Develop Reference

How to set dropdown arrow in spinner with underline from image

List item
my code is in the style
this is inside the style.xml
<style name="SpinnerTheme">
<item name="android:background" >#drawable/bg_spinner</item>
</style>
bg_spinner.xml
<item>
<layer-list>
<item >
<bitmap android:gravity="bottom" android:src="#drawable/under_line" />
</item>
<item android:right="5dp">
<bitmap android:gravity="center_vertical|right" android:src="#drawable/dropdown" />
</item>
</layer-list>
</item>
<Spinner
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/SpinnerTheme"
android:layout_marginTop="15dp"
android:hint="Sex"
android:id="#+id/spinnerSex" />
date,month and year are in full width,and background image also less width, but when it comes sex its not showing full width.
i need the under line in sex full width, please do the needfull

You can draw line by xml code. like below
<item >
<layer-list>
<item>
<shape android:shape="rectangle" >
<solid android:color="#android:color/transparent" />
<!-- background color of box -->
</shape>
</item>
<item
android:left="-2dp"
android:right="-2dp"
android:top="-2dp">
<shape>
<solid android:color="#android:color/transparent" />
<stroke
android:width="1dp"
android:color="#323232" />
<!-- color of stroke -->
</shape>
</item>
<item android:right="5dp">
<bitmap android:gravity="center_vertical|right" android:src="#drawable/downlarrow" />
</item>
</layer-list>
</item>
output looks something like this

replace your xml code with this code:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<!-- Draw a 2dp width border around shape -->
<stroke
android:color="#000000"
android:width="2dp"
/>
</shape>
</item>
<!-- Overlap the left, top and right border using background color -->
<item
android:bottom="2dp"
>
<shape android:shape="rectangle">
<solid android:color="#ffffff"/>
</shape>
</item>

Full XML Code is:
Keep below code in your drawable directory. File name can be like this: "bg_spinner.xml"
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<layer-list>
<item>
<shape android:shape="rectangle">
<solid android:color="#android:color/transparent" />
<!-- background color of box -->
</shape>
</item>
<item android:left="-2dp" android:right="-2dp" android:top="-2dp">
<shape>
<solid android:color="#android:color/transparent" />
<stroke android:width="1dp" android:color="#323232" />
<!-- color of stroke -->
</shape>
</item>
<item android:right="5dp">
<bitmap android:gravity="center_vertical|right" android:src="#mipmap/arrow_down" />
</item>
</layer-list>
</item>
</selector>
In above code change bitmap src to your arrow image from drawable or mipmap directory. You can take nice arrow from "File -> New -> Vector Asset"
In your style.xml file keep below code:
<style name="SpinnerLineTheme" parent="android:Widget.Spinner">
<item name="android:background">#drawable/bg_spinner</item>
<item name="android:elevation">0dp</item>
<item name="android:popupBackground">#color/colorWhite</item>
</style>
And call the theme from spinner like below:
<Spinner
android:id="#+id/mySpinner"
style="#style/SpinnerLineTheme"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="#color/colorWhite"
android:dropDownWidth="300dp"
android:dropDownVerticalOffset="60dp"
android:gravity="start"
android:paddingEnd="30dp"
android:spinnerMode="dropdown" />
PS: Inspired by #Jayanth answer, as edit request queue is full.

Ripples on a shape with a transparent background

I am using the following shape in my app
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape android:shape="oval" >
<solid android:color="#color/primary_light"/>
<size android:height="80dp" android:width="80dp"/>
</shape>
</item>
<item android:state_focused="true">
<shape android:shape="oval">
<stroke android:color="#color/primary_light" android:width="5dp"/>
<size android:height="80dp" android:width="80dp"/>
</shape>
</item>
<item>
<shape android:shape="oval">
<solid android:color="#android:color/transparent"/>
<size android:height="80dp" android:width="80dp"/>
</shape>
</item>
</selector>
It is there in my drawable folder. Now I am updating my app to Lollipop and I wish to give a ripple feedback on the circular button that I used.
So in drawable-v21 folder I changed it to a ripple selector:
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="#color/primary_light">
<item>
<selector>
<item android:state_focused="true">
<shape android:shape="oval">
<stroke android:color="#color/primary_light" android:width="5dp"/>
<size android:height="80dp" android:width="80dp"/>
</shape>
</item>
<item android:id="#android:id/mask">
<shape android:shape="oval">
<solid android:color="#android:color/transparent"/>
<size android:height="80dp" android:width="80dp"/>
</shape>
</item>
</selector>
</item>
</ripple>
But unfortunately the ripple effect is not generated by using the above drawable in Lollipop. Is it because of the <solid android:color="#android:color/transparent"/>?
Can anyone show me where I have go wrong? Thanks

After a few trial and errors it seems I have misunderstood the hierarchy of the selector and item.
The following works perfectly.
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="#color/primary_light">
<item android:id="#android:id/mask">
<shape android:shape="oval">
<solid android:color="#android:color/white"/>
<size android:height="80dp" android:width="80dp"/>
</shape>
</item>
</ripple>

