Develop Reference

Nested Scroll with Recycler View and AppBar

I'd like to achieve the flow like gmail
i've tried this so far
<?xml version="1.0" encoding="utf-8"?>
<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">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/transparent">
<androidx.appcompat.widget.Toolbar
android:id="#+id/story_toolbar"
android:layout_width="match_parent"
android:layout_height="#dimen/measure_50dp"
app:layout_scrollFlags="scroll|enterAlways" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/tv_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/measure_15dp" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Appbar hides while scroll up but doesnt appear on scroll down until its completely scrolled down. I'd like to achieve the flow like gmail, where the recyclerView is match_parent and it appears behind the toolbar when scrolled up, and toolbar hides/unhides on srcroll up and down in a nested scroll view. Any help is appreciated, Thanks!

You have to create nestedScrollview addOnScrollChangedListener like this
float viewScrolled = 0f
nestedScrollview.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver
.OnScrollChangedListener() {
if (viewScrolled < nestedScrollview.getScrollY()) {
viewScrolled = nestedScrollview.getScrollY();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
// Hide your app bar
}
}
if (viewScrolled > nestedScrollview.getScrollY()) {
viewScrolled = nestedScrollview.getScrollY();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (viewScrolled == 0F) {
// Show your app bar
}
}
}
And also refer this link:-https://medium.com/#tonia.tkachuk/appbarlayout-scroll-behavior-with-layout-scrollflags-2eec41b4366b

first item on recyclerview stacked up to tab layout

i already check the xml file, but everything is okay (for me), but the view still stacked up. and i also get an error message like this
PlayingFragment: onResponse: hasil
pemanggilanretrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall#1c95dee5
and here's what inside on onResponse on my PlayingFramgment class
private void bacaData(){
progressBar.setVisibility(View.VISIBLE);
final RecyclerView rvCategory = getActivity().findViewById(R.id.playing_daftar);
rvCategory.setLayoutManager(new LinearLayoutManager(getActivity()));
ApiInterface apiInterface = ApiClient.getRetrofit(getContext()).create(ApiInterface.class);
Call<MovieResponse> call = apiInterface.getNowPlaying();
call.enqueue(new Callback<MovieResponse>() {
#Override
public void onResponse(Call<MovieResponse> call, Response<MovieResponse> response) {
MovieResponse data = response.body();
if (data.getResults().size() == 0){
Toast.makeText(getContext(), "Maaf data yang anda cari tidak ditemukan",
Toast.LENGTH_SHORT).show();
progressBar.setVisibility(View.GONE);
} else {
rvCategory.setAdapter(new MoviesAdapter(data.getResults(), R.layout.list_movie_row, getContext()));
Log.d(TAG, "onResponse: hasil pemanggil" + call);
progressBar.setVisibility(View.GONE);
}
}
#Override
public void onFailure(Call<MovieResponse> call, Throwable t) {
Toast.makeText(getContext(), "Gagal", Toast.LENGTH_SHORT).show();
Log.d(TAG, t.toString());
progressBar.setVisibility(View.GONE);
}
});
}
i post the xml layout fragment_playing
<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"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".fragment.PlayingFragment">
<!-- TODO: Update blank fragment layout -->
<android.support.v7.widget.RecyclerView
android:id="#+id/playing_daftar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<ProgressBar
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/progressMainBar"
android:layout_centerInParent="true"/>
</RelativeLayout>
fragment_playing is the part of fragment_home, and here's the code
<?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="wrap_content"
android:orientation="vertical"
tools:context=".BlankFragment">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|enterAlways"
app:tabGravity="fill"
app:tabIndicatorColor="#color/colorAccent"
app:tabMode="fixed"
app:tabSelectedTextColor="#ffffff">
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/appbar"
android:padding="#dimen/activity_vertical_margin" />
</FrameLayout>
</LinearLayout>
and i put the fragment_home into content_main
<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:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:context=".MainActivity"
tools:showIn="#layout/app_bar_main">
<android.support.v4.view.ViewPager
android:layout_below="#+id/toolbar"
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
content_main is the part of app_bar_main
<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:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<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="wrap_content"
app:popupTheme="#style/AppTheme.PopupOverlay" />
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark"
app:tabTextColor="#color/colorAccent"
app:tabSelectedTextColor="#color/colorAccent"
android:id="#+id/tabs">
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tab_np"
android:text="#string/now_playing"
android:textColor="#color/colorAccent"/>
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/up_coming"
android:id="#+id/tab_up"/>
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
</RelativeLayout>

