exec command android native code

Question

I am trying to launch an android applications from native code.

In adb shell we can launch applications using "am" command.

Link:

How to run (not only install) an android application using .apk file?

Is there any way to invoke this "am" command through C code?

I tried the following line but exec is returning -1:

  ret = execl("/system/bin/am", "start", "-a", "android.intent.action.MAIN",
 "-n", "com.android.settings/.Settings", (char *)NULL);

Is this right or not?

in android only.. i put it in a working c code in android.... exec is failing — Bineesh
– Bineesh, Commented Mar 2, 2012 at 12:34
Does /system/bin/am start -a android.intent.action.MAIN -n com.android.settings/.Settings works launched from terminal? — m0skit0
– m0skit0, Commented Mar 2, 2012 at 13:40
ya its working in adb shell.. it will launch the settings menu — Bineesh
– Bineesh, Commented Mar 2, 2012 at 14:33

FelipeAls · Accepted Answer · 2012-03-04 11:11:44Z

1

I got the answer... I 'exec'ed the shell itself and gave it the command... It worked

ret = execl("/system/bin/sh", "sh", "-c", "am start -a android.intent.action.MAIN -n   com.android.browser/.BrowserActivity", (char *)NULL);

Thanks to m0skit0, Padma Kumar, Yuri ...

edited Mar 4, 2012 at 11:11

FelipeAls

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answered Mar 3, 2012 at 11:16

Bineesh

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1 Comment

Chris Stratton Over a year ago

It's not entirely clear why using a shell would make a difference here. However note that calling an exec family function without first calling fork() replaces the calling program - which, if that was an android app will look like a crash.

Dartan Li · Accepted Answer · 2015-02-09 02:38:13Z

0

you should use system() family method ,first it will fork child process and invoke shell then return,so it will not block android main thread

answered Feb 9, 2015 at 2:38

Dartan Li

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2 Comments

Nathan Tuggy Over a year ago

This should maybe have been a comment, not an answer. With a bit more rep, you will be able to post comments.

vharron Over a year ago

system will block whatever thread it is called from. So don't call this from your main thread.

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