ODROID-Magazine-201506

ANDROID DEVELOPMENT
The Android.mk is similar to other projects inside the external/
directory. Notice that there are 2 files being copied as part
of the build process:
• httpd.conf → contains the configuration for the webserver
• mime.types → contains the file types that are allowable by
the webserver app
Once you have successfully compiled the ODROID-U3
Android source code, you will see a gohttp executable file inside
the out/target/product/odroidu/system/bin directory, as
shown in Figure 2.
Initialization
The last step of the porting is to run the gohttp application
as part of Android startup process. In order to do that, we
will need to modify the file called init.odroidu.rc inside device/
hardkernel/odroidu/conf directory, as shown in Figure 3.
Figure 4: mkdir for creating directory
We also need to add a service to start gohttp:
Figure 2: gohttp executable
The webserver is configured to listen at port 8888, which is
declared inside the httpd.conf file.
The other item that need to be modified inside the app is
the logging, since it make sense to make sure that the app sends
any logging information to the logcat service. Here is the new
code that is added inside GoHttp.c that will do the logging:
#ifdef DEBUG_ANDROID
#include
#define LOG_TAG “gohttp”
#define PRINT(...) __android_log_print(ANDROID_LOG_
INFO, LOG_TAG, __VA_ARGS__)
#else
#define PRINT(...) fprintf(stdout, “%s\n”, __VA_
ARGS__)
#endif
service gohttp /system/bin/gohttp
class core
Under the “on post-fs-data” section, you need to add the
statement indicated in Figure 4. This statement is used to create
the directory where you will put the .html files that you
want to make available for the user to access.
Once you boot up your ODROID-U3, you can then copy
an index.html file to /data/www folder and access it via the
server by using any browser to navigate to the local site at
http://:8888/index.html.
If you’d like to learn more about Android programming,
contact Nanik directly, or follow his latest posts, please visit his
website at http://naniktolaram.com.
With Nanik’s help, you’re now fully equipped to create your
own custom Android service
Figure 3: init file for ODROID-U3
ODROID MAGAZINE 47