I want to achieve the following behavior -
https://ezgif.com/optimize/ezgif-6-66c61806b01c.gif
here he is my XML file -
<?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/fragment_marketplace_root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="7dp">
<LinearLayout
android:id="#+id/fragment_marketplace_main_linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusableInTouchMode="true"
android:orientation="vertical">
<com.twoverte.views.ClearableAutoCompleteTextView
android:id="#+id/fragment_marketplace_searchview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="14dp"
android:layout_marginTop="15dp"
android:layout_marginEnd="14dp"
android:completionThreshold="0"
android:hint="#string/fragment_marketplace_search_hint"
android:iconifiedByDefault="false"
android:inputType="text|textAutoCorrect"
android:maxLength="25"
android:textIsSelectable="false"
android:textSelectHandle="#xml/empty_shape"
tools:layout_editor_absoluteX="1dp"
tools:layout_editor_absoluteY="1dp" />
<TextView
android:id="#+id/fragment_marketplace_discover_products_from_myverte_textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="14dp"
android:layout_marginTop="15dp"
android:fontFamily="#font/noto_sans"
android:text="#string/fragment_marketplace_discover_products_from_myverte"
android:textSize="17sp" />
<androidx.core.widget.NestedScrollView
android:id="#+id/fragment_marketplace_vendors_nested_scrollview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/fragment_marketplace_vendors_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="14dp"
android:layout_marginEnd="14dp"
android:orientation="horizontal"
tools:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
tools:listitem="#layout/fragment_marketplace_vendor_row_item" />
</androidx.core.widget.NestedScrollView>
<androidx.core.widget.NestedScrollView
android:id="#+id/fragment_marketplace_featured_products_nested_scroll_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/fragment_marketplace_featured_products_textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/very_light_grey"
android:fontFamily="#font/noto_sans"
android:paddingStart="14dp"
android:paddingLeft="14dp"
android:paddingTop="15dp"
android:paddingEnd="14dp"
android:text="#string/fragment_marketplace_featured_products"
android:textSize="17sp"
android:visibility="gone"
tools:visibility="visible" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/fragment_marketplace_products_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="#color/very_light_grey"
app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
tools:listitem="#layout/fragment_marketplace_products_row_item" />
<View
android:id="#+id/activity_product_page_bottom_view"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_marginTop="60dp"
android:background="#color/light_black"
android:visibility="gone"
tools:visibility="visible" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
I have tried SO MANY combinations with setOnScrollChangeListener and addOnScrollListener and nothing works as expected.
The needed result is to have the ability to increase and decrease the top RV up to a cap.
The decrease should be done when scrolling the bottom RV downwards while the increase is being done when scrolling up.
If someone can assist me with this I would literally kiss his legs, I have been investing so many hours trying to crack how to make this behavior that I am sick of it.
edit
the needed animation -
I finally figured it out. I will share the code for the XML file as it is first, then explain everything about it later.
<?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"
xmlns:tools="http://schemas.android.com/tools">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="256dp"
android:minHeight="132dp"
android:fitsSystemWindows="true"
app:titleEnabled="false"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<View
android:id="#+id/blue_view"
android:layout_width="match_parent"
android:layout_height="128dp"
android:background="#android:color/holo_blue_bright"
app:layout_collapseMode="pin"
app:layout_collapseParallaxMultiplier="0"
android:layout_gravity="top"/>
<HorizontalScrollView
android:id="#+id/pink_view"
android:layout_width="match_parent"
android:layout_height="128dp"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="1"
android:layout_gravity="bottom">
<View
android:layout_width="2000dp"
android:minWidth="2000dp"
android:layout_height="match_parent"
android:background="#color/colorAccent"/>
</HorizontalScrollView>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Note: I used View with different colors in order to preview different segments in the Layout. I also used HorizontalScrollView in order to showcase something like a RecyclerView as in the gif you uploaded.
