java - Android:Socket-Connection 导致延迟和大量 GC 操作

Question

这是一个带有套接字连接的线程。

服务器向此套接字发送随机 int 数字(每 10 毫秒)。 问题是，一段时间后，接收数据出现巨大的滞后，并且 LogCat 打印大量“GC_CONCURRENT freed”消息。

public class TcpSocketThread extends Thread {
Context context;
String ip;
int port;

public TcpSocketThread(Context con, String ip, int port) {
    context = con;
    this.ip = ip;
    this.port = port;

}

@Override
public void run() {
    Socket client;

    try {

        client = new Socket(ip, port);
        BufferedReader in = new BufferedReader(new InputStreamReader(
                client.getInputStream()));


        String msg;
        while (true) {

            if (in.ready()) {
                msg = in.readLine();
                 Intent intent = new Intent(BLUETOOTH_DATA);
                 intent.putExtra(BLUETOOTH_DATA_STRING, msg);

                 context.sendBroadcast(intent);

                Log.v("Tcp-Socket-Thread", "msg: " + msg);
            }

        }

    } catch (UnknownHostException e) {
        Log.v("client", "unknown host" + e);

    } catch (IOException e) {
        Log.v("client", "No I/O" + e);
    }
}

}

Answer 1

You should not repeatedly poll ready() to test whether there is data to be read. Just call readLine(). It will block the thread until there is data to be read or the connection is closed.

对于读取 block 来说是一个很好的建议，但是每次处理数据时都会创建新的Intent，您可以重用这个对象吗？这就是导致 GC 变得疯狂的部分。

希望这对您有所帮助并祝您工作愉快。