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cardView shadow elevation dosn't work well android studio

when i try to add a shadow to my cardView .. it works but only with a small width of card like below
so when i make the widht equal to 272dp and that what i want, the corners have no shadow like so
and this is my code! can anybody help?! & thank you too much :)
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_alignParentBottom="true"
android:clipToPadding="false"
android:clipChildren="false"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TextView
android:id="#+id/textView7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="17dp"
android:text="Available in" />
<androidx.cardview.widget.CardView
android:layout_width="160dp"
android:layout_height="58dp"
android:layout_gravity="center"
android:cardElevation="10dp"
android:layout_margin="8dp"
/>
</LinearLayout>
</LinearLayout>

There is a jerk when I set visibility GONE for this button

I am using android:animateLayoutChanges="true"
here I am sharing my card view layout :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="280dp"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:id="#+id/cvRegisteredPharmacy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginBottom="30dp"
app:cardBackgroundColor="#color/colorAccent"
app:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:orientation="vertical">
<ImageView
android:id="#+id/ivPharmacy"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_weight="0.25"
android:background="#color/colorWhite" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="15dp">
<TextView
android:id="#+id/tvPharmacyName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:text="Pharmacy Name"
android:textColor="#color/colorWhite"
android:textSize="16sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RatingBar
android:id="#+id/rbPharmacyRating"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:numStars="5"
style="?android:attr/ratingBarStyleSmall"
android:rating="3.5"
android:progressTint="#color/colorPrimary"
android:progressBackgroundTint="#color/colorGrey" />
<TextView
android:id="#+id/tvPharmacyInfo"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="5dp"
android:text="3.5"
android:textColor="#color/colorWhite"
android:textSize="12sp" />
</LinearLayout>
<TextView
android:id="#+id/tvPharmacyAddress"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="Pharmacy Address, 1/2 Main St NW, Monteral, QC"
android:textColor="#color/colorWhite"
android:textSize="14sp" />
</LinearLayout>
<Button
android:id="#+id/btnSelectPharmacy"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginBottom="15dp"
android:background="#drawable/btn_bg_white"
android:text="Select Pharmacy"
android:textColor="#color/colorAccent"
android:visibility="gone" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
Here is the complete layout that I've made
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="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=".activities.PharmacyMapActivity">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rvPharmaciesList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
Also, I am sharing the simple code where I am setting visibility of this button :
if (holder.btnSelectPharmacy.getVisibility() == View.VISIBLE){
holder.btnSelectPharmacy.setVisibility(View.GONE);
} else {
holder.btnSelectPharmacy.setVisibility(View.VISIBLE);
}
I've tried many solutions so far including view animation, Object animator, Expandable layout (through library) but no luck so far!
looking forward for your suggestions.
I've a workaround for this to lift the card up but then I want to make my card expanded from upside exactly as like as in the above picture.

While using automatic layout animation on the child node, the result will be, that the parent node just snaps to layout_alignParentBottom & wrap_content once the child node is View.GONE.
Combining two animations could make it less jerky. I mean, the CardView would need it's height animated; either synchronously or once the child node is View.GONE. Actually, when animating the child node to height 0dp, this would also animate the parent node's height, since it's wrap_content; setting a static value for the height would also prevent it from snapping alike that. Also animating to View.INVISBLE and then animating it's height would prevent the parent node from snapping. Sorry for not providing a ready-made solution, but explaining why it behaves alike that and how it might work is still better than no answer.

