Android通过SOCKET下载文件的方法

这篇文章主要介绍了Android通过SOCKET下载文件的方法,实例分析了Android使用Socket进行文件传输的技巧,需要的朋友可以参考下

本文实例讲述了Android通过SOCKET下载文件的方法。分享给大家供大家参考，具体如下：

服务端代码

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import java.io.BufferedInputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.ServerSocket; import java.net.Socket; import java.util.Scanner; public class FunctionServer {  private static int PORT = 2012;  private String path = "需要下载的文件所在路径";  public static void main(String[] args) throws IOException{   FunctionServer server = new FunctionServer();   server.start();  }  public void start() throws IOException{   ServerSocket ss = new ServerSocket(PORT);   while(true){    Socket s = ss.accept();    new Service(s).start();//创建线程   }  }  class Service extends Thread{   Socket s;   public Service(Socket s){    this.s = s;   }   public void run(){    try{     InputStream in = s.getInputStream();//得到输入流     Scanner sc = new Scanner(in);     OutputStream out = s.getOutputStream();     while(true){      String str = sc.nextLine();//读取文件名      if(!str.equals(null)){       System.out.println("你的文件名是"+str);       //根据路径和文件名获取文件       File f = new File(path+str);       FileInputStream fis = new FileInputStream(f);       DataInputStream dis = new DataInputStream(new BufferedInputStream(fis));       byte[] buffer = new byte[8192];       DataOutputStream ps = new DataOutputStream(out);       ps.writeLong((long) f.length());//发送文件大小       ps.flush();       while(true) {        int read = 0;        if(dis!=null){         read = fis.read(buffer);        }        if(read == -1){         break;        }        ps.write(buffer,0,read);       }       ps.flush();       dis.close();       s.close();       out.flush();       break;      }     }    }catch(IOException e){     e.printStackTrace();    }   }  } }

客户端代码，下载线程

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class DownloadThread extends Thread {   Socket socket;   InputStream in;   OutputStream out;   String path = "文件保存路径";   String functionName;   String serverIp = "服务器IP";   int socketPort = "服务端口号";   int fileSize,downLoadFileSize;   public DownloadThread(String functionName) {    this.functionName = functionName;   }   @Override   public void run() {    Looper.prepare();    while(!Thread.interrupted()){     try {      socket = new Socket(serverIp, socketPort);      InputStream in = socket.getInputStream();      OutputStream out = socket.getOutputStream();      out.write((functionName + "\n").getBytes("gbk"));      out.flush(); // 清理缓冲，确保发送到服务端      File f = new File(path + functionName);      OutputStream song = new FileOutputStream(f);      DataInputStream dis = new DataInputStream(        new BufferedInputStream(in));      DataOutputStream dos = new DataOutputStream(        new BufferedOutputStream(song));      fileSize = (int) dis.readLong() - 1;      System.out.println("开始下载");      byte[] buffer = new byte[8192];      while (true) {       int read = 0;       if (dis != null) {        read = dis.read(buffer);        downLoadFileSize += read;         }       if (read == -1) {        break;       }       dos.write(buffer, 0, read);      }      System.out.println("文件下载完成");      dos.close();     } catch (UnknownHostException e) {      // TODO Auto-generated catch block      e.printStackTrace();     } catch (IOException e) {      // TODO Auto-generated catch block      e.printStackTrace();     } finally {      this.interrupt();     }    }   }  }

基本可以直接用，根据自己需要稍微改动就OK了

希望本文所述对大家Android程序设计有所帮助。