重新启动应用程序时Android堆增长

Question

您好，我已经阅读了与在 android 中增长堆有关的错误

08-13 21:46:22.382: I/dalvikvm-heap(10859): Grow heap (frag case) to 20.578MB for 2400016-byte allocation

下面是我反复退出我的应用程序并一遍又一遍地重新启动它的日志（过滤）。如您所见，每次重新启动时堆都会增长。这个怎么可能？完全退出时不应该清除应用程序堆吗？

如果我对代码进行任何更改并重新启动应用程序，堆将重置为其原始值。这种行为正常吗？

每次我在应用程序中切换活动时，也会发生相同的堆增长。我在andengine中编写了我的应用程序。我得到了高达 80MB 的堆，并且随着堆的增大，加载变得更慢。

I/dalvikvm-heap(13094): Grow heap (frag case) to 13.198MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.354MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.350MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.350MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.406MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.268MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.265MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 13.264MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 14.818MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 14.814MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 14.813MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 14.813MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 16.421MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 16.427MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 16.426MB for 2400016-byte allocation
I/dalvikvm-heap(13094): Grow heap (frag case) to 16.426MB for 2400016-byte allocation
//**-Not A log message: here i simply changed a variables name and restarted**
I/dalvikvm-heap(13497): Grow heap (frag case) to 12.995MB for 2400016-byte allocation
I/dalvikvm-heap(13497): Grow heap (frag case) to 13.002MB for 2400016-byte allocation
I/dalvikvm-heap(13497): Grow heap (frag case) to 13.002MB for 2400016-byte allocation
I/dalvikvm-heap(13497): Grow heap (frag case) to 13.002MB for 2400016-byte allocation

这就像关闭应用程序后保留的内存泄漏，在应用程序中我确实使用 sharedPreferences 来保存东西。但我看不出这如何在这里产生影响。有什么想法吗？

Answer 1

Android 应用程序不会简单地关闭，请参阅这篇关于该主题的精彩博文： http://blog.radioactiveyak.com/2010/05/when-to-include-exit-button-in-android.html

堆增长是因为您的应用程序没有关闭，它只是被隐藏了。尽管如此，您似乎确实有内存泄漏。当您更改变量名称时，堆会缩小，因为会生成新的 apk，手机上的应用程序会被终止并重新安装应用程序。