Re: Ada 'hello world' for Android; success!

[Brad Moore <brad.moore@shaw.ca>]

On 29/10/2011 3:59 PM, Anatoly Chernyshev wrote:
> I see. So, it's all about making a nice GUI for "Hello world"? Then
> I'm relieved, as I commonly don't do the interface.
> For that simple example below, should I just compile it for jvm, and
> then it can be run on Android?

Yes, Stephen Leake's example shows how to integrate a GUI into an app 
written in Ada on Android. The GUI libraries are written in Java, so Ada 
has to interface with Java to use those.

To build the native Ada console executable however, the jvm isn't
in the picture at all, as I understand it.

I found the following post helpful in getting Ada code to compile on
Android.

http://www.rhinocerus.net/forum/lang-ada/684457-gnatdroid-ada-cross-compiler-arm-android-incorporated-intofreebsd-ports-tree.html

Basically, what I did was create a virtual machine that runs FreeBSD,
on my desktop,
Next I followed the instructions in the above post to install the 
compiler into the virtual machine.

Then I used the gnatmake executable (arm-android-eabi-gnatmake) on the 
virtual machine to cross-compile my source code for Android.

This built the executable, which I then transferred to my smartphone's
sdcard. (I used AndFTP to do the transfer, though in theory one should
also be able to use one of the ssh apps (eg SSHDroid) to transfer from
the virtual machine to the android. I didn't have any luck getting
SSHDroid to work, but AndFTP did work fine.

Since you can't execute files from the sdcard, I had to root the phone,
so that I could then copy the executable to /data/data.

To root my phone, I followed the procedure for SuperOneClick, which
you can find with google.

One rooted, I installed an app called "Terminal Emulator" on my Android, 
which allowed me to enter commands in a linux like environment. I also 
installed BusyBox to give me linux commands I am familiar with.

Within the terminal emulator, I issued

    su
    mv /sdcard/executable_name /data/data
    cd /data/data
    chmod 755 ./executable_name

    then ./executable_name  to run the Ada executable natively.

Brad Moore

>
> On Oct 30, 12:47 am, Brad Moore<brad.mo...@shaw.ca>  wrote:
>> On 29/10/2011 8:46 AM, Anatoly Chernyshev wrote:
>>
>>
>>
>>> Well, I have HTC too, and might be willing to do some programming on
>>> it (to have some use of GPS data for instance). But your example above
>>> just scares me away.
>>> And I'm happy to have no employer to force me digging into this. I
>>> will not approach any Android programming in Ada until it gets back to
>>> the simplicity of e.g.
>>
>>
>> Note if you just interested in writing "Hello World" to a console for
>> Android, you can still use the traditional Hello world program for Ada.
>>
>> namely;
>>
>> with Text_IO; use Text_IO;
>> procedure Hello is
>> begin
>>       Put_Line("Hello, world!");
>> end Hello;
>>
>> You may have to root your phone to get this to execute, but it will run
>> and produce the desired output in a terminal console. It wont show up
>> as an app however.
>>
>> Brad Moore
>