Memory leak caused by java.lang.ref.FinalizerReference
android, java
Solution
I had these symptoms in my application and it turned out to be related to a memory leak. I used to register a callback from an activity to a singleton object. Destruction of the activity was pending on that of callback.
Problem
when launch com.android.gallery3d and press back key for about 2000 times i got exception of java.lang.OutOfMemoryError. Dump heap of com.android.gallery3d which is in android 4.0.4.Use MAT to analyse and found java.lang.ref.FinalizerReference was nested called. What could cause this nested called? ``` android.app.ContextImpl @ 0x418f8c98 android.media.AudioManager @ 0x419495c8 android.media.AudioManager$1 @ 0x41949688 java.lang.ref.FinalizerReference @ 0x419496a8 java.lang.ref.FinalizerReference @ 0x419496e8 java.lang.ref.FinalizerReference @ 0x41949800 java.lang.ref.FinalizerReference @ 0x41949848 java.lang.ref.FinalizerReference @ 0x41949890 java.lang.ref.FinalizerReference @ 0x419498d8 java.lang.ref.FinalizerReference @ 0x41949920 java.lang.ref.FinalizerReference @ 0x419499b0 java.lang.ref.FinalizerReference @ 0x419499f8 java.lang.ref.FinalizerReference @ 0x41949a40 java.lang.ref.FinalizerReference @ 0x41949a88 java.lang.ref.FinalizerReference @ 0x41949ad0 java.lang.ref.FinalizerReference @ 0x4194a5a8 java.lang.ref.FinalizerReference @ 0x4194af48 java.lang.ref.FinalizerReference @ 0x4194b878 ```