Android网络编程只局域网传输文件

Android网络编程之局域网传输文件：

首先创建一个socket管理类，该类是传输文件的核心类，主要用来发送文件和接收文件

具体代码如下：

 package com.jiao.filesend;

 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.net.ServerSocket;
 import java.net.Socket;

 import android.os.Environment;

 /**
  * Socket管理类
  * 1、接收文件
  * 2、发送文件
  * @author jiaocg
  *
  */
 public class SocketManager {
     private ServerSocket server;
     public SocketManager(ServerSocket server){
         this.server = server;
     }
     //接收文件
     public String ReceiveFile(){
         try{
             //接收文件名
             Socket name = server.accept();
             //获取数据的输入流
             InputStream nameStream = name.getInputStream();
             //字符流转换为字节流
             InputStreamReader streamReader = new InputStreamReader(nameStream);
             BufferedReader br = new BufferedReader(streamReader);
             //接收到文件名
             String fileName = br.readLine();
             br.close();
             streamReader.close();
             nameStream.close();
             name.close();
             //接收文件数据
             Socket data = server.accept();
             InputStream dataStream = data.getInputStream();
             String savePath = Environment.getExternalStorageDirectory().getPath() + "/" + fileName;
             FileOutputStream file = new FileOutputStream(savePath, false);
             byte[] buffer = new byte[1024];
             int size = -1;
             while ((size = dataStream.read(buffer)) != -1){
                 file.write(buffer, 0 ,size);
             }
             file.close();
             dataStream.close();
             data.close();
             return fileName + "---接收完成"+"---保存至："+savePath;
         }catch(Exception e){
             System.out.println(e.toString());
             return "接收错误:\n" + e.getMessage();
         }
     }

     //发送文件
     public String SendFile(String fileName, String path, String ipAddress, int port){
         try {
             //发送文件名
             //首先发送文件名
             Socket name = new Socket(ipAddress, port);
             //创建输出流
             OutputStream outputName = name.getOutputStream();
             //字符流转换为字节流
             OutputStreamWriter outputWriter = new OutputStreamWriter(outputName);
             //缓冲区
             BufferedWriter bwName = new BufferedWriter(outputWriter);
             //写到缓冲区
             bwName.write(fileName);
             bwName.close();
             outputWriter.close();
             outputName.close();
             name.close();

             //发送文件数据
             Socket data = new Socket(ipAddress, port);
             //创建输出流
             OutputStream outputData = data.getOutputStream();
             //从文件系统中的某个文件中获得输入字节
             FileInputStream fileInput = new FileInputStream(path);
             int size = -1;
             byte[] buffer = new byte[1024];
             while((size = fileInput.read(buffer, 0, 1024)) != -1){
                 outputData.write(buffer, 0, size);
             }
             outputData.close();
             fileInput.close();
             data.close();
             return fileName + " 发送完成";
         } catch (Exception e) {
             return "发送错误:\n" + e.getMessage();
         }
     }
 }

我们可以利用上述的文件传输类，来实现局域网中的文件传输

具体使用代码如下：

 // 1、文件名 2、文件路径 3、目标ip 4、目标端口
 String response = socketManager.SendFile(fileName, filePath,ip, POST);
 Message.obtain(handler, 0, response).sendToTarget();

调用以上代码就可以实现局域网中的文件传输；

注意：以上文件传输属于网络传送，记得在子线程中执行哦，否则要报错！