Thread creation in itself is an overhead. We can speed up the execution by distributing the tasks among threads of execution, but can also slow it down when threads are in excess. Java threads are one-time use only and die after executing its run method. If you need, then get a quick overview of java Thread and Runnable. I expect the reader to have the basic understanding of java threads. Let’s start the exploration/revision with a questionnaire. Understanding them fully will enhance the capacity to follow the Android SDK and package classes in general.The clients can have varied implementations, but all of them will share the common android framework APIs. The same argument can also be made for companies/individuals shipping out SDKs.Writing own solution for it may not always get that level of efficiency and optimization. So, for them, the best option is to utilize the existing available resource. The developers writing libraries cannot afford to use third party libraries because of the library size.So, the understanding of it is essential to create an unblocked responsive UI. The main thread in Android is built with a Looper and Handlers.I have also created a video tutorial for this subject, and I highly recommend to watch it. They are not old school, but a neat structure on which a complex android framework is built.įor new developers, it’s highly recommended to understand the principles behind them and experienced one’s should revisit this topic to recollect the minor details. Looper, Handler, and HandlerThread are the Android’s way of solving the problems of asynchronous programming. So, why am I writing about the old school? RxJava is the most popular library today for reactive programming and designing an asynchronous application. Several libraries have been written to streamline asynchronous operations. Java itself has package and Fork/Join framework to facilitate it. MultiThreading and task running are old subjects. The other aspects of the multi-threaded operation were handled through alternate ways like ThreadPoolExecutor, IntentService, and AsyncTask. My use case involved sending tasks to the main/ui thread, primarily to update the UI from any other thread. In my own experience, I have used them in a very limited context until recently. These are among the building blocks of Android OS. This Article covers Android Looper, Handler, and HandlerThread.
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