Develop Reference

Change the background color below the floating action button that is a part of a BottomAppBar

I'd like to have a semi-transparent floating-action-button that is a part of a bottom-app-bar. I can tune all colors but the one underneath the FAB itself.
I guess it belongs to the bottom-app-bar but I cannot figure out how to change it. Do you know how to do it? It doesn't fit my color scheme as it's a darker black then the other blacks. There's also some strage whity circle. If possible I'd like to get rid of this one too.
This is their code:
<com.google.android.material.bottomappbar.BottomAppBar
android:id="#+id/bottomAppBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:menu="#menu/bottom_app_bar" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/commit_FloatingActionButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:backgroundTint="#5A396283"
app:layout_anchor="#id/bottomAppBar"
app:srcCompat="#drawable/ic_round_check_24"
app:tint="#D3D3D3" />

You can do it simply by:
Set android:backgroundTint="#android:color/transparent" on the FloatingActionButton
Create a custom drawable as a separate resource file containing background (which you obviously can control) and checkmark drawable.
set app:srcCompat value to point on newly created custom resource

Floating action button in android not displaying correctly

I am trying to change the default FloatingActionButton icon to a add circle icon. I have downloaded the icon ic_add_circle_white_18dp from material.io and added it to the drawable directory inside the andorid project. However when I try to use it inside my activity it displays as a black inner icon as in image
However I want the FAB icon to look like
My FAB icon xml looks like
<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="#drawable/ic_add_fab"
app:elevation="8dp"
app:backgroundTint="#android:color/holo_blue_light"
app:rippleColor="#android:color/white"/>
I have tried setting the app:backgroundTint value but it doesn't effect the inner icon style
Thanks for any help

Importing Clipart corresponding to the add icon from image asset works:
Steps:
1. Right Click on res.
2. Select New->Image Asset
3. In Icon type, select Action Bar and Tab Icons
4. Provide a name
5. Select ClipArt in Asset type and the click on the Clip Art icon.
6. From the content section select add button
7. In theme set HOLO_DARK
6. Click Next and then finish
In order to use this as an icon, include the following in your XML. Note that to use the icon as source android:src="#drawable/ic_add_fab" is used
<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"
android:src="#drawable/ic_add_fab" />

Try downloading and using icon with name "add" instead of "add circle"

This worked for me
<android.support.design.widget.FloatingActionButton
android:id="#+id/logout_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/logout"
app:rippleColor="#null"
app:backgroundTint="#null"
app:fabSize="normal"
android:layout_gravity="bottom|center_horizontal"
android:scaleType="center"/>
Also src icon should be the same according to the requirement.
I used 140x140 for xhdpi drawable

Instead of app:srcCompat= use app:src= for images.
Or use fab.setImageResource(R.drawable.ic_add); to programatically set the image.

You need to set scaleType for it to be rendered properly:
android:scaleType="center"

Why is my floating action button not displaying its image properly?

This is what my floating action button is showing
rather that just showing the actual circle part of the image, it tries to fit the background of my .png file into the floating action button.
here is my xml code:
<android.support.design.widget.FloatingActionButton
android:id="#+id/addToKitchenButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:layout_gravity="bottom|end"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:src="#drawable/fab_icon"
/>
how do I get it to look like this?
I've given my .png file a transparent background already, so I don't know what else I need to do. Please Help.
Thank You.

(Assuming you are using Android Studio) -- Rather than using your own custom .png for the FloatingActionButton's src, create a new vector asset with that icon. Right click your res/drawable folder in Android Studio, and then click to New -> Vector Asset.
The icon you are using is built in to Android Studio, although you could import your own vector asset if you were doing something more custom. The XML it generates will look like this:
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24.0"
android:viewportHeight="24.0">
<path
android:fillColor="#FF000000"
android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
and you can change the color in fillColor. Set your FloatingActionButton to this drawable in android:src and you're good to go.

Try overriding the "design_fab_image_size" in the dimens file
<dimen name="design_fab_image_size" tools:override="true">56dp</dimen>
Also, add
app:tint="#null"
inside your FAB button XML

You dont have to provide the rounded corner image.
I am using and I my xml looks like this
<android.support.design.widget.FloatingActionButton
android:id="#+id/addFolder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:clickable="true"
android:src="#drawable/plus"
app:layout_anchor="#id/mainRl"
android:background="#ff0000"
app:layout_anchorGravity="bottom|right|end"
android:onClick="onAddFolderClick"
/>
I am using #ff0000(red) as background color, you use the pink you want. It works fine for me.

For a consistent look there are two tings that you need to do. This answer assumes that you really want the look in the link provide by you which is this
First Step - The background color is nothing but your app accent color you need not provide any specific color. So first make sure you have accent color set in your app theme.
Second Step - Once you have done that you need to use the xml code below. You don't even have to create a new png if you want the look in link. You can easily download one in white color add icon from this official google material icons link . You can use this links for most of standard material icons by google.
<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"
android:src="#drawable/ic_add_white_24dp"/>
Hope this helps. Do let me know if it changed things for you.
EDIT:: If you wish to change the icon color and background to something completely different than your default accent color then you have to use these attributes-
//for custom background
app:backgroundTint="#color/yourCustomColor"
//for custom icon color
android:tint="#color/yourCustomColor"

Why background color are included in png image of ImageView?

