Develop Reference

Constraint layout Overlapping Toolbar

im having an issue with layout. I am trying to get the constraint layout to be placed underneath the toolbar. However, it decides it wants to overlap the toolbar. I have tried using app:layout_behavior="#string/appbar_scrolling_view_behavior" with no luck.
The toolbar is creating in another xml file and called in using include.
Activity below
<android.support.v4.widget.DrawerLayout
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:id="#+id/drawer_layout"
android:fitsSystemWindows="true"
tools:context="XXXXXX"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<include
android:id="#+id/test1234"
layout="#layout/app_bar_home"
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:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header"
app:menu="#menu/drawer_menu" />
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toBottomOf="#id/test1234">
**Bunch of constraints here etc**
**Bunch of buttons here**
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.DrawerLayout>
Here is an image of what it looks like
What it should look like
Edit
It is fine when shown in the design view of the android studio. However when opened on a phone or emulator it is still broken.
App still looks like the second image when emulated.
With the fixes below

I faced the same issue then i cracked it with this.
in your constraint layout, write this
android:layout_marginTop="?attr/actionBarSize"

app:layout_behavior="#string/appbar_scrolling_view_behavior
You're implying this attribute to the parent tag. You must add this to the ConstraintLayout or the main content of the drawer layout.

fitsSystemWindows not working in Custom Layout within NavigationView

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..

NavigationView without gray border when using fitsSystemWindows

I created a new App with Android Studio 2.0 and I want to have my Navigation Drawer below the Toolbar. I know the Material Design specs say it should be above the Toolbar but my Drawer won't have that much entries and I want to see the neat icon animation provided by Google.
I maged to get what I want by placing the DrawerLayout within the top level CoordinatorLayout.
<?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"
tools:context="com.company.app.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="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:openDrawer="start">
<include layout="#layout/content_main" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
</android.support.design.widget.CoordinatorLayout>
I am using android:fitsSystemWindow="true" on the top level layout so I can tint the status bar. But when I do that, the Navigation Drawer does have a gray top border.
When I would be using it the way Google specified it (above the Toolbar) then the border would be fine but this way it just looks ugly. Is there any way to remove this?
I experimented with overriding NavigationView.onInsetsChanged(Rect rect) and was able to place the items at the top but the gray border remained.

I had a headache trying to figure this out also and managed to find this which describes how CoordinatorLayout passes fitsSystemWindows to its child. I definitely think this is a bug since NavigationView already has it set to false, but then I read this:
NavigationView takes care of the scrim protection of the status bar for you, ensuring that your NavigationView interacts with the status bar appropriately on API21+ devices.
from the Android Developers Blog. So I'm not sure what to think of it. I think it might be due to the fact that NavigationView was never intended to be used this way.
Nonetheless, here's a solution you can try that fixes the gray bar issue, but I haven't figured out if it might cause anymore problems. If so please post back.
In the activity_main.xml:
<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">
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_marginTop="100dp"
android:fitsSystemWindows="false"/>
</android.support.design.widget.CoordinatorLayout>
In MainActivity class:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
if (navigationView != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
navigationView.setOnApplyWindowInsetsListener(new View.OnApplyWindowInsetsListener() {
#Override
public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {
return insets;
}
});
}
}
}
Should get you this:

How to make the second navigation drawer NOT cover the app bar?

I've been dealing with this DrawerLayout and NavigationViews and I don't seem to ba able to solve this issue. According to google guidelines the first navbar should cover the app bar and the second one should NOT.
How I achieve that? Whatever I do it either makes both of them cover or both of them not cover the app bar.
Since navigation view is pretty new I could not get any suitable answer googling and exploring overflow.com. Any guide, help, tutorial, sample... is highly appreciated.
Thanks before.
Here is my activity.xml
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- As the main content view, the view below consumes the entire
space available using match_parent in both dimensions. -->
<LinearLayout
android:orientation="vertical"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<include
android:id="#+id/app_bar"
layout="#layout/app_bar">
</include>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_draw"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/drawer_header"
app:menu="#menu/drawer"/>
<android.support.design.widget.NavigationView
android:id="#+id/second_nav_draw"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
/>
</android.support.v4.widget.DrawerLayout>

I don't know about NavigationView, but with other views a simple margin used to work. Try:
android:layout_marginTop="?attr/actionBarSize"

Exploring fitsSystemWindows and transparent status bar in android

Kindly assume everything is only for target and minSDK vesion is lollipop only.
What I want
I am trying to implement an activity similar to the following screen from play store.
I am focusing on the Hero image here. As you see,
1. hero image is drawn behind status bar. (Completely transparent. No protection)
2. Rest of the content is drawn below status bar. (Eg., Toolbar/ActionBar)
3. While scrolling the status bar is colored.
What I have done
I have used ScrimInsetsFrameLayout from GoogleIO app. Wrapped my hero image around this layout. Added proper styling in my theme. This is what I get
Help I need
I am still confused about fitsSystemWindows tag. When I set this to "true" on the hero image layout, nothing happens. That is status bar is transparent but image is drawn below status bar. If set to "false", I get the above result. Is there a clear article that explains the usage and behind the scenes of this tag.
I set the "insetForeground" on ScrimInsetFrameLayout to transparent. Also in the theme I set the status bar color as transparent. But still there is a protection over the image. How to make the status bar completely transparent.
Kindly help me with a pointers or demo projects. Also let me know if i am not clear or need more info.

This works for me.
layout.xml
<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:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="#dimen/detail_backdrop_height"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
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/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/parallax_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/fragmentContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
and set statusBarColor attribute with transparent color at styles.xml v-21

Add the following line to the view where you don't want the toolbar to overlap:
app:layout_behavior="#string/appbar_scrolling_view_behavior"