Alright, so first, we need to create a CollapsingToolbarLayout with layout_scrollFlags.
we use scroll flag must be enabled for any scroll effects to take into effect
we use snap flag to determine what to do when a view only has been partially reduced. If scrolling ends and the view size has been reduced to less than 50% of its original, then this view to return to its original size. If the size is greater than 50% of its sized, it will disappear completely.
we use exitUntilCollapsed along with minHeight in order to collapse the Toolbar down to the specified minHeight
We want the CollapsingToolbarLayout to have:
layout_height set to the expanded height of the Toolbar
minHeight set to the collapsed height of the Toolbar
In this case, since we want the HorizontalScrollView (pink_view) only to get smaller in height, we set the minHeight to the [ height of blue_view + smaller height of pink_view ]
Therefore, since blue_view will remain 128dp and we want pink_view to go down to 4dp, we set the minHeight to 132dp.
So here is a small example. Assume the blue_view is like 100dp and the pink_view is initially 100dp. So that's how we want it to show at first, but when I start scrolling we want the pink_view to go down to 20dp and the blue_view will stay at 100dp.
Therefore, layout_height will be 200dp and the minHeight will be 120dp.
Now, we want the HorizontalScrollView or the pink_view to collapse with the CollapsingToolbarLayout height.
So, we add layout_collapseMode="parallax" to the pink_view such that it scrolls along with the CollapsingToolbarLayout.
The layout_collapseParallaxMultiplier determines what part of the image (in percent) will be hidden under the bottom content. And here, we want it all to be hidden. Therefore, we set it to 1.
Meanwhile, we want the blue_view to stay pinned to the top. And we also don't want it to be hidden under any bottom content.
So, we add layout_collapseMode="pin" to the blue_view such that it gets pinned to the top of the CollapsingToolbarLayout.
We also add layout_collapseParallaxMultiplier="0" in order to not have it be hidden under any content.
Please note that if the heights of the elements exceeds the minHeight, the CollapsingToolbarLayout will be pushed above the screen. It will then seem as if the height of the top item (here blue_view) is decreasing in size.
Preview:
Here is another demo with a RecyclerView:
The XML for the above RecyclerView demo is below if anyone is interested.
<?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"
xmlns:tools="http://schemas.android.com/tools">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="256dp"
android:minHeight="148dp"
android:fitsSystemWindows="true"
app:titleEnabled="false"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
<View
android:layout_width="match_parent"
android:layout_height="128dp"
android:background="#android:color/holo_blue_bright"
app:layout_collapseMode="pin"
app:layout_collapseParallaxMultiplier="0"
android:layout_gravity="top"/>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/hv_list"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="128dp"
android:minHeight="20dp"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="1"
android:layout_gravity="bottom"/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Edit : Important thing for RecyclerViews and ViewHolders
To achieve the height resize for RecyclerView and ViewHolder, we have to resize them when the offset of the AppBarLayout changes on scroll.
This is because the CollapsingToolbarLayout just scrolls the elements inside it under each other instead of actually resizing them.
So, we have to use the RecyclerView, called here hv_list, and the AppBarLayout, called here app_bar.
val hv_list: RecyclerView = findViewById(R.id.hv_list)
val app_bar: AppBarLayout = findViewById(R.id.app_bar)
After that, we need to remember the original size of the hv_list.
val hv_original_height: Int = hv_list.layoutParams.height
Finally, we need to set an OffsetChangedListener for the AppBarLayout. There, we will be changing the height of the RecyclerView and then give it a margin bottom to push it up only because it has a gravity bottom.