You should use below property so your viewPager below your upper tab. I think your viewPager have height and width both are match parent.

Since you are using RelativeLayout as root component you have to give margin top to RecyclerView:
android:layout_marginTop="104dp"
EDIT:
if you were using coordinatorLayout as Root layout, the story would be different.
EDIT
Following issues are obvious in your codes:
1- AppBarLayout in Fragment home is extra since you have already an Appbar in activitie's home layout.
2- According to android official document use CoordinatorLayout instead of RelativeLayout. By using RelativeLayout you will loose some functionality and layout management of AppBarLayout
3- Since you have just included content_main inside app_bar_main, no needs to use tools:context=".MainActivity" and tools:showIn="#layout/app_bar_main"
4- Replace RelativeLayout inside content_main by merge tag
After above changes you have just removed extra layouts which may have side effects on margins and padings, then apply attribute below to your view pager. I hope these changes will be effective and no other hidden items are alive in your code:
android:layout_marginTop="104dp"

change you Relativelayout to android.support.design.widget.CoordinatorLayout and add app:layout_behavior="#string/appbar_scrolling_view_behavior" to android.support.v7.widget.RecyclerView

Use this for app_mar_main:
<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:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/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="wrap_content"
app:popupTheme="#style/AppTheme.PopupOverlay" />
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark"
app:tabTextColor="#color/colorAccent"
app:tabSelectedTextColor="#color/colorAccent"
android:id="#+id/tabs">
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tab_np"
android:text="#string/now_playing"
android:textColor="#color/colorAccent"/>
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/up_coming"
android:id="#+id/tab_up"/>
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_below="#+id/appbarlayout"
android:layout_marginTop="1dp"/>
</RelativeLayout>

Try this way..
make viewpager xml code..
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:fitsSystemWindows="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/tab_bg_color"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="#+id/tlConversation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabIndicatorColor="#color/tab_color"
app:tabMinWidth="0dp"
app:tabMode="fixed"
app:tabTextAppearance="#style/Tab_Style"
app:tabSelectedTextColor="#color/tab_color"
app:tabTextColor="#color/tab_text_color">
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="#+id/vpPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white">
</android.support.v4.view.ViewPager>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
after that fragement xml code for recyclerview ..
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tool="http://schemas.android.com/tools">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/rvData"
tool:listitem="#layout/item_row_layout"
></android.support.v7.widget.RecyclerView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tvEmpty"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tool:text="No data found"
android:text="#string/no_found"
android:visibility="gone"
/>
</android.support.constraint.ConstraintLayout>
after that setup view pager like this way make viewpager adapter..
private void setupViewPager(ViewPager viewPager) {
viewPagerAdapter = new ViewPagerAdapter(getActivity().getSupportFragmentManager(),conversationId);
viewPager.setAdapter(viewPagerAdapter);
viewPager.setOffscreenPageLimit(1);
viewPager.setCurrentItem(currentItem);
}
And
public class ViewPagerAdapter extends FragmentPagerAdapter {
private final Context context;
public ViewPagerAdapter(FragmentManager fragmentManager, Context context) {
super(fragmentManager);
this.context = context;
}
#Override
public Fragment getItem(int position) {
if(position == 0) return new ActiveConversationFragment();
if(position == 1) return new InvitedConversationFragment();
if(position == 2) return new RecentConversationFragment();
throw new IllegalStateException("Unexpected position " + position);
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
if(position == 0) return context.getString(R.string.tab_active_conversation_title);
if(position == 1) return getString(R.string.tab_invited_conversation_title);
if(position == 2) return getString(R.string.tab_recent_conversation_title);
throw new IllegalStateException("Unexpected position " + position);
}
}
after that call above method like this way set into tablayout..
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);

