android上传文件至服务器

class FileUploadTask extends AsyncTask<Object, Integer, String> {// private ProgressDialog dialog = null;Dialog dialog = new Dialog(PhotoUploadActivity.this,R.style.ProgressBarDialog);String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成String PREFIX = "--", LINE_END = "\r\n";String CONTENT_TYPE = "multipart/form-data"; // 内容类型File uploadFile = new File(filePath);long totalSize = uploadFile.length(); // Get size of file, bytesProgressBar mProgress;TextView mProgress_txt;@Overrideprotected void onPreExecute() {/* * dialog = new ProgressDialog(PhotoUploadActivity.this); * dialog.setTitle("正在上传..."); * dialog.setMessage("0k/"+totalSize/1000+"k"); * dialog.setIndeterminate(false); * dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); * dialog.setProgress(0); dialog.show(); */dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);dialog.setContentView(R.layout.dialog_photo_progressbar);dialog.setCancelable(true);DisplayMetrics dm = PhotoUploadActivity.this.getApplicationContext().getResources().getDisplayMetrics();int width = dm.widthPixels;WindowManager.LayoutParams params = dialog.getWindow().getAttributes();params.width = 9 * width / 10;dialog.getWindow().setAttributes(params);mProgress = (ProgressBar) dialog.findViewById(R.id.progress_horizontal);mProgress_txt = (TextView) dialog.findViewById(R.id.progress_txt);mProgress.setMax(100);mProgress.setProgress(0);mProgress.setIndeterminate(false);dialog.setCancelable(false);// 设置这个对话框不能被用户按[返回键]而取消掉,但测试发现如果用户按了KeyEvent.KEYCODE_SEARCH,对话框还是会Dismiss掉// 由于设置alertDialog.setCancelable(false);// 发现如果用户按了KeyEvent.KEYCODE_SEARCH,对话框还是会Dismiss掉,这里的setOnKeyListener作用就是屏蔽用户按下KeyEvent.KEYCODE_SEARCHdialog.setOnKeyListener(new DialogInterface.OnKeyListener() {public boolean onKey(DialogInterface dialog, int keyCode,KeyEvent event) {if (keyCode == KeyEvent.KEYCODE_SEARCH) {return true;} else {return false; // 默认返回 false}}});dialog.show();dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);}@Overrideprotected String doInBackground(Object... arg0) {String result = "";long length = 0;int progress;int bytesRead, bytesAvailable, bufferSize;byte[] buffer;int maxBufferSize = 10 * 1024;// 10KBtry {URL url = new URL(actionUrl);HttpURLConnection conn = (HttpURLConnection) url.openConnection();// Set size of every block for postconn.setChunkedStreamingMode(128 * 1024);// 128KBconn.setReadTimeout(TIME_OUT);conn.setConnectTimeout(TIME_OUT);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("Content-Type", CONTENT_TYPE+ ";boundary=" + BOUNDARY);if (uploadFile != null) {/** * 当文件不为空，把文件包装并且上传 */DataOutputStream dos = new DataOutputStream(conn.getOutputStream());StringBuffer sb = new StringBuffer();sb.append(PREFIX);sb.append(BOUNDARY);sb.append(LINE_END);/** * 这里重点注意： name里面的值为服务端需要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("Content-Disposition: form-data; name=\"myFile\"; filename=\"" + java.net.URLEncoder.encode(uploadFile.getName(), "UTF-8") + "\"" + LINE_END);sb.append("Content-Type: application/octet-stream; charset="+ CHARSET + LINE_END);sb.append(LINE_END);dos.write(sb.toString().getBytes());InputStream is = new FileInputStream(uploadFile);bytesAvailable = is.available();bufferSize = Math.min(bytesAvailable, maxBufferSize);// 设置每次写入的大小buffer = new byte[bufferSize];// Read filebytesRead = is.read(buffer, 0, bufferSize);while (bytesRead > 0) {dos.write(buffer, 0, bufferSize);length += bufferSize;Thread.sleep(500);progress = (int) ((length * 100) / totalSize);publishProgress(progress, (int) length);bytesAvailable = is.available();bufferSize = Math.min(bytesAvailable, maxBufferSize);bytesRead = is.read(buffer, 0, bufferSize);}byte[] bytes = new byte[1024];int len = 0;while ((len = is.read(bytes)) != -1) {dos.write(bytes, 0, len);}is.close();dos.write(LINE_END.getBytes());// 请求结束标志byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();dos.write(end_data);dos.flush();publishProgress(100, (int) length);/** * 获取响应码 200=成功 当响应成功，获取响应的流 */int res = conn.getResponseCode();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 + "fffff"+ new File(filePath).getName() + "呵呵呵" + sb1);} else {Log.e(TAG, "request error");}}} catch (Exception ex) {}return result;}@Overrideprotected void onProgressUpdate(Integer... progress) {// dialog.setProgress(progress[0]);// dialog.setMessage(progress[1]/1000+"k/"+totalSize/1000+"k");Log.i(TAG, "已经上传----->" + progress[1] / 1000 + "k/" + totalSize/ 1000 + "k");mProgress.setProgress(progress[0]);mProgress_txt.setText(progress[1] / 1000 + "k/" + totalSize / 1000+ "k" + "  " + progress[1] * 100 / totalSize + "%");}@Overrideprotected void onPostExecute(String result) {try {if ("1".equals(result)) {Toast.makeText(PhotoUploadActivity.this, "上传成功!",Toast.LENGTH_LONG).show();} else {Toast.makeText(PhotoUploadActivity.this, "上传失败!",Toast.LENGTH_LONG).show();}} catch (Exception e) {} finally {try {dialog.dismiss();} catch (Exception e) {}}}
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