Develop Reference

Create circle button with custom background image

So I have a background texture (image) that I put on all of my buttons. I want to create a circular button with an icon that retains this background texture.
So far, I have noticed it isn't supported to do this on the shape side:
<shape android:shape="rectangle">
<solid android:color="#drawable/myTexture" /> <!-- this isn't supported -->
</shape>
Lastly I would otherwise try to use <layer-list>, however as I stated above, I need to still crop the texture to my shape I'm creating.
Is the only way to do this to make my own circular images that combine the background texture and the button icon? This seems a bit excessive, as I would think there should be a programmatic way to accomplish this, but I could be wrong.
Here is an example of what I mean above:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/myTexture" />
<item>
<shape android:shape="rectangle">
<corners android:radius="40dp" />
<size
android:height="80dp"
android:width="80dp" />
<solid android:color="#color/black" />
</shape>
</item>
</layer-list>
In the picture bellow: black is the circle shape, silver is the texture/image (black for contrast)

I haven't solved the programmatic way, but I did end up creating new graphics that combined the icon and the background texture. Using this singular image, I was able to create circular ImageButton's.

Is it ok to use png as a button background?

Is there is any drawback of using png as a background for a Button or EditText. Or should I write a code for XML for background of Button or EditText. I want to know which is the better way.

You can use color,drawable file or image as background
Color
android:background="#2F6699"
Drawable
android:background="#drawable/edittext_background"
Image
android:background="#drawable/ic_launcher"
Drawable file
<?xml version="1.0" encoding="utf-8" ?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:thickness="0dp"
android:shape="rectangle">
<stroke android:width="2dp"
android:color="#2F6699"/>
<corners android:radius="3dp" />
<gradient android:startColor="#C8C8C8"
android:endColor="#FFFFFF"
android:type="linear"
android:angle="270"/>
</shape>

I think you can try 9 patch image for button and edittext background.
9 Patch:
9-Patch images are stretchable, repeatable images reduced to their
smallest size; users draw a right and bottom, solid black 1 pixel
border to tell the system how to place the content within the image.
For more information visit this post:
Utility of android nine patch

just put png image into drawable, and than set it in xml via android:background="#drawable/image.png"

Use it in button properties
android:background="#drawable/imageName"

rounded view's corners android, NOT round background

I know how to give round borders using XML in Android. I thought it would be cool to make the radius of one corner of my textView excessively large. The problem is, the text keep spilling out. Can I make my textview have a TRULY round corner? (Not just the background). If this was CSS this would be so easy. I am new to Android.
So in terms of CSS, I want to set my overflow to hidden so to speak.
Please help me.

In short, no. All Views are rectangular and fit in bounding boxes.
The best way to achieve rounded corners is the way you mention; using a shape drawable with corner radius set as the background to your TextView.

Like ataulm said, all Views are rectangular.
Create a shape drawable allows you to create a background with rounded corners. You'd have to use padding to make sure the text doesn't clip in certain areas.
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#ffffffff"/>
<stroke android:width="4dp"
android:color="#ff0000"/>
<padding android:left="4dp"
android:top="4dp"
android:right="4dp"
android:bottom="4dp"/>
<corners android:bottomRightRadius="7dp"
android:bottomLeftRadius="7dp"
android:topLeftRadius="7dp"
android:topRightRadius="7dp"/>
</shape>

Create Single Pixel Rectangle

I want to create a single pixel stroke rectangle, but android is rendering two pixels.
Here is my xml code:
<item>
<shape android:shape="rectangle">
<solid android:color="#FFF" />
<stroke android:width="1px" android:color="#000" />
</shape>
</item>
Here is the top left corner of what is rendered:
My only guess is that this background is not lining up with the device pixels.

So, essentially a line? You could try using something like
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="line">
<solid android:color="#FFF" />
<stroke android:width="1px" android:color="#000"/>
</shape>
EDIT: whoops, think I misunderstood. You could always just draw a rectangle using lines though I guess.

px has different meanings on different screen sizes. I'm guessing this is on a bigger screen? Try changing the unit to dp and the anti-aliasing affect should disappear
edit: actually this wont solve your issue if you just want the physical thickness of the line on your screen to be half its current size. It will make it look equivalent on all types of screen though and keep a solid appearance, if that's your complaint

This was caused by the bi-linear filtration introduced in honeycomb and later. There are two solutions:
Disable all hardware acceleration in the manifest (bad idea) with this tag
android:hardwareAccelerated="false"
Use the xml attribute on affected views to render with software only
android:layerType="software"
I found the solution here:
Blurred 1dip shape lines (borders) on Android

Dynamic radial circle in the middle of the screen

Why is it so difficult to make this little thing work? : /
I want to create something like android's lock screen.
I have an XML:
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval" >
<stroke
android:width="#dimen/dp_5"
android:color="#color/black" />
<gradient
android:type="radial"
android:startColor="#color/green"
android:endColor="#color/red"
android:gradientRadius="#dimen/dp_50" />
</shape>
This circle is a background of a TextView, so the following happens:
1. wrap_content creates a little circle in the center of the screen
2. fill_parent creates an elipse taking the whole screen, instead of a circle
In addition I would like to change the startColor and endColor programmatically - Didn't find any documentations\threads which solved this SIMPLE issue.