Managing Bitmap Memory. Java - How to discover memory usage of my application in Android. Outofmemoryexception - Android Bitmap Limit - Preventing java.lang.OutOfMemory. Is there a way to have an Android process produce a heap dump on an OutOfMemoryError. Android - Locating and remedying cause of large heap size. Memory Analysis for Android Applications. [This post is by Patrick Dubroy, an Android engineer who writes about programming, usability, and interaction on his personal blog. — Tim Bray] The Dalvik runtime may be garbage-collected, but that doesn't mean you can ignore memory management.
You should be especially mindful of memory usage on mobile devices, where memory is more constrained. In this article, we're going to take a look at some of the memory profiling tools in the Android SDK that can help you trim your application's memory usage. Some memory usage problems are obvious. For example, if your app leaks memory every time the user touches the screen, it will probably trigger an OutOfMemoryError eventually and crash your app. Tools of the trade The Android SDK provides two main ways of profiling the memory usage of an app: the Allocation Tracker tab in DDMS, and heap dumps.
A heap dump is a snapshot of an application's heap, which is stored in a binary format called HPROF. Hprof-conv dump.hprof converted-dump.hprof Conclusion. Coding for performance and avoiding garbage collection in Android – devahead BLOG. Post updates: [December 18th, 2011] added TEST 10: OBJECT POOL You know how much important it is to always keep in mind the performance of your application when developing for mobile devices with limited resources. This is important especially for game developers that need to reach two goals: write high performance codeavoid having the garbage collector work too much because it might have a negative impact on the user experience (you don’t want the users to see small pauses while playing a game) In this post I’m going to show some tests I made for the Android platform.
You can repeat the same tests on your own downloading the test app source code through the link on top of this post. Here is my test environment: Samsung Galaxy S IIAndroid 2.3.3 (Gingerbread)Airplane mode on (to avoid network connections that could affect the test results) The structure of this post is simple. Standard implementation Optimized implementation Test results Conclusion Getter and setter methods Direct access Iterator. Google I/O: Memory Management for Android Apps. May 16, 2011 ⋅ android ⋅ 5 Comments » Though I never made a formal announcement here, some of you may know that I joined the Android team at Google just over a year ago. Last week I had the privilege of speaking at Google I/O in a talk called “Memory Management for Android Applications”: Android apps have more memory available to them than ever before, but are you sure you’re using it wisely? This talk will cover the memory management changes in Gingerbread and Honeycomb (concurrent GC, heap-allocated bitmaps, “largeHeap” option) and explore tools and techniques for profiling the memory usage of Android apps.
You can watch a full video of the talk (including the Q&A) on YouTube: You can also download the slides (PDF). ERRATUM: I’d like to correct one mistake I made in the Q&A, answering a question at 49:33 in the video. Anyways, I had a great time at Google I/O, and met all kinds of developers building cool stuff on Android.