How to add elements dynamically in fragment in android -

i have fragment, , want add elements (textview, button) dynamically when click on floating action button.

code:

@override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     // inflate layout fragment     view view = inflater.inflate(r.layout.xyz, container, false);      floatingactionbutton fab = (floatingactionbutton) view.findviewbyid(r.id.fab);     fab.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view view) {              // new elements on click                // new elements on click          }     });     return view; } 

try xml code fragment

<?xml version="1.0" encoding="utf-8"?> <framelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent">      <linearlayout         android:id="@+id/linearlayout"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:orientation="vertical"/>      <android.support.design.widget.floatingactionbutton         android:id="@+id/fab"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="end|bottom"         android:layout_margin="10dp"         app:srccompat="@android:drawable/ic_dialog_email"/> </framelayout> 

and java code fragment

 package com.example.androiddeveloper.fragmentdynamic;       import android.os.bundle;     import android.support.annotation.nullable;     import android.support.design.widget.floatingactionbutton;     import android.support.design.widget.snackbar;     import android.support.v4.app.fragment;     import android.view.layoutinflater;     import android.view.view;     import android.view.viewgroup;     import android.widget.button;     import android.widget.linearlayout;       /**      * simple {@link fragment} subclass.      */     public class blankfragment extends fragment {          private linearlayout linearlayout = null;          public blankfragment() {             // required empty public constructor         }           @override         public view oncreateview(layoutinflater inflater, viewgroup container,                                  bundle savedinstancestate) {             // inflate layout fragment             return inflater.inflate(r.layout.fragment_blank2, container, false);         }          @override         public void onviewcreated(view view, @nullable bundle savedinstancestate) {             super.onviewcreated(view, savedinstancestate);             linearlayout = (linearlayout) view.findviewbyid(r.id.linearlayout);              floatingactionbutton fab = (floatingactionbutton)view.findviewbyid(r.id.fab);             fab.setonclicklistener(new view.onclicklistener() {                 @override                 public void onclick(view view) { //create controls(ui widget, button,textview) , add layout                     button btn = new button(getactivity());                     btn.settext("manual add");                     btn.setlayoutparams(new linearlayout.layoutparams(linearlayout.layoutparams.match_parent, linearlayout.layoutparams.wrap_content));                     linearlayout.addview(btn);                 }             });           }     }