I'm attempting to implement something similar to what you see in the Android Google Contacts app. You have a large toolbar with content underneath and when you scroll to view the content, the toolbar shrinks and the content in the toolbar shifts, fades and shrinks to fit into a standard size toolbar.
I'm using Xamarin Forms and Visual Studio 2017. My MainActivity.cs is inheriting FormsAppCompatActivity and I've implemented a standard Resource.Layout.Toolbar.
ToolbarResource = Resource.Layout.Toolbar;
The toolbar is styled so the background is transparent however.
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/transparent"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
I cannot figure out how to get the ScrollView (or any other element) to sit underneath the toolbar. I have seen a few other posts relating to this but nothing using Xamarin Forms.
Is this possible to sit content underneath the toolbar? If so, how do I do it?
use collapsingtoolbar of material design
Related
I am trying to integrate Collapsing layout with Navigation Advanced example
What I tried?
Added Collapsing bar layout to main_actvity.xml
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"/>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
Modified setupBottomNavigationBar() in MainActivity.kt
private fun setupBottomNavigationBar(){
...
controller.observe(this, Observer { navController ->
mainBinding.collapsingToolbarLayout.setupWithNavController(mainBinding.toolbar, navController)
//setupActionBarWithNavController(navController)
})
...
}
Current issue:
Now I have two ActionBars instead of one. Top one have app name as the title, one below shows nothing initially but when navigated to an sub destination only a grey back arrow is shown, no destination label is shown on the actionbar
Anyone who understand this multiple backstack implementation, please help me to get things work with CollapsingToolbarLayout
Update:
Got rid of one action bar as #Manoj suggested in a comment, Now need to fix not appearing of titles in the actionbar
Update 2:
Although the destination labels(titles) are not shown when navigated to sub destinations, but back button is shown.
if the title is not displayed (and that increasing the appbar layout height "works"), just set the isTitleEnabled of the collapsingToolbarLayout to false.
It should fix the problem
I finally figured out why the toolbar title was not shown reason was I have not set enough height for appbar layout, I was using wrap_content so collapsing toolbar layout was covering the toolbar title. Solution was to set appbar layout height to value larger than 64dp. When I increased the appbar layout height, it looks unusually tall. (Forgive me for my lack of understanding of how collapsing toolbar works)
But this was not my intention, I wanted to enable collapsing toolbar for some specific fragments, I was using single activity concepts as navigation architecture component recommends.
As I read in following answers
Having two toolbars and making one transparent when doing fragment transactions.
Having separate toolbar for each fragment
IMHO Both of these are not good solutions if you are using navigation architecture component, there is no value of using navigation architecture component, if you need to manage fragment transactions or toolbars manually.
So for now I have stop using collapsing toolbar.
In my app I want to recreate something that is very similar to the Lollipop+ quick settings panel that everyone knows.
That is: by clicking or dragging the header, I want a panel to slide down from below the header and push down the existing content.
Applied to my app now, the header is a Toolbar and the main content is a RecyclerView showing a list of blog posts. By clicking or dragging the Toolbar, I'd like a panel to appear to show some stats about the blog. Like so:
I have been messing around with the awesome (but complex) Android Design Support Library. It has great functionality for scrolling and designing the interaction between the app bar and the main content. But the effect is hard to achieve.
I have studied the CollapsingToolbarLayout but couldn't use it in a way that the content is expanded below the main Toolbar. I have also studied the SlidingUpPanel library but couldn't make it push the content down, simply hover. Overall, I'm a bit lost as to how CoordinatorLayout, CollapsingToolbarLayout and scrolling Behaviors should interact together...
Does anyone know to recreate this "quick settings" effect? Alternatively, maybe someone knows where I should look to find the code for the Quick Settings in AOSP?
Thanks a lot!
Recently I created a library called Toolbar Panel that worked like quick settings drawer. You can customize the Panel by yourself. If you have any question or issue you can create issue in the github or comment in this answer.
This is the demo video :
I have finally taken the time to solve my own problem, after good insights from Niko Yuwono and Hetal Upadhyay.
The key was to rely on the CoordinatorLayout and to describe two custom Behaviors: one for the sliding panel, another one for the main content. I have actually created a library for this purpose as this may help other people in the future: SubAppBarPanel. See it in action.
Sample code:
<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.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:clickable="true"
android:foreground="?selectableItemBackground" />
</android.support.design.widget.AppBarLayout>
<com.davidferrand.subappbarpanel.SubAppBarPanel
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:panel_expanded="false"
app:panel_offset="10dp"
app:panel_slidingQuantity="85%">
<!-- Content of the sliding panel -->
</com.davidferrand.subappbarpanel.SubAppBarPanel>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="com.davidferrand.subappbarpanel.SubAppBarPanel$ScrollingViewBehavior">
<!-- Main content -->
</FrameLayout>
</android.support.design.widget.CoordinatorLayout>
Note: dragging behavior is still a TODO.
Overview
I am trying to implement one of the Scrolling Techniques, Flexible space with overlapping content, described in Material Design.
Flexible space with overlapping content
Content can overlap the app bar.
Behavior:
The app bar’s starting position should be located behind the content.
