Skip to main content

Excellent Example of Inner Class

Many a times, I have asked myself, what is the requirement of Inner Classes, and on top of that Anonymous Inner Classes. Here is one good example. The following is an excerpt from "Android SDK's" documentation:

Listeners can be one of the more confusing aspects of UI implementation, but what we are trying to achieve in this case is simple. We simply want an onClick() method to be called when the user presses the confirm button, and we can use that to do some work and return the values of the edited note to the Intent caller. We do this using something called an anonymous inner class. This is a bit confusing to look at unless you have seen them before, but all you really need to take away from this is that you can refer to this code in the future to see how to create a listener and attach it to a button. (Listeners are a common idiom in Java development, particularly for user interfaces.)

confirmButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
}
});
You can check the entire text here: http://code.google.com/android/intro/tutorial-ex2.html

Comments

Popular posts from this blog

How to upload to Google Cloud Storage buckets using CURL

Signed URLs are pretty nifty feature given by Google Cloud Platform to let anyone access your cloud storage (bucket or any file in the bucket) without need to sign in. Official documentation gives step by step details as to how to read/write to the bucket using gsutil or through a program. This article will tell you how to upload a file to the bucket using curl so that any client which doesn't have cloud SDK installed can do this using a simple script. This command creates a signed PUT URL for your bucket. gsutil signurl -c 'text/plain' -m PUT serviceAccount.json gs://test_bucket_location Here is my URL: https://storage.googleapis.com/test_sl?GoogleAccessId=my-project-id@appspot.gserviceaccount.com&Expires=1490266627&Signature=UfKBNHWtjLKSBEcUQUKDeQtSQV6YCleE9hGG%2BCxVEjDOmkDxwkC%2BPtEg63pjDBHyKhVOnhspP1%2FAVSr%2B%2Fty8Ps7MSQ0lM2YHkbPeqjTiUcAfsbdcuXUMbe3p8FysRUFMe2dSikehBJWtbYtjb%2BNCw3L09c7fLFyAoJafIcnoIz7iJGP%2Br6gAUkSnZXgbVjr6wjN%2FIaudXIqA

Running Apache Beam pipeline using Spark Runner on a local standalone Spark Cluster

The best thing about Apache Beam ( B atch + Str eam ) is that multiple runners can be plugged in and same pipeline can be run using Spark, Flink or Google Cloud Dataflow. If you are a beginner like me and want to run a simple pipeline using Spark Runner then whole setup may be tad daunting. Start with Beam's WordCount examples  which help you quickstart with running pipelines using different types of runners. There are code snippets for running the same pipeline using different types of runners but here the code is running on your local system using Spark libraries which is good for testing and debugging pipeline. If you want to run the pipeline on a Spark cluster you need to do a little more work! Let's start by setting up a simple standalone single-node cluster on our local machine. Extending the cluster is as easy as running a command on another machine, which you want to add to cluster. Start with the obvious: install spark on your machine! (Remember to have Java a

Changing Eclipse Workspace Directory

Recently I moved my entire Eclipse installation directory but the workspace was still getting created in the older location only. And worst there was no option to select the Workspace directory in the Window->Options->Workspace menu. To change the workspace location in Eclipse do this. Goto ECLIPSE_HOME\configuration\.settings directory, edit the org.eclipse.ui.ide.prefs file and change the RECENT_WORKSPACES value to the desired location. If you want that Eclipse prompts you to select workspace when you start it, change the SHOW_WORKSPACE_SELECTION_DIALOG value to true. And you are done!