如何使用apigee android sdk连接apigee代理（Oauth验证）？

我想在android应用程序中使用apigee android sdk。通过使用android sdk，我想连接apigee端点代理，但api代理已经通过Oauth 2.0验证。如何访问我们的代理

//Create client entity
String ORGNAME = "your-org";
String APPNAME = "your-app";        
ApigeeClient apigeeClient = new ApigeeClient(ORGNAME,APPNAME);
DataClient dataClient = apigeeClient.getDataClient();

String type = "item"; //entity type to be retrieved
Map queryString =  null; //we don't need any additional query parameters, in this case

//call getCollectionAsync to initiate the asynchronous API call    
dataClient.getCollectionAsync(type, queryString, new ApiResponseCallback() {    

//If getEntitiesAsync fails, catch the error
    @Override
    public void onException(Exception e) { 
        // Error
    }

    //If getCollectionAsync is successful, handle the response object
    @Override
    public void onResponse(ApiResponse response) {
        try { 
            if (response != null) {
                // Success
            }
        } catch (Exception e) { //The API request returned an error
                // Fail
        }
    }
}); 

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Android SDK中目前不支持OAuth