eclipse can not resolve android native code

Question

I am trying to integrate the Android SerialPort API into my project, but I have some problems doing so.

• Eclipse is not resolving all JNI and native related methods and fields.. This is the beginning of the SerialPort.c file of the Android SerialPort API:

  #include <termios.h>
  #include <unistd.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <fcntl.h>
  #include <string.h>
  #include <jni.h>
  
  #include "SerialPort.h"
  
  #include "android/log.h"
  static const char *TAG="serial_port";
  #define LOGI(fmt, args...) __android_log_print(ANDROID_LOG_INFO,  TAG, fmt, ##args)
  #define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, TAG, fmt, ##args)
  #define LOGE(fmt, args...) __android_log_print(ANDROID_LOG_ERROR, TAG, fmt, ##args)
  

  The fist define-statement works, but in the other two, eclipse is marking ANDROID_LOG_DEBUG and ANDROID_LOG_ERROR with Symbol XXX could not be resolved, as well as every call of a method of JNIEnv *env inside the methods of the serial port.

  But there are no errors on the JNIEXPORT or JNICALL statements.

• Problem one occured when I was trying to solve this problem. I downloaded all files for library and copied them in the directories given on the website. But it seems that something went wrong with the JNI part and I was not able to call open() to get my serial device.

   11-19 14:18:22.232: D/dalvikvm(17898): Trying to load lib /data/data/master.androidsirfparser/lib/libserial_port.so 0x416a8570
   11-19 14:18:22.232: D/dalvikvm(17898): Added shared lib /data/data/master.androidsirfparser/lib/libserial_port.so 0x416a8570
   11-19 14:18:22.232: D/dalvikvm(17898): No JNI_OnLoad found in /data/data/master.androidsirfparser/lib/libserial_port.so 0x416a8570, skipping init
   11-19 14:18:22.232: W/dalvikvm(17898): No implementation found for native Lmaster/serial/SerialPort;.open (Ljava/lang/String;II)Ljava/io/FileDescriptor;
   11-19 14:18:22.240: W/dalvikvm(17898): threadid=11: thread exiting with uncaught exception (group=0x40a471f8)
   11-19 14:18:22.240: E/AndroidRuntime(17898): FATAL EXCEPTION: Thread-651
   11-19 14:18:22.240: E/AndroidRuntime(17898): java.lang.UnsatisfiedLinkError: open
   11-19 14:18:22.240: E/AndroidRuntime(17898):   at master.serial.SerialPort.open(Native Method)
   11-19 14:18:22.240: E/AndroidRuntime(17898):   at master.serial.SerialPort.<init>(SerialPort.java:61)
   11-19 14:18:22.240: E/AndroidRuntime(17898):   at master.androidsirfparser.ReadThread.init(ReadThread.java:38)
   11-19 14:18:22.240: E/AndroidRuntime(17898):   at master.androidsirfparser.ReadThread.run(ReadThread.java:48)
  

  I always get the "no implementation found"-message.

I have to solve problem one first, in order to work on problem two, because Eclipse does not allow me to start my project without solving the compilation error in the code.

Answer 1

I re-installed my java platform, eclipse IDE, added the android eclipse plugin and now it works. I have no clue why.