ADF querying the policy store

Earlier, I had covered an example here, which showed how to dynamically create users and map the application roles to enterprise groups. In this post, the sample application is extended to show how you can query the application roles from the application stripe(application specific policies). To query the application specific roles, you need to access...

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Automatically Detect Content Encoding

You might be aware that there are different content encoding formats for encoding the text. Generally, it is safe to use UTF encoding, but at least you would expect that the websites would specify the encoding format in the response. Alas, you might find certain sites , which just send the content without specifying the content encoding that they are using. So to detect content encoding for such cases, you need a FSM (Finite State Machine). Initially, you just split the input into individual characters and then pass them onto different state machines,...

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Analyzing memory leaks in Android

In this post I will share an example of analyzing memory leak in an Android application. I recently tried to integrate a popular android library ShowcaseView which can be used for first run demos in your android application. The thing is while testing the library, I noticed severe memory leaks. This was occurring because references to ShowcaseView...

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Handling and Identifying SSL Handshake errors

SSL handshake errors can occur due to various reasons such as Self Signed certificate, unavailability of protocol or cipher suite requested by client or server, etc.  Recently I faced this issue where I was connecting to third party server using HttpClient library.  Here’s what I did to identify the cause:- Firstly, I enabled the debug flag for SSL,handshake and failure on  javax.net packages. -Djavax.net.debug=ssl,handshake,failureOn examining the logs, I could see that the third party site was expecting a cipher key of 256...

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ProGuard configuration for Retrofit

If you use ProGuard for obfuscating your code and happen to use Retrofit in your application, you will need to configure ProGuard to exclude certain Retrofit files from being obfuscated. Also you must note that if you are using GSON for conversion from JSON to POJO representation, you must ignore those POJO classes from being obfuscated, this is required as if those POJO class  field names are obfuscated, conversion to POJO’s from JSON would fail because POJO  field names are inferred from JSON response.   So to keep it brief...

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Book Review: Bulletproof Android: Practical Advice for Building Secure Apps

I recently reviewed this title and found it short on a few important consideration such as cross client authorization. This is definitely a book for developers who are beginning android application development, but isn’t comprehensive. I discuss about what each chapter covers and then offer suggestions later on how this book can be improved further....

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Apache Chemistry and CMIS

In this post, I will explain how you can use apache chemistry API’s to query the enterprise content management systems. Apache Chemistry project provides client libraries for you to easily implement integration with any of the content management products that support or implement CMIS standard. As you might be aware that there are multiple standards such as JCR and CMIS  for interacting with the content repositories. Although with JCR 2 support for SQL-92 is now available,  I really prefer the conciseness and wider adoption of the ...

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Retrofit custom JSON deserializer

Retrofit uses Google’s gson libraries to deserialize JSON representation to Java object representation. Although, this deserialization process works for most of the cases, sometimes you would have to override the deserialization process to parse a part of the response or because you don’t have any clear object representation of the JSON data. In this post, I will share an example of a custom deserializer to parse the response from Wiktionary’s word definition API. First, let us take a look at the request and response. The request URL is mentioned...

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Simply Read: A Rss/Atom Feed Reader for android

In the past few weeks, I had been working on an android application, for reading feed articles, there were quite a few takeaways from that experience and I am just sharing few of those, along with the link and features to the application.  The app can be downloaded from the link: Simply Read on Play Store Takeaways: - Parsing is slow: As...

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