Add icon with title in CollapsingToolbarLayout

I am using CoordinatorLayout to get this effect :
Here is the layout code:
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/coordinatorRootLayout"
android:background="#android:color/background_light"
android:fitsSystemWindows="true"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/android_appbar_layout"
android:layout_width="match_parent"
android:layout_height="220dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbarLayoutAndroidExample"
android:layout_width="match_parent"
android:background="#fff"
app:collapsedTitleGravity="left"
app:expandedTitleTextAppearance="#color/card_outline"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:expandedTitleGravity="center_horizontal"
app:contentScrim="?attr/colorPrimary"
app:statusBarScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="32dp"
app:expandedTitleMarginEnd="48dp">
<ImageView
android:id="#+id/parallax_header_imageview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitXY"
android:src="#drawable/orange_triangle"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.8"/>
<ImageView
app:expandedTitleGravity="center_horizontal"
android:id="#+id/someImage"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#drawable/circle"
android:layout_gravity="center_horizontal"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="-1"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_android"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="none"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/nested_scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:id="#+id/linear_layout_android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="15dp"
android:background="#color/off_white"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:orientation="vertical">
<GridView
android:id="#+id/gridview_parallax_header"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
and here is what I am getting as output
How can use an icon with the title text?

You may try the following
Reference for Co-Ordinator Layout
Now inside your MainActivity.java
private void handleToolbarTitleVisibility(float percentage) {
if (percentage >= PERCENTAGE_TO_SHOW_TITLE_AT_TOOLBAR) {
if(!mIsTheTitleVisible) {
startAlphaAnimation(textviewTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
toolbar.setAlpha(0.9f);
toolbar.setBackgroundDrawable(new ColorDrawable(getResources().getColor(R.color.Primary)));
mIsTheTitleVisible = true;
}
}
else {
if (mIsTheTitleVisible) {
startAlphaAnimation(textviewTitle, ALPHA_ANIMATIONS_DURATION, View.INVISIBLE);
toolbar.setBackgroundDrawable(new ColorDrawable(getResources().getColor(android.R.color.transparent)));
mIsTheTitleVisible = false;
}
}
}
Note: Keep the toolbars background transparent when expanded.

You can take reference from this example:-
android ParallaxHeaderViewPager

May be this solve your problem :
You can position the expanded title wherever you want by using these CollapsingToolbarLayout attributes:
app:expandedTitleGravity default is bottom|left -or- bottom|start
app:expandedTitleMargin
app:expandedTitleMarginBottom
app:expandedTitleMarginStart
app:expandedTitleMarginEnd
Code for layout File :
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapse_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true">
<ImageView
android:id="#+id/bgheader"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
android:background="#drawable/sunflowerpic"
app:layout_collapseMode="pin" />
<android.support.v7.widget.Toolbar
android:id="#+id/MyToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
Then in your java file SetTitle:
CollapsingToolbarLayout collapsingToolbar =
(CollapsingToolbarLayout) findViewById(R.id.collapse_toolbar);
collapsingToolbar.setTitle("Title");
Add icon to Top corner :
use app:layout_collapseMode="pin" with ImagView. For e.g.
<ImageView
android:id="#+id/someImage"
android:layout_width="56dp"
android:layout_height="wrap_content"
android:src="#drawable/someDrawable"
android:padding="16dp"
android:layout_gravity="top|end"
app:layout_collapseMode="pin"
/>
Reference to this link Collapsing Toolbar Example

