android - How to sort parent items in chronological order from first to oldest like instagram Firebase -


hello stackoverflow have problem ordering items have inside "post" "parent" need items inside parent id generated push method ordered in chronological order

try method: .orderbykey (), read documentation , tells me use method not work

this database example in photo, explained need order my database photo

these methods , references use:

the adapter method:

  private void setupadapter() {     mpostadapter = new firebaserecycleradapter<post, postholder>(             post.class,             r.layout.row_post,             postholder.class,             firebaseutils.getpostref().orderbykey()     ) {         @override         protected void populateviewholder(final postholder viewholder, final post model, int position) {             post mpost = new post();              viewholder.setnumcomments(string.valueof(model.getnumcomments()));             viewholder.setnumlikes(string.valueof(model.getnumlikes()));             viewholder.setnumdislikes(string.valueof(model.getnumdislikes()));             viewholder.settime(dateutils.getrelativetimespanstring(model.gettimecreated()));             viewholder.postownerusernametextview.settext(model.getusername());             if(viewholder.postownerusernametextview == null){                 viewholder.postownerusernametextview.settext("anonymous");             }             viewholder.setposttext(model.getposttext());                   final  storagereference storagereference = firebasestorage.getinstance()                         .getreference(model.getpostimageurl());                   glide.with(getactivity())                         .using(new firebaseimageloader())                         .load(storagereference).into(viewholder.postdisplayimageview); ... remainder of code

i tried 

  mpostadapter = new firebaserecycleradapter<post, postholder>(         post.class,         r.layout.row_post,         postholder.class,         firebaseutils.getpostref().getparent().orderbykey

but doing not receive data rendered in adapter in populate viewholder

the utils:

 public static databasereference getpostref() {      return firebasedatabase.getinstance()             .getreference("posts");   }   public static query getpostquery() {     return getpostref().orderbychild("timecreated");  }  public static databasereference getmypostref() {      return firebasedatabase.getinstance().getreference("myposts")              .child(getcurrentuser().getemail().replace(".", ","));

find solution, difficult ironic easy

set linearlayoutmanager 

 mpostrecyclerview = (recyclerview) mrootview.findviewbyid(r.id.recyclerview_post);     linearlayoutmanager linearlayoutmanager = new linearlayoutmanager(getcontext());     linearlayoutmanager.setreverselayout(true);     linearlayoutmanager.setstackfromend(true);     mpostrecyclerview.setlayoutmanager(linearlayoutmanager);     setupadapter();     mpostrecyclerview.setadapter(mpostadapter);

this all


Comments

Post a Comment

Popular posts from this blog

c# - Update a combobox from a presenter (MVP) -

i using mvp in project, new in mvp. have 2 comboboxes. when select option in combobox, combobox should filled new data. this action in presenter. view 'view1' in presenter, , introduced combobox1 , combobox2 properties in 'view1', because need 'datasource', 'displaymember', 'valuemember' , 'refresh()' in method below. but, when using pattern, enough send property like public string combobox2 { { return combobox1.selectedvalue.tosstring(); } } into presenter not whole combobox. how can solve problem? public void onselectedindexchangedcombobox1() { if (view1.combobox1.selectedindex == -1) { return; } datatable dt = tools.getdatatable("a path"); var query = (from o in dt.asenumerable() o.field<string>("afield") == farmerview.combobox1.selectedvalue.tostring() orderby o.field<string>("anotherfield") select...
Read more

How to understand 2 main() functions after using uftrace to profile the C++ program? -

i trying uftrace profile following simple c++ program: #include <iostream> class { public: a() {std::cout << "a created" << std::endl;} ~a() {std::cout << "a destroyed" << std::endl;} }; int main() { a; return 0; } the profile result this: # uftrace a.out created destroyed # duration tid function 2.026 [ 4828] | __cxa_atexit(); [ 4828] | main() { [ 4828] | __static_initialization_and_destruction_0() { 89.397 [ 4828] | std::ios_base::init::init(); 0.768 [ 4828] | __cxa_atexit(); 93.029 [ 4828] | } /* __static_initialization_and_destruction_0 */ 94.425 [ 4828] | } /* main */ [ 4828] | main() { [ 4828] | a::a() { 11.104 [ 4828] | std::operator <<(); 10.825 [ 4828] | std::basic_ostream::operator <<(); 24.514 [ 4828] | } /* a::a */ [ 4828] | a::~a() { 0.978 [ 4828] | ...
Read more

How to put a lock and transaction on table using spring 4 or above using jdbcTemplate and annotations like @Transactional? -

i trying put lock on table while writing on table , if happened in between roll-back . trying convert below code lock table test_g1 read; lock table test_g write; -- begin; start transaction; insert test_g1 values(143); insert test_g values(145); select * test_g1; select * test_g; rollback; select * test_g; unlock tables; how convert above code @transactional spring jdbctemplate code? @transactional(rollbackfor={dataaccessexception.class}) public void test(){ jdbctemplate.execute("insert test1 (id, nam) values (4, 'a')"); throw new dataaccessexception("error") { }; } here trying throw error, insert statement should rollback it's not happening . thanks edit-1 attaching code , doing in jdbcdaoimpl.java , mentioned problem comment above test() . app.java package com.cgiri.javabrains.spring4; import org.springframework.beans.factory.annotation.autowired; import org.springframework.context.applic...
Read more