ndk 打印log

在进行NDK开发的时候 调试阶段我们希望把一些信息打印到终端 以方便我们进行调试

但是在C C++ 代码里面的信息 怎么打印Eclipse的Logcat里面呢

 Copyright (C) 2009 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
LOCAL_PATH := $(call my-dir)


include $(CLEAR_VARS)


LOCAL_MODULE    := hello
LOCAL_SRC_FILES := Hello.c
LOCAL_LDLIBS := -llog


include $(BUILD_SHARED_LIBRARY)

#include <stdio.h>
#include <com_example_jni_work_MyActivity.h>
#include<android/log.h>
#define LOG_TAG "wuhan" // 这个是自定义的LOG的标识
#undef LOG // 取消默认的LOG
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__) // 定义LOG类型
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__) // 定义LOG类型
#define LOGW(...) __android_log_print(ANDROID_LOG_WARN,LOG_TAG,__VA_ARGS__) // 定义LOG类型
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__) // 定义LOG类型
#define LOGF(...) __android_log_print(ANDROID_LOG_FATAL,LOG_TAG,__VA_ARGS__) // 定义LOG类型
JNIEXPORT jstring JNICALL Java_com_example_jni_1work_MyActivity_getFromJni
  (JNIEnv * env, jobject jobj){
     char * tmp="hello world!";
     LOGI("Android Jni Log test !==%s==\n",tmp);
     return (*env)->NewStringUTF(env, "Hello from JNI !");
  }