native层日志输出

部分代码如下：

Logger.h代码

//
// Created by Administrator on 2021/12/28.
//

#ifndef EMLIVESDK_LOGGER_H
#define EMLIVESDK_LOGGER_H
#include 
#define Logv( msg , ...) log(Log_Level_V , msg , ##__VA_ARGS__);
#define Logd( msg , ...) log(Log_Level_D , msg , ##__VA_ARGS__);
#define Logi( msg , ...) log(Log_Level_I , msg , ##__VA_ARGS__);
#define Logw( msg , ...) log(Log_Level_W , msg , ##__VA_ARGS__);
#define Loge( msg , ...) log(Log_Level_E , msg , ##__VA_ARGS__);
typedef void (*androidLog)(int level , char * msg) ;

enum LogLevel{
    Log_Level_V = 1,
    Log_Level_D,
    Log_Level_I,
    Log_Level_W,
    Log_Level_E,
};

class Logger{

public:
    
    static void log(int level , const char * msg , va_list args);
    
    static void initLog(androidLog logCb , LogLevel level);

private :
    static androidLog g_LogCb;
    static LogLevel g_LogLevel;
};

void log(int level , const char * msg , ...);
#endif //EMLIVESDK_LOGGER_H

Logger.cpp代码

//
// Created by Administrator on 2021/12/29.
//
#include "Logger.h"
#include 
#include 

LogLevel Logger::g_LogLevel = Log_Level_V;
androidLog Logger::g_LogCb = 0;

void Logger::initLog(androidLog logCb , LogLevel level){
    g_LogCb = logCb;
    g_LogLevel = level;
}
void Logger::log(int level , const char * msg , va_list args){
    if(level < g_LogLevel){
        return;
    }

    if(g_LogCb){
        char msgBuffer[800] = {0};
        vsnprintf(msgBuffer, sizeof(msgBuffer) - 1 , msg, args);
        g_LogCb(level , msgBuffer);
    }else{
        int androidLogLevel;
        switch (level) {
            case Log_Level_V:
                androidLogLevel = ANDROID_LOG_VERBOSE;
                break;
            case Log_Level_D:
                androidLogLevel = ANDROID_LOG_DEBUG;
                break;
            case Log_Level_I:
                androidLogLevel = ANDROID_LOG_INFO;
                break;
            case Log_Level_W:
                androidLogLevel = ANDROID_LOG_WARN;
                break;
            case Log_Level_E:
                androidLogLevel = ANDROID_LOG_ERROR;
                break;
        }
        __android_log_print(androidLogLevel, "EMLogger", msg , args);
    }
}

void log(int level, const char *msg, ...) {
    va_list args;
    va_start(args , msg);
    Logger::log(level , msg , args);
    va_end(args);
}

JniHelper.h

//
// Created by Administrator on 2021/12/27.
//

#ifndef EMLIVESDK_JNIHELPER_H
#define EMLIVESDK_JNIHELPER_H

#include "jni.h"
#include "pthread.h"

class JniHelper {

public:
    static void initJVM(JavaVM* vm);
    static JNIEnv * getEnv();
    static jclass findGClass(const char * name);
    static jclass findGClass(JNIEnv * env , const char * name);

private:
    static void pthread_once_method();
    static void destroyKey(void * value);

private:
    static JavaVM* sJavaVm;
    static pthread_key_t pthreadKey;
    static pthread_once_t pthreadOnce;
};


#endif //EMLIVESDK_JNIHELPER_H

JniHelper.cpp

//
// Created by Administrator on 2021/12/27.
//

#include "JniHelper.h"
#include "Logger.h"
JavaVM * JniHelper::sJavaVm = nullptr;
pthread_key_t JniHelper::pthreadKey = 0;
pthread_once_t JniHelper::pthreadonce = PTHREAD_ONCE_INIT;

void JniHelper::initJVM(JavaVM *vm) {
    sJavaVm = vm;
}

JNIEnv *JniHelper::getEnv() {
    JavaVM * javaVm = sJavaVm;
    pthread_once(&pthreadonce , JniHelper::pthread_once_method);//进程中只执行一次，创建key，注意这里第一个参数必须是PTHREAD_ONCE_INIT
    JNIEnv * jniEnv = static_cast(pthread_getspecific(pthreadKey));//所有线程共享key，但是各个线程有自己的数据存储区

    if(!jniEnv){
        if(javaVm && javaVm->AttachCurrentThread(&jniEnv , nullptr) == JNI_OK){
            pthread_setspecific(pthreadKey , jniEnv);//设置自己线程参数
            Logd("AttachCurrentThread lxs1230 %u" , pthread_self())
        }
    }
    return jniEnv;
}

void JniHelper::pthread_once_method() {
    pthread_key_create(&pthreadKey , JniHelper::destroyKey);
}

void JniHelper::destroyKey(void * value) {

    JNIEnv * jniEnv = static_cast(value);

    if(jniEnv){
//        Logd("DetachCurrentThread lxs1230 %u" , pthread_self())//这里位置不要放到DetachCurrentThread后面，
        JavaVM * javaVm = sJavaVm;
        pthread_setspecific(pthreadKey , nullptr);
        javaVm->DetachCurrentThread();
    }
}

jclass JniHelper::findGClass(const char * name) {

    JNIEnv * jniEnv = JniHelper::getEnv();
    if(jniEnv){
        jclass localClazz = jniEnv->FindClass(name);
        jclass g_jclazz = static_cast(jniEnv->NewGlobalRef(localClazz));
        if(localClazz){
            jniEnv->DeleteLocalRef(localClazz);
        }
        return g_jclazz;
    }
    return nullptr;
}

jclass JniHelper::findGClass(JNIEnv *jniEnv, const char *name) {
    if(jniEnv){
        jclass localClazz = jniEnv->FindClass(name);
        jclass g_jclazz = static_cast(jniEnv->NewGlobalRef(localClazz));
        if(localClazz){
            jniEnv->DeleteLocalRef(localClazz);
        }
        return g_jclazz;
    }
    return nullptr;
}