Android学习之客户端上传图片到服务器

根据项目需求，需要上传相册和拍照的图片，参考和借鉴了别人的资料和代码，简单地功能实现了。

一、 HTTP   multipart/form-data—— 上传报文格式

我们来了解下Android客户端如何通过HTTP协议来将图片上传到服务器。我们先来了解下 HTTP   multipart/form-data， 上传报文格式 。

假设接收文件的网页程序是http://172.31.8.6:8080/fileUpload/file_upload。假设我们要发送一个图片文件，文件名为“iamge.jpg”。

首先，客户端成功链接172.31.8.6后，会发送如下的HTTP请求：

      POST/http://172.31.8.6:8080/fileUpload/file_upload HTTP/1.1 
　　Accept: text/plain, */* 
　　Accept-Language: zh-cn 
　　Host: 172.31.8.6
　　Content-Type:multipart/form-data;boundary=-----------------------------7db372eb000e2
　　User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
　　Content-Length: 3693
　　Connection: Keep-Alive
　　-------------------------------7db372eb000e2
　　Content-Disposition: form-data; name="img"; filename="image.jpg"
　　Content-Type: image/jpeg
　　(此处省略jpeg文件二进制数据...）
　　-------------------------------7db372eb000e2--

此内容必须一字不差，包括最后的回车，红色字体部分就是协议的头。给服务器上传数据时，并非协议头每个字段都得说明，其中，content-type是必须的，它包括一个类似标志性质的名为boundary的标志，它可以是随便输入的字符串。对后面的具体内容也是必须的。它用来分辨一段内容的开始。Content-Length: 3693 ，这里的3693是要上传文件的总长度。绿色字体部分就是需要上传的数据，可以是文本，也可以是图片等。数据内容前面需要有Content-Disposition, Content-Type以及Content-Transfer-Encoding等说明字段。最后的紫色部分就是协议的结尾了。

注意这一行：

　　 Content-Type: multipart/form-data; boundary=---------------------------7db372eb000e2　　

　　根据 rfc1867, multipart/form-data是必须的. 

　　---------------------------7db372eb000e2 是分隔符，分隔多个文件、表单项。其中b372eb000e2 是即时生成的一个数字，用以确保整个分隔符不会在文件或表单项的内容中出现。Form每个部分用分隔符分割，分隔符之前必须加上"--"着两个字符(即--{boundary})才能被http协议认为是Form的分隔符，表示结束的话用在正确的分隔符后面添加"--"表示结束。

　　前面的 ---------------------------7d 是 IE 特有的标志,Mozila 为---------------------------71. 

　　每个分隔的数据的都可以用Content-Type来表示下面数据的类型，可以参考rfc1341( http://www.ietf.org/rfc/rfc1341.txt)

　　例如 ：Contect-Type:image/jpeg 表示下面的数据是jpeg文件数据。

二、客户端源码

MainActivity.java

package com.fg.activity;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.fg.util.UploadUtil;
import com.fg.util.UploadUtil.OnUploadProcessListener;

/**
 * @author ICQwlj

 * Email :[email protected]

 * 说明：主要用于选择文件和上传文件操作
 */
public class MainActivity extends Activity implements OnClickListener,OnUploadProcessListener{
	private static final String TAG = "uploadImage";
	
	/**
	 * 去上传文件
	 */
	protected static final int TO_UPLOAD_FILE = 1;  
	/**
	 * 上传文件响应
	 */
	protected static final int UPLOAD_FILE_DONE = 2;  //
	/**
	 * 选择文件
	 */
	public static final int TO_SELECT_PHOTO = 3;
	/**
	 * 上传初始化
	 */
	private static final int UPLOAD_INIT_PROCESS = 4;
	/**
	 * 上传中
	 */
	private static final int UPLOAD_IN_PROCESS = 5;
	/***
	 * 这里的这个URL是我服务器的javaEE环境URL
	 */
	private static String requestURL = "http://172.31.8.6:8080/fileUpload/file_upload";
	private Button selectButton,uploadButton;
	private ImageView imageView;
	private TextView uploadImageResult;
	
	private String picPath = null;
	private ProgressDialog progressDialog;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initView();
    }
    
