在 Android 中使用 Google Cloud Storage JSON api [英] Using Google Cloud Storage JSON api in android

问题描述

我想从我的 android 应用上传 Google Cloud Storage 上的图片.为此，我搜索并发现 GCS JSON Api 提供了此功能.我对 Android 示例做了很多研究，展示了它的使用.在

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第三，一旦你准备好所有这些东西，就可以开始编码了.假设我们要上传一张图片:云存储与 OAuth 配合使用，这意味着您必须是经过身份验证的用户才能使用 API.为此，最好的方法是使用

I want to upload image on Google Cloud Storage from my android app. For that I searched and found that GCS JSON Api provides this feature. I did a lot of research for Android sample which demonstrates its use. On the developer site they have provided code example that only support java. I don't know how to use that API in Android. I referred this and this links but couldn't get much idea. Please guide me on how i can use this api with android app.

解决方案

Ok guys so I solved it and got my images being uploaded in Cloud Storage all good. This is how:

Note: I used the XML API it is pretty much the same.

First, you will need to download a lot of libraries. The easiest way to do this is create a maven project and let it download all the dependencies required. From this sample project : Sample Project The libraries should be:

Second, you must be familiar with Cloud Storage using the api console You must create a project, create a bucket, give the bucket permissions, etc. You can find more details about that here

Third, once you have all those things ready it is time to start coding. Lets say we want to upload an image: Cloud storage works with OAuth, that means you must be an authenticated user to use the API. For that the best way is to authorize using Service Accounts. Dont worry about it, the only thing you need to do is in the API console get a service account like this:

We will use this service account on our code.

Fourth, lets write some code, lets say upload an image to cloud storage. For this code to work you must put your key generated in step 3 in assets folder, i named it "key.p12".

I don't recommend you to do this on your production version, since you will be giving out your key.

try{
httpTransport= new com.google.api.client.http.javanet.NetHttpTransport();


//agarro la key y la convierto en un file
AssetManager am = context.getAssets();
InputStream inputStream = am.open("key.p12"); //you should not put the key in assets in prod version.



//convert key into class File. from inputstream to file. in an aux class.
File file = UserProfileImageUploadHelper.createFileFromInputStream(inputStream,context);


//Google Credentianls
GoogleCredential credential = new GoogleCredential.Builder().setTransport(httpTransport)
        .setJsonFactory(JSON_FACTORY)
        .setServiceAccountId(SERVICE_ACCOUNT_EMAIL)
        .setServiceAccountScopes(Collections.singleton(STORAGE_SCOPE))
        .setServiceAccountPrivateKeyFromP12File(file)
        .build();




String URI = "https://storage.googleapis.com/" + BUCKET_NAME+"/"+imagename+".jpg";
HttpRequestFactory requestFactory = httpTransport.createRequestFactory(credential);


GenericUrl url = new GenericUrl(URI);




//byte array holds the data, in this case the image i want to upload in bytes.

HttpContent contentsend = new ByteArrayContent("image/jpeg", byteArray );


HttpRequest putRequest = requestFactory.buildPutRequest(url, contentsend);



com.google.api.client.http.HttpResponse response = putRequest.execute();
String content = response.parseAsString();
Log.d("debug", "response is:"+response.getStatusCode());
Log.d("debug", "response content is:"+content);} catch (Exception e) Log.d("debug", "Error in  user profile image uploading", e);}

This will upload the image to your cloud bucket.

For more info on the api check this link Cloud XML API

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