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#undef NDEBUG       //打开LOGV/LOGI/LOGD
#define LOG_NDEBUG   0  //打开LOGV
#define LOG_NIDEBUG  0  //打开LOGI
#define LOG_NDDEBUG 0 //打开LOGD

举例，如果要看AndroidRuntime的LOGI和LOGD，可以有这样2种写法：

1

#define LOG_TAG "AndroidRuntime"
#undef NDEBUG
#define LOG_NDEBUG 1
#include <utils/Log.h>

2

#define LOG_TAG "AndroidRuntime"
#define LOG_NIDEBUG 0
#define LOG_NDDEBUG 0
#include <utils/Log.h>

• 如何在android native编程中使用logCat:http://m.cnblogs.com/41930/1584120.html