Develop Reference

Android: Add neon glow effect to button

I want to have a glow effect on button (in android studio) as shown in image:
I didn't want an image for the background, so to get this effect, I have tried to do in xml file. I have added a stroke for the button and provide a shadow to the button (with same color as stroke).
I have used a linear gradient with 90 degree angle with start and end color same as the stroke, center color same as background color. Please see the code:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<layer-list>
<item android:right="5dp" android:top="0dp">
<shape>
<corners android:radius="50dp" />
<gradient
android:angle="45"
android:startColor="#8008c3fa"
android:endColor="#8008c3fa"
android:type="linear"
/>
</shape>
</item>
<item android:bottom="5dp" android:left="6dp" android:right="10dp" android:top="5dp">
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners
android:radius="50dp"
/>
<gradient
android:angle="90"
android:centerX="50%"
android:centerColor="#color/trans_parent"
android:startColor="#8008c3fa"
android:endColor="#8008c3fa"
android:type="linear"
/>
<padding
android:left="0dp"
android:top="0dp"
android:right="0dp"
android:bottom="0dp"
/>
<size
android:width="270dp"
android:height="60dp"
/>
<stroke
android:width="2.5dp"
android:color="#08c3fa"
/>
</shape>
</item>
</layer-list>
</item>
</selector>
For the above xml, I got the below result:
Though the design and the result images look totally different, I think if we increase the center color height and keep a fadeout effect to the shadow, it can work. But I'm not able to do the same.

you can increase the center color height and keep a fadeout effect to the shadow by adding a nother item to the layer-list.
The first item makes the gradient for the upper bound, the rest is transparent and the second item makes the gradient for the lower bound the same way.
I added two more items to fill the left and the right semicircle.
I changed a few colours to enhance the effect but didnt trie too long, i think one could do alot more with more items and better colours :)
Cheers, Josh
the final result:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<layer-list>
<item android:right="5dp" android:top="0dp">
<shape>
<corners android:radius="50dp" />
<gradient
android:centerX="70%"
android:startColor="#804CD6FF"
android:centerColor="#8004485C"
android:endColor="#804CD6FF"
android:type="linear"
/>
</shape>
</item>
<item android:bottom="5dp" android:left="6dp" android:right="10dp" android:top="5dp">
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners
android:radius="50dp"
/>
<gradient
android:angle="90"
android:centerX="30%"
android:centerColor="#color/transparent"
android:startColor="#8008c3fa"
android:endColor="#color/transparent"
android:type="linear"
/>
<size
android:width="270dp"
android:height="60dp"
/>
<stroke
android:width="2.5dp"
android:color="#08c3fa"
/>
</shape>
</item>
<item android:bottom="5dp" android:left="6dp" android:right="10dp" android:top="5dp">
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners
android:radius="50dp"
/>
<gradient
android:angle="90"
android:centerX="70%"
android:centerColor="#color/transparent"
android:startColor="#color/transparent"
android:endColor="#8008c3fa"
android:type="linear"
/>
<size
android:width="270dp"
android:height="60dp"
/>
</shape>
</item>
<!-- the glow for the half circles, possible with radius as well. I liked
android:type="sweep" better because radius tends to fade out.-->
<item android:bottom="5dp" android:left="6dp" android:right="10dp" android:top="5dp">
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners
android:radius="50dp"
/>
<gradient
android:angle="360"
android:centerX="5%"
android:centerColor="#8008c3fa"
android:startColor="#color/transparent"
android:endColor="#color/transparent"
android:gradientRadius="360"
android:type="sweep"
/>
<size
android:width="270dp"
android:height="60dp"
/>
</shape>
</item>
<item android:bottom="5dp" android:left="6dp" android:right="10dp" android:top="5dp">
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<corners
android:radius="50dp"
/>
<gradient
android:angle="360"
android:centerX="95%"
android:centerColor="#color/transparent"
android:startColor="#8008c3fa"
android:endColor="#8008c3fa"
android:gradientRadius="360"
android:type="sweep"
/>
<size
android:width="270dp"
android:height="60dp"
/>
</shape>
</item>
</layer-list>
</item>
</selector>

I know it has been a while but if anyone is still interested in this effect, here is a custom view library I made which was inspired by this question:
Glowing and Neon Button
It also has animated disable and enable methods as seen in the photo.
It's MIT Licensed, so do whatever you want with it. hope this helps someone.

