Android 图片上传 _Android

【Android 图片上传】少年恃险若平地，独倚长剑凌清秋。这篇文章主要讲述Android 图片上传相关的知识，希望能为你提供帮助。
上传方式:两种 1:Base64() (1):获取图片路径,将图片转为String 类型 (2):通过post提交的方式.以键值对的方式上传到服务器,和一般的提交关键字没有任何区别. (3):这种适用于图片少的时候使用. 转码代码如下: public class Base64Code { // constructor public Base64Code() { } /** * Encode image to Base64 string * @param srcPath * @return Base64 encoded string */ public static String encodeImageToBase64String(String srcPath) { Log.d("srcPath:", srcPath); String imageString = null; InputStream inputStream; try { inputStream = new FileInputStream(srcPath); //You can get an inputStream using any IO API byte[] bytes; byte[] buffer = new byte[8192]; int bytesRead; ByteArrayOutputStream output = new ByteArrayOutputStream(); try { while ((bytesRead = inputStream.read(buffer)) != -1) { output.write(buffer, 0, bytesRead); } inputStream.close(); bytes = output.toByteArray(); imageString = Base64.encodeToString(bytes, 0, bytes.length, Base64.NO_WRAP); } catch (IOException e) { e.printStackTrace(); } } catch (FileNotFoundException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } return imageString; } } 2:以IO流的形式进行提交(表单提交) 代码如下: String fileName = fileUrl.substring(fileUrl.lastIndexOf("/") + 1); HttpURLConnection conn = null; DataOutputStream dos = null; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; int bytesRead, bytesAvailable, bufferSize; byte[] buffer; int maxBufferSize = 1 * 1024 * 1024; File sourceFile = new File(fileUrl); if (!sourceFile.isFile()) { dialog.dismiss(); runOnUiThread(new Runnable() { public void run() { messageText.setText("Source File not exist :" + fileUrl); } }); return 0; } FileInputStream fileInputStream = new FileInputStream(sourceFile); URL url = new URL(uploadUrl); // Open a HTTP connection to the URL conn = (HttpURLConnection) url.openConnection(); conn.setDoInput(true); // Allow Inputs conn.setDoOutput(true); // Allow Outputs conn.setUseCaches(false); // Don‘t use a Cached Copy conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("ENCTYPE", "multipart/form-data"); conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary); conn.setRequestProperty("uploaded_file", fileName); dos = new DataOutputStream(conn.getOutputStream()); dos.writeBytes(twoHyphens + boundary + lineEnd); dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\"; filename=\"" + fileName + "\"" + lineEnd); dos.writeBytes(lineEnd); // create a buffer of maximum size bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); buffer = new byte[bufferSize]; // read file and write it into form... bytesRead = fileInputStream.read(buffer, 0, bufferSize); while (bytesRead > 0) { dos.write(buffer, 0, bufferSize); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); } // send multipart form data necesssary after file data... dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); // Responses from the server (code and message) serverResponseCode = conn.getResponseCode(); String serverResponseMessage = conn.getResponseMessage(); Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode); if (serverResponseCode == 200) { runOnUiThread(new Runnable() { public void run() { Toast.makeText(UploadToServerActivity.this, "File Upload Complete.", Toast.LENGTH_SHORT).show(); } }); } // close the streams // fileInputStream.close(); dos.flush(); dos.close(); 使用第三方框架Xutils 进行图片上传步骤(也称为表单提交) 第一步:首先还是在application中初始化：

x.Ext.init(this);

第二步:然后使用org.xutils.http包下的RequestParams来构造参数 params = new RequestParams(url); //上传图片的关键方法.键值对 params.addBodyParameter("upload", new File(fileName)); 第三步:使用Callback.Cancekable来进行请求回调： Callback.Cancelable cancelable