TabWidget custom tabs - unwanted extra margin and text aligment issues

I'm using TabWidget to get tabbed navigation. Each tab tile has icon and text below it. As content of my tab I currently have cardview list.
So, tab button layout:
<LinearLayout android:id="#+id/tabsLayout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="#+id/tab_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_gravity="bottom|center"/>
<TextView android:id="#+id/title"
style="#android:style/TextAppearance.Holo.Medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:textColor="#000000"
android:text="test"
android:visibility="visible"
android:focusableInTouchMode="false"
android:layout_gravity="center"
android:textIsSelectable="true" android:textSize="13sp"
android:textAlignment="center"
android:gravity="center_horizontal"/>
</LinearLayout>
My activity where tab widget is used:
<?xml version="1.0" encoding="utf-8"?>
<TabHost
android:id="#android:id/tabhost"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
<FrameLayout
android:id="#+id/realtabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"/>
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:orientation="horizontal" android:background="#84dadada"/>
</LinearLayout>
</TabHost>
FrameLayout is for replacing tab content with fragments when user switch between tabs. It works, but there are some problems though. This is how it looks like:
As you can see - first problem is icon alignment. If text is wrapped as multiline (large font and small screen), icon is not aligned with the rest ones that have one line label. How to get all icons properly aligned?
Second - there is white extra space just above my tab control - why? How to disable it?
Any ideas?
[edit]
My CardView is defined as follows:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="3dp"
>
<android.support.v7.widget.CardView android:id="#+id/card_view"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="center_vertical"
android:background="?android:attr/selectableItemBackground"
card_view:cardCornerRadius="0dp"
card_view:cardElevation="dp" android:clickable="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:orientation="horizontal">
<ImageView
android:id="#+id/card_image"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="2"
android:padding="6dp"
android:src="#drawable/ic_launcher"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="5"
android:orientation="vertical"
android:padding="4dp">
<TextView
android:id="#+id/card_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textStyle="bold"/>
<TextView
android:id="#+id/card_info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp"
android:text="Small Text"
android:textAppearance="?android:attr/textAppearanceSmall"/>
</LinearLayout>
<ImageView
android:id="#+id/arrow"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1"
android:padding="6dp"
android:src="#drawable/arrow"/>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
So it seems there is extra margin around cardview - top, bottom, left and right. How to disable it?

For the space issue have a look here, it may be a duplicate answer.
For the icon-alignment, have a look here, it shows how to keep your text on a single-line and use ellipsis to truncate it if your device doesn't have room to show it entirely. It may not be your perfect solution, but it's a good hint.

Unable To Center Objects Within Two Relative Layouts

I'm attempting to split the UI for my horizontal layout into two halves each with it's own realative layout so I am able to center text and graphics within the two left and right halves of the screen. The problem is when I attmept to do so - the go button still ends up in the middle of the screen instead of centered on the right hand of the screen.
(If I can figure out how to center correctly I'm sure I'll be able to apply the same technique to the other elements to achieve the result I desire.
SOURCE:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8sp"
android:layout_marginLeft="8sp"
android:layout_marginRight="8sp"
android:layout_marginTop="8sp"
android:background="#drawable/background"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/emblem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_marginTop="24dp"
android:gravity="center"
android:scaleType="fitStart"
android:src="#drawable/apn_app_logo" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/start2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true" >
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/go_button"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center"
android:text="#string/start_text2"
android:textColor="#000000"
android:textSize="18sp" />
<Button
android:id="#+id/go_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#drawable/apn_app_go_button" />
</RelativeLayout>
</RelativeLayout>
EDIT: (in response to Kuba's answer)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/background"
android:gravity="center"
android:orientation="horizontal" >
<ImageView
android:id="#+id/emblem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="24dp"
android:gravity="center"
android:scaleType="fitStart"
android:src="#drawable/apn_app_logo" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/background"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<Button
android:id="#+id/go_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/apn_app_go_button"
android:gravity="center_horizontal" />
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text="#string/start_text2"
android:textColor="#000000"
android:textSize="18sp" />
</LinearLayout>
</LinearLayout>

