My fragment contains lots of different views. Some views are already in the XML files like imageview,drawables, etc. and other views get filled with data after a successful response from Retrofit. The XML file also contains a toolbar and progressbar.
When data is coming from the server I want only toolbar and Progressbar to be shown and other content hidden. but the problem is I can't hide the whole view because it contains a toolbar and progress bar itself.
What should I do?
<RelativeLayout 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">
<androidx.appcompat.widget.Toolbar...>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="#+id/swiperefresh_open_post"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/bottom_sec">
<!-- this contains all Content I want to hide this -->
<ScrollView...>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
<!-- this contains content which is fixed at the bottom I also want to hide this -->
<FrameLayout...>
<include layout="#layout/progressbar_item" />
</RelativeLayout>
Just put the views to other places. If you use for example FrameLayout, you can have pretty flat structure, where Toolbar and ProgressBar are on the same hierarchy level as inner FrameLayout which contains the rest of the layout. So you can do something like this:
<FrameLayout
android:id="#+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="56dp" />
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="56dp" >
<!-- Put your layout here -->
</FrameLayout>
<ProgressBar
android:id="#+id/progressbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone" />
</FrameLayout>
and then just call
container.visibility = View.GONE
progressbar.visibility = View.VISIBLE
or
container.visibility = View.VISIBLE
progressbar.visibility = View.GONE
Related
In an Android project, I have an Activity that contains (from top to bottom) a header, a RecyclerView and a RelativeLayout.
Code sample :
<android.support.design.widget.CoordinatorLayout ...>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
...
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
...
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
This is the behaviour I want : the RelativeLayout is "folded" by default, i.e. under the RecyclerView. When the user swipes up, the RelativeLayout expands to use the whole screen, and folded again when swipes down.
What is the right way to do it ? As I want the RelativeLayout to be BELOW the RecyclerView when folded, and OVER it when expanded. I tried setting the dependencies between elements dynamically but couldn't manage to do so.
Thanks for any help or advice on how to organize the activity to get such a behaviour.
EDIT
This is the XML structure :
<CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
</AppBarLayout>
<RecyclerView
android:id="#+id/top_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/app_bar"
android:layout_above="#+id/relativelayout_footer" />
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_alignParentBottom="true">
<TextView ...>
<RecyclerView
android:id="#+id/included_list"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:visibility="gone"/>
</RelativeLayout>
</RelativeLayout>
</CoordinatorLayout>
And the listener :
top_list.setVisibility(playlistOpened ? View.VISIBLE : View.GONE);
app_bar.setVisibility(playlistOpened ? View.VISIBLE : View.GONE);
included_list.setVisibility(playlistOpened ? View.GONE : View.VISIBLE);
Transition cb = new ChangeBounds();
cb.setDuration(1000);
TransitionManager.beginDelayedTransition(slider, cb);
playlistOpened = ! playlistOpened;
As you see, I switch the visibility of the elements in order to reorganise the view. When the included_list is set to VISIBLE, it pushes up the TextView.
The only problem is that the top_list and the app_bar disappear before being covered by the RelativeLayout. I tried adding a Listener to the Transition and do these when the transition ends, but it doesn't work (I guess because they're not set to GONE at the beginning, so the RelativeLayout can't move up). Any idea of how to do so ? Maybe I should open another question for it ?
Okay, a final attempt. I am back to RelativeLayout and added another one around the RecyclerView to fix its scrolling problem. However, transitions get tricky (and the listener complicated) then. In order to prevent the RecyclerView from popping away before the RelativeLayout with the TextView inside fully covers the latter, I had to include a fading transition to the RecyclerView, too. Hope this suits you.
XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.design.widget.AppBarLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:id="#+id/rlwithrecyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/rlwithtextview"
android:layout_alignParentTop="true">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/rlwithtextview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<TextView
android:layout_width="match_parent"
android:layout_height="400dp"
android:id="#+id/textview"
android:text="Just a test" />
</RelativeLayout>
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
onClick():
#Override
public void onClick(View v) {
RelativeLayout rlWithRecyclerView = findViewById(R.id.rlwithrecyclerview);
RelativeLayout.LayoutParams layoutParamsRlWithRecyclerView;
RelativeLayout rlWithTextView = findViewById(R.id.rlwithtextview);
RelativeLayout.LayoutParams layoutParamsRlWithTextView;
if (rlWithTextView.getLayoutParams().height == MATCH_PARENT) {
layoutParamsRlWithTextView = new RelativeLayout.LayoutParams(MATCH_PARENT, WRAP_CONTENT);
layoutParamsRlWithRecyclerView = new RelativeLayout.LayoutParams(MATCH_PARENT, WRAP_CONTENT);
layoutParamsRlWithRecyclerView.addRule(RelativeLayout.ALIGN_PARENT_TOP);
layoutParamsRlWithRecyclerView.addRule(RelativeLayout.ABOVE, R.id.rlwithtextview);
} else {
layoutParamsRlWithRecyclerView = new RelativeLayout.LayoutParams(MATCH_PARENT, 0);
layoutParamsRlWithTextView = new RelativeLayout.LayoutParams(MATCH_PARENT, MATCH_PARENT);
}
layoutParamsRlWithTextView.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
Transition changeBounds = new AutoTransition();
changeBounds.setDuration(500);
TransitionManager.beginDelayedTransition(rlWithRecyclerView, changeBounds);
TransitionManager.beginDelayedTransition(rlWithTextView, changeBounds);
rlWithRecyclerView.setLayoutParams(layoutParamsRlWithRecyclerView);
rlWithTextView.setLayoutParams(layoutParamsRlWithTextView);
}
Although I got credit for the two other answers, I will eventually delete them, since they don't solve the problem.
the question tag may be familiar in stackoverflow but I have some situation here. I want to achieve that my app will have a bottom menu bar which will be visible across the application. So I added a view and set it on my base activity Like following
#Override
public void setContentView(int layoutResID) {
fullLayout = (RelativeLayout) getLayoutInflater().inflate(R.layout.activity_base, null);
configureToolbar(fullLayout);
subActivityContent = (FrameLayout) fullLayout.findViewById(R.id.content_frame);
getLayoutInflater().inflate(layoutResID, subActivityContent, true);
super.setContentView(fullLayout);
}
Previously it was like:
#Override
public void setContentView(int layoutResID) {
View view = getLayoutInflater().inflate(layoutResID, null);
configureToolbar(view);
super.setContentView(view);
}
Now on some page there is data-binding. Which is called like following:
viewModel = new MyViewModel(someId, someName, false, emptyString);
binding = DataBindingUtil.setContentView(this, R.layout.activity_my_layout);
binding.setItem(viewModel);
Now I am getting error on 2nd line.
Here is my activity layouts. 1st one is common layout which is activity_base, 2nd one is data binding Layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent">
<include android:id="#+id/app_bar" layout="#layout/app_bar" />
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<com.roughike.bottombar.BottomBar
android:id="#+id/bottomBar"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
app:bb_tabXmlResource="#xml/bottombar_tabs" />
2nd layout:
<layout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:map="http://schemas.android.com/apk/res-auto">
<data>
<import type="android.view.View" />
<variable
name="item"
type="io.ppp.views.someActivity" />
</data>
<RelativeLayout
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/root_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="io.ppp.views.someActivity">
<include android:id="#+id/app_bar" layout="#layout/app_bar" />
<!--<include layout="#layout/activity_base" />-->
<WebView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/webViewLoader"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<RelativeLayout
android:id="#+id/progress_indicator"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="false"
android:layout_centerInParent="true"
android:visibility="#{item.loading ? View.VISIBLE : View.GONE}">
<ProgressBar
android:id="#+id/search_progress"
style="#style/Base.Widget.AppCompat.ProgressBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:indeterminate="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_marginTop="50dp"
android:text="#{item.loadingText}"
android:textAppearance="?android:attr/textAppearanceSmall" />
</RelativeLayout>
</RelativeLayout>
I don't think this is a good solution to implement a bottom navigation bar across your application since you are creating Activities, and it will be clear to the user that every time you change activity the screen will totally swap (bottom bar included) instead of keeping a fixed element in the bottom of the screen which the user will use to guide himself across the application.
Implementing Bottom Navigation in Android is much trickier than it is in iOS since you are going to have to work with ONE SINGLE Activity and Fragments(Lots of them if you have a lot of screens) to achieve a smooth bottom navigation like application.
My advice to you is to transform your activities into fragments, implement the bottom navigation Activity with the bottom bar and a fragment container, and go from there.
