Develop Reference

Cover the touch area that is overlapped by another layout

I want to show a layout on top of another layout that is in full screen, but when I touch the laout that in on top (higher translationZ) the view that is behind this layout also get clicked. I want the view that is in behind have touch gesture but I don't want touch gesture when I click the viewholder that is on top.
Also when I use AppBarLayout then there is no problem, but when I use ConstraintLayout, I am not able to fix the problem.
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/clBigScreenPhotoInfo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:translationZ="1dp"
android:visibility="invisible">
<com.google.android.material.appbar.AppBarLayout
android:background="#77000000"
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:elevation="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar_home"
android:layout_width="match_parent"
android:layout_height="72dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/ivBack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_back_white" />
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.constraintlayout.widget.ConstraintLayout
app:elevation="1dp"
android:layout_width="match_parent"
android:layout_height="120dp"
android:background="#77000000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent">
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
<ImageView
android:id="#+id/ivBig"
android:translationZ="0dp"
android:layout_width="match_parent"
android:src="#drawable/big"
android:layout_height="match_parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
click listener of the imageView that is in behind
binding.ivBig.setOnClickListener {
val v = binding.clBigScreenPhotoInfo
if (v.visibility == View.INVISIBLE) {
v.visibility = View.VISIBLE
return
}
v.visibility = View.INVISIBLE
}

Is it possible to detect scroll in a view and scroll a bottomsheet accordingly?

My activity is something like
<androidx.constraintlayout.widget.ConstraintLayout 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.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#E7E7E7"
app:layout_constraintBottom_toTopOf="#+id/dummy"
app:layout_constraintTop_toTopOf="parent">
<include
android:id="#+id/bottomSheet"
layout="#layout/bottom_sheet_persistent" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<View
android:id="#+id/dummy"
android:background="#F44336"
android:layout_width="match_parent"
android:layout_height="80dp"
app:layout_constraintBottom_toBottomOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
And the bottom sheet is as bottom_sheet_persistent.xml
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/bottomSheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:behavior_hideable="false"
app:behavior_peekHeight="80dp"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<View
android:layout_width="match_parent"
android:layout_height="400dp"
android:background="#2196F3"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
The screenshot is
As you can understand from the xml that, the red part is just a static view and blue is the bottomsheet. The bottomsheet also works as expected. What I wanted to achieve is, when the user start scrolls from the static view (Red View), I would like to scroll up the bottomsheet.
Thanks in advance.

RecyclerView scrolls up when items change

When Adapter submit a new list the screen scrolls up. How don't scroll the srcreen when submit a new list?
obs: setHasFixedSize(false)
<androidx.core.widget.NestedScrollView 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:scrollbars="vertical">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/design_default_color_on_primary">
...
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/matchesRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/button1"
tools:itemCount="5"
tools:listitem="#layout/item_match" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>

Weird scrolling behavior and visibility of Persistent or Standard BottomSheet in a page having RecyclerView

As one can see in image, RecyclerView items are visible through Standard/Persistent BottomSheet and collapsing/expanding of BottomSheet is also not happening in Standard/Persistent BottomSheet. RecyclerView items are scrollable but when I do any kind of activity in Standard/Persistent BottomSheet, it directly scrolling the RecyclerView item behind this Standard/Persistent BottomSheet.
Note: Background color used in BottomSheet is solid. It's not transparent.
I'm wondering how to solve this issue?
Here's the code snippet ->
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/layout_container_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="app.standardbottomsheet.ui.MainActivity">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="#+id/layout_container_1"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
tools:context="app.standardbottomsheet.ui.MainActivity">
<include
android:id="#+id/included_layout_standard_bottom_sheet"
layout="#layout/layout_standard_bottom_sheet" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
layout_standard_bottom_sheet.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/layout_container_bottom_sheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/bottom_sheet_behavior">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/summary"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/thumbnail"
android:layout_width="?actionBarSize"
android:layout_height="?actionBarSize"
android:src="#mipmap/ic_launcher"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/app_name"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="#id/thumbnail"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.slider.Slider
android:id="#+id/progress"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/summary" />
</androidx.constraintlayout.widget.ConstraintLayout>

As you can see in the image your bottom sheet is behind the recycler view. To change that you have to change the order of recyclerview and coordinatelayour in your activity_main.xml
You can try by changing the order like this
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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/layout_container_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="app.standardbottomsheet.ui.MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="#+id/layout_container_1"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
tools:context="app.standardbottomsheet.ui.MainActivity">
<include
android:id="#+id/included_layout_standard_bottom_sheet"
layout="#layout/layout_standard_bottom_sheet" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Since both recycler view and CoordinatorLayout are match_parent, There order decide which is above to another.

