Efficient Android Threading: Asynchronous Processing by Anders Goransson

By Anders Goransson


Multithreading is key so as to create an Android app with an outstanding person event, yet how have you learnt which options can assist resolve your challenge? This sensible e-book describes many asynchronous mechanisms on hand within the Android SDK, and offers instructions for choosing those the best option for the app you’re building.

Author Anders Goransson demonstrates the benefits and downsides of every approach, with pattern code and specific causes for utilizing it successfully. the 1st a part of the booklet describes the construction blocks of asynchronous processing, and the second one half covers Android libraries and constructs for constructing quick, responsive, and well-structured apps.

comprehend multithreading fundamentals in Java and at the Android platform
learn the way threads converse inside and among processes
Use options to minimize the danger of reminiscence leaks
deal with the lifecycle of a uncomplicated thread
Run initiatives sequentially within the history with HandlerThread
Use Java’s Executor Framework to manage or cancel threads
deal with history job execution with AsyncTask and IntentService
entry content material companies with AsyncQueryHandler
Use loaders to replace the UI with new data

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Additional info for Efficient Android Threading: Asynchronous Processing Techniques for Android Applications

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The niceness mapping values in the table are from Jelly Bean. The Linux Process and Threads | 35 Control groups Android not only relies on the regular Linux CFS for thread scheduling, but also imposes thread control groups 4 on all threads. The thread control groups are Linux containers that are used to manage the allocation of processor time for all threads in one container. All threads created in an application belong to one of the thread control groups. Android defines multiple control groups, but the most important ones for applications are the Foreground Group and Background Group.

The second part of this book, Part II, is all about creating back‐ ground threads. 30 | Chapter 3: Threads on Android A background thread created here in the application would look like this in the ps -t output. The last field is the name. The thread name, by default, ends with the number assigned by the runtime to the thread as its ID: u0_a72 4283 4257 320304 34540 ffffffff 00000000 S Thread-12412 In the application, the use cases for the UI thread and worker threads are quite different, but in Linux they are both plain native threads and are handled equally.

For Android, the parent of all processes is the Zygote. Stack Local function pointers and variables. Heap The address space allocated to a process. The address space is kept private to a process and can’t be accessed by other processes. The Linux Process and Threads | 31 Finding Application Process Information The process information of a running application is retrieved by the ps (process status) command, which you can call from the ADB shell. The Android ps command retrieves process information just as it would on any Linux distribution.

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