Java 将套接字从Android发送到Python服务器

澄清：

import socket  

s = socket.socket()   
s.bind(("192.168.1.94", 60))  
s.listen(1)  #clients permitted connect
print "server run"

sc, addr = s.accept()  

while True:  
      recibido = sc.recv(1024)  
      if recibido == "quit":  
         break        
      print "received:", recibido  
      sc.send(recibido)  

print "bye"  

sc.close()  
s.close()  

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button = findViewById(R.id.idbtn);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Socket socket = new Socket("192.168.1.94",60);
                DataOutputStream DOS = new DataOutputStream(socket.getOutputStream());
                DOS.writeUTF("HELLO_WORLD");
                socket.close();
            }
        });
    }

2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008cdf
2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008824
2019-12-27 17:30:41.054 9255-9255/com.example.milchycompany.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.milchycompany.myapplication, PID: 9255
    android.os.NetworkOnMainThreadException
        at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:333)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:356)
        at java.net.Socket.connect(Socket.java:586)
        at java.net.Socket.connect(Socket.java:535)
        at java.net.Socket.<init>(Socket.java:427)
        at java.net.Socket.<init>(Socket.java:210)
        at com.example.milchycompany.myapplication.MainActivity$1.onClick(MainActivity.java:32)
        at android.view.View.performClick(View.java:5610)
        at android.view.View$PerformClick.run(View.java:22265)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6077)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

• 这两个设备连接到同一个本地网络

• IP地址是正确的

• 已经尝试使用不同的端口

• 已成功添加Android应用程序权限

• 图中显示，在虚拟机上运行的android应用程序也在真实设备上进行了测试

目的：我希望我的手机可以通过插座向电脑发送数据

服务器（Python）：

import socket  

s = socket.socket()   
s.bind(("192.168.1.94", 60))  
s.listen(1)  #clients permitted connect
print "server run"

sc, addr = s.accept()  

while True:  
      recibido = sc.recv(1024)  
      if recibido == "quit":  
         break        
      print "received:", recibido  
      sc.send(recibido)  

print "bye"  

sc.close()  
s.close()  

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button = findViewById(R.id.idbtn);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Socket socket = new Socket("192.168.1.94",60);
                DataOutputStream DOS = new DataOutputStream(socket.getOutputStream());
                DOS.writeUTF("HELLO_WORLD");
                socket.close();
            }
        });
    }

2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008cdf
2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008824
2019-12-27 17:30:41.054 9255-9255/com.example.milchycompany.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.milchycompany.myapplication, PID: 9255
    android.os.NetworkOnMainThreadException
        at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:333)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:356)
        at java.net.Socket.connect(Socket.java:586)
        at java.net.Socket.connect(Socket.java:535)
        at java.net.Socket.<init>(Socket.java:427)
        at java.net.Socket.<init>(Socket.java:210)
        at com.example.milchycompany.myapplication.MainActivity$1.onClick(MainActivity.java:32)
        at android.view.View.performClick(View.java:5610)
        at android.view.View$PerformClick.run(View.java:22265)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6077)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

Java（客户端）：

import socket  

s = socket.socket()   
s.bind(("192.168.1.94", 60))  
s.listen(1)  #clients permitted connect
print "server run"

sc, addr = s.accept()  

while True:  
      recibido = sc.recv(1024)  
      if recibido == "quit":  
         break        
      print "received:", recibido  
      sc.send(recibido)  

print "bye"  

sc.close()  
s.close()  

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button = findViewById(R.id.idbtn);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Socket socket = new Socket("192.168.1.94",60);
                DataOutputStream DOS = new DataOutputStream(socket.getOutputStream());
                DOS.writeUTF("HELLO_WORLD");
                socket.close();
            }
        });
    }

2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008cdf
2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008824
2019-12-27 17:30:41.054 9255-9255/com.example.milchycompany.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.milchycompany.myapplication, PID: 9255
    android.os.NetworkOnMainThreadException
        at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:333)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:356)
        at java.net.Socket.connect(Socket.java:586)
        at java.net.Socket.connect(Socket.java:535)
        at java.net.Socket.<init>(Socket.java:427)
        at java.net.Socket.<init>(Socket.java:210)
        at com.example.milchycompany.myapplication.MainActivity$1.onClick(MainActivity.java:32)
        at android.view.View.performClick(View.java:5610)
        at android.view.View$PerformClick.run(View.java:22265)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6077)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

错误消息：

import socket  

s = socket.socket()   
s.bind(("192.168.1.94", 60))  
s.listen(1)  #clients permitted connect
print "server run"

sc, addr = s.accept()  

while True:  
      recibido = sc.recv(1024)  
      if recibido == "quit":  
         break        
      print "received:", recibido  
      sc.send(recibido)  

print "bye"  

sc.close()  
s.close()  

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button = findViewById(R.id.idbtn);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Socket socket = new Socket("192.168.1.94",60);
                DataOutputStream DOS = new DataOutputStream(socket.getOutputStream());
                DOS.writeUTF("HELLO_WORLD");
                socket.close();
            }
        });
    }

2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008cdf
2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008824
2019-12-27 17:30:41.054 9255-9255/com.example.milchycompany.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.milchycompany.myapplication, PID: 9255
    android.os.NetworkOnMainThreadException
        at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:333)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:356)
        at java.net.Socket.connect(Socket.java:586)
        at java.net.Socket.connect(Socket.java:535)
        at java.net.Socket.<init>(Socket.java:427)
        at java.net.Socket.<init>(Socket.java:210)
        at com.example.milchycompany.myapplication.MainActivity$1.onClick(MainActivity.java:32)
        at android.view.View.performClick(View.java:5610)
        at android.view.View$PerformClick.run(View.java:22265)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6077)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglCodecCommon:glUtilsParamSize:未知参数0x00008cdf
2019-12-27 17:30:03.362 9255-9281/com.example.milchycompany.myapplication E/eglcodecommon:glUtilsParamSize:unknow参数0x00008824
2019-12-27 17:30:41.054 9255-9255/com.example.milchycompany.myapplication E/AndroidRuntime:致命异常：main
流程：com.example.milchycompany.myapplication，PID:9255
android.os.NetworkOnMainThreadException
在android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork上（StrictMode.java:1303）
位于java.net.AbstractPlainSocketImpl.doConnect（AbstractPlainSocketImpl.java:333）
位于java.net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:196）
位于java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java:178）
位于java.net.socksocketimpl.connect（socksocketimpl.java:356）
位于java.net.Socket.connect（Socket.java:586）
位于java.net.Socket.connect（Socket.java:535）
位于java.net.Socket（Socket.java:427）
位于java.net.Socket。（Socket.java:210）
位于com.example.milchycompany.myapplication.MainActivity$1.onClick（MainActivity.java:32）
在android.view.view.performClick（view.java:5610）中
在android.view.view$PerformClick.run（view.java:22265）
位于android.os.Handler.handleCallback（Handler.java:751）
位于android.os.Handler.dispatchMessage（Handler.java:95）
位于android.os.Looper.loop（Looper.java:154）
位于android.app.ActivityThread.main（ActivityThread.java:6077）
位于java.lang.reflect.Method.invoke（本机方法）
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:866）上
位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:756）

发生这种情况是因为您正在主线程上执行网络操作。 您应该始终在线程上或作为异步任务运行网络操作

请参见下面的示例

:

---

永远不要忘记将此权限添加到AndroidManifest.xml

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

查看错误：NetworkOnMainThreadException我只发送数据，不接收数据