Upon upward scroll, the app bar should scroll faster than the content,
until the content no longer overlaps it. Once anchored in place, the
app bar lifts up to allow content to scroll underneath.
https://www.google.co.in/design/spec/patterns/scrolling-techniques.html#scrolling-techniques-scrolling
Problem
However, the problem is,
the title in my AppBar scrolls down when expanded and hides below the overlapping content.
Here, my toolbar is hidden below the overlapping CardView.
When the appbar is collapsed, the toolbar and hence the Title slides up from below.
Code
Here's my Code:
activity-main.xml
<android.support.design.widget.CoordinatorLayout
...
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
...
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="top"
android:background="?attr/colorPrimary"
app:layout_collapseMode="pin"
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"
...
I have also added these in my MainActivity's onCreate function
setSupportActionBar(toolbar);
collapsingToolbarLayout.setTitle("App Name");
I want the toolbar(with the tile and the other contents, which I will add later) to stay at the top irrespective of the appbar being expanded or collapsed.
I have read the documentations, gone through many posts and tutorials, watched a lot of videos but failed to find a working solution or any related solutions at all.
If anyone has some idea on how to fix this, please suggest. Thanks for helping.
I was looking for a solution myself when I found the answer in the comments on a similar issue report.
Basically you call setTitleEnabled() on your CollapsingToolbarLayout like this:
CollapsingToolbarLayout.setTitleEnabled(false);
You can do this in xml as well, by adding this to your CollapsingToolbarLayout:
app:titleEnabled="false"
By setting it to false, you'll get the desired behaviour. The title stays fixed to the top of the screen.
The Toolbar itself was actually already at the top, but this makes the title stay there as well, instead of translating between the bottom of the CollapsingToolbarLayout and the Toolbar.
I have acheived this by adding below code inside Toolbar tag.
app:layout_collapseMode="pin"
In my case I needed to add app:titleEnabled="false" to the CollapsingToolbarLayout AND app:layout_collapseMode="pin" to the android.support.v7.widget.Toolbar
Now the toolbar stays pinned to the top of the screen, irrespective of whether the user scrolls up or down.
To keep title at top, simple put this attribute to your CollapsingToolbarLayout:
app:expandedTitleGravity="top"
I've problems with implementing this guidelines in Kitkat. On Lollipop everything looks ok:
But on Kitkat Toolbar does not have any top padding:
I can fix this with https://github.com/jgilfelt/SystemBarTint library using:
SystemBarTintManager.SystemBarConfig config = tintManager.getConfig();
mainView.setPadding(0, config.getPixelInsetTop(false), config.getPixelInsetRight(), config.getPixelInsetBottom());
But I feel that I'm doing something wrong. Do you have any good practices how to achieve this effect on KitKat?
Move current layout resource in layout-v21 folder to have it as it is on the first screenshot. Then try to create new layout resource that will have just a placeholder view of same height of the status bar
Hierarchy should be following:
--Top layout
--<view layout_height="25dip"...>
-- Toolbar
-- the rest of the views
Using view аbove your Toolbar, will not push it behind the status bar, as it is on second screenshot and will mimick the padding you are trying to achieve
Do you have fitsSystemWindow set to true? Setting it to false will bring the toolbar back under the status bar.
The effect you see for Kitkat is because you have translucent status bar set and fitting to System Window goes underneath it.
For example, in your layout XML file:
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
android:fitsSystemWindows="false">
<android.support.v7.widget.Toolbar
android:background="#color/blue"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:id="#+id/action_bar"/>
<!-- YOUR CONTENT HERE -->
<!-- YOUR NAVIGATION VIEW HERE -->
</android.support.v4.widget.DrawerLayout>
The latest Android Support Library introduced the DrawerLayout to implement the common UX pattern where you slide right or left to show a navigation menu.
What I'd love to have is a vertical DrawerLayout with the same API, that can be pulled down/up from the top/bottom of my layout.
Since 4.2 the old SlidingDrawer has been deprecated and I haven't heard about some new Widget that implements the same functionality.
Can the DrawerLayout be extended somehow to implement the vertical swipe UX pattern?
Does google provide some different widget to implement it?
Google Music for instance has something very similar to what I'm looking to implement to pull up the player.
We have recently implemented this in the Umano App and open sourced: https://github.com/umano/AndroidSlidingUpPanel
Enjoy.
The Android support library now has the bottom sheets behavior to do that.
Check out this link for more info https://material.google.com/components/bottom-sheets.html
Nowadays, it makes more sense to use the BottomSheetBehavior that you can find more information on how setting it up on https://code.tutsplus.com/articles/how-to-use-bottom-sheets-with-the-design-support-library--cms-26031
Basically, you need to set your main content, and your sliding content. The BottomSheetBehavior would only work for panels that you slide from the bottom to the top.
It has a quite simple set up and the BottomSheetBehavior could even work out of the box. Only by writing a android.support.design.widget.CoordinatorLayout layout, with another View inside (with even wrap_content as a value in the layout_height parameter), for instance a LinearLayout like this one:
<android.support.design.widget.CoordinatorLayout
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"
android:fitsSystemWindows="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:behavior_hideable="true"
app:behavior_peekHeight="56dp"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior">
<!-- Your content goes here -->
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
In my case, I inflate this layout in a Fragment and add it to the Activity where you want to enable the SlidingSheetBehavior.