    /**
     * 初始化数据
     */
	private void initView() {
        selectButton = (Button) this.findViewById(R.id.selectImage);
        uploadButton = (Button) this.findViewById(R.id.uploadImage);
        selectButton.setOnClickListener(this);
        uploadButton.setOnClickListener(this);
        imageView = (ImageView) this.findViewById(R.id.imageView);
		uploadImageResult = (TextView) findViewById(R.id.uploadImageResult);
        progressDialog = new ProgressDialog(this);        
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.selectImage:
			Intent intent = new Intent(this,SelectPicActivity.class);
			startActivityForResult(intent, TO_SELECT_PHOTO);
			break;
		case R.id.uploadImage:
			if(picPath!=null)
			{
				handler.sendEmptyMessage(TO_UPLOAD_FILE);
			}else{
				Toast.makeText(this, "上传的文件路径出错", Toast.LENGTH_LONG).show();
			}
			break;
		default:
			break;
		}
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(resultCode==Activity.RESULT_OK && requestCode == TO_SELECT_PHOTO)
		{
			picPath = data.getStringExtra(SelectPicActivity.KEY_PHOTO_PATH);
			Log.i(TAG, "最终选择的图片="+picPath);
			Bitmap bm = BitmapFactory.decodeFile(picPath);
			imageView.setImageBitmap(bm);

			//更新图库
			Uri localUri = Uri.fromFile(new File(picPath));
			    Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);
			    sendBroadcast(localIntent);	
		}
		super.onActivityResult(requestCode, resultCode, data);
	}
	

	/**
	 * 上传服务器响应回调
	 */
	@Override
	public void onUploadDone(int responseCode, String message) {
		progressDialog.dismiss();
		Message msg = Message.obtain();
		msg.what = UPLOAD_FILE_DONE;
		msg.arg1 = responseCode;
		msg.obj = message;
		handler.sendMessage(msg);
	}
	
	private void toUploadFile()
	{
		uploadImageResult.setText("正在上传中...");
		progressDialog.setMessage("正在上传文件...");
		progressDialog.show();
		String fileKey = "img";
		UploadUtil uploadUtil = UploadUtil.getInstance();
		uploadUtil.setOnUploadProcessListener(this);  //设置监听器监听上传状态
		
		Map<String, String> params = new HashMap<String, String>();
		params.put("orderId", "11111");
		uploadUtil.uploadFile( picPath,fileKey, requestURL,params);
	}	

	@Override
	public void onUploadProcess(int uploadSize) {
		Message msg = Message.obtain();
		msg.what = UPLOAD_IN_PROCESS;
		msg.arg1 = uploadSize;
		handler.sendMessage(msg);
	}

	@Override
	public void initUpload(int fileSize) {
		Message msg = Message.obtain();
		msg.what = UPLOAD_INIT_PROCESS;
		msg.arg1 = fileSize;
		handler.sendMessage(msg );
	}
		
	private Handler handler = new Handler(){
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case TO_UPLOAD_FILE:
				toUploadFile();
				break;			
			case UPLOAD_INIT_PROCESS:				
				break;				
			case UPLOAD_IN_PROCESS:				
				break;				
			case UPLOAD_FILE_DONE:
				String result = "响应码："+msg.arg1+"\n响应信息："+msg.obj+"\n耗时："+UploadUtil.getRequestTime()+"秒";
				uploadImageResult.setText(result);
				break;				
			default:
				break;
			}
			super.handleMessage(msg);
		}		
	};
}

SelectPicActivity.java

package com.fg.activity;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

/**
 * @author ICQwlj

 * Email :[email protected]

