exec shell script from android application

[jintao]

Hi,

I need to execute some shell command, like "ls", in android java
application, and render the returned output of "ls" command in the
android java app.

Is this possible to get this done with JNI? Any guidance would be
greatly appreciated!

Thanks a lot!

jintao

[Onur Cinar]

Hi,

Since you will be doing the rendering in Java, you can avoid using JNI if you rely on the java.lang.Runtime's exec() methods:

http://developer.android.com/reference/java/lang/Runtime.html

When you do an exec() it will return a Process instance, and then you can access its output and input through getInputStream/getOutputStream.


The same is possible with POSIX popen() but it is not currently supported by bionic, so you can't use that in Android JNI. Instead you can probably use the system() and pipe the output to a file and then read that file afterwards.  Looks like the Java approach will be cleaner if you will be doing the rendering in Java.

Regards,

-onur

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[Tao Jin]

Hi Onur,

Thanks tons! Really helpful!

br,

jintao