Question

我尝试使用此代码上传图片：

   private String uploadFile() {
 String responseString = null;

 try {

  HttpClient httpclient = new DefaultHttpClient();
  HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL_M);



  Log.i("UploadApp", "upload url: " + Config.FILE_UPLOAD_URL_M);


  AndroidMultiPartEntity entity;
  entity = new AndroidMultiPartEntity(
   new AndroidMultiPartEntity.ProgressListener() {

    @Override
    public void transferred(long num) {
     // publishProgress((int) ((num / (float) totalSize) * 100));
    }
   });

  File sourceFile;
  sourceFile = new File(compressImage(filePath));

  Log.i("UploadApp", "file path: " + filePath);

  // Adding file data to http body

  entity.addPart("f", new FileBody(sourceFile)); //problem is here


  entity.addPart("category", new StringBody("Bill"));
  entity.addPart("description", new StringBody("test single"));
  entity.addPart("file", new StringBody("unknown1"));
  entity.addPart("clientid", new StringBody("4"));



  totalSize = entity.getContentLength();
  httppost.setEntity(entity);

  // Making server call
  HttpResponse response = httpclient.execute(httppost);
  HttpEntity r_entity = response.getEntity();

  int statusCode = response.getStatusLine().getStatusCode();
  if (statusCode == 200) {
   // Server response
   responseString = EntityUtils.toString(r_entity);
  } else {
   responseString = "Error occurred! Http Status Code: " + statusCode;
  }

 } catch (ClientProtocolException e) {
  responseString = e.toString();
  Log.e("UploadApp", "exception: " + responseString);
 } catch (IOException e) {
  responseString = e.toString();
  Log.e("UploadApp", "exception: " + responseString);
 }

 return responseString;

}

我有一个用于上传图像的web服务，它有5个参数，其中4个是字符串，但是一个是字节数组（byte [] f）

主要问题：如何在字节数组中转换我的源文件（图像），以便在上面代码对应此Web服务的服务器上上传图像。

Answer 1

你可以使用android第三方“AndroidAsync”。你可以从这个代码做任何事情.plz检查这个

https://github.com/koush/AndroidAsync

由于

Answer 2

首先，从源文件中你可以获得绝对路径然后调用上传方法

String mCurrentPhotoPath = sourceFile.getAbsolutePath();


private String upload() {
        Bitmap bm = BitmapFactory.decodeFile(mCurrentPhotoPath);
        ByteArrayOutputStream bao = new ByteArrayOutputStream();
        bm.compress(Bitmap.CompressFormat.JPEG, 50, bao);
        byte[] ba = bao.toByteArray();
        return Base64.encodeToString(ba, Base64.DEFAULT);

    }

Answer 3

您可以使用此代码上传任何文件，仅发送带有点扩展名文件编码字符串的文件名

在服务器端发送编码字符串和Base64.decode文件字符串

String strAttachmentCoded = "";
private int PICK_PDF_REQUEST = 1;
Uri filePath;

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == PICK_PDF_REQUEST && resultCode == Activity.RESULT_OK && data != null && data.getData() != null) {
        filePath = data.getData();
        File uploadFile = new File(filePath.toString());
        URI uri = URI.create(uploadFile.getPath());
        try {
            if (uploadFile != null) {
                File uploadFile1 = new File(uri);
                FileInputStream objFileIS = new FileInputStream(uploadFile1);
                ByteArrayOutputStream objByteArrayOS = new ByteArrayOutputStream();
                byte[] byteBufferString = new byte[1024];
                int readNum;
                readNum = objFileIS.read(byteBufferString);
                while (readNum != -1) {
                    Log.v("  ", "" + readNum);
                    objByteArrayOS.write(byteBufferString, 0, readNum);
                    //                system.out.println("read " + readNum + " bytes,");
                    readNum = objFileIS.read(byteBufferString);
                }
                byte[] byteBinaryData = Base64.encode(objByteArrayOS.toByteArray(), Base64.DEFAULT);
                strAttachmentCoded = String.valueOf(byteBinaryData);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

如何使用字节数组上传图像

3 个答案: