java - 如何将图像从 Android 上传到 Google Cloud (Java)？

Question

我正在开发一个基于 Android 的应用程序，该应用程序与 Google Cloud 交互。我需要将图片上传到云端。我已经开发了 PHP+Android 的代码，但我不知道如何在 Google Cloud (JAVA) 中处理它。

Android 代码:

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_PICTURE) {


            Uri selectedImageUri = data.getData();
            String selectedImagePath = getPath(selectedImageUri);

            InputStream is;
            BitmapFactory.decodeFile(data.getData().toString());
            Bitmap bitmapOrg = BitmapFactory.decodeFile(selectedImagePath); //BitmapFactory.decodeResource(getResources(),R.drawable.gallery);
            ByteArrayOutputStream bao = new ByteArrayOutputStream();
            bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 90, bao);
            byte [] ba = bao.toByteArray();
            String ba1 = Base64.encodeToString(ba, 1);
            ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("image",ba1));
            try{
                HttpClient httpclient = new DefaultHttpClient();
                httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, "Custom user agent");
                HttpPost httppost = new
                HttpPost("http://umair-p.appspot.com/imageupload");
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                HttpResponse response = httpclient.execute(httppost);
                HttpEntity entity = response.getEntity();
                is = entity.getContent();
                Toast.makeText(Main.this, is.toString(), Toast.LENGTH_LONG).show();
                //Toast.makeText(Main.this, "Picture Shared", Toast.LENGTH_LONG).show();
            }
            catch(Exception e){
                Toast.makeText(Main.this, "Exception: " + e.toString(), Toast.LENGTH_LONG).show();
            }

            //Toast.makeText(Main.this, data.getData().toString(), Toast.LENGTH_SHORT).show();
        }
    }
}

PHP 代码(工作正常):

<?php
$base=$_REQUEST['image'];
echo $base;
// base64 encoded utf-8 string
$binary=base64_decode($base);
// binary, utf-8 bytes
header('Content-Type: bitmap; charset=utf-8');
// print($binary);
//$theFile = base64_decode($image_data);
$file = fopen('test.jpg', 'wb');
fwrite($file, $binary);
fclose($file);
echo '<img src=test.jpg>';
?>

上述解决方案工作正常，但我需要将图像上传到 Google Cloud。有什么帮助吗？

Answer 1

您需要从 AppEngine 应用程序生成上传 URL。

首先，对 http://umair-p.appspot.com/imageupload 执行 HTTP GET

然后，在服务器上调用 blobstoreService.createUploadUrl("/imageupload")。返回在 HTTP 响应中生成的 URL。

最后，Android 应用从响应中读取 URL，并在 HTTP POST 请求中使用它来上传图像。