Android new thread memory leak

There is also a comprehensive example available in the API demos which illustrates the concept. Here are some general tips to consider when dealing with coordinating your long-running background tasks with the Activity lifecycle:.

Dealing with Memory Leaks from Anonymous Classes in Android | Jana Technology

Favor static inner classes over nonstatic. Each instance of a nonstatic inner class will have an extraneous reference to its outer Activity instance. Storing this reference can result in the Activity being retained when it would otherwise be eligible for garbage collection. In the example above, it is easy to assume that when the user exits the Activity and the Activity instance is finalized for garbage collection, any running threads associated with that Activity will be reclaimed as well.

This is never the case.

Threads and UI object references

Java threads will persist until either they are explicitly closed or the entire process is killed by the Android system. As a result, it is extremely important that you remember to implement cancellation policies for your background threads, and to take appropriate action when Activity lifecycle events occur. Consider whether or not you should use a Thread. The Android application framework provides many classes designed to make background threading easier for developers.

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For example, consider using a Loader instead of a thread for performing short-lived asynchronous background queries in conjunction with the Activity lifecycle. Likewise, if the background thread is not tied to any specific Activity, consider using a Service and report the results back to the UI using a BroadcastReceiver.

Your Answer

Lastly, remember that everything discussed regarding threads in this blog post also applies to AsyncTask s since the AsyncTask class uses an ExecutorService to execute its tasks. The source code for this blog post is available on GitHub. A standalone application which mirrors the source code exactly is also available for download on Google Play. Android Design Patterns is a website for developers who wish to better understand the Android application framework. The tutorials here emphasize proper code design and project maintainability. Submit a pull request!

Better performance through threading

The code powering this site is open-source and available on GitHub. Corrections are appreciated and encouraged!

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Consider the Activity code below, which starts and loops a new thread upon its creation: Find a typo? And I clicked hopeless "Gause GC" button. Eventually heap size was gone about 20MB and out of memory exception caused.

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  • How can I release Thread instance object? In most cases it is better to use an Executor instead of a thread. If you use something like a cachedThreadPool it will handle the active threads for you.

    9 ways to avoid memory leaks in Android

    Reed Reed It really shouldn't matter. There should be no instance where you need to create threads. And creating one thread will not use up that much memory. And the fact that you're creating so many threads might be the cause of the problem. If you were to create one, interupt it, and make it null, then chances are it would be cleared from memory. If not, then I don't believe there's anything you'd be able to do about it. This actually fixed it for my situation where I am creating threads in about 20 minutes using an array of 12 Thread objects.

    In my situation, I have an AtomicBoolean array for multiple threads that tells me thread is finished - and then I interrupt on the original Thread object before creating a new one in the same array slot. Memory leak disappeared with this solution. Try starting the threads in your loop like this: Johannes Johannes 3 7. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

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