Debug header to log to Android, don't forget to add LOCAL_LDLIBS := -llog to Android.mk
#ifndef _androidlog_h_
#define _androidlog_h_
#include <android/log.h>
#define LOG_TAG "your_tag_here"
#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__))
#define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__))
#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__))
#endif