app_bar.addOnOffsetChangedListener(object : AppBarLayout.OnOffsetChangedListener {
override fun onOffsetChanged(appBarLayout: AppBarLayout, i: Int) {
hv_list.updateLayoutParams {
this.height = hv_original_height + i
(this as CollapsingToolbarLayout.LayoutParams).setMargins(0, 0, 0, abs(i))
}
}
})
Make sure that your itemView in the RecyclerView has height of match_parent
Related
Here is my Persistent BottomSheet
<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/bs"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bottom_sheet_background"
android:elevation="2dp"
android:padding="#dimen/base_margin"
app:behavior_hideable="true"
app:behavior_peekHeight="#dimen/bottom_sheet_peek_height"
app:layout_behavior="#string/bottom_sheet_behavior">
When User scrolls RecycleView, BottomNavigation hides and I reduce height of BottomSheet accordingly in RecycleView's addOnScrollListener using:
binding.rv.addOnScrollListener(new RecyclerView.OnScrollListener() {
//148 = 80(bottom navigation) + 56(bottom sheet)
if (dy < 0)//scroll down
bottomSheetBehavior.setPeekHeight(136, true);
else if (dy > 0)//scroll up
bottomSheetBehavior.setPeekHeight(56, true);
}
After BottomNavigation is hidden and BottomSheet height is reduced, if BottomSheet is clickable,
(either through code binding.bs.bs.setClickable(false); or through xml android:clickable="true")
I can't drag it to expand. If it is not clickable, click event goes through it and user click on RecycleView item underneath it.
Even when its height is not reduced and it isn't clickable then also click event goes under it and fire on RecycleView item.
I also tried setting nestedScrolling, which allowed expanding but after that start creating issues when collapsing. :(
UPDATE:
I noticed BottomSheet drag not works when I set Bottomsheet clickable and its peekheight < 80 dp, ie the height of BottomNavigation.
Reference:
Why am I able to click "behind" the bottomsheet in Android?
I had same use case of having a recycler view inside a bottom sheet and here's what my Bottom sheet XML looks like. Please try to check if this works for you!
Apart from this, I did not actually get it why you want to reduce the height of the bottom sheet, as Bottom sheet has the behavior of self adjusting its height respect to the content inside it.
Please if possible share your use case so that it will be easier for the community to answer which gonna hit the bonsai. Thanks!
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:background="#color/transparent"
android:layout_height="match_parent"
android:paddingTop="50dp"
android:id="#+id/rootLayout"
>
<include
android:id="#+id/progress"
layout="#layout/item_progress_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="#+id/rootView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/bottom_sheet_rounded_background"
android:backgroundTint="#color/background_gray"
android:clipToPadding="true"
android:orientation="vertical"
app:layout_behavior="#string/bottom_sheet_behavior"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<RelativeLayout
android:id="#+id/title_rl"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingVertical="16dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_marginStart="24dp"
android:height="24sp"
android:fontFamily="#font/silka_bold"
android:text="#string/error_select_prescription"
android:textColor="#color/text_color_semi_black"
android:textSize="16sp" />
<ImageView
android:id="#+id/iv_close"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:layout_marginEnd="16dp"
android:src="#drawable/ic_close_btn_gray" />
</RelativeLayout>
<View
android:id="#+id/view"
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/btn_gray"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/title_rl" />
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:fillViewport="true"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerViewPrescription"
android:layout_width="match_parent"
android:layout_height="0dp"
android:paddingTop="#dimen/dimen_16dp"
tools:itemCount="10" />
</androidx.core.widget.NestedScrollView>
<include
android:id="#+id/btn_select_and_proceed"
layout="#layout/sticky_footer_design_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
val bottomSheet = dialog!!.findViewById<View>(R.id.design_bottom_sheet) as FrameLayout
val behavior: BottomSheetBehavior<*> = BottomSheetBehavior.from<View>(bottomSheet)
behavior.state = BottomSheetBehavior.STATE_EXPANDED
These all are the states which you can use to manipulate the height or basically the behavior of the BottomSheet.
The structure of my layout file: Coordinator layout - NestedScrollView - Coordinator Layout - objects that i want to be able to scroll
My TextInputLayout with TextInputEditText is at the bottom of the screen and when filled, extends out of bounds of the screen. When I collapse the keyboard it’s still not scrollable.
