Android NDK （JNI）在 .c或 .cpp下打印LOG

#include <string.h>
#include <jni.h>
#include <android/log.h>

#define  LOG_TAG    "mylog"
#define  LOGI(...)  __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)

/* This is a trivial JNI example where we use a native method
* to return a new VM String. See the corresponding Java source
* file located at:
*
*   apps/samples/hello-jni/project/src/com/example/hellojni/HelloJni.java
*/
jstring
Java_com_example_jni_HFHelloJni_stringFromJNI( JNIEnv* env,
jobject thiz )
{
LOGI("debug log success\n");
return (*env)->NewStringUTF(env, "Hello from JNI !");
}

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := hello-jni
LOCAL_SRC_FILES := hello-jni.c

LOCAL_LDLIBS := -llog

include $(BUILD_SHARED_LIBRARY)