最近由于项目需求，需要完成批量照片上传，折腾了一段时间，终于完成了，达到了如下效果
主界面主要有GridView组成和按钮组成，当按下一个格点时，会调用相机或者相册，拍照或者选择相册照片，选择完成之后，将缩略图显示在GridView，在这里说明一下，如果GridView显示不出来，说明图片太大了，需要压缩，在我的上一篇博客，详细讲解了图片压缩的原理与过程，这里不再赘述。
下面贴上代码，
主界面：
package com.qian.pos;import java.util.HashMap;import java.util.Iterator;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.graphics.Picture;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.GridView;import android.widget.ImageView;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.Toast;import com.qian.pos.util.BitmapUtil;import com.qian.pos.util.FileUtils;import com.qian.pos.util.PictureUtil;import com.qian.pos.util.UploadUtil;import com.qian.pos.util.UploadUtil.OnUploadProcessListener;import com.qian.servletasynchttp.R;public class ImageUploadActivity extends Activity// implements OnUploadProcessListener{ private static final String TAG = "uploadImage"; protected static final int TO_UPLOAD_FILE = 1; protected static final int UPLOAD_FILE_DONE = 2; public static final int TO_SELECT_PHOTO = 3; private static final int UPLOAD_INIT_PROCESS = 4; private static final int UPLOAD_IN_PROCESS = 5; private static String requestURL = "http://114.55.72.18/UnionPay/UploadAction"; private Button uploadButton; //private ProgressBar progressBar; private String picPath = null; private ProgressDialog progressDialog; private GridView list_gv; private MyAdapter adapter; private HashMap<Integer,Bitmap> imageMap = new HashMap<Integer, Bitmap>(); private HashMap<Integer,String> filePathMap = new HashMap<Integer, String>(); private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what) { case TO_UPLOAD_FILE: toUploadFile(); break; case UPLOAD_INIT_PROCESS: //progressBar.setMax(msg.arg1); break; case UPLOAD_IN_PROCESS: //progressBar.setProgress(msg.arg1); 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"; break; default: break; } super.handleMessage(msg); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initView(); } private void initView() { uploadButton = (Button) this.findViewById(R.id.uploadImage); uploadButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if(picPath!=null) { handler.sendEmptyMessage(TO_UPLOAD_FILE); }else{ Toast.makeText(ImageUploadActivity.this, "上传的文件路径出错", Toast.LENGTH_LONG).show(); } } }); progressDialog = new ProgressDialog(this); list_gv = (GridView) findViewById(R.id.gv_image); adapter = new MyAdapter(); list_gv.setAdapter(adapter); list_gv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent intent; switch (position) { case 0: intent = new Intent(ImageUploadActivity.this,SelectPicActivity.class); startActivityForResult(intent, 0); break; case 1: intent = new Intent(ImageUploadActivity.this,SelectPicActivity.class); startActivityForResult(intent, 1); break; case 2: intent = new Intent(ImageUploadActivity.this,SelectPicActivity.class); startActivityForResult(intent, 2); break; case 3: intent = new Intent(ImageUploadActivity.this,SelectPicActivity.class); startActivityForResult(intent, 3); break; case 4: intent = new Intent(ImageUploadActivity.this,SelectPicActivity.class); startActivityForResult(intent, 4); break; } } }); } private class MyAdapter extends BaseAdapter { @Override public int getCount() { return 5; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = View.inflate(ImageUploadActivity.this, R.layout.item_grid, null); ImageView image = (ImageView) view.findViewById(R.id.item_grida_image); Iterator<Integer> iterator = imageMap.keySet().iterator(); while(iterator.hasNext()) { Integer next = iterator.next(); if(next.intValue() == position) { image.setImageBitmap(imageMap.get(next)); } } TextView textView = (TextView) view.findViewById(R.id.tv_explain); switch (position) { case 0: textView.setText("照片1"); break; case 1: textView.setText("<span style="font-family: 'Microsoft YaHei';">照片2</span>"); break; case 2: textView.setText("照片3"); break; case 3: textView.setText("照片4"); break; case 4: textView.setText("照片5"); break; default: break; } return view; } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if(resultCode==Activity.RESULT_OK) { picPath = data.getStringExtra(SelectPicActivity.KEY_PHOTO_PATH); Log.i(TAG, "最终选择的图片="+picPath); // Toast.makeText(getApplicationContext(), "最终选择的图片="+picPath, 0).show(); Bitmap bm = BitmapFactory.decodeFile(picPath); //Bitmap tempBitmap = BitmapUtil.createImageThumbnail(picPath,128);//压缩图片 //Bitmap saveBitmap = BitmapUtil.createImageThumbnail(picPath,2048); Bitmap tempBitmap = PictureUtil.getSmallBitmap(picPath, 128, 128);//压缩图片 Bitmap saveBitmap = PictureUtil.getSmallBitmap(picPath,1280,720);//上传服务器的bitmap 手机横着拍照 String path = Environment.getExternalStorageDirectory()+ "/pos/"+requestCode+".JPEG"; FileUtils.saveBitmap(saveBitmap, requestCode+""); filePathMap.put(requestCode, path); imageMap.put(requestCode, tempBitmap); //Toast.makeText(ImageUploadActivity.this, "第"+requestCode+"张图片", 0).show(); // System.out.println("imageMap"+imageMap.size()); // System.out.println("filePathMap"+filePathMap.size()); adapter.notifyDataSetChanged(); } super.onActivityResult(requestCode, resultCode, data); } private void