java - RecyclerView leaks in FragmentPagerAdapter -


i've figured out in defined concatenation of circumstances recyclerview leads memory leak. archive such effect, have created fragmentpageradapter contains fragment recyclerview child. in case of going application background or finishing, leak canary fires memory leak alert. here's activity class

public class mainactivity extends appcompatactivity {  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar);     setsupportactionbar(toolbar);      viewpager mviewpager = (viewpager) findviewbyid(r.id.view_pager);     list<fragment> fragments = new linkedlist<>();     (int = 0; < 10; i++) {         fragments.add(customfragment.newinstance(i));     }      mviewpager.setadapter(new custompageradapter(getfragmentmanager(), fragments));     mviewpager.setcurrentitem(0, false); }    public class custompageradapter extends fragmentpageradapter {      private list<fragment> fragments;      public custompageradapter(fragmentmanager fragmentmanager, list<fragment> fragments) {         super(fragmentmanager);         this.fragments = fragments;     }      @override     public fragment getitem(int position) {         return fragments.get(position);     }      @override     public int getcount() {         return fragments.size();     }   } }

to leak, recyclerview doesn't need initialized. if comment in xml file, leak isn't fired

public class customfragment extends fragment {  public static final string position = "position";  public static customfragment newinstance(int position) {     bundle b = new bundle();     b.putint(position, position);     customfragment fragment = new customfragment();     fragment.setarguments(b);     return fragment; }  private int position; private recyclerview recyclerview;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     position = getarguments().getint(position); }  @nullable @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {     view v = inflater.inflate(r.layout.fragment_custom, container, false);     textview textview = (textview) v.findviewbyid(r.id.text);     textview.settext("position: "+position);     recyclerview = (recyclerview) v.findviewbyid(r.id.pulse_recyclerview);     return v; }  @override public void ondestroy() {     super.ondestroy();     refwatcher refwatcher = customapplication.getrefwatcher(getactivity());     refwatcher.watch(this);   } }

here's leak trace. recyclerview version 23.1.1

in com.example.gabin.sampleapplication:1.0:1. * leak can ignored. * com.example.gabin.sampleapplication.mainactivity has leaked: * gc root static android.view.inputmethod.inputmethodmanager.sinstance * references android.view.inputmethod.inputmethodmanager.mcurrootview * references com.android.internal.policy.impl.phonewindow$decorview.mcontext * leaks com.example.gabin.sampleapplication.mainactivity instance * retaining: 3,9 КБ. * reference key: 67c5e9f4-464e-40c3-b21d-d802fe64a84b * device: lge google nexus 4 occam * android version: 5.1.1 api: 22 leakcanary: 1.4-beta1 02804f3 * durations: watch=5035ms, gc=190ms, heap dump=5948ms, analysis=46384ms

may android bug? please, give idea how fix leak, or me figure out reason of firing leakcanary.

your stack trace shows @ least 2 things:

  1. it not recyclerview leaks activity. imputmethodmanager.
  2. leak can ignored. according leak canary docs known sdk problem. don't think activity leak. if check memory dump not see several activity instances. code looks pretty safe @ now.

Comments

Post a Comment

Popular posts from this blog

java - pagination of xlsx file to XSSFworkbook using apache POI -

right in code, reading xlsx file, xssfworkbook, , writing database. but, when size of xlsx file increases, causes outofmemory error. can not increase server size, or divide xlsx file pieces. tried loading workbook using file (instead of inputstream), didn't either. i looking way read 10k rows @ time (instead of entire file @ once) , iteratively write workbook , database. is there way apache poi? poi contains called "eventmodel" designed purpose. it's mentioned in faq : the ss eventmodel package api reading excel files without loading whole spreadsheet memory. require more knowledge on part of user, reduces memory consumption more tenfold. based on awt event model in combination sax. if need read-only access, best way it. however, may want double check first if issue somewhere else. check out this item : i think poi using memory! can do? 1 comes quite lot, reason isn't might think. so, first thing check - what's source of prob...
Read more

Unlimited choices in BASH case statement -

consider simple bash snippet: case $option in 1) image=${options[0]%.tar} ;; 2) image=${options[1]%.tar} ;; 3) image=${options[2]%.tar} ;; 4) image=${options[3]%.tar} ;; *) echo "invalid option" exit 1 esac in real script numbers goes 30. makes pretty long. can somehow specify cases variable? something this: case $option in $i) image=${options[$(($i-1))]%.tar} any pointer appreciated. you can match against multiple patterns in single clause: case $option in 1|2|3: echo "$option one, 2 or three" ;; esac if still typing you, can use simple pattern matching: case $option in # following matches # - single-digit numbers 0-9 # - two-digit numbers starting either 1 or 2 # - number 30 [0-9]|[12][0-9]|30) image=${options[$(($option-1))]%.tar} ;; *) echo "invalid option" 1>&2 exit 1 esac
Read more

apache - How do I stop my index.php being run twice for every user -

we've got webapp initial html served using apache , php. i noticed index.php being run twice every request. seems caused / effected rewrite rules in our .htaccess - rewritecond %{http_host} ^(www\.|hotels\.)ourdomain\.com$ [nc,or] rewritecond %{server_name} ^(www\.|hotels\.)ourdomain\.com$ [nc] rewriterule (.*) http://ourdomain.com/$1 [r=301] rewriterule ^hotels/([^/]+)/?\??(.*)$ ?d=$1&$2 [qsa] the final rule moving parameter url path query string. i.e. http://ourdomain.com/hotels/vegas?someparam=1 becomes http://ourdomain.com?d=vegas&someparam=1 if go directly query string version index.php run once. if use url redirected, index.php run twice (i'm checking adding error_log('end of index.php') file). so example going http://ourdomain.com/hotels/paris hits file twice http://ourdomain.com?d=paris hits once. i've seen this question , had @ blog mentioned , , can't find empty string url's (i've tried using yslow process). ...
Read more