From API 25 it was introduced the BottomNavigationView which will make your life easier and you won't need to use BottomBar library from GitHub. I also advice to look at AHBottomNavigation, it seems to me more complete than the native one, gives you a better control and choices over your bottom bar.
I'm working on an android app and am using a toolbar at the top of the screen and a navigation bar at the bottom of the screen. I'm using a single activity to create the top and bottom toolbars and fragments to change the content between the toolbars. However, when the contents in the fragment go beyond the size of the screen, the bottom bar disappears.
Here is my home activity xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_home"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.rentables.testcenter.HomeActivity">
<include
android:id="#+id/toolbar_main"
layout="#layout/toolbar_main"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<fragment android:name="com.rentables.testcenter.HomeFragment"
android:id="#+id/fragment_place"
android:layout_weight="0"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:layout="#layout/fragment_home" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="bottom">
<include
android:id="#+id/toolbar_navigate"
layout="#layout/toolbar_navigate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center|bottom"/>
</LinearLayout>
</LinearLayout>
Im guessing it's because of the inner linear layout I have, but I wasn't sure how else to get the nav bar to stay static at the bottom. Any help would be awesome. Thanks
Figured it out. I just changed the whole thing to a relative layout, got rid of the inner linear layout, and instead of gravity I used alignParentBottom="true".
I have a custom View within the NavigationView. The problem is no matter in what combination, fitsSystemWindows is not working within the NavigationView. and the top item in the drawer always stays behind the transcludent statusbar.
main_layout
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#color/colorPrimaryBottomBar"
android:fitsSystemWindows="true">
<include layout="#layout/navigation_main_drawer" />
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
navigation_main_drawer
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="false"
android:fillViewport="true"
android:fitsSystemWindows="true"
android:paddingBottom="#dimen/default_margin">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/default_margin"
android:fitsSystemWindows="true"
android:orientation="vertical">
<LinearLayout
...
</LinearLayout>
<View
... />
<LinearLayout
...
</LinearLayout>
<View
... />
<LinearLayout
...
</LinearLayout>
<View
... />
</LinearLayout>
</ScrollView>
</android.support.design.widget.CoordinatorLayout>
So, if I've understood correctly, you want your custom view to get the necessary padding so that its contents are not clipped by the status bar right?
If that's the case then you need to set
android:fitsSystemWindows="true"
in your root DrawerLayout, and then set
android:fitsSystemWindows="false"
in your NavigationView component. Note that's false, not true :)
REASONING:
The new NavigationView component designed by Google uses the 'fitsSystemWindows' property to customize how its content relates to the status bar. Note that "customize" here is the key word, because the hardcoded behaviour for this particular component is that its contents should overlap the status bar and reach the top of the screen, while the status bar itself should be transparent to allow the drawer's content to be seen through it. This is specified as part of the new Material Design, as can be seen in https://material.io/guidelines/patterns/navigation-drawer.html.
So, the only way to disable this behaviour is to tell the NavigationView to not signal the fitsSystemWindow property, and only set this in the root DrawerLayout that contains all other views, which will do what you would expect and pad all its children views appropriately.
Note that this reasoning is confirmed also by this comment from Android developer Ian Lake in a blog post talking about this specific property.
P.S.
I would also remove all mentions to the 'fitsSystemWindows' property in all the child elements in your navigation_main_drawer XML, just in case, although it probably does have no effect whatsoever as it is..
I want to achieve something like that. (not the FAB or the Snackbar). How can i create a layout, overlaying the AppBarLayout? Like this! (For Example)
Like Play Store:
My AppBarLayout with CoordinatorLayout and NestedScrollView with RelativeLayout as content looks like this:
<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/rootLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="#dimen/_118sdp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbarLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="#color/mpc_pink"
app:expandedTitleMarginStart="#dimen/_40sdp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<de.mypostcardstore.widgets.ItemImageView
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#color/mpc_pink"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.7" />
<android.support.v7.widget.Toolbar
android:id="#+id/article_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:minHeight="?attr/actionBarSize"
app:contentScrim="#color/mpc_pink"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?android:colorBackground"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_width="match_parent".....>
It would be awesome if someone could help me out. I can not find anything on the internet...
Thanks in advance!