If you want to have improved neon Buttons with a solid that has different gradients too. Take a look on this related post I answered. I used the suggested library from "#Mehran B" and combined it with a custom drawable and a transparent stroke to make it more modifiable. As you can see in the samples below the gradients from the solids and shadows are separated and thus more flexible:

Add two colors in a border (android)?

im looking for a way, How to add two colors inside a border
just like what this person has done on this image CSS 2-color border but im more intrested to know how you achieve this in android.
The goal is to have something that looks like this https://github.com/lorensr/segmented-control for my app .But with two different colors inside the border that switches between each other when the button is focused.
Have a nice day :)

You can use layer-list and one layer with a gradient background and second layout with solid color with all side padding, like below
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape
android:shape="rectangle">
<gradient
android:angle="180"
android:endColor="#00f"
android:startColor="#f00" />
</shape>
</item>
<item
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp">
<shape
android:shape="rectangle">
<solid android:color="#0f0" />
</shape>
</item>
</layer-list>
In this example, I gave 10dp(in
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp"
) just to see the more clear, you can change value as you want.

You can use a custom xml bacground file like this and use a custom bacground

<item>
<shape android:shape="rectangle">
<corners android:radius="#dimen/_20sdp" />
<gradient
android:angle="180"
android:endColor="#color/yellow_color"
android:startColor="#color/color_red" />
</shape>
</item>
<item
android:bottom="1dp"
android:left="1dp"
android:right="1dp"
android:top="1dp">
<shape android:shape="rectangle">
<corners android:radius="#dimen/_20sdp" />
<solid android:color="#color/white_color" />
</shape>
</item>
</layer-list>```
**Two color border with round corner**

Rounded rectangle with stroke on top android drawable XML

I was trying to make a drawable using XML in android. The requirement is I need to have a rounded rectangle(all 4 corners rounded) with a stroke of 7dp height only on the top edge. I am using the following XML for that:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<stroke android:width="5dp" android:color="#color/theme_color" />
<solid android:color="#color/theme_color" />
<corners
android:radius="7dp"/>
<padding android:top="7dp"/>
</shape>
</item>
<item>
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#color/designer_cell_background" />
<solid android:color="#color/designer_cell_background" />
<corners
android:radius="7dp"
android:topRightRadius="0dp"
android:topLeftRadius="0dp"/>
<padding android:bottom="1dp"/>
</shape>
</item>
</layer-list>
I am getting this working almost OK, except that the bottomRight and bottomLeft corners are not rounded.
Question - 1 : How to get the bottom corners rounded?
Question - 2 : Is this the correct way to achieve what I actually want? Is there a better way? I am asking this because, I understand what I do here is actually making two rectangles, one on top of another, the second one is being slightly lowered from the top edge of the first rectangle so that the color of the first rectangle appears as a line on top of the second one. And then adding corner radius to each rectangle individually. I don't think it is the right solution. But I failed when I tried to add a stroke of 7dp width to the top of a rounded rectangle. The stroke I gave was appearing on all the edges.
EDIT
Here is what I want:
And this is what I currently get:

<stroke
android:width="1dp"
android:color="#FFFFFF" />
<solid android:color="#ffffff" />
<padding
android:left="0dp"
android:right="0dp"
android:top="0dp" />
<corners android:radius="12dp" />
</shape>
ur using the radius value increased curve shape wil increase

try this is works let me know
this tool is helps me you can also get help from it
http://angrytools.com/android/button/
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<stroke android:width="5dp" android:color="#color/theme_color" />
<solid android:color="#color/theme_color" />
<corners
android:radius="7dp"/>
<padding android:top="7dp"/>
</shape>
</item>
<item>
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#color/designer_cell_background" />
<solid android:color="#color/designer_cell_background" />
<corners
android:topLeftRadius="0dp"
android:topRightRadius="0dp"
android:bottomLeftRadius="7dp"
android:bottomRightRadius="7dp"/>
<padding android:bottom="1dp"/>
</shape>
</item>

i think you should create 2 shapes the black one and the red one, just overlay the other shape to become the image you're looking for. you can't accomplish that with one shape in android.

How to make Shape like this?

I want to get shape similar to what you can see below. The thing I am missing is the header color (the color behind Anonymous text). I've reproduced what I wanted by simply moving mouse over second textview which is now highlighted and makes this effect :)
Current code:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke android:width="2dp" android:color="#000000" />
<gradient android:startColor="#898989" android:endColor="#B5B5B5" android:angle="270"/>
<corners android:bottomRightRadius="7dp" android:bottomLeftRadius="7dp"
android:topLeftRadius="7dp" android:topRightRadius="7dp"/>
</shape>