This works with a transparent background:
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:colorControlHighlight"
android:exitFadeDuration="#android:integer/config_shortAnimTime">
<!-- Use this to define the shape of the ripple effect (rectangle, oval, ring or line). The color specified here isn't used anyway -->
<item android:id="#android:id/mask">
<shape android:shape="rectangle">
<corners android:radius="3dp"/>
<!-- This color is needed to be set - doesn't affect anything -->
<solid android:color="#android:color/white"/>
</shape>
</item>
<!-- This is the background for your button -->
<item>
<!-- Use the shape you want here -->
<shape android:shape="rectangle">
<!-- Use the solid tag to define the background color you want -->
<solid android:color="#android:color/transparent"/>
</shape>
</item>
</ripple>
This was modified a bit from this answer: Transparent ripple

You can have a ripple effect on transparent or semi-transparent background when the ripple mask is specified. The ripple mask is a Drawable but only the alpha value is used setting the ripple alpha per pixel. Here is an example for creating programmatically.
var background = new android.graphics.drawable.GradientDrawable();
background.setShape(android.graphics.drawable.GradientDrawable.RECTANGLE);
background.setColor(0x77FFFFFF); // semi-transparent background
background.setCornerRadius(10);
background.setStroke(3, 0xFF1144FF); // border color
var mask = new android.graphics.drawable.GradientDrawable();
mask.setShape(android.graphics.drawable.GradientDrawable.RECTANGLE);
mask.setColor(0xFF000000); // the color is irrelevant here, only the alpha
mask.setCornerRadius(5); // you probably want the same corner as the background
var rippleColorLst = android.content.res.ColorStateList.valueOf(
android.graphics.Color.argb(255,50,150,255)
);
// aaaand
var ripple = new android.graphics.drawable.RippleDrawable(rippleColorLst,background,mask);
yourButton.setBackground(ripple);
(Sorry for the JavaScript/NativeScript code, probably one can understand it)

Following code works for custom shape with ripple effect for transparent button -
main_activity_buttons_ripple_with_background.xml
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:color="#888888"
tools:targetApi="lollipop">
<!-- Use this to define the shape of the ripple effect (rectangle, oval, ring or line). The color specified here isn't used anyway -->
<item android:id="#android:id/mask">
<shape android:shape="rectangle">
<corners android:radius="25dp" />
<!-- This color is needed to be set - doesn't affect anything -->
<solid android:color="#000" />
</shape>
</item>
<!-- This is the background for your button -->
<item>
<!-- Use the shape you want here -->
<shape android:shape="rectangle">
<!-- Use the solid tag to define the background color you want -->
<solid android:color="#android:color/transparent" />
<stroke
android:width="1dp"
android:color="#FFF" />
<corners android:radius="25dp" />
</shape>
</item>
</ripple>
styles.xml
<style name="MainActivityButtonsStyle">
<item name="android:background">#drawable/main_activity_buttons_ripple_with_background</item>
<item name="android:textAllCaps">false</item>
<item name="android:layout_margin">15dp</item>
<item name="android:paddingLeft">20dp</item>
<item name="android:paddingRight">20dp</item>
<item name="android:layout_centerHorizontal">true</item>
<item name="android:layout_width">wrap_content</item>
<item name="android:layout_height">50dp</item>
<item name="android:textColor">#FFF</item>
<item name="android:textSize">18sp</item>
</style>
activity_main.xml
<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="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<Button
android:layout_alignParentTop="true"
style="#style/MainActivityButtonsStyle"
android:text="#string/button_search_by_id" />
</RelativeLayout>
</LinearLayout>

Make Custom Drawable Shape in Android

I want to make drawable like below,
I am able to make the Rectangle and Triange shape in two different xml files. But i want to joint them to make the drawable like this.

Use layer-list to make this custom shape drawable.
/res/drawable/custom_shape.xml:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Transparent Rectangle -->
<item>
<shape android:shape="rectangle">
<size
android:width="300dp"
android:height="60dp" />
<solid android:color="#android:color/transparent" />
</shape>
</item>
<!-- Colored Rectangle -->
<item
android:bottom="20dp">
<shape android:shape="rectangle">
<size
android:width="300dp"
android:height="60dp" />
<solid android:color="#9A8585" />
</shape>
</item>
<!-- Bottom Triangle -->
<item
android:left="80dp"
android:right="120dp"
android:top="0dp"
android:bottom="30dp">
<rotate android:fromDegrees="45">
<shape android:shape="rectangle">
<solid android:color="#9A8585" />
</shape>
</rotate>
</item>
<!-- Top Border -->
<item
android:bottom="75dp">
<shape android:shape="rectangle">
<solid android:color="#EFC1B3" />
</shape>
</item>
</layer-list>
USE:
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/custom_shape"/>
OUTPUT:
Hope this will help~

Use <layer-list/> for that.
Here is an example for instance.
in Drawable folder of resin project directory,
make xml file and name it as layerlist.xml and paste it below code as your requirement.
you can also add your shape drawable instead of drawable in the <item/> tag in the example. and use this xml as a background of ImageView.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<bitmap android:src="#drawable/android_red"
android:gravity="center" />
</item>
<item android:top="10dp" android:left="10dp">
<bitmap android:src="#drawable/android_green"
android:gravity="center" />
</item>
<item android:top="20dp" android:left="20dp">
<bitmap android:src="#drawable/android_blue"
android:gravity="center" />
</item>
</layer-list>
Here is the result of the use of <layer-list/>.
I hope it helps you...

