Any simple way to log in Android NDK code?

Question

I\'m looking for a way to easily debug C code in an Android NDK application using Eclipse. I\'ve read ways to debug the app using gdb or something similar but what I want i

Answer 1

The easiest way is probably to redirect printf() statements to the system log (based on the "Viewing stdout and stderr" section of the official ADB reference manual.

Type these 3 commands on a command line:

adb shell stop
adb shell setprop log.redirect-stdio true
adb shell start

Then you can view the output of your "printf()" statements by looking at the "LogCat" window of Eclipse Debugger, or by typing this on a command line:

adb logcat

Just be aware that since the data is buffered before transferring from the emulator or device, you should definitely flush the stdout buffer, eg:

printf("Hello, I am %d years old!\n", 30);
fflush(stdout);

You should then see a log message starting with "I/stdout:"