can't serial port Native open return null about android-serialport-api HOT 10 CLOSED

do you have a kernel that has serial port enabled? if so, please recompile the 
code with O_DIRECT removed from open() (see another issue reported here). 

android 1.6 it work! but android 2.2  have problem.
serialport  driver  enable in kernel
I think that  beacause  Davik vitrual machine  doesn't understand JNI_ONLOAD.
Libserial_port.so isn't loaded
full  logcat
09-02 16:42:58.882: DEBUG/dalvikvm(4185): Trying to load lib 
/data/data/android.serialport.sample/lib/libserial_port.so0x434fb6f809-02 
16:42:58.892: DEBUG/dalvikvm(4185): Added shared lib 
/data/data/android.serialport.sample/lib/libserial_port.so 0x434fb6f809-02 
16:42:58.892: DEBUG/dalvikvm(4185): No JNI_OnLoad found in 
/data/data/android.serialport.sample/libserial_port.so not found

android 2.2 works with the application. I've been running it. You can try 
download the source code and compile it yourself. You need to compile the 
native code as well as the java code. Otherwise, you will get missing shared 
library error. 

Hi All, I'm facing the same issue with Android 2.1 device.

Please help me to resolve this.

I had the same problem at a nexus one, with cyanogenmod 7.0.2.1, fixed it using 
comment 1.

me too ,using comment 1 is working,thx;

using comment 1，the application is running on android 2.2,thanks!

[deleted comment]

here the application not running, i'm using on android 2.3.4 in beagleboard rev 
C4, help plaese?