I expect that you need it for a a Tabular navigator or a ViewPager. My suggestion is that
1)Use the rectangle as your background for all the cases.
2)Create the same triangle drawable but with the background color (White or transparent) for the unselected item.
3)Create a view with the triangle background for all the items
4)Manually setVisibility of the triangle view according to the selection state

Android - make an arrow shape with xml

I want to make a button for my shape like this one
Is there a way to do this with xml ?
Like setting some points, in my case I have 5..

What you need is to create a shape xml file in your project's drawable-xxx folder and then use this shape as background for a button.
Here is the shape file called arrow_shape.xml:
<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- Colored rectangle-->
<item>
<shape android:shape="rectangle">
<size
android:width="100dp"
android:height="40dp" />
<solid android:color="#5EB888" />
<corners android:radius="0dp"/>
</shape>
</item>
<!-- This rectangle for the top arrow edge -->
<!-- Its color should be the same as the layout's background -->
<item
android:top="-40dp"
android:bottom="65dp"
android:right="-30dp">
<rotate
android:fromDegrees="45">
<shape android:shape="rectangle">
<solid android:color="#ffffff" />
</shape>
</rotate>
</item>
<!-- This rectangle for the lower arrow edge -->
<!-- Its color should be the same as the layout's background -->
<item
android:top="65dp"
android:bottom="-40dp"
android:right="-30dp">
<rotate
android:fromDegrees="-45">
<shape android:shape="rectangle">
<solid android:color="#ffffff" />
</shape>
</rotate>
</item>
</layer-list>
Then use it as button's background, for example
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/arrow_shape"/>
Here is the screenshot:
More info on Layer-List you can find here.
EDIT:
Keep in mind though that I used certain values for the shape's width and height. If you change those you might need to change the values of the top, bottom and right attributes. So, in that case consider using different values in your project's values directory.

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:width="50dp" android:height="10dp" android:right="6dp">
<shape>
<solid android:color="#android:color/holo_green_dark"/>
<corners
android:bottomLeftRadius="2dp"
android:topLeftRadius="2dp"/>
</shape>
</item>
<item android:width="7dp" android:height="7dp"
android:left="50dp">
<rotate android:fromDegrees="45"
android:pivotX="0"
android:pivotY="0">
<shape>
<solid android:color="#android:color/holo_green_dark"/>
</shape>
</rotate>
</item>
</layer-list>

With the Material Components library you can just use the standard MaterialButton defining the shapeAppearanceOverlay attribute:
Something like:
<com.google.android.material.button.MaterialButton
app:shapeAppearanceOverlay="#style/ShapeAppearanceOverlay.Button.Triangle"
... />
And in your style define:
<style name="ShapeAppearanceOverlay.Button.Triangle" parent="">
<item name="cornerFamily">rounded</item>
<item name="cornerSizeTopLeft">0dp</item>
<item name="cornerSizeBottomLeft">0dp</item>
<item name="cornerFamilyTopRight">cut</item>
<item name="cornerFamilyBottomRight">cut</item>
<item name="cornerSizeTopRight">50%</item>
<item name="cornerSizeBottomRight">50%</item>
</style>

How to apply stroke to a button specific sides in android

How can I apply stroke to a button's only two sides that is LEFT border and RIGHT border? in android.
I have apply the following code but it's not working
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- This is the main color -->
<item>
<shape>
<solid android:color="#EEEEEE" />
</shape>
</item>
<!-- This is the line -->
<item android:right="1dp">
<shape>
<solid android:color="#333333" />
</shape>
</item>
<item android:left="1dp">
<shape >
<solid android:color="#333333"/>
</shape>
</item>
</layer-list>

You were on the right track. This will do the trick:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape>
<solid android:color="#EEEEEE" />
</shape>
</item>
<!-- This is the line -->
<item android:right="1dp" android:left="1dp">
<shape>
<solid android:color="#333333" />
</shape>
</item>
</layer-list>
And use this as the background for your button. Just tested it - works just fine.

I would suggest using a 9-patch drawable that looks like this:
It has the required black border, 1px on each side of the 0x333 color and the rest is filled with 0xeee. 9-patches scale with the size of the view that they are applied to. So you can use it as a background or src