从Android SD卡上传文件到网络服务器

问题描述：

everyone。我试图从手机上将图片文件上传到我的电脑上的Apache Web服务器，但没有成功。这里是我的代码：从Android SD卡上传文件到网络服务器

package com.testconnectivity; 

import java.io.DataInputStream; 
import java.io.DataOutputStream; 
import java.io.File; 
import java.io.FileInputStream; 
import java.net.HttpURLConnection; 
import java.net.URL; 

import android.app.Activity; 
import android.os.Bundle; 

public class MainActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     HttpURLConnection connection = null; 
     DataOutputStream outputStream = null; 
     DataInputStream inputStream = null; 

     String pathToOurFile = "/sdcard/Confused.jpg"; 
     String urlServer = "http://190.213.29.178/connectiontest1.php"; 
     String lineEnd = "\r\n"; 
     String twoHyphens = "--"; 
     String boundary = "*****"; 

     int bytesRead, bytesAvailable, bufferSize; 
     byte[] buffer; 
     int maxBufferSize = 1*1024*1024; 

     try 
     { 
     FileInputStream fileInputStream = new FileInputStream(new File(pathToOurFile)); 

     URL url = new URL(urlServer); 
     connection = (HttpURLConnection) url.openConnection(); 

     // Allow Inputs & Outputs 
     connection.setDoInput(true); 
     connection.setDoOutput(true); 
     connection.setUseCaches(false); 

     // Enable POST method 
     connection.setRequestMethod("POST"); 

     connection.setRequestProperty("Connection", "Keep-Alive"); 
     connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary); 

     outputStream = new DataOutputStream(connection.getOutputStream()); 
     outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
     outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + pathToOurFile +"\"" + lineEnd); 
     outputStream.writeBytes(lineEnd); 

     bytesAvailable = fileInputStream.available(); 
     bufferSize = Math.min(bytesAvailable, maxBufferSize); 
     buffer = new byte[bufferSize]; 

     // Read file 
     bytesRead = fileInputStream.read(buffer, 0, bufferSize); 

     while (bytesRead > 0) 
     { 
     outputStream.write(buffer, 0, bufferSize); 
     bytesAvailable = fileInputStream.available(); 
     bufferSize = Math.min(bytesAvailable, maxBufferSize); 
     bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
     } 

     outputStream.writeBytes(lineEnd); 
     outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 

     // Responses from the server (code and message) 
     int serverResponseCode = connection.getResponseCode(); 
     String serverResponseMessage = connection.getResponseMessage(); 

     fileInputStream.close(); 
     outputStream.flush(); 
     outputStream.close(); 
     } 
     catch (Exception ex) 
     { 
     //Exception handling 
     Log.d("MainActivity", "Print " + ex.toString()); 

     } 

    } 
}

// connectiontest1.php

<?php 
$target_path = "./"; 
$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!"; 
} 
?>

可能有人请告诉我出了什么问题？我是否需要Web服务或者是否有其他问题？任何帮助将非常感激。

对不起，试图上传我的php代码下的评论连接测试，但它没有工作。 – 2011-03-24 19:14:44

你会得到什么错误（在java端）？ – MByD 2011-03-24 19:41:01

@MByD - 编译器或控制台没有注册错误。有关问题可能出在哪里的任何建议？ – 2011-03-24 20:33:33

答

你有android.os.NetworkOnMainThreadException吗？
您应该尝试使用AsyncTask。这对我有效。
检查：How to fix android.os.NetworkOnMainThreadException?

作为一般性建议，最好解释为什么这些东西连接起来，为什么使用AsyncTask可以解决这个问题。还有如何确认这是问题，原始海报应该在哪个方面看这个错误。 – EdC 2012-09-15 02:54:59

答

下面这样的代码：

//启用POST方法 connection.setRequestMethod（ “POST”）;

connection.setRequestProperty("Connection", "Keep-Alive"); 
    connection.setRequestProperty("Content-Type", "multipart/form data;boundary="+boundary);

添加下列行：

connection.setRequestProperty（ “UploadedFile的”，pathToOurFile）;

从Android SD卡上传文件到网络服务器

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