Develop Reference

How can I make a layout with multiple fixed views with two of them getting fixed at top with scrolling in Android

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context=".MainActivity">
<RelativeLayout
android:id="#+id/lnrUpper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/lnrUpSide"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#color/purple_200"
android:orientation="vertical" />
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/lnrUpSide"
android:background="#color/white">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appBarLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/white"
android:elevation="0dp">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:fitsSystemWindows="true"
app:layout_constraintEnd_toEndOf="parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="225dp"
android:background="#FFF000" />
</com.google.android.material.appbar.CollapsingToolbarLayout>
<LinearLayout
android:id="#+id/fixedHeader"
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="#color/black"
android:clickable="false"
android:focusable="false">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="FIXED HEADER VIEW"
android:textColor="#color/white"
android:textSize="24sp" />
</LinearLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/fixedHeader">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="75dp"
android:background="#F0FE">
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#FF0E">
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#color/black">
</LinearLayout>
</LinearLayout>
</com.google.android.material.appbar.CollapsingToolbarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="125dp"
android:background="#color/purple_700">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="SECOND FIXED HEADER VIEW"
android:textColor="#color/white"
android:textSize="24sp" />
</LinearLayout>
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="1200dp"
android:background="#color/teal_700">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</androidx.core.widget.NestedScrollView>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</RelativeLayout>
</RelativeLayout>
This is my layout xml file and this is how it looks.
This is how my layout look in the first place
When I scroll the layout becomes like this.
Scrolled Layout
However, that is not what I want.
This is the layout I want when I scroll it completely
I was only able to take a screenshot from Android Studio because when I start this at phone the SECOND FIXED HEADER VIEW not got fixed at top. I have tried so many ways but I could not find a solution for this issue. Does anyone know how to make this view ?

Hide SearchView in Fragment

I want to hide my Searchview when I scroll in my Fragment. I use a RecyclerView to retrieve my item and scroll them.
My fragment are actually like that:
When I scroll I want it to hide and then when I return to the top, I want it to show.
This is the xml of my Fragment:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context=".stock.StockFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.SearchView
android:id="#+id/search_view"
android:layout_width="341dp"
android:layout_height="34dp"
android:layout_marginLeft="40dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:background="#drawable/search_layout"
android:gravity="center"
app:iconifiedByDefault="false"
app:queryHint="Cerca Articolo">
</androidx.appcompat.widget.SearchView>
</LinearLayout>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="#+id/refresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycleViewStock"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="5dp"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</LinearLayout>
I tried to put it inside the Recycler but doesn't work, help please!

you can use NestedScrollView for scrolling all items.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context=".stock.StockFragment">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<androidx.appcompat.widget.SearchView
android:id="#+id/search_view"
android:layout_width="341dp"
android:layout_height="34dp"
android:layout_marginLeft="40dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:background="#drawable/search_layout"
android:gravity="center"
app:iconifiedByDefault="false"
app:queryHint="Cerca Articolo">
</androidx.appcompat.widget.SearchView>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="#+id/refresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycleViewStock"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="5dp"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</LinearLayout>
After that set recyclerView.setNestedScrollingEnabled(false); in java for proper scrolling.

BottomNavigationView hides some part of the screen at the bottom in my app (Android studio java)

BottomNavigationView hides some part of the view which behinds the screen.
How can I show view above the footer (BottomNavigationView)
I have edited the below and updated the mainactivity.xml file
Also, the xml file which I have added the another xml like below
one of my xml
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="#+id/refresh_layout"
android:layout_width="match_parent"
app:layout_constraintBottom_toTopOf="#id/bottom_navigation"
android:layout_height="match_parent"
android:background="#color/colorPrimary"
tools:ignore="NotSibling,RtlHardcoded">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#null">
/>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
mainactivity.xml
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.drawerlayout.widget.DrawerLayout
android:id="#+id/root_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#null"
tools:ignore="NotSibling,UnknownId">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#null">
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#null"
android:paddingBottom="?attr/actionBarSize"
android:paddingTop="?attr/actionBarSize"/>
<View
android:id="#+id/divider_toolbar"
android:layout_width="match_parent"
android:layout_height="#dimen/stroke"
android:layout_marginTop="?attr/actionBarSize"
android:background="#color/colorPrimary"/>
<FrameLayout
android:id="#+id/footer_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_gravity="bottom"
android:background="#drawable/curved_shape_footer"
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
app:itemBackground="?selectableItemBackgroundBorderless"
app:itemHorizontalTranslationEnabled="false"
app:menu="#menu/bottom_navigation"
app:labelVisibilityMode="unlabeled"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"/>
</FrameLayout>
</...>
</...>
</...>

Use constraints layout and set constraint to your top root view as app:layout_constraintBottom_toTopOf="#id/bottomNavigationView".
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="#+id/refresh_layout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#color/colorPrimary"
tools:ignore="NotSibling,RtlHardcoded"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="#id/bottom_navigation">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#null">
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/bottom_nav_menu" />
</androidx.constraintlayout.widget.ConstraintLayout>

How to make ListView resizable?

