请问一下为什么导出函数的指针都是null？

[alienwu2018]

funcPointer.func_createNativeWindow = dlsym(handle, "_Z18createNativeWindowPKcjjb");
// 获取屏幕信息
funcPointer.func_getDisplayInfo = dlsym(handle, "_Z14getDisplayInfov");
// funcPointer.func_setSurfaceWH = dlsym(handle, "_Z12setSurfaceWHjj");
funcPointer.func_initRecord = dlsym(handle, "_Z10initRecordPKcfjj");
funcPointer.func_runRecord = dlsym(handle, "_Z9runRecordPbPFvPhmE");
funcPointer.func_stopRecord = dlsym(handle, "_Z10stopRecordv");
funcPointer.func_getRecordNativeWindow = dlsym(handle, "_Z21getRecordNativeWindowv");

[alienwu2018]

问题已解决，感恩开源