android - Nested Fragment with backstack Resume -
in application there several fragments in activity , maintaining backstack these fragment. okay, there nested fragment among them. when put backstack , again resume in pressing button, fragment looks overllaping previous content (child fragment). normal view:
this screenshot of overlapping view (when resume fragment):
you can difference second one's text more deep (that means child fragment overlapping)
how can avoid that? code nested fragment:
public class competitiveprogramming extends sherlockprogressfragment implements onchapterselectlistener, onsubchapterselectlistener { view mcontentview; static public list<chapter> chapterlist = new arraylist<chapter>(); private processtask processtask = null; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); this.setretaininstance(true); } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { mcontentview = inflater.inflate( r.layout.competitive_programming_exercise, container, false); return super.oncreateview(inflater, container, savedinstancestate); } @override public void onactivitycreated(bundle savedinstancestate) { super.onactivitycreated(savedinstancestate); setcontentshown(false); setcontentview(mcontentview); processtask = new processtask(); processtask.execute(); } protected class processtask extends asynctask<void, void, void> { @override protected void doinbackground(void... params) { // background task return null; } @override protected void onpostexecute(void result) { super.onpostexecute(result); fragmenttransaction transaction = getchildfragmentmanager() .begintransaction(); if (mcontentview.findviewbyid(r.id.fragment_container) != null) { getchildfragmentmanager().begintransaction() .add(r.id.fragment_container, new chapterslistfragment()).commit(); } else { transaction.add(r.id.category_fragment, new chapterslistfragment()); transaction.add(r.id.sub_category_fragment, new subchapterslistfragment()); transaction.add(r.id.sub_sub_category_fragment, new subsubchapterslistfragment()); } transaction.commit(); setcontentshown(true); } } static protected class chapter { string chaptertitle; list<subchapter> subchapterlist; public chapter(string chaptertitle, list<subchapter> subchapterlist) { this.chaptertitle = chaptertitle; this.subchapterlist = subchapterlist; } } @override public void onchapterselected(int position) { subchapterslistfragment subchapterslistfrag = (subchapterslistfragment) getchildfragmentmanager() .findfragmentbyid(r.id.sub_category_fragment); if (subchapterslistfrag != null) { subchapterslistfrag.updatelist(position); } else { subchapterslistfragment subchapterfragment = new subchapterslistfragment(); bundle args = new bundle(); args.putint(subchapterslistfragment.chapter_position, position); subchapterfragment.setarguments(args); fragmenttransaction transaction = getchildfragmentmanager() .begintransaction(); transaction.replace(r.id.fragment_container, subchapterfragment); // transaction.addtobackstack(null); transaction.commit(); } } @override public void onsubchapterselected(int prev, int position) { subsubchapterslistfragment subsubchapterslistfrag = (subsubchapterslistfragment) getchildfragmentmanager() .findfragmentbyid(r.id.sub_sub_category_fragment); if (subsubchapterslistfrag != null) { subsubchapterslistfrag.updatelist(prev, position); } else { subsubchapterslistfragment subsubchapterfragment = new subsubchapterslistfragment(); bundle args = new bundle(); args.putintarray(subsubchapterslistfragment.positions, new int[]{prev, position}); subsubchapterfragment.setarguments(args); fragmenttransaction transaction = getchildfragmentmanager() .begintransaction(); transaction.replace(r.id.fragment_container, subsubchapterfragment); // transaction.addtobackstack(null); transaction.commit(); } } @override public void onstop() { super.onstop(); if (processtask != null && processtask.getstatus() != asynctask.status.finished) { processtask.cancel(true); } } }
kirill kulakov right. replace instead of add should used. edited code:
public class competitiveprogramming extends sherlockprogressfragment implements onchapterselectlistener, onsubchapterselectlistener { view mcontentview; static public list<chapter> chapterlist = new arraylist<chapter>(); private processtask processtask = null; fragment chapterfragment = null; fragment subchapterfragment = null; fragment subsubchapterfragment = null; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); this.setretaininstance(true); } @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) { mcontentview = inflater.inflate( r.layout.competitive_programming_exercise, container, false); return super.oncreateview(inflater, container, savedinstancestate); } @override public void onactivitycreated(bundle savedinstancestate) { super.onactivitycreated(savedinstancestate); setcontentshown(false); setcontentview(mcontentview); processtask = new processtask(); processtask.execute(); } protected class processtask extends asynctask<void, void, void> { @override protected void doinbackground(void... params) { // background task return null; } @override protected void onpostexecute(void result) { super.onpostexecute(result); fragmenttransaction transaction = getchildfragmentmanager() .begintransaction(); chapterfragment = new chapterslistfragment(); if (mcontentview.findviewbyid(r.id.fragment_container) != null) { transaction.replace(r.id.fragment_container, chapterfragment); } else { subchapterfragment = new subchapterslistfragment(); subsubchapterfragment = new subsubchapterslistfragment(); transaction.replace(r.id.category_fragment, chapterfragment); transaction.replace(r.id.sub_category_fragment, subchapterfragment); transaction.replace(r.id.sub_sub_category_fragment, subsubchapterfragment); } transaction.commit(); setcontentshown(true); } } static protected class chapter { string chaptertitle; list<subchapter> subchapterlist; public chapter(string chaptertitle, list<subchapter> subchapterlist) { this.chaptertitle = chaptertitle; this.subchapterlist = subchapterlist; } } @override public void onchapterselected(int position) { subchapterslistfragment subchapterslistfrag = (subchapterslistfragment) getchildfragmentmanager() .findfragmentbyid(r.id.sub_category_fragment); if (subchapterslistfrag != null) { subchapterslistfrag.updatelist(position); } else { subchapterslistfragment subchapterfragment = new subchapterslistfragment(); bundle args = new bundle(); args.putint(subchapterslistfragment.chapter_position, position); subchapterfragment.setarguments(args); fragmenttransaction transaction = getchildfragmentmanager() .begintransaction(); transaction.replace(r.id.fragment_container, subchapterfragment); // transaction.addtobackstack(null); transaction.commit(); } } @override public void onsubchapterselected(int prev, int position) { subsubchapterslistfragment subsubchapterslistfrag = (subsubchapterslistfragment) getchildfragmentmanager() .findfragmentbyid(r.id.sub_sub_category_fragment); if (subsubchapterslistfrag != null) { subsubchapterslistfrag.updatelist(prev, position); } else { subsubchapterslistfragment subsubchapterfragment = new subsubchapterslistfragment(); bundle args = new bundle(); args.putintarray(subsubchapterslistfragment.positions, new int[]{prev, position}); subsubchapterfragment.setarguments(args); fragmenttransaction transaction = getchildfragmentmanager() .begintransaction(); transaction.replace(r.id.fragment_container, subsubchapterfragment); // transaction.addtobackstack(null); transaction.commit(); } } @override public void onstop() { super.onstop(); if (processtask != null && processtask.getstatus() != asynctask.status.finished) { processtask.cancel(true); } } } hope help!
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