Instead of Relative layout, I would recommend using LinearLayout.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#00dd00"
android:gravity="center"
>
<Button
android:text="Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#dd0000"
android:gravity="center_horizontal"
>
<Button
android:text="Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
</LinearLayout>
In the inner LinearLayout you can either use android:gravity="center" to have its children centered vertically and horizontally. Or use use android:gravity="center_horizontal" to center in only horizontal way.
EDIT: Added the textview, which was discussed in the comments.
To have the textView appear underneath the button, you must change the orientation of the LinearLayout from horizontal to vertical. Please see the developer site .
The inner LinearLayout thus looks like this.
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical"
android:background="#dd0000"
android:gravity="center"
>
<Button
android:text="Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="text here"
/>
</LinearLayout>
How can I use android:layout_below="#+id/go_button" in a linear layout?
You can't. These relationships only work in relative layout where you place views in relation to each other or the parent view. In linear layout items are stacked either vertically or horizontally.

Set android:gravity="center" in
<Button
android:id="#+id/go_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#drawable/apn_app_go_button" />
Maybe its work.

How can I align this layout correctly?

I have two textviews. I want one of them to be left aligned and the other to be right aligned. Pretty much so that it looks like a 2 column table.
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="#+id/profileLayout" android:orientation="vertical">
<LinearLayout android:layout_width="wrap_content" android:layout_height="match_parent" android:id="#+id/experience" android:orientation="horizontal">
<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="#+id/experienceLabel" android:textStyle="bold" android:layout_weight="0" android:text="Experience"></TextView>
<LinearLayout android:id="#+id/linearLayout4" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_weight="1"></LinearLayout>
<TextView android:text="TextView" android:layout_height="wrap_content" android:id="#+id/experienceTextView" android:layout_gravity="right" android:layout_weight="0" android:layout_width="wrap_content"></TextView>
</LinearLayout>
</LinearLayout>

<LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal">
<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_weight="1"/>
<TextView android:layout_height="wrap_content" android:layout_weight="0" android:layout_width="wrap_content"/>
</LinearLayout>
Set the weight of the first one to 1 so it will eat up all of the extra space. Set the 2nd oen to wrap content, so it only takes up as much space as it needs.
But why do you have an extra LinearLayout around them? If you have nested LinearLayouts, you should probably be using a RelativeLayout instead.

<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="#+id/experienceLabel" android:textStyle="bold" android:layout_weight="1" android:text="Experience"></TextView>
<TextView android:text="TextView" android:layout_height="wrap_content" android:id="#+id/experienceTextView" android:layout_weight="1" android:layout_width="wrap_content"></TextView>
</LinearLayout>

Use Relative Layout. About Relative Layout Link Example link
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView android:layout_height="wrap_content"
android:layout_width="wrap_content" android:id="#+id/experienceLabel"
android:textStyle="bold" android:layout_weight="0" android:text="Experience"
android:layout_alignParentLeft="true"/>
<TextView android:text="TextView" android:layout_height="wrap_content"
android:id="#+id/experienceTextView" android:layout_gravity="right"
android:layout_weight="0" android:layout_width="wrap_content"
android:layout_alignParentRight="true" />
Benefit of using RelativeLayout: it reduces your number of layout. Which will optimize your ui too.

I'm not entirely sure of the exactly layout you want, but you can try this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/profileLayout"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:weightSum="2"
android:id="#+id/experience"
android:orientation="horizontal">
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="#+id/experienceLabel"
android:textStyle="bold"
android:layout_weight="1"
android:text="Experience"/>
<TextView
android:text="TextView"
android:layout_height="wrap_content"
android:id="#+id/experienceTextView"
android:gravity="right"
android:layout_weight="1"
android:layout_width="wrap_content"/>
</LinearLayout>
</LinearLayout>
You were using layout_gravity rather than gravity also. layout_gravity tells the parent how you want to be laid out, gravity tells content how to be laid out.
Notice how I have a weightSum in the parent layout to 2 and then set the two children to a weight of 1 each. I also set the parent to fill_parent
You had and extra layout in there too - if you want spacing, set a margin on the second textview or use a view (a simpler object than a LinearLayout)