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); 
   
  mButton = (Button) findViewById(R.id.myButton); 
  mButton.setOnClickListener(new View.OnClickListener() 
  { 
   @Override 
   public void onClick(View v) 
   { 
    uploadFile(actionUrl); 
   } 
  }); 
 } 
  
 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：

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