Note: I don’t want to set maxLines to Edittext and make it scrollable itself. I want it to scroll with other elements.
However, if I put, for example, TextView at the bottom of the screen and it doesn’t fit, the page is scrollable. Any ideas?
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--other items i want to scroll-->
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/descriptionLayout"
android:layout_width="348dp"
android:layout_height="200dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="545dp"
android:ems="16"
android:fontFamily="#font/montserrat"
android:hint="Add image description (optional)"
android:inputType="textMultiLine|textAutoCorrect"
app:counterEnabled="true"
app:counterMaxLength="256"
app:boxBackgroundColor="#color/white"
app:srcCompat="#drawable/ic_round_cloud_upload_24"
android:textColor="#68B2A0"
android:textColorHint="#68B2A0"
app:hintTextColor="#68B2A0"
app:layout_anchor="#id/titleLayout"
app:boxStrokeErrorColor="#F75010"
app:boxStrokeColor="#68B2A0"
app:boxStrokeWidth="2dp"
app:errorIconTint="#color/error"
app:errorTextColor="#color/error"
app:layout_anchorGravity="center|bottom"
app:counterOverflowTextColor="#color/error"
style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
app:counterTextColor="#color/main_green"
>
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/descriptionTxt"
android:ems="16"
android:textSize="18sp"
android:textColor="#68B2A0"
android:fontFamily="#font/montserrat"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:maxLines="7"
/>
</com.google.android.material.textfield.TextInputLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</androidx.core.widget.NestedScrollView>
<!--bottom app bar-->
</androidx.coordinatorlayout.widget.CoordinatorLayout>
This is because you hard set android:layout_marginTop="545dp". Try never to do that. Also i think use costaint layour in youre case is better. Just change <androidx.coordinatorlayout.widget.CoordinatorLayout> inside nested scroll view to <androidx.constraintlayout.widget.ConstraintLayout> and add this atributes:
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent
If you need to show nested view in fullscteen, just chaange android:layout_height="wrap_content" to android:layout_height="match_parent"
What I'm trying to implement is a Toolbar that is not full width (has a margin on all sides of 16dp) like the following:
Gmail - Please note that the RecyclerView can be seen scrolling behind the toolbar
Google App - Same thing, the cards can be seen behind the toolbar.
Additionally, these toolbars hide when scrolling down and appear when scrolling up.
The content of the toolbar is not what I'm worried about right now.
I'm assuming this is done using a Coordinator Layout so this is the skeleton I have:
Coordinator Layout
AppBarLayout
Toolbar
NestedScrollView (appbar_scrolling_view_behavior)
ConstraintLayout
<androidx.coordinatorlayout.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:animateLayoutChanges="true"
tools:context=".MainContentFragment">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_margin="32dp"
android:background="#android:color/transparent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/holo_red_dark"
app:layout_scrollFlags="scroll|enterAlways">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
...
This is the output before scrolling
And after scrolling down
As you can see the space outside the toolbar is not transparent but has that grey background, since the content is going under it and cannot be seen.
The idea behind showing the content behind the toolbar:
Setting a negative margin to the scrolling view (NestedScrollView/RecyclerView) which equals to what you want the size of the blank area when all the content are scrolled up (all the stuff below the toolbar, nothing behind); it's assumed -100dp in the below demo
Reverse back this negative margin on the child of the NestedScrollView (in layout), or the 1st child of the RecyclerView (programmatically)
Put the scrolling view on top of the AppBarLayout so that the background of the AppBarLayout don't obscure the scrolling content to let them appear in the back of the toolbar.
Cosmetics:
Remove the elevation of the AppBarLayout to 0 to make it as not existing; just the ToolBar is there.
Set the background color of the AppBarLayout to transparent, so now it takes the background of the root layout.
