android - FirebaseRecyclerAdapter with multiple ViewType ==> Blank screen? -


i'm using firebaserecycleradapter multiple viewtype in current project shows black screen!!?

can me resolve this??

does problem in code or layout ?? or thing else

the problem firebaserecycleradapter found way written can never support multiple view types. true ?

my java code:

private void displaychatmessages() {      recyclerview listofmessages = (recyclerview)findviewbyid(r.id.myrv);     madapter = new firebaserecycleradapter<chatmessage, recyclerview.viewholder>(             chatmessage.class, r.layout.list_item_chat, recyclerview.viewholder.class, firebasedatabase.getinstance().getreference()) {         @override         protected void populateviewholder(final recyclerview.viewholder viewholder, final chatmessage user,                                           final int position) {             switch (user.getmessageuser()) {                 case "test@test.com":                     holderme vh1 = (holderme)viewholder;                     populatetype1(vh1, user, position);                     toaa1("cbn");                     break;                 case "test2@test2.com":                     populatetype2((holderyou) viewholder, user, position);                     break;                 case "3":                     populatetype3((holderdate) viewholder, user, position);                     break;             }         }          @override         public recyclerview.viewholder oncreateviewholder(viewgroup parent, int viewtype) {             switch (viewtype) {                 case 1:                     view usertype1 = layoutinflater.from(parent.getcontext())                             .inflate(r.layout.layout_holder_me, parent, false);                     toaa1("cbn2");                     return new holderme(usertype1);                 case 2:                     view usertype2 = layoutinflater.from(parent.getcontext())                             .inflate(r.layout.layout_holder_you, parent, false);                     return new holderyou(usertype2);                 case 3:                     view usertype3 = layoutinflater.from(parent.getcontext())                             .inflate(r.layout.layout_holder_date, parent, false);                     return new holderdate(usertype3);             }             return super.oncreateviewholder(parent, viewtype);         }          @override         public int getitemviewtype(int position) {             chatmessage user = getitem(position);             switch (user.getmessageuser()) {                 case "test@test.com":                     toaa1("cbn3");                     return 1;                 case "test2@test2.com":                     return 2;                 case "3":                     return 3;             }             return super.getitemviewtype(position);         }          private void populatetype1(holderme v, chatmessage model, int position) {             v.gettimeview().settext(dateformat.format("hh:mm",model.getmessagetime()));             v.gettextv().settext(model.getmessagetext());         }          private void toaa1( string text) {             toast.maketext(chatactivity.this,text,toast.length_long).show();         }         private void  populatetype2(holderyou vv, chatmessage model, int position) {             vv.gettextv().settext(dateformat.format("hh:mm",model.getmessagetime()));             vv.gettimeview().settext(model.getmessagetext());         }         private void populatetype3(holderdate vcv, chatmessage model, int position) {             vcv.getdate().settext(dateformat.format("hh:mm",model.getmessagetime()));         }     };     listofmessages.setadapter(madapter); }

my xml:

xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     app:layout_behavior="@string/appbar_scrolling_view_behavior"     tools:context="com.marxhack.ma153.activitychatnew"     tools:showin="@layout/app_bar_activity_chat_new">      <edittext         android:id="@+id/msginput"         android:layout_width="310dp"         android:layout_height="35dp"         android:layout_marginbottom="8dp"         android:layout_marginleft="8dp"         android:layout_marginright="8dp"         android:layout_margintop="8dp"         android:ems="10"         android:inputtype="textpersonname"         app:layout_constraintbottom_tobottomof="parent"         app:layout_constrainthorizontal_bias="0.17"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"         app:layout_constrainttop_totopof="parent"         app:layout_constraintvertical_bias="0.982"         android:layout_marginstart="8dp"         android:layout_marginend="8dp" />      <android.support.v7.widget.recyclerview         android:id="@+id/myrv"         android:layout_width="358dp"         android:layout_height="450dp"         android:layout_marginbottom="8dp"         android:layout_marginleft="8dp"         android:layout_marginright="8dp"         android:layout_margintop="8dp"         app:layout_constraintbottom_tobottomof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"         app:layout_constrainttop_totopof="parent"         app:layout_constraintvertical_bias="0.0" /> </android.support.constraint.constraintlayout>

edit : problem solved

    .     .     . recyclerview recycler = (recyclerview)findviewbyid(r.id.myrv);         recycler.sethasfixedsize(true);         recycler.setlayoutmanager(new linearlayoutmanager(this));     .     .     .

i working yesterday, , remember layout field variable, seems me must true then. upon closer inspection can see final, can change once initiated.

enter image description here

something take in mind here firebase-ui libraries, of them, meant speed starting project. after while or while dealing more complex cases, have take care of it.

in case, if take @ library classes see bigger advantage switch case use handle child event listener updating data. check out, , maybe pull request can all, luck friend :)


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more