原理
Android客戶端模擬一個HTTP的Post請求到服務器端，服務器端接收相應的Post請求后，返回響應信息給給客戶端。
背景
網上很多上傳到java服務器上的，找了好久，找到了上傳到php的了，思路跟我當初想的差不多，就是POST過去。廢話不多說，直接上圖看代碼。
php代碼
<?php$target_path = "./upload/";//接收文件目錄$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'];}?>Android代碼
上傳的主要代碼:
private void uploadFile(String uploadUrl){String end = "/r/n";String twoHyphens = "--";String boundary = "******";try{URL url = new URL(uploadUrl);HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();//http連接// 設置每次傳輸的流大小，可以有效防止手機因為內存不足崩潰// 此方法用于在預先不知道內容長度時啟用沒有進行內部緩沖的 HTTP 請求正文的流。httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K// 允許輸入輸出流httpURLConnection.setDoInput(true);httpURLConnection.setDoOutput(true);httpURLConnection.setUseCaches(false);// 使用POST方法httpURLConnection.setRequestMethod("POST");httpURLConnection.setRequestProperty("Connection", "Keep-Alive");//保持一直連接httpURLConnection.setRequestProperty("Charset", "UTF-8");//編碼httpURLConnection.setRequestProperty("Content-Type","multipart/form-data;boundary=" + boundary);//POST傳遞過去的編碼DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());//輸出流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);//文件輸入流，寫入到內存中byte[] buffer = new byte[8192]; // 8kint count = 0;// 讀取文件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();//http輸入，即得到返回的結果InputStreamReader isr = new InputStreamReader(is, "utf-8");BufferedReader br = new BufferedReader(isr);String result = br.readLine();Toast.makeText(this, result, Toast.LENGTH_LONG).show();//將結果輸出dos.close();is.close();} catch (Exception e){e.printStackTrace();setTitle(e.getMessage());}}因為安卓4.0之后耗時間的操作要求都在非UI線程中操作，即將前面的AsyncTask拿來用了吧~
AsyncTask傳送門：//www.49028c.com/article/77155.htm
在這個類中，將上傳的操作放在doInBackground當中，可以有ProgressDialog顯示上傳了多少：
// Read filebytesRead = fileInputStream.read(buffer, 0, bufferSize);while (bytesRead > 0) {outputStream.write(buffer, 0, bufferSize);length += bufferSize;progress = (int) ((length * 100) / totalSize);publishProgress(progress);bytesAvailable = fileInputStream.available();bufferSize = Math.min(bytesAvailable, maxBufferSize);bytesRead = fileInputStream.read(buffer, 0, bufferSize);}outputStream.writeBytes(lineEnd);outputStream.writeBytes(twoHyphens + boundary + twoHyphens+ lineEnd);publishProgress(100);還有就是，注意權限喲：
<uses-permission android:name="android.permission.INTERNET" />
以上內容給大家介紹了Android異步上傳圖片到PHP服務器，希望本文分享能夠給大家帶來幫助。
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