 * 说明：主要用于选择文件操作
 */

public class SelectPicActivity extends Activity implements OnClickListener{

	/***
	 * 使用照相机拍照获取图片
	 */
	public static final int SELECT_PIC_BY_TACK_PHOTO = 1;
	/***
	 * 使用相册中的图片
	 */
	public static final int SELECT_PIC_BY_PICK_PHOTO = 2;
	
	/***
	 * 从Intent获取图片路径的KEY
	 */
	public static final String KEY_PHOTO_PATH = "photo_path";
	
	private static final String TAG = "SelectPicActivity";
	
	private LinearLayout dialogLayout;
	private Button takePhotoBtn,pickPhotoBtn,cancelBtn;

	/**获取到的图片路径*/
	private String picPath;
	
	private Intent lastIntent ;
	
	private Uri photoUri;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.select_pic_layout);
		initView();
	}
	/**
	 * 初始化加载View
	 */
	private void initView() {
		dialogLayout = (LinearLayout) findViewById(R.id.dialog_layout);
		dialogLayout.setOnClickListener(this);
		takePhotoBtn = (Button) findViewById(R.id.btn_take_photo);
		takePhotoBtn.setOnClickListener(this);
		pickPhotoBtn = (Button) findViewById(R.id.btn_pick_photo);
		pickPhotoBtn.setOnClickListener(this);
		cancelBtn = (Button) findViewById(R.id.btn_cancel);
		cancelBtn.setOnClickListener(this);
		
		lastIntent = getIntent();
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.dialog_layout:
			finish();
			break;
		case R.id.btn_take_photo:
			takePhoto();
			break;
		case R.id.btn_pick_photo:
			pickPhoto();
			break;
		default:
			finish();
			break;
		}
	}

	/**
	 * 拍照获取图片
	 */
	private void takePhoto() {
		//执行拍照前，应该先判断SD卡是否存在
		String SDState = Environment.getExternalStorageState();
		if(SDState.equals(Environment.MEDIA_MOUNTED))
		{
			
			Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//"android.media.action.IMAGE_CAPTURE"
			/***
			 * 需要说明一下，以下操作使用照相机拍照，拍照后的图片会存放在相册中的
			 * 这里使用的这种方式有一个好处就是获取的图片是拍照后的原图
			 * 如果不实用ContentValues存放照片路径的话，拍照后获取的图片为缩略图不清晰
			 */
			ContentValues values = new ContentValues();  
			photoUri = this.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);  
			intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri);
			/**-----------------*/
			startActivityForResult(intent, SELECT_PIC_BY_TACK_PHOTO);
		}else{
			Toast.makeText(this,"内存卡不存在", Toast.LENGTH_LONG).show();
		}
	}

	/***
	 * 从相册中取图片
	 */
	private void pickPhoto() {
		Intent intent = new Intent();
		intent.setType("image/*");
		intent.setAction(Intent.ACTION_GET_CONTENT);
		startActivityForResult(intent, SELECT_PIC_BY_PICK_PHOTO);
	}
	
	@Override
	public boolean onTouchEvent(MotionEvent event) {
		finish();
		return super.onTouchEvent(event);
	}
	
	
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(resultCode == Activity.RESULT_OK)
		{
			doPhoto(requestCode,data);
		}
		super.onActivityResult(requestCode, resultCode, data);
	}
	
	/**
	 * 选择图片后，获取图片的路径
	 * @param requestCode
	 * @param data
	 */
	private void doPhoto(int requestCode,Intent data)
	{
		if(requestCode == SELECT_PIC_BY_PICK_PHOTO )  //从相册取图片，有些手机有异常情况，请注意
		{
			if(data == null)
			{
				Toast.makeText(this, "选择图片文件出错", Toast.LENGTH_LONG).show();
				return;
			}
			photoUri = data.getData();
			if(photoUri == null )
			{
				Toast.makeText(this, "选择图片文件出错", Toast.LENGTH_LONG).show();
				return;
			}
		}
		String[] pojo = {MediaStore.Images.Media.DATA};
		Cursor cursor = managedQuery(photoUri, pojo, null, null,null);   
		if(cursor != null )
		{
			int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]);
			cursor.moveToFirst();
			picPath = cursor.getString(columnIndex);
			cursor.close();
		}
		Log.i(TAG, "imagePath = "+picPath);
		if(picPath != null && ( picPath.endsWith(".png") || picPath.endsWith(".PNG") ||picPath.endsWith(".jpg") ||picPath.endsWith(".JPG")  ))
		{
			lastIntent.putExtra(KEY_PHOTO_PATH, picPath);
			setResult(Activity.RESULT_OK, lastIntent);
			finish();
		}else{
			Toast.makeText(this, "选择图片文件不正确", Toast.LENGTH_LONG).show();
		}
	}
}

