Android上传文件到Web服务器 PHP接收文件

android上传文件到服务器，通常采用构造http协议的方法，模拟网页post方法传输文件，服务器端可以采用javaservlet或者php来接收要传输的文件。使用javaservlet来接收文件的方法比较常见，在这里给大家介绍一个简单的服务器端使用php语言来接收文件的例子。
服务器端代码比较简单，接收传输过来的文件：

<?php 
$target_path = "./upload/";//接收文件目录 
$target_path = $target_path . basename( $_files['uploadedfile']['name']); 
if(move_uploaded_file($_files['uploadedfile']['tmp_name'], $target_path)) { 
  echo "the file ". basename( $_files['uploadedfile']['name']). " has been uploaded"; 
} else{ 
  echo "there was an error uploading the file, please try again!" . $_files['uploadedfile']['error']; 
} 
?> 

手机客户端代码：

package com.figo.uploadfile; 
 
import java.io.bufferedreader; 
import java.io.dataoutputstream; 
import java.io.fileinputstream; 
import java.io.inputstream; 
import java.io.inputstreamreader; 
import java.net.httpurlconnection; 
import java.net.url; 
import android.app.activity; 
import android.os.bundle; 
import android.view.view; 
import android.widget.button; 
import android.widget.textview; 
import android.widget.toast; 
 
public class uploadfileactivity extends activity 
{ 
 // 要上传的文件路径，理论上可以传输任何文件，实际使用时根据需要处理 
 private string uploadfile = "/sdcard/testimg.jpg"; 
 private string srcpath = "/sdcard/testimg.jpg"; 
 // 服务器上接收文件的处理页面，这里根据需要换成自己的 
 private string actionurl = "http://10.100.1.208/receive_file.php"; 
 private textview mtext1; 
 private textview mtext2; 
 private button mbutton; 
 
 @override 
 public void oncreate(bundle savedinstancestate) 
 { 
  super.oncreate(savedinstancestate); 
  setcontentview(r.layout.main); 
 
  mtext1 = (textview) findviewbyid(r.id.mytext2); 
  mtext1.settext("文件路径：\n" + uploadfile); 
  mtext2 = (textview) findviewbyid(r.id.mytext3); 
  mtext2.settext("上传网址：\n" + actionurl); 
  /* 设置mbutton的onclick事件处理 */ 
  mbutton = (button) findviewbyid(r.id.mybutton); 
  mbutton.setonclicklistener(new view.onclicklistener() 
  { 
   @override 
   public void onclick(view v) 
   { 
    uploadfile(actionurl); 
   } 
  }); 
 } 
 
 /* 上传文件至server，uploadurl：接收文件的处理页面 */ 
 private void uploadfile(string uploadurl) 
 { 
  string end = "\r\n"; 
  string twohyphens = "--"; 
  string boundary = "******"; 
  try 
  { 
   url url = new url(uploadurl); 
   httpurlconnection httpurlconnection = (httpurlconnection) url 
     .openconnection(); 
   // 设置每次传输的流大小，可以有效防止手机因为内存不足崩溃 
   // 此方法用于在预先不知道内容长度时启用没有进行内部缓冲的 http 请求正文的流。 
   httpurlconnection.setchunkedstreamingmode(128 * 1024);// 128k 
   // 允许输入输出流 
   httpurlconnection.setdoinput(true); 
   httpurlconnection.setdooutput(true); 
   httpurlconnection.setusecaches(false); 
   // 使用post方法 
   httpurlconnection.setrequestmethod("post"); 
   httpurlconnection.setrequestproperty("connection", "keep-alive"); 
   httpurlconnection.setrequestproperty("charset", "utf-8"); 
   httpurlconnection.setrequestproperty("content-type", 
     "multipart/form-data;boundary=" + boundary); 
 
   dataoutputstream dos = new dataoutputstream( 
     httpurlconnection.getoutputstream()); 
   dos.writebytes(twohyphens + boundary + end); 
   dos.writebytes("content-disposition: form-data; name=\"uploadedfile\"; filename=\"" 
     + srcpath.substring(srcpath.lastindexof("/") + 1) 
     + "\"" 
     + end); 
   dos.writebytes(end); 
 
   fileinputstream fis = new fileinputstream(srcpath); 
   byte[] buffer = new byte[8192]; // 8k 
   int count = 0; 
   // 读取文件 
   while ((count = fis.read(buffer)) != -1) 
   { 
    dos.write(buffer, 0, count); 
   } 
   fis.close(); 
 
   dos.writebytes(end); 
   dos.writebytes(twohyphens + boundary + twohyphens + end); 
   dos.flush(); 
 
   inputstream is = httpurlconnection.getinputstream(); 
   inputstreamreader isr = new inputstreamreader(is, "utf-8"); 
   bufferedreader br = new bufferedreader(isr); 
   string result = br.readline(); 
 
   toast.maketext(this, result, toast.length_long).show(); 
   dos.close(); 
   is.close(); 
 
  } catch (exception e) 
  { 
   e.printstacktrace(); 
   settitle(e.getmessage()); 
  } 
 } 
} 

在androidmanifest.xml文件里添加网络访问权限：
<uses-permission android:name="android.permission.internet" /> 

运行结果：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。