Picture 1
Picture 2
How to make ListView resizable?
This ListView is OK.
OK ListView 1 Picture
OK ListView 2 Picture
I have tried all the layouts. That doesn't help.
I have a fragment container:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:background="#color/yellow"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/fragmentsContainer"/>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/white"
app:menu="#menu/menu"
android:id="#+id/bottomNavigation"
android:layout_alignParentBottom="true" />
</RelativeLayout>
OK Layout is Search Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/yellow"
android:id="#+id/searchAndListViewContainer"
android:orientation="vertical">
<SearchView
android:id="#+id/searchView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorOfSearchView" />
<ListView
android:id="#+id/downloadedMusicListView"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
unadabtable Layout :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/relativeLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/darkGreen">
<ListView
android:id="#+id/musicListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
</LinearLayout>
As you see Java Code will change Fragments container's inner content.
Two fragments are almost identical.
What's the problem?

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical" >
<ListView
android:id="#+id/lv"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/tv_footer"
android:layout_below="#+id/tv_header" />
<TextView
android:id="#+id/tv_footer"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="#ff0000"
android:gravity="center"
android:text="Footer" />
<TextView
android:id="#+id/tv_header"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:background="#00ff00"
android:gravity="center"
android:orientation="vertical"
android:text="Header" />
</RelativeLayout>
you can do that in multiple ways. here you can set your own view as header and footer.

android - collapsing toolbar and fragment layout not working together

In my app I have two fragments and a MainActivity. The activity_main.xml contains a collapsing toolbar which works perfectly for me when the fragments are empty. In my first fragment I fetch json data from a server and put it into a listview inside the fragment activity. The data is fetched and shown correctly, but the listview takes the whole screen and my collapsing toolbar seems to be a little buggy, like sometimes it pops up and disappears and my listview is not scrollable anymore. The two activities aren’t working together at all. Is there a way to make them work together?
My activity_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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBar"
android:layout_width="match_parent"
android:layout_height="150dp"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:expandedTitleGravity="center|bottom"
app:expandedTitleMarginBottom="56dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<ImageView
android:id="#+id/backg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/backthree"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:layout_marginBottom="48dp"
android:gravity="right"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/navigation"
android:animateLayoutChanges="true">
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:text="TextView" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:textColor="#android:color/white"
android:text="TextView" />
</FrameLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:background="#android:color/white"
app:itemIconTint="#android:color/darker_gray"
app:itemTextColor="#android:color/darker_gray"
app:menu="#menu/navigation" >
</android.support.design.widget.BottomNavigationView>
</android.support.design.widget.CoordinatorLayout>
My fragment_first.xml:
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorGrayHell"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp">
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="#+id/list"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="10dp"
android:layout_width="fill_parent"
android:background="#android:color/white"
android:dividerHeight="10dp"
android:divider="#color/colorGrayHell"
android:layout_height="wrap_content" />
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
</RelativeLayout>

You haven't mentioned where the fragments are attached - I assume within the NestedScrollView? If not, that's where they should go.
The problem is most likely the ListView within the fragment - unlike a RecyclerView, it does not implement NestedScrollingChild2 and ScrollingView, which are required for the collapsing toolbar functionality.
Replace the ListView with a RecyclerView and make sure the fragments are within the NestedScrollView that has app:layout_behavior="#string/appbar_scrolling_view_behavior" and it should work.

<androidx.coordinatorlayout.widget.CoordinatorLayout 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"
android:background="#android:color/background_light"
android:fitsSystemWindows="true">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fcfcfc"
android:gravity="center"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Yogesh" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="300dp"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/main.collapsing"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/main.backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:src="#drawable/bg1"
app:layout_collapseMode="parallax" />
<androidx.appcompat.widget.Toolbar
android:id="#+id/main.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:visibility="gone"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:title="Test"
/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Use this code.
And also you need to change color of tollbar which swutching fragment.
toolbar.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), android.R.color.transparent));
mFragmentToSet = new HomeDashboardFragment();