如何使用字节数组上传图像答案

【问题标题】：how to upload image using byte array如何使用字节数组上传图像
【发布时间】：2017-01-18 06:18:36
【问题描述】：

我正在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;

}

我有一个上传图片的网络服务，它有 5 个参数，其中 4 个是字符串，一个是字节数组 (byte[] f)

主要问题：如何将我的源文件（图像）转换为字节数组，以将图像上传到服务器上，上面的代码对应于这个网络服务。

【问题讨论】：

您的代码已经将文件作为字节数组上传。正常的分段上传就是这样做的。

标签： android arrays android-asynctask http-post android-image

【解决方案1】：

您可以使用android第三方“AndroidAsync”。您可以通过此代码执行任何操作。请检查此

https://github.com/koush/AndroidAsync

谢谢

【讨论】：

【解决方案2】：

首先，你可以从源文件中获取绝对路径，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);

    }

【讨论】：

如何在这里调用你的方法：entity.addPart("f", new FileBody(sourceFile));?

【解决方案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();
        }
    }
}

【讨论】：