Shared Content overlapping Bottom Navigation

My MainActivity's got a RecyclerView and a BottomNavigationView. Items in the RecyclerView are CardViews.
When I click an item that's halfway obscured by the BottomNavigationView (- will call it BNV), it "pops" over the BNV, then slides up to become the header in LaunchedActivity.
When backing out of LaunchedActivity, it slides down, over the BNV, then "snaps" back into place:
How can I either:
Have the shared content appear to slide from underneath the BNV,
or failing that,
Have the shared content start off invisible, and fade as it slides to the header
I've tried playing with the elevation of the BNV, I've tried setting sharedElementEnterTransition to Fade(), I've tried specifying excludeTarget with BottomNavigation; I can't seem to make things work how I'd like.
Here's the layout for MainActivity:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="#+id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
/>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:menu="#menu/navigation"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
/>
</android.support.constraint.ConstraintLayout>
Activity_launched is here:
<?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"
tools:context=".LaunchedActivity">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
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>
<include layout="#layout/content_launched"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
app:srcCompat="#android:drawable/ic_dialog_email"/>
</android.support.design.widget.CoordinatorLayout>
And content_launched:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/activity_launched"
tools:context=".LaunchedActivity">
<LinearLayout
android:id="#+id/launched_header"
android:transitionName="header" android:layout_width="0dp" android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent" app:layout_constraintStart_toStartOf="parent"
android:orientation="vertical" app:layout_constraintEnd_toEndOf="parent"
android:background="#android:color/holo_blue_bright"
android:layout_marginEnd="8dp">
<TextView
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/launched_title"/>
<TextView
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/launched_text"/>
</LinearLayout>
</android.support.constraint.ConstraintLayout>
Items in the RecyclerView call MainActivity.onItemClicked:
fun onItemClicked(view: View, item: Item) {
val intent = Intent(applicationContext, LaunchedActivity::class.java)
intent.putExtra("ITEM", item)
val options = ActivityOptions.makeSceneTransitionAnimation(
this,
android.util.Pair<View, String>(view, "header")
)
startActivity(intent, options.toBundle())
}
This is the array that's in the recycler:
data class Item(val title: String, val text: String): Serializable
val itemList = listOf(Item("One", "1"), Item("Two", "2"),
Item("Three", "3"), Item("Four", "4"), Item("Five", "5"))
Lastly, this is from LaunchedActivity.onCreate:
with(window) {
requestFeature(Window.FEATURE_CONTENT_TRANSITIONS)
requestFeature(Window.FEATURE_ACTIVITY_TRANSITIONS)
sharedElementEnterTransition = AutoTransition()
sharedElementExitTransition = AutoTransition()
}
LaunchedActivity.onCreate pulls the item out of the intent and sets launched_title and launched_text.

Add in recyclerView's item's CardView
app:cardMaxElevation="8dp"
and give your BNV
app:elevation="16dp"
give it a try, try with more difference in elevation as clicked cardview has more elevation than actual elevation

Have you heard of clipToPadding it can add padding to the bottom views so it does not obstruct the bottom views.
So try setting clipToPadding = "true" and check if it solves.
Android what does the clipToPadding Attribute do?
Also your layout activity file has <RecyclerView> set to 0dp.
Use a <RelativeLayout> outside and set layout_above="#bnv" in <RecyclerView> somewhat similar to this.
<?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"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/navigation1"
android:layout_weight="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.nxtoff.plzcome.commonutills.BottomNavigationViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_below="#+id/viewpager"
android:background="#999999" />
</RelativeLayout>
</FrameLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/navigation1"
android:layout_width="match_parent"
android:layout_height="56dp"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
app:itemBackground="#android:color/white"
app:itemIconTint="#drawable/nav_item_colors"
app:itemTextColor="#drawable/nav_item_colors"
app:menu="#menu/navigation" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/xfb_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_gravity="bottom|center_horizontal"
android:layout_margin="22dp"
android:layout_marginBottom="30dp"
android:background="#color/colorloader"
android:clickable="true"
android:src="#drawable/plus_fab"
android:tint="#color/colorviolet"
app:backgroundTint="#color/colorloader"
app:elevation="8dp"
app:fabSize="normal"
/>
</RelativeLayout>
EDIT 1:
Try out this code and let me know.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginTop="8dp"
android:layout_above="#id/bottomNavigationView"
android:layout_alignParentTop="true"
android:layout_marginBottom="8dp"
/>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:menu="#menu/navigation"
android:layout_alignParentBottom="true"
/>
</RelativeLayout>