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I am trying to sign apk by using apksigner and zipalign tools, which are located in jdk/bin folder. I have already set path environment variable to it. Now what I want to do is, execute some shell commands which signs my apk through java code in ubuntu. Commands are,

command-1 : 

keytool -genkey -v -keystore /Desktop/my-release-key.jks -keyalg RSA -keysize 2048 -validity 10000 -alias app

This command required some inputs at run time, like first name last name etc.

command-2 : 

./zipalign -v 4 inputAPK.apk outputAPK.apk

command-3 : 

apksigner sign --min-sdk-version 15 --ks my-release-key.jks outputAPK.apk

command-4 :

apksigner verify --min-sdk-version 15 outputAPK.apk

All above 4 commands I want to execute it through java code in ubuntu environment, how can I achieve it?

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  • Whats the problem that you're facing? Commented Nov 25, 2016 at 11:51
  • Actually I am new to java programming, so don't know the exact solution for it, I mean how can I execute above 4 commands through java program and also at runtime how can I send inputs to the command line in ubuntu. Commented Nov 25, 2016 at 11:56
  • 1
    Possible duplicate of Run cmd commands through java Commented Nov 25, 2016 at 13:16
  • I tried with the link you suggested but while running second command getting exception like, java.io.IOException: Cannot run program "zipalign -v 4 myInput.apk myOutput.apk": error=2, No such file or directory Commented Nov 26, 2016 at 5:30

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Oh k. You can use java.lang.Runtime.exec to run simple code. Have a look at these sites:

http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#exec(java.lang.String)

http://alvinalexander.com/java/edu/pj/pj010016

https://www.mkyong.com/java/how-to-execute-shell-command-from-java/

Also you can use Process.getOutputStream() method to get input. Whatever data you enter will be passed to your input stream.

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6 Comments

I tried with the link you suggested but while running second command getting exception like, java.io.IOException: Cannot run program "zipalign -v 4 myInput.apk myOutput.apk": error=2, No such file or directory
In that case either you are pointing to a wrong location as the error says... or you need to do this - sudo apt-get update sudo apt-get install gcc-multilib lib32z1 lib32stdc++6
zipalign tool is located in Android/sdk/build tools/24.0.3/zipalign. I have already located this path in environment variable, but even though not working.
How about your OS? x64 or x32.? Also check your build.xml.
Hey! this post may help you.
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