UploadUtil.java

package com.fg.util;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Iterator;
import java.util.Map;
import java.util.UUID;

import android.util.Log;

/**
 * 
 * 上传工具类
 * @author ICQwlj

 * Email :[email protected]

 * 支持上传文件和参数
 */
public class UploadUtil {
	private static UploadUtil uploadUtil;
	private static final String BOUNDARY =  UUID.randomUUID().toString(); // 边界标识 随机生成
	private static final String PREFIX = "--";
	private static final String LINE_END = "\r\n";
	private static final String CONTENT_TYPE = "multipart/form-data"; // 内容类型
	private UploadUtil() {

	}

	/**
	 * 单例模式获取上传工具类
	 * @return
	 */
	public static UploadUtil getInstance() {
		if (null == uploadUtil) {
			uploadUtil = new UploadUtil();
		}
		return uploadUtil;
	}

	private static final String TAG = "UploadUtil";
	private int readTimeOut = 10 * 1000; // 读取超时
	private int connectTimeout = 10 * 1000; // 超时时间
	
	/***
	 * 请求使用多长时间
	 */
	private static int requestTime = 0;
	
	private static final String CHARSET = "utf-8"; // 设置编码

	/***
	 * 上传成功
	 */
	public static final int UPLOAD_SUCCESS_CODE = 1;
	
	/**
	 * 文件不存在
	 */
	public static final int UPLOAD_FILE_NOT_EXISTS_CODE = 2;
	
	/**
	 * 服务器出错
	 */
	public static final int UPLOAD_SERVER_ERROR_CODE = 3;
	protected static final int WHAT_TO_UPLOAD = 1;
	protected static final int WHAT_UPLOAD_DONE = 2;
	
	/**
	 * android上传文件到服务器
	 * 
	 * @param filePath
	 *            需要上传的文件的路径
	 * @param fileKey
	 *            在网页上 xxx就是这里的fileKey
	 * @param RequestURL
	 *            请求的URL
	 */
	public void uploadFile(String filePath, String fileKey, String RequestURL, Map<String, String> param) {
		if (filePath == null) {
			sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在");
			return;
		}
		try {
			File file = new File(filePath);
			uploadFile(file, fileKey, RequestURL, param);
		} catch (Exception e) {
			sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在");
			e.printStackTrace();
			return;
		}
	}

	/**
	 * android上传文件到服务器
	 * 
	 * @param file
	 *            需要上传的文件
	 * @param fileKey
	 *            在网页上 xxx就是这里的fileKey
	 * @param RequestURL
	 *            请求的URL
	 */
	public void uploadFile(final File file, final String fileKey, final String RequestURL, final Map<String, String> param) {
		if (file == null || (!file.exists())) {
			sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在");
			return;
		}

		Log.i(TAG, "请求的URL=" + RequestURL);
		Log.i(TAG, "请求的fileName=" + file.getName());
		Log.i(TAG, "请求的fileKey=" + fileKey);
		new Thread(new Runnable() {  //开启线程上传文件
			@Override
			public void run() {
				toUploadFile(file, fileKey, RequestURL, param);
			}
		}).start();
		