Demo:
<androidx.coordinatorlayout.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=".MainActivity">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="-100dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="100dp"
android:text="#string/longText" />
</androidx.core.widget.NestedScrollView>
<com.google.android.material.appbar.AppBarLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:color/transparent"
app:elevation="0dp">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:background="#drawable/rounded_toolbar"
app:layout_scrollFlags="scroll|enterAlways">
<com.google.android.material.appbar.MaterialToolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
For the RecyclerView, you can't control its children with layouts, so reversing the margin can either by
Having 2 layouts one with the 100dp top margin for the first child, another without margins for the rest children. And decide which layout in the adapter's onCreateViewHolder()
Adding the margin in adapter's onBindViewHolder():
#Override
public void onBindViewHolder(#NonNull CustomViewHolder holder, final int position) {
ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) holder.itemView.getLayoutParams();
if (position == 0) {
Resources resources = holder.itemView.getContext().getResources();
float dip = 100f;
float px = TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dip,
resources.getDisplayMetrics()
);
params.topMargin = (int) px;
} else
params.topMargin = 0;
holder.itemView.setLayoutParams(params);
//...... rest of code
}
You should just wrap all widgets inside CoordinatorLayout with FrameLayout and change AppBarLayout position to the end:
<androidx.coordinatorlayout.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:animateLayoutChanges="true"
tools:context=".MainContentFragment">
<FrameLayout android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
...
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_margin="32dp"
android:background="#android:color/transparent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#android:color/holo_red_dark"
app:layout_scrollFlags="scroll|enterAlways">
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
</FrameLayout>
<androidx.coordinatorlayout.widget.CoordinatorLayout
I'm trying to implement the following design on Android.
I know that to have the button at that position I should have two constraint layout; one for whole change password form and one for change password form without the Save button and then set the Save button's Top and Bottom constraint to the second ConstraintLayout.
But when I do this, the button goes behind the form, and therein lies the problem:
Here is my XML:
<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=".ChangePasswordActivity">
<include
android:id="#+id/changePasswordBar"
layout="#layout/top_bar_full"></include>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.constraint.ConstraintLayout
android:id="#+id/changePasswordCTL"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activities_constraint_top_bottom"
android:layout_marginEnd="#dimen/activities_constraint_start_end"
android:layout_marginStart="#dimen/activities_constraint_start_end"
android:layout_marginTop="#dimen/activities_constraint_top_bottom"
android:background="#drawable/radius_background_exchange"
android:elevation="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
// some EditText and TextView views here
</android.support.constraint.ConstraintLayout>
<br.com.simplepass.loading_button_lib.customViews.CircularProgressButton
android:id="#+id/changePasswordBT"
style="#style/customButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="32dp"
android:layout_marginStart="32dp"
android:layout_marginTop="8dp"
android:fontFamily="#font/sans_web_medium"
android:text="#string/finish"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:textSize="#dimen/signinup_button_font_size"
app:initialCornerAngle="5dp"
app:layout_constraintBottom_toBottomOf="#+id/changePasswordCTL"
app:layout_constraintEnd_toEndOf="#+id/changePasswordCTL"
app:layout_constraintStart_toStartOf="#+id/changePasswordCTL"
app:layout_constraintTop_toBottomOf="#+id/changePasswordCTL"
app:spinning_bar_color="#android:color/white"
app:spinning_bar_padding="6dp"
app:spinning_bar_width="4dp" />
</android.support.constraint.ConstraintLayout>
</android.support.design.widget.CoordinatorLayout>
When elevation isn't in the picture, views that are defined later in the XML file will draw "on top" of views defined earlier. However, your password form has android:elevation="5dp", and this will override the normal drawing order.
To fix, add elevation to the button as well. android:elevation="5dp" should be enough, since then they're at the same elevation and the normal rules should apply. But you could give it more elevation to guarantee that it always draws on top of the password form.
