Android非同步上傳圖片到PHP伺服器_Android

原理

Android用戶端類比一個HTTP的Post請求到伺服器端，伺服器端接收相應的Post請求後，返迴響應資訊給給用戶端。

背景

網上很多上傳到java伺服器上的，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$target_path = "./upload/";//接收檔案目錄$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串連// 設定每次傳輸的流大小，可以有效防止手機因為記憶體不足崩潰// 此方法用於在預先不知道內容長度時啟用沒有進行內部緩衝的 HTTP 要求本文的流。httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K// 允許輸入輸出資料流httpURLConnection.setDoInput(true);httpURLConnection.setDoOutput(true);httpURLConnection.setUseCaches(false);// 使用POST方法httpURLConnection.setRequestMethod("POST");httpURLConnection.setRequestProperty("Connection", "Keep-Alive");//保持一直串連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());//輸出資料流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);//檔案輸入資料流，寫入到記憶體中byte[] buffer = new byte[8192]; // 8kint count = 0;// 讀取檔案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之後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：http://www.jb51.net/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，注意許可權喲：

<uses-permission android:name="android.permission.INTERNET" />

以上內容給大家介紹了Android非同步上傳圖片到PHP伺服器，希望本文分享能夠給大家帶來協助。