Android IntentService的依赖注入不'；行不通

我想创建TCP_客户端，它在许多活动中向服务器发送数据。我决定使用依赖注入将所有配置相同的客户端注入到所有客户端。不幸的是，它在启动时停止工作

我的应用程序模块

val appModule = module {
    single<ConnectionService> { ConnectionServiceTcp("192.168.0.1", 8888) }
}

然后我收到

    java.lang.RuntimeException: Unable to instantiate service connection.impl.ConnectionServiceTcp: java.lang.InstantiationException: java.lang.Class<connection.impl.ConnectionServiceTcp> has no zero argument constructor

java.lang.RuntimeException:无法实例化服务连接。impl.ConnectionServiceCp:java.lang.InstanceException:java.lang.Class没有零参数构造函数

---

我找不到一种方法来注入后台客户端来发送TCP请求

就像活动、片段或其他一些平台组件一样，Android系统意味着服务应该有一个单一的无参数构造函数。系统在服务类中查找默认构造函数，并使用反射调用它。这就是为什么禁止添加非默认构造函数（即带参数的构造函数）

要将依赖项注入到服务中，您应该像在活动中一样（声明一个字段并使用by inject（）delegate将其注入）。因此最终代码如下所示：

class ConnectionServiceTcp()
    : IntentService("TCP_CLIENT"), ConnectionService {

    private val ipAddress: String by inject()
    private val port : Int by inject()
    private var client : Socket? = null

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        super.onStartCommand(intent, flags, startId)
        return START_STICKY
    }

    override fun onHandleIntent(intent: Intent?) {
        startTcpServer()
    }

    private fun startTcpServer() {
        client = Socket(ipAddress, port)
    }

    override fun isConnectedToServer(): Boolean {
        Log.println(Log.INFO, null, "Adres = ${client?.localAddress} port = ${client?.localPort}")
        return false
    }
}

class MainActivity : AppCompatActivity() {

    private val connectionService : ConnectionService by inject()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        startTcpServer()
    }

    private fun startTcpServer() {
        val serverTcp = Intent(this, ConnectionServiceTcp::class.java)
        startService(serverTcp)
    }

    java.lang.RuntimeException: Unable to instantiate service connection.impl.ConnectionServiceTcp: java.lang.InstantiationException: java.lang.Class<connection.impl.ConnectionServiceTcp> has no zero argument constructor

class ConnectionServiceTcp()
    : IntentService("TCP_CLIENT"), ConnectionService {

    private val ipAddress: String by inject()
    private val port : Int by inject()
    private var client : Socket? = null

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        super.onStartCommand(intent, flags, startId)
        return START_STICKY
    }

    override fun onHandleIntent(intent: Intent?) {
        startTcpServer()
    }

    private fun startTcpServer() {
        client = Socket(ipAddress, port)
    }

    override fun isConnectedToServer(): Boolean {
        Log.println(Log.INFO, null, "Adres = ${client?.localAddress} port = ${client?.localPort}")
        return false
    }
}