jni下添加打印信息

#include <android/log.h>

__android_log_print(6,"mydpi"," Open Device Fail!\n");

然后还要在Android.mk下 添加

LOCAL_LDLIBS := -llog

否则提示__android_log_print未定义

Android.mk:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := demo

LOCAL_SRC_FILES := demo.cpp

LOCAL_LDLIBS := -llog//-------

include $(BUILD_SHARED_LIBRARY)