There is a 5dp elevation on the form and no elevation on the button, so it is partially obscured. Increase the button elevation to at least 5dp.
android:elevation="5dp"
You could achieve such design by using a CoordinatorLayout.
Example:
<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">
<ImageView
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="180dp"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:background="#color/primary" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_camera"
app:layout_anchor="#id/header"
app:layout_anchorGravity="bottom|center_horizontal" />
</android.support.design.widget.CoordinatorLayout>
just use the following to anchor the layout of your button to the layout of your library view:
app:layout_anchor= "id_of_password_form_layout"
As of now, with the official bottom sheet component from the Android design library implemented the top edge doesn't show a shadow. But for what I've seen in various mockups and in the Material Design specs, the bottom sheet include a discrete shadow of some sort.
I think the shadow would help distant the bottom sheet from the main layout, especially if there's a peek value set and/or the bottom sheet is always visible. Otherwise it just will blend together with the main layout and its items.
I've tried both ViewCompat.setElevation(bottomSheet, 5); and setting android:elevation="5dp" to the view in the XML, without success.
I know that a shadow shape doesn't have the same appearance as an elevation - but at least give it a try. The trick is to use app:layout_anchor to clip the shadow to the bottom sheet.
activity_main.xml
<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">
<MapView
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<View
android:id="#+id/shadow"
android:layout_width="match_parent"
android:layout_height="16dp"
android:background="#drawable/shape_gradient_top_shadow"
app:layout_anchor="#id/bottom_sheet" />
<FrameLayout
android:id="#+id/bottom_sheet"
android:layout_width="match_parent"
android:layout_height="200dp"
android:clipToPadding="false"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior" />
</android.support.design.widget.CoordinatorLayout>
shape_gradient_top_shadow.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:angle="90"
android:endColor="#android:color/transparent"
android:startColor="#64000000"/>
</shape>
Looks like this:
EDIT
Get an even better result with a custom ShadowView:
Post from Roman Nurik on this topic: https://plus.google.com/+RomanNurik/posts/2QvHVFWrHZf
Gist of the ShadowView based on Roman Nurik's solution: https://gist.github.com/MariusBoepple/bf869e02541cd4750550e88fa07b5ddd
Then you can do the following:
<ShadowView
android:id="#+id/shadow"
android:layout_width="match_parent"
android:layout_height="16dp"
android:gravity="bottom"
app:layout_anchor="#id/bottom_sheet" />
For API Level 21 and higher, set the following in the parent view. You can also try in the rootview of the bottomsheet (I have not tried it in the root view)
android:background="#android:color/white"
android:elevation="16dp"
If no background then can use
android:outlineProvider="bounds"
For example, I have my sheet inside a nested scroll view
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="false"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:elevation="16dp"
android:outlineProvider="bounds"
>
<include layout="#layout/bottomsheet_1" />
</android.support.v4.widget.NestedScrollView>
The trick is to use a CardView as parent and set the elevation in the CardView
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:background="#fff"
android:clickable="true"
android:focusable="true"
app:behavior_hideable="true"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:layout_height="140dp"
app:cardElevation="8sp"
card_view:cardCornerRadius="0dp">
<!--The content of your Bottom sheet-->
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
.
.
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
EDIT
This technique is not the best solution if you are supporting Kitkat and below. It's due to the extra margin added by the Cardview.
I think this will help you
first create bottom sheet like bellow then include in your main activity
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/bottom_sheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:behavior_hideable="true"
app:behavior_peekHeight="56dp"
android:layout_marginTop="0.5dp" // this margin depend on shadow area
android:background="set you color"
android:elevation="20dp" // chose your custom elevation
app:layout_behavior="#string/bottom_sheet_behavior">
<LinearLayout
android:layout_marginTop="1dp" // this margin depend on max elevation
android:layout_width="match_parent"
android:layout_height="200dp">
</LinearLayout>
</LinearLayout>