android - CoordinatorLayout / RelativeLayout issue within a ViewSwitcher -

this follow question of one: coordinator layout , relative layout issue

i have issue when have coordinatorlayout relativelayout within viewswitcher following example:

<?xml version="1.0" encoding="utf-8"?>  <viewswitcher       xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:id="@+id/switcher">      <!--first switcher view / splash screen-->     <relativelayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="@color/coloraccent">     </relativelayout>      <!--second switcher view-->     <android.support.design.widget.coordinatorlayout         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"         android:fitssystemwindows="true"         tools:context="com.example.test">          <android.support.design.widget.appbarlayout             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:theme="@style/apptheme.appbaroverlay">              <android.support.v7.widget.toolbar                 android:id="@+id/toolbar"                 android:layout_width="match_parent"                 android:layout_height="?attr/actionbarsize"                 android:background="?attr/colorprimary"                 app:popuptheme="@style/apptheme.popupoverlay"/>          </android.support.design.widget.appbarlayout>           <!--as @linx64 suggested in previous question-->         <relativelayout             android:layout_width="match_parent"             android:layout_height="wrap_content">              <button                 android:id="@+id/button"                 android:layout_width="match_parent"                 android:layout_height="70dp"                 android:layout_alignparentbottom="true"                 android:background="@color/coloraccent"                 android:focusable="true"                 android:focusableintouchmode="true"                 android:text="text"                 android:textcolor="@android:color/white" />          </relativelayout>           <android.support.design.widget.floatingactionbutton             android:id="@+id/fab"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_gravity="bottom|end"             android:layout_margin="@dimen/fab_margin"             android:src="@android:drawable/ic_dialog_email"/>      </android.support.design.widget.coordinatorlayout> </viewswitcher> 

and in activity:

final viewswitcher switcher = (viewswitcher) findviewbyid(r.id.switcher);  //if use switcher.shownext() activity starts, works fine.  new countdowntimer(1500, 1500) {    @override    public void ontick(long millisuntilfinished) {}     @override    public void onfinish() {        switcher.shownext();    } }.start(); 

result: (screenshot taken moto g android 5.1)

as can see, button isn't @ bottom of screen , it's been cropped.

expected result:

manifest:

<?xml version="1.0" encoding="utf-8"?> <manifest package="com.example.test"           xmlns:android="http://schemas.android.com/apk/res/android">      <application         android:allowbackup="true"         android:icon="@mipmap/ic_launcher"         android:label="@string/app_name"         android:supportsrtl="true"         android:theme="@style/apptheme">         <activity             android:name=".mainactivity"             android:label="@string/app_name"             android:theme="@style/apptheme.noactionbar">             <intent-filter>                 <action android:name="android.intent.action.main"/>                  <category android:name="android.intent.category.launcher"/>             </intent-filter>         </activity>     </application>  </manifest> 

styles

<resources>      <!-- base application theme. -->     <style name="apptheme" parent="theme.appcompat.light.darkactionbar">         <!-- customize theme here. -->         <item name="colorprimary">@color/colorprimary</item>         <item name="colorprimarydark">@color/colorprimarydark</item>         <item name="coloraccent">@color/coloraccent</item>     </style>      <style name="apptheme.noactionbar">         <item name="windowactionbar">false</item>         <item name="windownotitle">true</item>     </style>      <style name="apptheme.appbaroverlay" parent="themeoverlay.appcompat.dark.actionbar"/>      <style name="apptheme.popupoverlay" parent="themeoverlay.appcompat.light"/>  </resources> 

worked me runonuithread(new runnable() after working on

public class mainactivity extends appcompatactivity {      public handler mhandler;     private viewswitcher switcher;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar);         setsupportactionbar(toolbar);          switcher = (viewswitcher) findviewbyid(r.id.switcher);         mhandler = new handler();          runonuithread(new runnable() {              @override             public void run() {                 // todo auto-generated method stub                 try {                     thread.sleep(5000); // every 5 seconds                     mhandler.post(new runnable() {                          @override                         public void run() {                             // todo auto-generated method stub                             switcher.shownext();                         }                     });                 } catch (exception e) {                     // todo: handle exception                 }             }         });      }   } 

and of course, xml:

<!--as @linx64 suggested in previous question-->         <relativelayout             android:layout_width="match_parent"             android:layout_height="wrap_content">              <button                 android:id="@+id/button"                 android:layout_width="match_parent"                 android:layout_height="70dp"                 android:layout_alignparentbottom="true"                 android:background="@color/coloraccent"                 android:focusable="true"                 android:focusableintouchmode="true"                 android:text="text"                 android:textcolor="@android:color/white" />          </relativelayout>