Question

我正在编写一个程序，用于从Android应用程序向Python服务器发送String对象（最终是图像，但从小处开始）。

我的python服务器现在很小，它只是侦听然后打印接收到的内容。

import socket
import sys
print("---------------------------------------------")
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_addy = ("localhost", 5589)
print("starting up on %s with port %s" % server_addy)
socket.bind(server_addy)
socket.listen(1)
while True:
    print("Waiting on connection...")
    print("---------------------------------------------")
    connection, client_addy = socket.accept()
    print("Connection Accepted")
try:
    print("Connection received from...", client_addy)
    while True:
        data = connection.recv(1024)
        print("Received \" %s \" from connection" % data)
        connection.close()
        break
finally:
    print("Closing Connection to ", client_addy)
    connection.close()

我已经用另一个能够连接到该服务器并从该服务器发送/接收数据的python客户端对此进行了测试。所以在我的Android应用程序方面

public class score_verify extends AppCompatActivity {

private String input_score;
private Pattern pattern = Pattern.compile("[0-9]+");
private Socket socket;
private String url = "localhost";
private String metadata;
private int port = 5589;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_score_verify);
    Button submit = (Button) findViewById(R.id.submit);
    final EditText score = (EditText) findViewById(R.id.input);
    final CheckBox box = (CheckBox) findViewById(R.id.verify);
    metadata = getIntent().getStringExtra("metadata");
    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            input_score = score.getText().toString();
            if(!pattern.matcher(input_score).matches()) {
                Toast.makeText(score_verify.this, "Please Enter A Valid Score", Toast.LENGTH_LONG).show();
            }
            else if(!box.isChecked()) {
                Toast.makeText(score_verify.this, "Please Verify that the Information is Correct", Toast.LENGTH_LONG).show();
            }
            else {
                try {
                    metadata += ("," + input_score);
                    metadataTask task = new metadataTask();
                    task.execute();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    });
}

实际连接代码为

private class metadataTask extends AsyncTask<Void, Void, Void> {
    PrintWriter printWriter;
    @Override
    protected Void doInBackground(Void...params) {
        try {
            socket = new Socket(url, 5589);
            printWriter = new PrintWriter(socket.getOutputStream());
            printWriter.write("Connecting!...");
            printWriter.flush();
            printWriter.close();
            socket.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

}

对于具有URL的第一部分，我尝试使用“ 127.0.0.1”，“ localhost”和“ 10.0.2.2”对其进行尝试，但得到连接超时或连接拒绝错误（使用localhost）

我有

  <uses-permission android:name="android.permission.INTERNET"/>
  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

在我的清单中也是如此任何帮助都将不胜感激，我已经快要诊断这个问题了

Ping结果：

Pinging 192.168.1.89 with 32 bytes of data:
Reply from 192.168.1.232: Destination host unreachable.
Reply from 192.168.1.89: bytes=32 time=49ms TTL=64
Reply from 192.168.1.89: bytes=32 time=130ms TTL=64
Reply from 192.168.1.89: bytes=32 time=37ms TTL=64

Ping statistics for 192.168.1.89:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 37ms, Maximum = 130ms, Average = 72ms

Answer 1

您的python代码似乎在while循环中永远持续接受连接，这阻止了它进入try块。还将server_addy中的地址参数更改为server_addy = ('', "port") 为您提供以下代码

import socket
import sys
print("---------------------------------------------")
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_addy = ('', 5600)
print("starting up on %s with port %s" % server_addy)
socket.bind(server_addy)
socket.listen(1)
while True:
    print("Waiting on connection...")
    print("---------------------------------------------")
    connection, client_addy = socket.accept()
    print("Connection Accepted")
    try:
       print("Connection received from...", client_addy)
       while True:
                 data = connection.recv(1024)
                 print("Received \" %s \" from connection" % data)
                 connection.close()
                 break
    finally:
           print("Closing Connection to ", client_addy)
           connection.close()

这一次将服务于单个客户端连接，并且在关闭连接后它将接受下一个连接。并在android部分使用两个地址之一进行连接：

您的专用IP地址（192.168.0.0）
或者10.0.2.2

将Android应用程序连接到Python服务器

1 个答案: