Android与PC通过USB连接通信（一）

原理

通过在Android设备与PC之间通过USB建立socket连接，以Android作为服务器，PC作为客户端，通过adb进行转发通信。

客户端代码及分析

package com.geo.main;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.InterruptedIOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import com.geo.util.FileHelper;
import com.geo.util.MyUtil;

/**
 * usb与pc通信，通过adb端口转发方式
 */
public class testPcClient
{

	public static void main(String[] args) throws InterruptedIOException
	{
		try
		{
			// adb 指令，在服务器开启后建立连接
			Runtime.getRuntime().exec("adb shell am broadcast -a NotifyServiceStop");
			Thread.sleep(3000);
			Runtime.getRuntime().exec("adb forward tcp:12580 tcp:10086"); // 端口转换
			Thread.sleep(3000);
			Runtime.getRuntime().exec("adb shell am broadcast -a NotifyServiceStart");
			Thread.sleep(3000);
		} catch (Exception e)
		{
			e.printStackTrace();

		}
		Socket socket = null;
		try
		{
			/*建立socket连接*/
			InetAddress serveraddr = null;
			serveraddr = InetAddress.getByName("127.0.0.1");
			System.out.println("TCP C: Connecting...");
			socket = new Socket(serveraddr, 12580);
			String str = "hi,chenhl";
			System.out.println("TCP C: RECEIVE");
			BufferedOutputStream out = new BufferedOutputStream(socket.getOutputStream());
			BufferedInputStream in = new BufferedInputStream(socket.getInputStream());
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			boolean flag = true;
			while (flag)
			{
				System.out.print("请输入file传递文件，退出输入exit：");
				String strWord = br.readLine();// 
				if (strWord.equals("file"))
				{
					/* 发送命令，out为发送给服务器的命令*/
					out.write("file".getBytes());
					out.flush();
					System.out.println("send file finish sending the CMD：");
					/* 服务器反馈准备接受，in为服务器的反馈 */
					String strFormsocket = readFromSocket(in);
					System.out.println("service ready receice data:UPDATE_CONTACTS:" + strFormsocket);
					byte[] filebytes = FileHelper.readFile("test1.txt");
					/*FileHelper为一个class，readFile将此处的test1.txt内容读取为byte[]格式
					test1.txt文件路径在FileHelper内设置
					*/
					System.out.println("fileszie = " + filebytes.length);
					/* MyUtil将整数转换为4字节byte数组 */
					byte[] filelength = new byte[4];
					filelength = MyUtil.intToByte(filebytes.length);
					byte[] fileformat = null;
					fileformat = ".png".getBytes();
					System.out.println("fileformat length=" + fileformat.length);
					/* 字节流中前4字节为文件长度，4字节文件格式，以后是文件流 */
					/* 注意如果write里的byte[]超过socket的缓存，系统会自动分包写过去，所以对方要循环写完 */

					/*一些文件属性的输出*/
					out.write(filelength);
					out.flush();
					String strok1 = readFromSocket(in);
					System.out.println("service receive filelength :" + strok1);
					System.out.println("write data to android");
					out.write(filebytes);
					out.flush();
					System.out.println("*********");

					/* 服务器反馈：接收成功 */
					String strread = readFromSocket(in);
					System.out.println(" send data success:" + strread);
					System.out.println("=============================================");
				} else if (strWord.equalsIgnoreCase("EXIT"))
				{
					out.write("EXIT".getBytes());
					out.flush();
					System.out.println("EXIT finish sending the data");
					String strFormsocket = readFromSocket(in);
					System.out.println("the data sent by server is:/r/n" + strFormsocket);
					flag = false;
					System.out.println("=============================================");
				}
			}

		} catch (UnknownHostException e1)
		{
			System.out.println("TCP ERROR1:" + e1.toString());
		} catch (Exception e2)
		{
			System.out.println("TCP ERROR2:" + e2.toString());
		} finally
		{
			try
			{
				if (socket != null)
				{
					socket.close();
					System.out.println("socket.close()");
				}
			} catch (IOException e)
			{
				System.out.println("TCP ERROR3:" + e.toString());
			}
		}
	}

	/* 从inputestream流中读数据*/
	public static String readFromSocket(InputStream in)
	{
		int MAX_BUFFER_BYTES = 4000;
		String msg = "";
		byte[] tempbuffer = new byte[MAX_BUFFER_BYTES];
		try
		{
			int numReadedBytes = in.read(tempbuffer, 0, tempbuffer.length);
			msg = new String(tempbuffer, 0, numReadedBytes, "utf-8");

			tempbuffer = null;
		} catch (Exception e)
		{
			e.printStackTrace();
		}
		return msg;
	}
}

分析及总结

此段代码为PC端的客户端代码，直接在PC端进行运行，在控制台输入指令，通过socket连接以adb指令的USB转发来传递数据，但是需要android设备首先开启服务端才能成功建立socket，全程需要将PC与android设备进行USB连接。

最后

以上就是孝顺面包为你收集整理的Android与PC通过USB连接通信（一）Android与PC通过USB连接通信（一）的全部内容，希望文章能够帮你解决Android与PC通过USB连接通信（一）Android与PC通过USB连接通信（一）所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。