Just add something like
app:behavior_overlapTop="64dp"
to your NestedScrollView and it will be placed above the expanded toolbar.
In addition, you should add something like
app:expandedTitleMarginBottom="70dp"
to your CollapsingToolbarLayout so the title does not appear under your overlaid scroll content.
It's quite simple, really. You could achieve that by using a combination of ToolBar, FrameLayout, and your content view (could be a ListView like your first example, or anything).
The idea is to make your FrameLayout possess the same color as your ToolBar, giving the illusion of ToolBar being much larger than it is. Then all that is left to do is to make your content view be the last (or in API 21 and above: possess the highest elevation attribute) so that it would appear as if it floats above the aforementioned FrameLayout.
See my illustration below:
Now that you got the big idea, below is some real live XML snippet for doing such thing. (I actually use this layout in one of my apps) :
<!-- Somewhere in your layout.xml -->
....
<android.support.v7.widget.Toolbar
android:id="#+id/tb_toolbar"
android:layout_width="match_parent"
android:layout_height="#dimen/abc_action_bar_default_height_material"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
app:contentInsetStart="72dp"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<!-- This is the 'faux' ToolBar I've been telling you about. This is the part that will be overlaid by the content view below. -->
<FrameLayout
android:id="#+id/v_toolbar_extension"
android:layout_width="match_parent"
android:layout_height="64dp"
android:layout_below="#+id/tb_toolbar"
android:background="?attr/colorPrimary"
android:elevation="2dp"/>
<!-- Normally, I use this FrameLayout as a base for inflating my fragments. You could just use put your content view here. -->
<FrameLayout
android:id="#+id/ly_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/tb_toolbar"
android:elevation="3dp"/>
....
Note that my ly_content has higher elevation value than that of v_toolbar_extension. This is what will give you that desired 'overlaid toolbar' effect.
Last but not least, you would want to add this line somewhere in your activity's onCreate() :
/* Assuming mToolbar exists as a reference to your ToolBar in XML. */
setSupportActionBar(mTbToolbar);
getSupportActionBar().setElevation(0);
What that codes woud do is to set your ToolBar elevation to zero; removing preset shadows that were given as a default to ToolBars. If you don't do this, said shadow will create a "seam" between your ToolBar and your FrameLayout, thus breaking the illusion of those two being the same.
p.s., It is also important to give your content view a padding on each side. Doing so, your content view will not cover the entire width of the screen (which would render this effect useless).
Note: I see some good answers here that mentioned the absence of FrameLayout and instead making the ToolBar taller. While in theory it might work as well as my proposed solution, you might have problems when trying to manipulate scrolling; by doing that, you won't be able to separate ToolBar and its extension. You'll be forced to either make the Toolbar static or scroll all of the ToolBar altogether (makes scrolling a bit weird).
Add to that, the fact that you can't easily assign a custom drawable into a Toolbar. Hence makes it hard to follow the Google Play example you've given above. While if you're using my solution, all you'd need to do is just make your Toolbar transparent and assign the drawable to the FrameLayout instead.
I had a similar requirement and I achieved it as below.
Your activity theme should extend Theme.AppCompat.Light.NoActionBar.
I created a Layout XML File as:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_main"
android:layout_width="match_parent"
android:layout_height="#dimen/action_bar_size_x2"
android:background="#color/colorPrimary"
android:minHeight="?attr/actionBarSize" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="#dimen/action_bar_size"
android:orientation="vertical" >
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="#string/app_name"
android:textSize="24sp" />
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
And the Activity should be something like this:
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar maintoolbar = (Toolbar) findViewById(R.id.toolbar_main);
setSupportActionBar(maintoolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
}
I got a view like this :
I did try to implement effects like you referred which is called Card Toolbar in Android, and it did work as expected. Here is my layout, Take a look at it:
<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"
android:background="#color/background_material_light" >
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="#dimen/toolbar_double_height"
android:background="?attr/colorPrimary" />
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="#dimen/cardview_toolbar_spacer"
android:layout_marginRight="#dimen/cardview_toolbar_spacer"
android:layout_marginTop="?attr/actionBarSize"
app:cardBackgroundColor="#android:color/white">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:alpha="0.12"
android:background="#android:color/black" />
</LinearLayout>
</android.support.v7.widget.CardView>
</FrameLayout>
Hope you'll be inspired.