I suggest you to try Childs and dependencies
public boolean onDependentViewChanged(
CoordinatorLayout parent,
CircleImageView avatar,
View dependency) {
modifyAvatarDependingDependencyState(avatar, dependency);
}
private void modifyAvatarDependingDependencyState(
CircleImageView avatar, View dependency) {
// avatar.setY(dependency.getY());
// avatar.setBlahBlat(dependency.blah / blah);
}
http://www.devexchanges.info/2016/03/android-tip-custom-coordinatorlayout.html
CollapsingToolbarLayout with a custom view

In Kotlin
private fun handleToolbarTitleVisibility(percentage: Float) {
if (percentage >= PERCENTAGE_TO_SHOW_TITLE_AT_TOOLBAR) {
if (!mIsTheTitleVisible) {
startAlphaAnimation(textviewTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE)
toolbar.alpha = 0.9f
toolbar.setBackgroundDrawable(ColorDrawable(resources.getColor(R.color.Primary)))
mIsTheTitleVisible = true
}
} else {
if (mIsTheTitleVisible) {
startAlphaAnimation(textviewTitle, ALPHA_ANIMATIONS_DURATION, View.INVISIBLE)
toolbar.setBackgroundDrawable(ColorDrawable(resources.getColor(android.R.color.transparent)))
mIsTheTitleVisible = false
}
}
}

Snackbar and FloatingActionButton bug

I have a FAB button in a Coordinator Layout, and I have set snackbars to pop up in the Coordinator Layout. However if a snackbar is visible and I execute an action that triggers another snackbar while the first one is still visible, the FAB button glitches and falls behind the snackbar. Instead of moving with the snackbar.
I have the Coordinator Layout within a Relative Layout though with an adview below the Coordinator Layout.
This is the layout.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#color/background">
<RelativeLayout
android:id="#+id/circle2"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/container2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/adView"
android:background="#FFF3E0"
tools:context=".MainActivity"
android:orientation="vertical">
<SurfaceView
android:layout_width="0px"
android:layout_height="0px"
android:visibility="gone" />
<include
android:id="#+id/circle"
layout="#layout/periodictablelayout" />
<include
android:id="#+id/toolbar_actionbar"
layout="#layout/toolbar_default"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="#+id/container"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginTop="?android:attr/actionBarSize"
/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/periodbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginEnd="16dp"
android:elevation="3dp"
android:onClick="onClick"
app:layout_anchorGravity="bottom|right|end"
app:layout_anchor="#+id/container2"
android:src="#drawable/ic_view_comfy_white_24dp"
app:backgroundTint="#color/accent"
android:layout_gravity="bottom|end"
app:layout_behavior="ibochemistry.titomo.timetoolay.google.com.ibchemistry.ScrollAwareFABBehaviour" />
</android.support.design.widget.CoordinatorLayout>
<com.google.android.gms.ads.AdView
android:id="#+id/adView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
ads:adSize="BANNER"
ads:adUnitId="#string/banner_ad_unit_id"
app:layout_anchorGravity="bottom" />
</RelativeLayout>
<!-- android:layout_marginTop="?android:attr/actionBarSize"-->
<fragment
android:id="#+id/fragment_drawer"
android:name="ibo.NavigationDrawerFragment"
android:layout_width="#dimen/navigation_drawer_width"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:layout_marginTop="#dimen/abc_action_bar_default_height_material"
app:layout="#layout/fragment_navigation_drawer"
tools:layout="#layout/fragment_navigation_drawer" />

How about moving the FAB up with the snackBar. I guess that will fix your problem. Whenever a snackBar is shown do this ,
SnackbarManager.show(
Snackbar.with(getApplicationContext()) // context
.text("This will do something when dismissed") // text to display
.eventListener(new EventListener() {
#Override
public void onShow(Snackbar snackbar) {
myFloatingActionButton.moveUp(snackbar.getHeight());
}
#Override
public void onShown(Snackbar snackbar) {
Log.i(TAG, String.format("Snackbar shown. Width: %d Height: %d Offset: %d",
snackbar.getWidth(), snackbar.getHeight(),
snackbar.getOffset()));
}
#Override
public void onDismiss(Snackbar snackbar) {
myFloatingActionButton.moveDown(snackbar.getHeight());
}
#Override
public void onDismissed(Snackbar snackbar) {
Log.i(TAG, String.format("Snackbar dismissed. Width: %d Height: %d Offset: %d",
snackbar.getWidth(), snackbar.getHeight(),
snackbar.getOffset()));
}
}) // Snackbar's EventListener
, this); // activity where it is displayed
Let me know if it works for you...