	}

	private void toUploadFile(File file, String fileKey, String RequestURL, Map<String, String> param) {
		String result = null;
		requestTime= 0;
		
		long requestTime = System.currentTimeMillis();
		long responseTime = 0;

		try {
			URL url = new URL(RequestURL);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setReadTimeout(readTimeOut);
			conn.setConnectTimeout(connectTimeout);
			conn.setDoInput(true); // 允许输入流
			conn.setDoOutput(true); // 允许输出流
			conn.setUseCaches(false); // 不允许使用缓存
			conn.setRequestMethod("POST"); // 请求方式
			conn.setRequestProperty("Charset", CHARSET); // 设置编码
			conn.setRequestProperty("connection", "keep-alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
			conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
			
			/**
			 * 当文件不为空，把文件包装并且上传
			 */
			DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
			StringBuffer sb = null;
			String params = "";
			
			/***
			 * 以下是用于上传参数
			 */
			if (param != null && param.size() > 0) {
				Iterator<String> it = param.keySet().iterator();
				while (it.hasNext()) {
					sb = null;
					sb = new StringBuffer();
					String key = it.next();
					String value = param.get(key);
					sb.append(PREFIX).append(BOUNDARY).append(LINE_END);
					sb.append("Content-Disposition: form-data; name=\"").append(key).append("\"").append(LINE_END).append(LINE_END);
					sb.append(value).append(LINE_END);
					params = sb.toString();
					Log.i(TAG, key+"="+params+"##");
					dos.write(params.getBytes());
				}
			}
			
			sb = null;
			params = null;
			sb = new StringBuffer();
			/**
			 * 这里重点注意： name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
			 * filename是文件的名字，包含后缀名的 比如:abc.png
			 */
			sb.append(PREFIX).append(BOUNDARY).append(LINE_END);
			sb.append("Content-Disposition:form-data; name=\"" + fileKey
					+ "\"; filename=\"" + file.getName() + "\"" + LINE_END);
			sb.append("Content-Type:image/pjpeg" + LINE_END); // 这里配置的Content-type很重要的 ，用于服务器端辨别文件的类型的
			sb.append(LINE_END);
			params = sb.toString();
			sb = null;
			
			Log.i(TAG, file.getName()+"=" + params+"##");
			dos.write(params.getBytes());
			/**上传文件*/
			InputStream is = new FileInputStream(file);
			onUploadProcessListener.initUpload((int)file.length());
			byte[] bytes = new byte[1024];
			int len = 0;
			int curLen = 0;
			while ((len = is.read(bytes)) != -1) {
				curLen += len;
				dos.write(bytes, 0, len);
				onUploadProcessListener.onUploadProcess(curLen);
			}
			is.close();
			
			dos.write(LINE_END.getBytes());
			byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();
			dos.write(end_data);
			dos.flush();

			/**
			 * 获取响应码 200=成功 当响应成功，获取响应的流
			 */
			int res = conn.getResponseCode();
			responseTime = System.currentTimeMillis();
			this.requestTime = (int) ((responseTime-requestTime)/1000);
			Log.e(TAG, "response code:" + res);
			if (res == 200) {
				Log.e(TAG, "request success");
				InputStream input = conn.getInputStream();
				StringBuffer sb1 = new StringBuffer();
				int ss;
				while ((ss = input.read()) != -1) {
					sb1.append((char) ss);
				}
				result = sb1.toString();
				Log.e(TAG, "result : " + result);
				sendMessage(UPLOAD_SUCCESS_CODE, "上传结果："
						+ result);
				return;
			} else {
				Log.e(TAG, "request error");
				sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：code=" + res);
				return;
			}
		} catch (MalformedURLException e) {
			sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：error=" + e.getMessage());
			e.printStackTrace();
			return;
		} catch (IOException e) {
			sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：error=" + e.getMessage());
			e.printStackTrace();
			return;
		}
	}

	/**
	 * 发送上传结果
	 * @param responseCode
	 * @param responseMessage
	 */
	private void sendMessage(int responseCode,String responseMessage)
	{
		onUploadProcessListener.onUploadDone(responseCode, responseMessage);
	}
	
