Memory Leak on Andriod - GDG LA July 2016

Transcript

1. Memory Leak on Android Aaron He
2. Out of memory error Fatal Exception: java.lang.OutOfMemoryError Fail to allocate a x byte allocation with y free bytes until OOM
3. Heap
4. Causes of OOM • View pager inception • Bitmaps • Library designed for Java not Android • Or…
5. Memory leak
6. Wait a sec…
7. Not if you are like this cat
8. How memory leaks • The reference to the root outlives the root’s lifecycle. Activity/Context leak Listeners Be aware of anonymous class Android framework
9. Tools to help • Eclipse Memory Analyzer • LeakCanary • Android Studio Memory Monitor
10. Eclipse Memory Analyzer • Dump HPROF in DDMS • Convert it to J2SE format • Start analyzing! OQL
11. LeakCanary • HAHA(Headless Android Heap Analyzer): https:// github.com/square/haha • LeakCanary: https://github.com/square/leakcanary • Customization
12. Demo!
13. Memory Monitor in AS Initiate GC Dump Heap Allocation tracker Memory usage
14. Demo!
15. References • Managing Your App’s Memory: https://developer.android.com/training/ articles/memory.html • Managing Bitmap Memory: https://developer.android.com/training/ displaying-bitmaps/manage-memory.html • Joda Time’s Memory Issue in Android: http://blog.danlew.net/2013/08/20/ joda_time_s_memory_issue_in_android/ • Eclipse Memory Analyzer: http://www.eclipse.org/mat/ • Detect all memory leaks with LeakCanary: https://youtu.be/mU1VcKx8Wzw • Android Studio Memory Monitor: https://developer.android.com/studio/ profile/am-memory.html
16. Thank you! aaronhe42@gmail.com @aaronhe42