java - OutOfMemoryException thrown due to ImageCache Memory Leak on Android -

-

so think i've found source of memory leak. based on article: http://android-developers.blogspot.ca/2009/01/avoiding-memory-leaks.html it's bad have static bitmap drawable , set on imageview. because, once set (imageview.setimagebitmap(bitmap)) imageview set callback on bitmap. hence, on rotate, bitmap, since it's static, remains , still contains callback previous imageview, has reference previous activity. hence previous activity not destroyed!

i believe have similar issue, it's not due static variable, singleton imagecache class. imagecache alive while app running , called using getinstance(context context). each bitmap stored in gets set on imageview @ point.

the memory leak: when screen rotated, bitmap, still in memory, has callback previous image view. hence, previous activity not destroyed. don't, however, want recycle , destroy bitmap it's used elsewhere in app. think need remove specific imageview being destroyed bitmaps callback set. how do this? or analysis wrong? appreciate help!

update:

so looks source of problem viewpager in activity. basically, have fragment viewpager i've added header of listview. is, call mlistview.addheaderview(mviewpager); works fine, until rotate screen. once rotate screen notice fragments being leaked. example, start app 3 fragments in viewpager. when rotate, notice original 3 re-created , additional 3 created. not visible user though! previous 3 being held onto in background reason. i'm able see tracking onpause() , oncreate() calls fragment. idea why happening?

here's sample code:

mstatusview = inflater.inflate(             r.layout.header,             (viewgroup) getactivity().findviewbyid(                     r.id.list_header));  mlistview.addheaderview(mstatusview, null /*data*/, false /*isselectable*/); mlistview.setselectionafterheaderview(); .... mheaderpager = (scrollableviewpager) mstatusview.findviewbyid(r.id.header_pager);

in above code, mstatusview entire view, other elements. mheaderpager viewpager within mstatusview.


Comments

Post a Comment

Popular posts from this blog

c# - How Configure Devart dotConnect for SQLite Code First? -

-
can configure following sample code ? when run following code, error : no entity framework provider found ado.net provider invariant name 'devart.data.sqlite' setting in machine.config <system.data> <dbproviderfactories> <add name="dotconnect sqlite" invariant="devart.data.sqlite" description="devart dotconnect sqlite" type="devart.data.sqlite.sqliteproviderfactory, devart.data.sqlite, version=4.6.287.0, culture=neutral, publickeytoken=09af7300eec23701" /> </dbproviderfactories> </system.data> after add below block code in app.config <?xml version="1.0"?> <configuration>   <configsections> <!-- more information on entity framework configuration, visit http://go.microsoft.com/fwlink/?linkid=237468 --> <section name="entityframework" type="system.data.entity.internal.configfile.entityframeworksection, entit...
Read more

java - Copying object fields -

-
what best way of copying classes when need have 2 independent variables? have simple class: public class myclass { boolean = false; string b= "not empty"; } do need make method : assign(myclass data ) { a= data.a; b= data.b; } is there automatic method copy (duplicate) objects in java? do need make method : pretty close. instead of making method, should make constructor. such constructors called copy constructor , , create them this: myclass(myclass data) { = data.a; b = data.b; } and create copy of instance, use constructor this: myclass obj1 = new myclass(); myclass obj2 = new myclass(obj1); copy constructor can tedious : using copy constructor create deep-copy can tedious, when class has mutable fields. in case, assignment create copy of reference, , not object itself. have create copy of fields (if want deep copy). can go recursive. a better way create deep copy serialize , deserialize object. why not use clone()? ...
Read more

c++ - Clear the memory after returning a vector in a function -

-
i have function processes , stores lot of data in , returns results vector of class. amount of data stored in function tremendous , want clear storage memory of function after finished job. necessary (does function automatically clear memory) or should clear memory function? update: vector<customers> process(char* const *filename, vector<int> id) { vector<customers> list_of_customers; (perform actions) return list_of_customers; } variables defined locally within function automatically released @ end of function scope. destructors objects called, should free memory allocated objects (if objects coded correctly). example of such object std::vector . anything you've allocated new must have corresponding delete release storage. try avoid doing own allocation , use raii instead, i.e. containers or smart pointers.
Read more