C# 读取从PC接收到的安卓手机数据
我需要实现一个解决方案,从通过USB电缆连接到PC的android设备读取数据。i、 e.连接到PC的手机将通过另一个android设备通过C# 读取从PC接收到的安卓手机数据,c#,android,usb,nfc,C#,Android,Usb,Nfc,我需要实现一个解决方案,从通过USB电缆连接到PC的android设备读取数据。i、 e.连接到PC的手机将通过另一个android设备通过NFC接收数据,其中PC-C程序必须读取插入式android手机接收到的数据,如下所示 [PC]<----(2. read data) usb cable----[android phone]<-----NFC (1. transmit string)-----[android phone] [PC]我认为这是你应该做的。当收到来自NFC的数据
NFC
接收数据,其中PC-C
程序必须读取插入式android手机接收到的数据,如下所示
[PC]<----(2. read data) usb cable----[android phone]<-----NFC (1. transmit string)-----[android phone]
[PC]我认为这是你应该做的。当收到来自NFC的数据时,将其存储在SD卡中预定义的位置。同时,运行一个连续的线程来为该特定文件执行adb拉取。如果adb pull下载了文件,那么您就完成了 另一种方法是监视logcat输出:您的应用程序可以向logcat输出写入一条消息,该输出通过您的应用程序进行监视
上的示例代码和其他讨论
但@Sagar所提到的似乎也是合理的,如果做得好,可以防止任何数据丢失。使用logcat方法,如果断开连接,则断开连接期间传输的任何数据都将丢失 您可以只设置一个端口,然后在预定义端口上向目标PC的IP地址发出HTTP请求。您需要提前配置Android应用程序,将请求发送到特定的IP地址或扫描一系列IP地址以查找正确的IP地址(在这种情况下,您的侦听器需要响应“搜索”类型的请求)
实际上,您正在C#中创建一个小型REST服务。那你就可以了。首先,我不是C#程序员,所以请原谅我从中复制粘贴C#socket客户端
基本上,如果您想通过USB与Android应用程序通信,您需要指示手机通过adb
(Android调试桥)创建端口转发,然后您可以使用普通TCP/IP套接字与客户端建立流通信
因此,首先,您必须在PC上安装正确的驱动程序(您可以在制造商网站上找到它们),以便在运行adb设备时正确识别您的手机:
C:\adt-bundle-windows-x86-20140321\sdk\platform-tools>adb devices
List of devices attached
039d78fa2518e606 device
接下来,您需要在Android端设置端口转发,以便将PC上本地主机的套接字连接正确转发到手机上的本地主机。这也可以通过亚洲开发银行进行:
C:\adt-bundle-windows-x86-20140321\sdk\platform-tools>adb forward tcp:6000 tcp:6000
验证它是否成功:
C:\adt-bundle-windows-x86-20140321\sdk\platform-tools>adb forward --list
039d78fa2518e606 tcp:6000 tcp:6000
现在,您可以在Android端创建一个常规套接字服务器应用程序。很抱歉,这个示例非常简单(我很晚才注意到这个问题,没有时间实现正确的通信协议)。但这应该向您展示如何在客户端和主机之间传输字符串,并且您可以实现必要的循环,或者在需要时实现更复杂的传输协议
基本上,这只是默认的Android项目,添加了一个类,在一个单独的线程中运行(GUI和网络活动不能在同一个线程中运行)
因此,我们的MainActivity.java如下所示:
package com.example.dataexchange;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
public class MainActivity extends ActionBarActivity {
SocketHandler server;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.v("jlumme", "Main/ start network task");
new Thread(new Runnable() {
public void run() {
server = new SocketHandler(6000);
server.run();
}
}).start();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
package com.example.dataexchange;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import android.util.Log;
public class SocketHandler implements Runnable {
private Socket socket;
private ServerSocket server;
private PrintWriter out;
private BufferedReader in;
private int socketPort;
SocketHandler(int port) {
socketPort = port;
}
@Override
public void run() {
Log.v("jlumme", "Socket thread has started");
String inputText;
// TODO Auto-generated method stub
try {
Log.v("jlumme", "Starting socket server ");
server = new ServerSocket(6000);
socket = server.accept();
Log.v("jlumme", "Client connected");
out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while ((inputText = in.readLine()) != null) {
Log.v("jlumme", "Received:" + inputText);
out.println("you wrote:" + inputText);
}
Log.v("jlumme", "connection established");
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
通常,我们只是在一个单独的线程中启动我们的SocketHandler
类。SocketThread类如下所示:
package com.example.dataexchange;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
public class MainActivity extends ActionBarActivity {
SocketHandler server;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.v("jlumme", "Main/ start network task");
