve decoded an APK with apktool  as the original source code was lost  so I could fix some issues with the layout xml files  I ve then rebuilt it back up with apktool and when I tried to install it on my device  using adb  adb install appname apk  it gave me this error    INSTALL PARSE FAILED NO CERTIFICATES    the original apk however was signed by a keystore  on eclipse IDE   this one isn t  how can I sign it properly with it s original keystone file outside Eclipse

User · Accepted Answer

create a key using   keytool -genkey -v -keystore my-release-key keystore -alias alias name -keyalg RSA -keysize 2048 -validity 10000   then sign the apk using     jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key keystore my application apk alias name   check here for more info

User · Answer

Updated answer  Check https   shatter-box com knowledgebase android-apk-signing-tool-apk-signer   Old answer  check apk-signer a nice way to sign your app

User · Answer

fastest way is by signing with the debug keystore    jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore    android debug keystore app apk androiddebugkey -storepass android   or on Windows   jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore  USERPROFILE   android debug keystore test apk androiddebugkey -storepass android

User · Answer

You use jarsigner to sign APK s  You don t have to sign with the original keystore  just generate a new one  Read up on the details  http   developer android com guide publishing app-signing html

User · Answer

Automated Process   Use this tool  uses the new apksigner from Google    https   github com patrickfav uber-apk-signer   Disclaimer  Im the developer     Manual Process   Step 1  Generate Keystore  only once   You need to generate a keystore once and use it to sign your unsigned apk  Use the keytool provided by the JDK found in  JAVA HOME  bin   keytool -genkey -v -keystore my keystore -keyalg RSA -keysize 2048 -validity 10000 -alias app   Step 2 or 4  Zipalign  zipalign which is a tool provided by the Android SDK found in e g   ANDROID HOME  sdk build-tools 24 0 2  is a mandatory optimization step if you want to upload the apk to the Play Store   zipalign -p 4 my apk my-aligned apk   Note  when using the old jarsigner you need to zipalign AFTER signing  When using the new apksigner method you do it BEFORE signing  confusing  I know   Invoking zipalign before apksigner works fine because apksigner preserves APK alignment and compression  unlike jarsigner    You can verify the alignment with  zipalign -c 4 my-aligned apk   Step 3  Sign  amp  Verify  Using build-tools 24 0 2 and older  Use jarsigner which  like the keytool  comes with the JDK distribution found in   JAVA HOME  bin  and use it like so   jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my keystore my-app apk my alias name   and can be verified with  jarsigner -verify -verbose my application apk   Using build-tools 24 0 3 and newer  Android 7 0 introduces APK Signature Scheme v2  a new app-signing scheme that offers faster app install times and more protection against unauthorized alterations to APK files  See here and here for more details   Therefore  Google implemented their own apk signer called apksigner  duh   The script file can be found in  ANDROID HOME  sdk build-tools 24 0 3   the  jar is in the  lib subfolder   Use it like this  apksigner sign --ks my keystore my-app apk --ks-key-alias alias name   and can be verified with  apksigner verify my-app apk   The official documentation can be found here

User · Answer

For those of you who don t want to create a bat file to edit for every project  or dont want to remember all the commands associated with the keytools and jarsigner programs and just want to get it done in one process use this program   http   lukealderton com projects programs android-apk-signer-aligner aspx  I built it because I was fed up with the lengthy process of having to type all the file locations every time   This program can save your configuration so the next time you start it  you just need to hit Generate an it will handle it for you  That s it   No install required  it s completely portable and saves its configurations in a CSV in the same folder

[android] How to Sign an Already Compiled Apk

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