You need to use a Layer List that contains two drawables.
For example, the first will cover the whole shape, and the second will overlay it but with android:top="10dp" set, to create an offset showing the underlying first shape
Edit:
Like so:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape android:shape="rectangle" >
<stroke
android:width="2dp"
android:color="#000000" />
<solid android:color="#00ff00" />
<corners
android:bottomLeftRadius="7dp"
android:bottomRightRadius="7dp" />
</shape>
</item>
<item
android:bottom="2dp"
android:left="2dp"
android:right="2dp"
android:top="20dp">
<shape android:shape="rectangle" >
<gradient
android:angle="270"
android:endColor="#B5B5B5"
android:startColor="#898989" />
<corners
android:bottomLeftRadius="7dp"
android:bottomRightRadius="7dp" />
</shape>
</item>
</layer-list>

Use a LinearLayout and place two TextView with different shapes as background.
The first one having its upper corners rounded and the second one its bottom corners.

this tools might be helpful further in development
http://angrytools.com/
http://android-ui-utils.googlecode.com/hg/asset-studio/dist/index.html

Why i am not able to create the round border for specific corner?

In My android xml layout i am applying the border by using the borderframe.xml as a background.
borderframe.xml file is looks like below:
<?xml version="1.0" encoding="UTF-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android">
<stroke
android:width="1dip"
android:color="#ffffff"/>
<solid
android:color="#95865F"/>
<corners
android:radius="10px"/>
<padding
android:left="1dp"
android:right="1dp"
android:top="1dp"
android:bottom="1dp"/>
</shape>
Now, While there is a android:radius="10px" then it is works but while i am going to give round shape to specific corner only then it not works.
There is no any erro message in log cat but i found error in eclipse like:
The graphics preview in the layout editor may not be accurate:
* Different corner sizes are not supported in Path.addRoundRect.
Even if there is no padding in that xml file then also i am not able to see any border.
Now, what should i have to do for it ?
and whats the sollution of it if i want to create the rounded border for only topLeftcorner and bottomLeftCorner. ?
Thanks.

I am also facing the same problem. But for that I use layer-list. I post my answer here which may help you. Please check output screen
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#c1c1c1" />
<solid android:color="#c1c1c1" />
<corners android:radius="20dp"/>
</shape>
</item>
<item android:right="20dp"
>
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#c1c1c1" />
<solid android:color="#c1c1c1" />
</shape>
</item>
</layer-list>

You'll have to do that, assuming you only want a rounded top left corner:
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="20sp"
android:topRightRadius="0dp"
android:bottomRightRadius="0dp"
android:bottomLeftRadius="0dp" />
<gradient
android:startColor="#color/logo_blue"
android:endColor="#color/blue"
android:angle="0"/>
</shape>
Explanation: Every corner must (initially) be provided a corner radius greater than 1, or else no corners are rounded. If you want specific corners to not be rounded, a work-around is to use android:radius to set a default corner radius greater than 1, but then override each and every corner with the values you really want, providing zero ("0dp") where you don't want rounded corners. [source]
As a consequence, you need to define your drawable as:
<?xml version="1.0" encoding="UTF-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android">
<stroke
android:width="1dip"
android:color="#ffffff"/>
<solid
android:color="#95865F"/>
<corners
android:radius="10px"
android:topRightRadius="0dp"
android:bottomRightRadius="0dp" />
<padding
android:left="1dp"
android:right="1dp"
android:top="1dp"
android:bottom="1dp"/>
</shape>
Update
From The Shape Drawable Resource Android Documentation:
android:radius
Dimension. The radius for all corners, as a dimension
value or dimension resource. This is overridden for each corner by the
following attributes.
overridden is the keyword for your problem…

I'm using SDK tools 19, platform-tools 11 and running the app in Android 4.0.3. Using the following XML works for me:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#dd000000"/>
<padding
android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp" />
<corners
android:bottomLeftRadius="25dp"
android:bottomRightRadius="25dp"
android:topLeftRadius="0dp"
android:topRightRadius="0dp" />
</shape>
The Eclipse warning is about not being able to show the preview. In het app it shows up correct.

I got the solution on one of the forums. I solved it by commenting each corner & adding to the xml in drawable. I have retained commented code below only for understanding.
XML Code-
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<solid android:color="#fd2149" />
<stroke android:width="1dip" android:color="#ffd102"/>
<!-- <corners
android:bottomLeftRadius="8dp"
android:bottomRightRadius="8dp"
android:topLeftRadius="8dp"
android:topRightRadius="8dp" />
-->
<corners android:radius="8dp" />
</shape>
---Edited-
The above code is my back.xml in drawable folder and if required you can add padding to the same back.xml. For those who are new developers, the back.xml is referenced from your layout file as follows
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tableLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textSize="20sp"
android:scrollbars="vertical"
android:background="#drawable/back">
Hope this helps.