Use,
here view - fabView
Snackbar.make(view, "Hello Snackbar", Snackbar.LENGTH_LONG).show();
this will show fab above snackbar

This issue was fixed in support lib 23.1.0 , just update your dependencies and it will fix it.

Floating Action Button on top of Snackbar. How?

I'm trying to show my FloatingActionButton on top of the SnackBar but I just can't make it as I have done on other screens. My current layout is this one:
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
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:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="#dimen/toolbar_elevation"
android:minHeight="?attr/actionBarSize"
app:popupTheme="#style/AppTheme.ToolbarPopUp"
app:theme="#style/AppTheme.Toolbar"/>
<android.support.design.widget.TabLayout
android:id="#+id/sliding_tabs"
style="#style/Feed.TabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="4dp"/>
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinator_fab"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
style="#style/FloatingActionButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:src="#drawable/ic_start"
app:backgroundTint="#color/h19_green"
app:elevation="6dp"
app:pressedTranslationZ="12dp"/>
</android.support.design.widget.CoordinatorLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/navdrawer"/>
</android.support.v4.widget.DrawerLayout>
And my Snackbar code is this one:
#Override
public void alertNoInternetConnection() {
CoordinatorLayout coordinatorLayout = ButterKnife.findById(getActivity(), R.id.coordinator_fab);
Snackbar.make(coordinatorLayout, R.string.connection_offline, Snackbar.LENGTH_INDEFINITE).show();
}
How should I reorganize my layout so that when I display the Snackbar, the Floating Action Button hovers above it?

I was looking quite long for the answer, and finally I've found the solution which worked for me:
FloatingActionButton must be inside CoordinatorLayout
Snackbar should receive FloatingActionButton as it's View argument
Layout:
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.FloatingActionButton
android:id="#+id/fabAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:src="#mipmap/ic_create_white_48dp"
/>
</android.support.design.widget.CoordinatorLayout>
Code:
FloatingActionButton fabAdd = (FloatingActionButton)findViewById(R.id.fabAdd);
Snackbar.make(fabAdd, "Record was removed.", Snackbar.LENGTH_SHORT).show();

Try adding this to your FAB:
app:layout_anchor="#id/coordinator_fab"
app:layout_anchorGravity="bottom|right"
and remove:
android:layout_gravity="bottom|end"

Your layout implementation is wrong, here's the right implementation (for example):
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
... >
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<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/ThemeOverlay.AppCompat.Light"
app:layout_scrollFlags="scroll|enterAlways"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<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="#dimen/fab_margin"
android:src="#drawable/ic_done" />
</android.support.design.widget.CoordinatorLayout>
<include layout="#layout/navdrawer"/>
</android.support.v4.widget.DrawerLayout>
And then, to show the Snackbar correctly:
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Here's a Snackbar", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});

The problem is that according to the google guidelines you should not display the FAB above the Snackbar you should swipe the FAB and display the Snack bar below it
check this link :
http://www.google.com/design/spec/components/snackbars-toasts.html#snackbars-toasts-usage

this worked for me.
<android.support.design.widget.CoordinatorLayout
android:id="#+id/rootLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<android.support.design.widget.FloatingActionButton
... />
fabBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Snackbar.make(rootLayout, "Hello. I am Snackbar!",
Snackbar.LENGTH_SHORT)
.setAction("Undo", new View.OnClickListener() {
#Override
public void onClick(View v) {
}
})
.show();
}
});