I have an activity using an xml layout where a WebView is embedded. I am not using the WebView in my activity code at all, all it does is sitting there in my xml layout and being visible.
Now, when I finish the activity, I find that my activity is not being cleared from memory. (I check via hprof dump). The activity is entirely cleared though if I remove the WebView from the xml layout.
I already tried a
webView.destroy();
webView = null;
in onDestroy() of my activity, but that doesn't help much.
In my hprof dump, my activity (named 'Browser') has the following remaining GC roots (after having called destroy()
on it):
com.myapp.android.activity.browser.Browser
- mContext of android.webkit.JWebCoreJavaBridge
- sJavaBridge of android.webkit.BrowserFrame [Class]
- mContext of android.webkit.PluginManager
- mInstance of android.webkit.PluginManager [Class]
I found that another developer has experienced similar thing, see the reply of Filipe Abrantes on:
http://www.curious-creature.org/2008/12/18/avoid-memory-leaks-on-android/
Indeed a very interesting post.
Recently I had a very hard time
troubleshooting a memory leak on my
Android app. In the end it turned out
that my xml layout included a WebView
component that, even if not used, was
preventing the memory from being
g-collected after screen rotations/app
restart… is this a bug of the current
implementation, or is there something
specific that one needs to do when
using WebViews
Now, unfortunately there has been no reply on the blog or the mailing list about this question yet. Therefore I am wondering, is that a bug in the SDK (maybe similar to the MapView bug as reported http://code.google.com/p/android/issues/detail?id=2181) or how to get the activity entirely off the memory with a webview embedded?
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