	/**
	 * 下面是一个自定义的回调函数，用到回调上传文件是否完成
	 * 
	 * @author shimingzheng
	 * 
	 */
	public static interface OnUploadProcessListener {
		/**
		 * 上传响应
		 * @param responseCode
		 * @param message
		 */
		void onUploadDone(int responseCode, String message);
		/**
		 * 上传中
		 * @param uploadSize
		 */
		void onUploadProcess(int uploadSize);
		/**
		 * 准备上传
		 * @param fileSize
		 */
		void initUpload(int fileSize);
	}
	private OnUploadProcessListener onUploadProcessListener;
	
	

	public void setOnUploadProcessListener(
			OnUploadProcessListener onUploadProcessListener) {
		this.onUploadProcessListener = onUploadProcessListener;
	}

	public int getReadTimeOut() {
		return readTimeOut;
	}

	public void setReadTimeOut(int readTimeOut) {
		this.readTimeOut = readTimeOut;
	}

	public int getConnectTimeout() {
		return connectTimeout;
	}

	public void setConnectTimeout(int connectTimeout) {
		this.connectTimeout = connectTimeout;
	}
	/**
	 * 获取上传使用的时间
	 * @return
	 */
	public static int getRequestTime() {
		return requestTime;
	}
	
	public static interface uploadProcessListener{		
	}
}

AndroidMainfest.xml

xml version="1.0" encoding="utf-8"?>
 xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.fg.activity"
      android:versionCode="1"
      android:versionName="1.0">
     android:minSdkVersion="10" />
    
     android:name="android.permission.INTERNET" />
     android:name="android.permission.ACCESS_WIFI_STATE" />
     android:name="android.permission.ACCESS_NETWORK_STATE" />
     android:name="android.permission.CAMERA" />
     android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
     android:name="android.permission.READ_LOGS" />

     android:icon="@drawable/logo" android:label="@string/app_name">
         android:name=".MainActivity"
                  android:label="@string/app_name">
            
                 android:name="android.intent.action.MAIN" />
                 android:name="android.intent.category.LAUNCHER" />
            
        
         android:name=".SelectPicActivity" android:theme="@style/DialogStyleBottom"/>

    

三、服务器源码

FileUpload.java

package com.zhangke.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.text.DecimalFormat;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

/***
 * 文件上传例子   resource code encoding is utf-8
 * 
主要为了android客户端实现功能   代码写的乱   请大家见谅
 * @author ICQwlj

 * Email :[email protected]

 *
 */
public class FileUpload extends ActionSupport {

	private String savePath;
	/**这里的名字和html的名字必须对称*/
	private File img;
	/**要上传的文件类型*/
	private String imgContentType;
	/**文件的名称*/
	private String imgFileName;
	
	private String orderId;

	public String getSavePath() {
		return ServletActionContext.getServletContext().getRealPath(savePath);
	}

	public File getImg() {
		return img;
	}

	public String getImgFileName() {
		return imgFileName;
	}

	public void setSavePath(String value) {
		this.savePath = value;
	}

	public void setImgFileName(String imgFileName) {
		this.imgFileName = imgFileName;
	}

	public void setImg(File img) {
		this.img = img;
	}

	public String getImgContentType() {
		return imgContentType;
	}

	public void setImgContentType(String imgContentType) {
		this.imgContentType = imgContentType;
	}

	public String getOrderId() {
		return orderId;
	}

	public void setOrderId(String orderId) {
		this.orderId = orderId;
	}

	/**
	 * 指定的上传类型zip和图片格式的文件
	 */
	private static final String[] types = { "application/x-zip-compressed",
			"ZIP", "image/pjpeg","image/x-png","image/jpeg","image/png" };  //"application/octet-stream; charset=utf-8",

	/***
	 * 判断文件的类型是否为指定的文件类型
	 * @return
	 */
	public boolean filterType() {
		boolean isFileType = false;
		String fileType = getImgContentType();
		System.out.println(fileType);
		for (String type : types) {
			if (type.equals(fileType)) {
				isFileType = true;
				break;
			}
		}
		return isFileType;
	}