I am an absolute beginner to Android. I am learning how to design a layout. But I am having problem with ImageView:
When I set the src of ImageView with a PNG file, the dark color background is automatically added to all the images like in screenshot:
The real image of is like this: (There's no background)
This is the xml layout for my toolbar and I did not set any background for the ImageView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:fitsSystemWindows="true"
android:minHeight="?attr/actionBarSize"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:background="?attr/colorPrimaryDark">
<ImageButton
android:id="#+id/btn_open_sidebar"
android:src="#drawable/open_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageButton
android:layout_alignParentRight="true"
android:id="#+id/btn_calendar"
android:src="#drawable/calendar"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
So how can I make that PNG image transparent or with the same background as the toolbar? I mean, how to remove that default dark background color?

I think because you are using ImageButton android adds a default background to it.
you can add android:backgroud="#android:color/transparent" to your ImageButtons and force android to use transparent background.

It is Default property of ImageButton. This won't happen in ImageView so update your question. Use ImageView or set background of ImageButton to null or a transparent color to fix it
android:background="#android:color/transparent"

If you are using Android Studio, then instead of copy and paste of .png file, right click on drawable and select New -> ImageAsset and then select the image which you want to have in drawable folder. It will remove the dark background part of the image.

Open image in explorer, right click and go to "properties", go to details tab and check the Bit depth. From my experience android studio adds black background if it is not "32". I don't know why it does that but it does not apply transparency otherwise.
I just edit image with "paint.net" and resave it as 32bit.
Its a workaround but works for me everytime.

You have to change you parent layout background color.
This
android:background="?attr/colorPrimaryDark"
to
aandroid:background="any colour code"

You can set the background color of the imageview to "#00000000"
It should do the trick.
The first two hexa-digits in the 8 hexa-digits in a color mark opacity
00 is fully transparent and FF is fully opaque.

In your relative layout you have this background:
android:background="?attr/colorPrimaryDark"
check this color in colors.xlm

How to change the default FAB image in scrolling activty

I am trying to learn to work on scrolling activity (android studio) but I am unable to change the default Fab Icon provided by the activity itself. Can someone please provide some guidance about changing the Fab icon to another icon image?
(In short: How to change "mail" Icon to "+" icon)

in your xml change src drawable:
android:src="#android:drawable/ic_dialog_email"
to your desirable icon.

Plus Icon Image add into Drawble folder
Here is image.
Write in your xml
<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"
android:background="#C2185B"
android:src="#drawable/ic_action_add" />

change your android:src="#android:drawable/your_image.png"
where your_image is your image in drawable folder

It took me a while to find the solution a easyone for this simple problem,in .java(Scrolling activity)you will be able to locate
fab,Right click it -->Go to--> Declaration-->The page you land is the page you need to edit for changing the Fab icon.
Upload the fab icon Image you have in
*android:src="#drawable/*****"*.
and the fab icon will be changed

It should be noted that ic_input_add is found in the R.drawable reference at https://developer.android.com/reference/android/R.drawable.html#ic_input_add
In Android Studio 3.3.2 in a new Kotlin program, this setting is found in the activity_main.xml file. The default FloatingActionButton settings are:
<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"/>
The last line of this code block is being changed to:
app:srcCompat="#android:drawable/ic_input_add"/>
You will notice a preview of the drawable image next to the line number if you are editing in Android Studio 3.3.2. Click this image and you can open the resource. Here you will see a full view of the image and the path to the image. In my case it's in the ~\plugins\android\lib\layoutlib\data\res\drawable-ldpi directory. It may be different for you, but easy enough to determine from there. Other compatible drawables are found there as well.
Here is a list of other drawables from the reference (be sure to check the reference as it may change):
ic_btn_speak_now
ic_delete
ic_dialog_alert
ic_dialog_dialer
ic_dialog_email
ic_dialog_info
ic_dialog_map
ic_input_add
ic_input_delete
ic_input_get
ic_lock_idle_alarm
ic_lock_idle_charging
ic_lock_idle_lock
ic_lock_idle_low_battery
ic_lock_lock
ic_lock_power_off
ic_lock_silent_mode
ic_lock_silent_mode_off
ic_media_ff
ic_media_next
ic_media_pause
ic_media_play
ic_media_previous
ic_media_rew
ic_menu_add
ic_menu_agenda
ic_menu_always_landscape_portrait
ic_menu_call
ic_menu_camera
ic_menu_close_clear_cancel
ic_menu_compass
ic_menu_crop
ic_menu_day
ic_menu_delete
ic_menu_directions
ic_menu_edit
ic_menu_gallery
ic_menu_help
ic_menu_info_details
ic_menu_manage
ic_menu_mapmode
ic_menu_month
ic_menu_more
ic_menu_my_calendar
ic_menu_mylocation
ic_menu_myplaces
ic_menu_preferences
ic_menu_recent_history
ic_menu_report_image
ic_menu_revert
ic_menu_rotate
ic_menu_save
ic_menu_search
ic_menu_send
ic_menu_set_as
ic_menu_share
ic_menu_slideshow
ic_menu_sort_alphabetically
ic_menu_sort_by_size
ic_menu_today
ic_menu_upload
ic_menu_upload_you_tube
ic_menu_view
ic_menu_week
ic_menu_zoom
ic_notification_clear_all
ic_notification_overlay
ic_partial_secure
ic_popup_disk_full
ic_popup_reminder
ic_popup_sync
ic_search_category_default
ic_secure

Change the keyword as given below will show you the add button.
app:srcCompat="#android:drawable/ic_input_add"