传递上下文以在Room中存储数据

Question

我正在尝试使用Room库将接收到的数据保存到本地存储。我创建了一个数据库类，在其中我定义了我需要的参数，并定义了上下文

还有一个类，我在其中定义数据库所需的内容。但我的问题是我无法传递上下文。在线db = NetworkDatabase.getInstance(this)我得到一个Type mismatch error: Required:Context Found:Pocket Scout Interceptor.

请告诉我怎样才能改正我的错误。

class PocketScoutInterceptor() : Interceptor {
lateinit var db: NetworkDatabase
lateinit var dao: PacketDao
fun buildPacket(timestamp: Long, duration: Double, request: Request, response: Response, ) {
val reqBody = request.body
val respBody = response.body?.string()
db = NetworkDatabase.getInstance(this)
dao = db.packetDao()
val packet = Packet(
id = 0,
userId = PocketScoutConfig.userId,
deviceId = PocketScoutConfig.deviceId,
sessionId = PocketScoutConfig.sessionId,
timestamp = timestamp,
duration = duration.roundToInt(),
protocol = "http",
request = room.entities.Request(
request_method = request.method,
request_url = request.url.toUrl().toString(),
request_headers = request.headers.toString(),
request_body = (reqBody?.toString() ?: ""),
request_size = (reqBody?.toString()?.length ?: 0),
),
room.entities.Response(
response_code = response.code,
response_headers = response.headers.toString(),
response_body = (respBody ?: ""),
response_size = (respBody?.length ?: 0),
)
)
dao.add(packet)
}
}

Answer 1

创建db的代码需要context作为参数：NetworkDatabase.getInstance(this)。因此，您可以将上下文作为参数传递给拦截器，例如：

class PocketScoutInterceptor(val context: Context) : Interceptor {
...
NetworkDatabase.getInstance(context)

传递应用程序上下文，而不是活动以避免内存泄漏。