将套接字连接到设备上的本地地址

Question

我现在要考虑这个问题一段时间了。我通过接收端的套接字将数据从设备发送到设备，我必须将数据从套接字发送到设备本身。localhost/127.0.0.1/10.0.0.2或WiFi地址不工作

如何从套接字发送数据到设备上的localhost:port ?

try
{
    Socket socket = new Socket(InetAddress.getLocalHost(), 1500);
    InputStream is = s.getInputStream();
    OutputStream os = socket.getOutputStream();
    int bufferSize = 1024;
    byte[] buffer = new byte[bufferSize];
    int len = 0;
    while ((len = is.read(buffer)) > 0)
    {
        if(is.available() > 1024){
            os.write(buffer);
        Log.i(TAG, "localSocket writing: " + buffer.length);
        }

        try
        {
            Thread.sleep(100);
        }
        catch (InterruptedException e)
        {
            Log.e(TAG, "LocalSocketThread" + e.toString());
        }
    }
}

and my manifest permissions:

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

Answer 1

尝试发送null到地址字段:

Socket socket = new Socket(null, 1500);

Answer 2

看到您的代码，正如它写的那样，没有任何意义，您从套接字读取并立即测试available()。你只是从它读取，所以很可能它会返回0。

while ((len = is.read(buffer)) > 0)
{
   // this is what makes no sense
   if (is.available() > 1024) os.write(buffer);
   // what you probably want to do is
   //  Even this test is not necessary because you already test in the while loop
   if (len > 0) 
   {
      os.write(buffer, 0, len);
      Log.i(TAG, "localSocket writing: " + len);
   }