一个 toast 是在屏幕上弹出一条信息，它的大小总是包裹着需要显示的内容，并且当前的 Activity 依然是...
rc = sqlite3_open_v2(db_name.c_str(), *??1*, &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, *??2*); if(rc != SQLITE_OK){ std::cout << "error one" << std::endl; exit(-1); } else{ std::cout << "it's working! It's working" << std::endl;} ... sqlite3_c...