Develop Reference

How to change the status bar color at Material3 theme when scrolling？

I'm a beginner Android develpoer, and my native language is no English. Please forgive me if I am wrong.
I am developing a simple application using Material Design 3 theme. I want to change the defaule toolbar color, but the status bar color doesn't change with the color I set to toolbar.
When I ccrolling the window, it's someting like this.
the status bar color doesn't change
The code is :
themes.xml
<style name="Theme.SodaMusic" parent="Theme.Material3.DayNight.NoActionBar">
....
<item name="android:statusBarColor">#android:color/transparent</item>
</style>
activity_main.xml
<androidx.drawerlayout.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<com.google.android.material.appbar.MaterialToolbar
android:id="#+id/topAppBar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorSurface"
android:elevation="0dp"
app:menu="#menu/top_app_bar"
app:navigationIcon="#drawable/ic_menu"
app:titleCentered="true"
app:titleTextAppearance="?attr/textAppearanceTitleMedium" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.fragment.app.FragmentContainerView
android:id="#+id/main_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
...
</androidx.drawerlayout.widget.DrawerLayout>

Collapsing toolbar with TabLayout not showing Toolbar

I am trying to make collapsing toolbar with TabLayout as follows
https://i.stack.imgur.com/76m5h.gif
but my result is like this
as you can see the toolbar is not showing at all.
in java I am setting toolbar as actionbar using
setSupportActionBar(toolbar);
I tried many so answers and other sites but not able to solve my problem.
below is the xml I am using.
<?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:orientation="vertical"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/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>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/bg_main"
android:orientation="vertical">
<com.gigamole.navigationtabstrip.NavigationTabStrip
android:id="#+id/nts_strip"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_gravity="top"
android:background="#color/colorPrimary"
app:layout_collapseMode="parallax"
app:nts_active_color="#color/white"
app:nts_animation_duration="300"
app:nts_color="#color/white"
app:nts_corners_radius="1.5dp"
app:nts_inactive_color="#color/white_transparent"
app:nts_titles="#array/nts_titles" />
<android.support.v4.view.ViewPager
android:id="#+id/pager_photos"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#color/white_transparent" />
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
here is the styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
</resources>
Please let me know if you need anything else.

CoordinatorLayout is a FrameLayout, thus the last view in order overlaps the first ones.
Add app:layout_behavior="#string/appbar_scrolling_view_behavior" to LinearLayout to anchor it to the bottom of AppBarLayout.

you can do this with default android tabbed activity from gallery. For this right clickon package where you want to create->click on new navigate to gallery->choose Tabbed activity -> in the window choose Navigation style as Action bar tabs(with viewpager)

ImageView not going behind the status bar in collapsing toolbar

I am trying to bring the image view behind the status bar in collapsing toolbar and have tried many solutions, it goes behind the status bar but in the stating it starts below the status bar, but on scrolling it goes behind. How can I fix this, here is the xml file(it is a fragment inside an activity)
FRAGMENT 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/fragment_detail_app_bar_layout"
android:layout_width="match_parent"
android:layout_height="240dp"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/fragment_detail_collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:statusBarScrim="#android:color/transparent"
app:theme="#style/Theme.AppCompat.NoActionBar">
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/fragment_detail_collapsing_toolbar_image_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"/>
<android.support.v7.widget.Toolbar
android:id="#+id/fragment_detail_toolbar"
android:layout_width="match_parent"
android:layout_height="120dp"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:titleTextColor="#android:color/white">
</android.support.v7.widget.Toolbar>
</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"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/fragment_detail_anchor_image"
android:layout_width="96dp"
android:layout_height="144dp"
android:layout_margin="40dp"
android:background="#android:color/white"
app:layout_anchor="#id/fragment_detail_app_bar_layout"
app:layout_anchorGravity="bottom"
android:scaleType="fitXY"
android:elevation="8dp"/>
</android.support.design.widget.CoordinatorLayout>
ACTIVITY XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/movie_detail_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="false"
tools:context="app.com.thetechnocafe.moviesnow.MovieDetailActivity">
</android.support.design.widget.CoordinatorLayout>
SCREENSHOT

Got it solved. The image from the network was of a different ratio, one thing i discovered is that if the image don't fit the res to go behind the status bar then it automatically fits under the status bar. All i had to do is set android:scaleY="1.2" in the NetworkImageView to push it into the status bar.

On devices with API 21+ you can use a custom theme that make the status bar translucent.
<style name="AppTheme.NoActionBar.NoStatusBar">
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:statusBarColor">#android:color/transparent</item>
</style>
Add this style to a file within the values-v21 folder and set the Activty theme in your AndroidManifest.xml like this:
<activity
android:name=".activity.AboutActivity"
android:theme="#style/AppTheme.NoActionBar.NoStatusBar" />
And one more thing. I think you need to add android:fitsSystemWindows="true" to the NetworkImageView also.

Hide android ToolBar

I am developing a tabbed application and for some tabs I want to hide the toolbar. I am setting the visibility as gone to accomplish that. Below is my XML file,
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout android:id="#+id/main_content"
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="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:visibility="gone"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_gravity="bottom"
android:background="#color/offwhite"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.design.widget.CoordinatorLayout>
But I am seeing some item still on the top section of the screen. please check the screen shot. Am i doing it correctly? Is there any better way to hide Toolbar.
Thanks.

You can hide the toolbar programmatically using the following code
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setVisibility(View.GONE);`
And if that doesn't fix the problem, try removing from your AppBarLayout,
android:paddingTop="#dimen/appbar_padding_top"
and change your toolbar to this
app:layout_scrollFlags="scroll"
This would fix your problems

To hide the toolbar in your App, just add two lines in your style.xml
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
...
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>

Android toolbar showing shadow when it shouldn't

I'm creating an app and I got my layout defined like this:
<android.support.design.widget.CoordinatorLayout
android:id="#+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize">
<include layout="#layout/toolbar"/>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/content"
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/floating_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="16dp"
app:backgroundTint="#color/primary_green">
</android.support.design.widget.FloatingActionButton>
</android.support.design.widget.CoordinatorLayout>
And toolbar.xml looks like this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
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="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"
app:theme="#style/AppTheme.ToolbarTheme">
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_margin="10dp"
android:src="#drawable/app_logo"/>
</android.support.v7.widget.Toolbar>
And AppTheme.ToolBar theme is defined as:
<style name="AppTheme.ToolbarTheme">
<item name="android:background">#color/primary_white</item>
<item name="android:windowContentOverlay">#null</item>
<item name="android:elevation">0dp</item>
<item name="elevation">0dp</item>
</style>
I've even tried setting the elevation in code, still the toolbar shadow is visible. How can I disable it?

You're getting shadow, because AppBarLayout is giving shadow for Toolbar too.
You should remove elevation also from it.