Hey
Someone directed to this group. After fiddling with AOSP through the
command line for weeks, I recently downloaded eclipse with sdk and ndk
installed. My professor wants me to add security extensions to the android
platform via the NDK, but I have no idea where to start. Here is what he
exactly said:
"Now you need to find the source files, from which the "armeabi-v7a" was
generated (compiled). Then, you can edit or add to the source files and
modify the library to extend for TZ. "
TZ : TrustZone.
I would HIGHLY appreciate it if you could point me in the right direction.
Only have a month left til this summer report is due. Not stressing
though... ... ...
Thanks in advance.
Damola
On Thursday, July 19, 2012 3:53:05 PM UTC+9, Dianne Hackborn wrote:
>
> I really don't understand. How is your native code running at all if you
> haven't loaded the library?
>
> On Wed, Jul 18, 2012 at 1:07 PM, HV <harishv.athr...@gmail.com> wrote:
>
>> The desktop icon is for the simple java app (JNIDemo.apk). I guess what I
>> need is a way of calling a Java method from a native library without having
>> to do a load library from the Java app. Is that possible?
>>
>> If I load the library from JNIdemo, then there will be 2 contexts of the
>> library, one from JNIDemo and the other from where I actually need to
>> launch DragonHunter, so that wont work for my requirement
>>
>>
>> On Tuesday, July 17, 2012 11:55:01 PM UTC-7, Dianne Hackborn wrote:
>>>
>>> What is "DesktopIcon"? I don't understand what you are describing.
>>>
>>> On Tue, Jul 17, 2012 at 2:46 PM, HV <harishv.athr...@gmail.com> wrote:
>>>
>>>> Ok, I got this working. A simple JAVA app (say JNIDemo) that calls a
>>>> native method (in say NativeLib.so), which in turn calls back a JNIDemo
>>>> method. All of this is working seamlessly. Now, the next problem I have is
>>>> context related. I have a desktop icon which is supposed to launch an
>>>> Android app (such as DragonHunter) and that is failing:
>>>>
>>>> 1. JNIDemo -> NativeLib -> JNIDemo (works fine)
>>>> 2. DesktopIcon -> NativeLib -> JNIDemo (fails to launch an app such as
>>>> DragonHunter)
>>>>
>>>> Now, since 1 & 2 are running in separate processes, the JNI variables
>>>> are no longer valid in #2. Any ideas?
>>>>
>>>> On Saturday, July 7, 2012 11:40:05 PM UTC-7, HV wrote:
>>>>>
>>>>> Thanks Dianne, that's what I thought, hence this question. Glad to
>>>>> know that using 'am' is not the way to go. Could you please provide a
>>>>> link
>>>>> to the SDK where it talks about this? If there is an example, that'll be
>>>>> awesome
>>>>>
>>>>> Thanks again
>>>>> HV
>>>>>
>>>>> On Saturday, July 7, 2012 5:13:07 PM UTC-7, Dianne Hackborn wrote:
>>>>>>
>>>>>> No don't do that, the am command is not part of the SDK, and doing it
>>>>>> this way is horrible inefficient (you need to spin up and initialize a
>>>>>> fresh Dalvik vm for the am command, which takes a second or more), and
>>>>>> usually totally broken because you are not launching the activity from
>>>>>> your
>>>>>> own context for the system to correctly associate the call with you.
>>>>>>
>>>>>> And on top of that, your example here uses an explicit component name
>>>>>> of the browser activity, which is *completely* an implementation detail:
>>>>>> it
>>>>>> is likely to be different across different devices, it is *definitely*
>>>>>> different on devices that ship with Chrome as the default browser, etc.
>>>>>>
>>>>>> This is totally wrong.
>>>>>>
>>>>>> The right thing to do is follow the SDK and do it the right way, the
>>>>>> way it is documented. If you need to write a little bit of JNI code
>>>>>> (and
>>>>>> it *is* a little bit, just a method call into your own Java method that
>>>>>> uses the SDK), then that is what you do.
>>>>>>
>>>>>> On Fri, Jul 6, 2012 at 11:58 PM, Sandeep Kumar <
>>>>>> sandeepkumar....@gmail.com> wrote:
>>>>>>
>>>>>>> try below:-
>>>>>>>
>>>>>>> ret = execl("/system/bin/sh", "sh", "-c", "am start -a
>>>>>>> android.intent.action.MAIN -n
>>>>>>> com.android.browser/.**BrowserAc**tivity", (char *)NULL);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Saturday, July 7, 2012 3:51:58 AM UTC+9, HV wrote:
>>>>>>>>
>>>>>>>> Wanted to know what is the best practice to launch apps from
>>>>>>>> native code? Is using 'am' forbidden? It has to be via the system call
>>>>>>>> though, like system("am start ..."); Will 'am' support be discontinued
>>>>>>>> going forward?
>>>>>>>>
>>>>>>>> Is there any alternative method?
>>>>>>>>
>>>>>>>> Thanks much
>>>>>>>> HV
>>>>>>>>
>>>>>>> --
>>>>>>> unsubscribe:
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>>>>>>> website:
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>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Dianne Hackborn
>>>>>> Android framework engineer
>>>>>> hack...@android.com
>>>>>>
>>>>>> Note: please don't send private questions to me, as I don't have time
>>>>>> to provide private support, and so won't reply to such e-mails. All
>>>>>> such
>>>>>> questions should be posted on public forums, where I and others can see
>>>>>> and
>>>>>> answer them.
>>>>>>
>>>>>> --
>>>> unsubscribe:
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>>>> website:
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>>>>
>>>
>>>
>>>
>>> --
>>> Dianne Hackborn
>>> Android framework engineer
>>> hack...@android.com
>>>
>>> Note: please don't send private questions to me, as I don't have time to
>>> provide private support, and so won't reply to such e-mails. All such
>>> questions should be posted on public forums, where I and others can see and
>>> answer them.
>>>
>>> --
>> unsubscribe: android-porting+unsubscr...@googlegroups.com
>> website: http://groups.google.com/group/android-porting
>>
>
>
>
> --
> Dianne Hackborn
> Android framework engineer
> hack...@android.com
>
> Note: please don't send private questions to me, as I don't have time to
> provide private support, and so won't reply to such e-mails. All such
> questions should be posted on public forums, where I and others can see and
> answer them.
>
>
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