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！