toUploadFile() { progressDialog.setMessage("正在上传文件..."); progressDialog.show(); final String fileKey = "upload"; final UploadUtil uploadUtil = UploadUtil.getInstance();; uploadUtil.setOnUploadProcessListener(new OnUploadProcessListener() { @Override public void onUploadProcess(int uploadSize) { Message msg = Message.obtain(); msg.what = UPLOAD_IN_PROCESS; msg.arg1 = uploadSize; handler.sendMessage(msg); } @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); } @Override public void initUpload(int fileSize) { Message msg = Message.obtain(); msg.what = UPLOAD_INIT_PROCESS; msg.arg1 = fileSize; handler.sendMessage(msg); } }); //设置监听器监听上传状态 final Map<String, String> params = new HashMap<String, String>(); params.put("dpnumber", "13800001111"); System.out.println(filePathMap.size()); new Thread(new Runnable() { int i = 0; @Override public void run() { final boolean uploadFile = uploadUtil.uploadFile(filePathMap,fileKey,requestURL,params); runOnUiThread(new Runnable() { @Override public void run() { if(uploadFile) { Toast.makeText(ImageUploadActivity.this, "上传成功", 0).show(); progressDialog.dismiss(); } else { Toast.makeText(ImageUploadActivity.this, "上传失败", 0).show(); progressDialog.dismiss(); } } }); } }).start(); } }选择照片界面程序：
package com.qian.pos;import com.qian.servletasynchttp.R;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;public class SelectPicActivity extends Activity implements OnClickListener{ public static final int SELECT_PIC_BY_TACK_PHOTO = 1; public static final int SELECT_PIC_BY_PICK_PHOTO = 2; 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") || picPath.endsWith(".JPG") || picPath .endsWith(".JPEG"))*/) { lastIntent.putExtra(KEY_PHOTO_PATH, picPath); setResult(Activity.RESULT_OK, lastIntent); finish(); }else{ //Toast.makeText(this, picPath, Toast.LENGTH_LONG).show(); Toast.makeText(this, "选择图片文件不正确", Toast.LENGTH_LONG).show(); } }}接下来是程序的核心部分UploadUtil.java
主要实现了图片的上传，上传过程的初始化监听和上传完成的监听，还有上传耗时的计算，设置的回调接口监听器在主界面可以设置，获得必要的信息。
实现的批量的过程也在其中，使用HashMap将各个图片的路径保存在其中，然后HashMap的迭代器实现循环上传，批量上传的过程中，如果图片过大会抛出异常，加载bitmap手机太多内存，没来得及释放又要加载另一张图片，单张原图上传可以实现，但不符合市场需求，一般都是批量上传。
程序的具体执行流程就不详细说了，关键部分注释已经写好了。
package com.qian.pos.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.HashMap;import java.util.Iterator;import java.util.Map;import java.util.UUID;import android.content.Context;import android.util.Log;import android.widget.Toast;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 * 10000; // 读取超时 private int connectTimeout = 10 * 10000; // 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; public boolean uploadFile(HashMap<Integer,String> filePathMap, String fileKey, String RequestURL, Map<String, String> param) { String result = null; requestTime= 0; String fileName = ""; long requestTime = System.currentTimeMillis(); long responseTime = 0; try { // conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); Iterator<Integer> iterator = filePathMap.keySet().iterator(); boolean isOk = true; System.out.println("filePathMap.size()"+filePathMap.size()); while(iterator.hasNext()) { 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); Integer next = iterator.next(); System.out.println(next+""); String filepath = filePathMap.get(next); switch (next.intValue()) { case 0: fileName = "IDPositive"; break; case 1: fileName = "IDNative"; break; case 2: fileName = "BusinessLicense"; break; case 3: fileName = "Outdoor"; break; case 4: fileName = "Indoor"; break; default: break; } DataOutputStream dos = new DataOutputStream(conn.getOutputStream()); StringBuffer sb = null; String params = ""; 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());// dos.flush(); } } 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=\"" + fileName + "\"" + LINE_END); //+ "\"; 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, filepath.getName()+"=" + params+"##"); //Log.i(TAG, ); dos.write(params.getBytes()); /**上传文件*/ InputStream is = new FileInputStream(filepath); onUploadProcessListener.initUpload((int)filepath.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(); is = null; dos.write(LINE_END.getBytes()); byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes(); dos.write(end_data); dos.flush(); dos.close(); dos = null;// dos.write(tempOutputStream.toByteArray()); /** * 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); sb1 = null; if(fileName == "Indoor") { sendMessage(UPLOAD_SUCCESS_CODE, "上传结果："+ result); } conn.disconnect(); //return true; } else { Log.e(TAG, "request error"); sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：code=" + res); conn.disconnect(); isOk = false; } } return isOk; } catch (MalformedURLException e) { sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：error=" + e.getMessage()); e.printStackTrace(); return false; } catch (IOException e) { sendMessage(UPLOAD_SERVER_ERROR_CODE,"上传失败：error=" + e.getMessage()); e.printStackTrace(); return false; } } 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 { void onUploadDone(int responseCode, String message); void onUploadProcess(int uploadSize); 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{ } }