new Thread(new Runnable() {
public void run() {
server = new SocketHandler(6000);
server.run();
}
}).start();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
package com.example.dataexchange;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import android.util.Log;
public class SocketHandler implements Runnable {
private Socket socket;
private ServerSocket server;
private PrintWriter out;
private BufferedReader in;
private int socketPort;
SocketHandler(int port) {
socketPort = port;
}
@Override
public void run() {
Log.v("jlumme", "Socket thread has started");
String inputText;
// TODO Auto-generated method stub
try {
Log.v("jlumme", "Starting socket server ");
server = new ServerSocket(6000);
socket = server.accept();
Log.v("jlumme", "Client connected");
out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while ((inputText = in.readLine()) != null) {
Log.v("jlumme", "Received:" + inputText);
out.println("you wrote:" + inputText);
}
Log.v("jlumme", "connection established");
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
基本上,在run()
方法中,您启动一个新的SocketServer
,并开始等待客户端。一旦客户端连接,您将双向设置流缓冲区,并开始等待消息(任何以换行符结尾的内容,'\n'
都可以)
在C#端,应用程序非常简单。它连接到localhost
端口6000
,并发送一行:
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
public class SynchronousSocketClient
{
public static void StartClient() {
// Data buffer for incoming data.
byte[] bytes = new byte[1024];
// Connect to a remote device.
try {
IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 6000);
// Create a TCP/IP socket.
Socket sender = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp );
// Connect the socket to the remote endpoint. Catch any errors.
try {
sender.Connect(remoteEP);
Console.WriteLine("Socket connected to {0}",
sender.RemoteEndPoint.ToString());
// Encode the data string into a byte array.
byte[] msg = Encoding.ASCII.GetBytes("This is a test\n");
// Send the data through the socket.
int bytesSent = sender.Send(msg);
// Receive the response from the remote device.
int bytesRec = sender.Receive(bytes);
Console.WriteLine("Echoed test = {0}",
Encoding.ASCII.GetString(bytes,0,bytesRec));
// Release the socket.
sender.Shutdown(SocketShutdown.Both);
sender.Close();
} catch (ArgumentNullException ane) {
Console.WriteLine("ArgumentNullException : {0}",ane.ToString());
} catch (SocketException se) {
Console.WriteLine("SocketException : {0}",se.ToString());
} catch (Exception e) {
Console.WriteLine("Unexpected exception : {0}", e.ToString());
}
} catch (Exception e) {
Console.WriteLine( e.ToString());
}
}
public static int Main(String[] args)
{
StartClient();
return 0;
}
}
如果在执行C#程序时,它将向客户端发送这是一个测试字符串,客户端将回显该字符串:
c:\Visual Studio 2013\Projects\ConsoleApplication2\ConsoleApplication2\bin\Debug>ConsoleApplication2.exe
Socket connected to 127.0.0.1:6000
Echoed test = you wrote:This is a test
我想在bounty关闭前到达截止日期,因此目前没有适当的消息处理,c#将立即退出(而Android端将对此感到困惑),对此我深表歉意。但我认为,一旦您运行了这个示例,您就可以轻松地将其扩展到您的需要,并实现必要的逻辑来处理终止和其他内容
希望能有所帮助在我看来,这与NFC或第三种设备没有多大关系。你需要在你的电脑上安装一个程序,用USB线从安卓设备上读取数据。或者你想让Android设备向PC发送数据?@greenapps谢谢你的回复,先生。。是的,这就是我的目标。C#
应该轮询连接的安卓设备收到的NFC消息,或者连接的安卓设备在收到NFC消息后应该向C#程序发送数据
有可能吗?你知道怎么做吗?为什么要用USB线连接?@greenapps我想C#应用程序用这种方式检索数据会更容易。还有其他可能/简单的方法吗?最简单的方法是wifi。只有服务器/客户端。如果你说C#应该检索数据,那么android上的数据存储/处理在哪里?