JNI Output Log Information

1, modify the ANDROID.MK

If the resulting library file is a ". So file", add the following in Android.mk:

local_ldlibs:=-l$ (sysroot)/usr/lib-llog

If the generated library file is ". A file", add the following in Android.mk:

Local_ldlibs:=-llog

2 referencing a log header file in a. C or. cpp file

Add the following content:

// introduction of log header file #include   // log Tag #define  tag    "hello_load"//  define info #define LOGI (...) __android_log_ Print (android_log_info,tag,__va_args__)//  define debug information #define LOGD (...) __android_ Log_print (Android_log_debug, TAG, __va_args__)//  define error information #define LOGE (...) __android_ Log_print (android_log_error,tag,__va_args__)

Android_log_info: is the log level;
Tag: is the label to be filtered and can be filtered in the Logcat view.
__va_args__: is the actual log content.
After completing the 2 steps above, we can add Logi, LOGD, loge to print the information in the. c/cpp file!

JNI output Log information