1、在app\libs中增加對應的so
2、在build.gradle中增加
externalNativeBuild {
? ? cmake {
? ? ? ? path file('src/main/cpp/CMakeLists.txt')
? ? }
}
sourceSets {
? ? main {
? ? ? ? jniLibs.srcDirs = ["libs"]
? ? }
}
3、CMakeList.txt文件
cmake_minimum_required(VERSION 3.22.1)
project("test")
add_library(test SHARED
? ? ? ? layer3/Layer3.cpp
? ? ? ? )
find_library( log-lib log )
target_link_libraries(test ${log-lib})
include_directories(./include)
4、在include下包含對應的頭文件
5、Layer3.cpp
#include <dlfcn.h>
#include <pthread.h>
#include <android/log.h>
#include <jni.h>
#define SO_PATH? ? "libother.so"
#define? LOGE(...)? __android_log_print(ANDROID_LOG_ERROR,"lmy",__VA_ARGS__)
#define? LOGI(...)? __android_log_print(ANDROID_LOG_INFO,"lmy",__VA_ARGS__)
typedef ULONG (*Test_f)(const char *name);
typedef struct {
? ? Test_f? TestFn;
} ApiTable;
static ApiTable g_ApiTable;
static void *g_libHandle = NULL;
static pthread_mutex_t g_libHandleLock = PTHREAD_MUTEX_INITIALIZER;
static ULONG GetBasicApiSymbol(ApiTable *ApiTable) {
? ? ApiTable->TestFn = (Test_f) (dlsym(g_libHandle, "TEST"));
? ? if (ApiTable->TestFn == NULL) {
? ? ? ? LOGE("get symbol TEST failed\n");
? ? ? ? return 0xFFFF0000;
? ? }
? ? return 0;
}
static ULONG GetApiSymbol() {
? ? ApiTable apiTable = {0};
? ? (void)pthread_mutex_lock(&g_libHandleLock);
? ? g_libHandle = dlopen(SO_PATH, RTLD_LAZY);
? ? if (g_libHandle?== NULL) {
? ? ? ? (void) pthread_mutex_unlock(&g_libHandleLock);
? ? ? ? return 1;
? ? }
? ? if (GetBasicApiSymbol(&apiTable?) != 0) {
? ? ? ? LOGE("get symbol failed\n");
? ? ? ? goto ERROR;
? ? }
? ? g_ApiTable = apiTable?;
? ? (void) pthread_mutex_unlock(&g_libHandleLock);
? ? return 0;
? ? ERROR:
? ? dlclose(g_libHandle);
? ? g_libHandle = NULL;
? ? (void) pthread_mutex_unlock(&g_libHandleLock);
? ? return 0xFFFF0000;
}
extern "C" JNIEXPORT long JNICALL
? ? ? ? Java_com_xxx_Native_init(JNIEnv
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? *env,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? jobject instance){
? ? GetApiSymbol();
? ? ULONG? re =g_ApiTable.TestFn("hello world");
? ? LOGI("0x%x",re);
? ? return re;
}