	/**
	 * 取得文件夹大小
	 * 
	 * @param f
	 * @return
	 * @throws Exception
	 */
	public long getFileSize(File f) throws Exception {
		return f.length();
	}

	public String FormetFileSize(long fileS) {// 转换文件大小
		DecimalFormat df = new DecimalFormat("#.00");
		String fileSizeString = "";
		if (fileS < 1024) {
			fileSizeString = df.format((double) fileS) + "B";
		} else if (fileS < 1048576) {
			fileSizeString = df.format((double) fileS / 1024) + "K";
		} else if (fileS < 1073741824) {
			fileSizeString = df.format((double) fileS / 1048576) + "M";
		} else {
			fileSizeString = df.format((double) fileS / 1073741824) + "G";
		}
		return fileSizeString;
	}

	/**
	 * 上传文件操作
	 * 
	 * @return
	 * @throws Exception
	 */
	public String upload() throws Exception {
		
		String ct  =  ServletActionContext.getRequest().getHeader("Content-Type");
		System.out.println("Content-Type="+ct);
		String result = "unknow error";
		System.out.println("orderId="+getOrderId());
		PrintWriter out = ServletActionContext.getResponse().getWriter();
		if (!filterType()) {
			System.out.println("文件类型不正确");
			ServletActionContext.getRequest().setAttribute("typeError",
					"您要上传的文件类型不正确");

			result = "error:" + getImgContentType() + " type not upload file type";
		} else {
			System.out.println("当前文件大小为："
					+ FormetFileSize(getFileSize(getImg())));
			FileOutputStream fos = null;
			FileInputStream fis = null;
			try {
				// 保存文件那一个路径
				fos = new FileOutputStream(getSavePath() + "\\"
						+ getImgFileName());
				fis = new FileInputStream(getImg());
				byte[] buffer = new byte[1024];
				int len = 0;
				while ((len = fis.read(buffer)) > 0) {
					fos.write(buffer, 0, len);
				}
				result = "upload file success !";
			} catch (Exception e) {
				result = "upload file failed ! ";
				e.printStackTrace();
			} finally {
				fos.close();
				fis.close();
			}
		}
		out.print(result);
		return null;
	}
}

struts.xml

xml version="1.0" encoding="UTF-8" ?>


	 name="struts.custom.i18n.resources" value="globalMessages"/>
	 name="struts.i18n.encoding" value="utf-8"/>
	
	 name="struts.multipart.saveDir" value="D:\apache-tomcat-6.0.35/temp"/>
	 name="struts.multipart.maxSize" value="30000000">
	 name="lee" extends="struts-default">
		 name="file_*" class="com.zhangke.action.FileUpload" method="{1}">
			 name="fileUpload">
				
				 name="maximumSize">524288000
			
			 name="defaultStack"/>
			
			 name="savePath">/upload
			 name="success">index.jsp
			 name="input">index.jsp
		
	
    

四、效果图

  五、完整的代码： http://download.csdn.net/detail/wlj142/7594879。其中，代码参考借鉴了蛮多人，在此就不一一例举了。

PS：如果是在本地服务器上调试代码，个人有以下几点建议：

1、最好拿真机来跑Android程序，因为有些时候，模拟器上报错是因为模拟器的某些硬件不支持，毕竟最后要拿到真机上运行。而且，用真机运行程序还有一个好处，就是运行速度快，加载模拟器的时间实在是不敢恭维；

2、如果自身的服务器没有对外IP，则需要通过将本地服务器与真机同时连接到一个无线路由里面，由路由器统一分配IP，然后再在客户端里面的访问HTTP的URL中，将IP改为服务器所获得到的IP地址即可。当然，也可以使用10.0.2.2来访问本地服务器，不过得通过USB线连接真机。

以上是个人看法，仅供参考。