Hide/show Android toolbar on scrolling -


i trying make app tablayout. have expandable list view in first tab , gridview in other 2 tabs.

tablayout_main.xml

<?xml version="1.0" encoding="utf-8"?> <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:id="@+id/main_content"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".activities.homepageactivity">      <android.support.design.widget.appbarlayout         android:id="@+id/appbar"         android:layout_width="match_parent"         android:layout_height="wrap_content"         >         <!--android:background="#072120"-->         <!--android:background="@drawable/header_copy-->          <android.support.v7.widget.toolbar             android:id="@+id/toolbar"             android:layout_width="match_parent"             android:layout_height="?attr/actionbarsize"             app:titletextcolor="#fffade09"             app:titlemarginstart="100dp"             app:titletextappearance="@style/tablayouttextstyle"             app:layout_scrollflags="scroll|enteralways|snap"             app:popuptheme="@style/apptheme.popupoverlay"             >             <!--android:background="#ff008080"-->          </android.support.v7.widget.toolbar>          <android.support.design.widget.tablayout             android:id="@+id/tabs"             android:layout_width="match_parent"             android:layout_height="wrap_content"             app:tabtextcolor="#fffade09"             app:tabselectedtextcolor="#f7ffffff"             app:tabtextappearance="@style/tablayouttextstyle" />      </android.support.design.widget.appbarlayout>      <android.support.v4.view.viewpager         android:id="@+id/container"         android:layout_width="match_parent"         android:layout_height="match_parent"         app:layout_behavior="@string/appbar_scrolling_view_behavior" />  </android.support.design.widget.coordinatorlayout>

expandablelistview_tab.xml

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".activities.homepageactivity$placeholderfragment">      <imageview         android:id="@+id/homepagebggifimageview"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="@drawable/homepagegif"         android:contentdescription="@string/homepagebgdescriptor" />      <textview         android:id="@+id/textviewwn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparenttop="true"         android:layout_centerhorizontal="true"         android:layout_gravity="center_horizontal|top"         android:paddingtop="30dp"         android:singleline="false"         android:text="@string/welcome_note"         android:textappearance="?android:attr/textappearancemedium"         android:textcolor="#ecec0c"         android:textisselectable="false"         android:textsize="26sp"         android:visibility="visible" />      <expandablelistview         android:id="@+id/listview"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/textviewwn"         android:layout_centerhorizontal="true"         android:layout_gravity="center"         android:groupindicator="@null"         android:padding="20dp" /> </relativelayout>

gridview_tab.xml

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".activities.homepageactivity$placeholderfragment">      <imageview         android:layout_width="match_parent"         android:layout_height="match_parent"         android:id="@+id/shoppingbggifimageview"         android:background="@drawable/homepagegif"         android:contentdescription="@string/homepagebgdescriptor" />      <gridview xmlns:android="http://schemas.android.com/apk/res/android"         android:id="@+id/logogridview"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:numcolumns="auto_fit"         android:stretchmode="columnwidth"         android:horizontalspacing="10dp"         android:verticalspacing="10dp"         android:gravity="center"         android:paddingbottom="@dimen/appbar_padding_top"         android:scrollbars="vertical"         android:scrollbarstyle="outsideoverlay" /> </relativelayout>

now want achieve if expandablelistview or gridview items more fits in screen on scrolling on listview or gridview, toolbar should hide , show if scrolled down toolbar should visible. functionality in whatsapp. if chat tab has more chats toolbar hides on scrolling chats. want same that.


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