Develop Reference

Image in splash screen is repeated

I'm intending to show a very simple splash screen using a theme and an #drawable xml for the background.
Styles.xml
<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
<item name="android:windowBackground">#color/white</item>
<item name="android:background">#drawable/splashx</item>
</style>
Splashx.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<bitmap
android:gravity="center"
android:src="#drawable/splash"/>
</item>
</layer-list>
For some reason, the top few pixels are repeated when the splash screen is displayed, like so:
The actual image that I used obviously doesn't have this distortion on top (the little triangle on top which is essentially the hand and the club repeated from below). I've tried it with a few other images, too. Same mysteria.
Any ideas?

Why don't you try shifting your image from drawable to the mipmap folder? and then adding the mipmap image as a bitmap to your layer list.
<?xml version="1.0" encoding="utf-8"?>
<item
android:drawable="#color/your_background_color"/>
<item>
<bitmap
android:gravity="center"
android:src="#mipmap/your_image"/>
</item>
See the link here: https://www.bignerdranch.com/blog/splash-screens-the-right-way/

background drawable for using layer-list not wrapping the parent screen

I am trying to re-create a splash screen to conform to Google standard. I tried creating a background drawable for my splash screen which I'll be setting in theme itself. But I am looking for a way to make the bitmap match the parent.
Below is my drawable code: splash_screen_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:gravity="center">
<bitmap android:src="#drawable/logo_show" android:gravity="center" />
</item>
</layer-list>
Here is code where I am setting this drawable as background of an activity:
<style name="SpTheme" parent="SearchActivityTheme.NoActionBar">
<item name="colorPrimaryDark">#color/colorAccentXDark</item>
<item name="android:alertDialogTheme">#style/AlertDialogTheme</item>
<item name="android:windowBackground">#drawable/splash_screen_bg</item>
</style>

You can't scale image in bitmap. It isn't ImageView so it hasn't scaleType attribute. Your image will scale depending on folder you put it (drawable-xdpi,drawable-nodpi,...). You just can set backround fill color to what you need.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="#color/colorPrimary"/>
<item android:gravity="center">
<bitmap android:src="#drawable/logo_show" android:gravity="center" />
</item>
</layer-list>

Changing Color State on an "ImageToggle" Button

I currently have a set of ToggleButtons, enclosed by a RadioGroup, with each button referring to a selector that changes the color of the button state, and writing code to implement the radio-buttonesque behavior. This works great. (EDIT: I should mention that the selector is what the android:background element of the button is referred to)
The Selector is something like this
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/gold"
android:state_checked="true" />
<item android:drawable="#color/white" />
</selector>
Now I want a second set of buttons to have the exact same behavior. The catch is that this time, I want Images on some of them, not text.
There are lots of StackOverflow posts on how to change the Image based on the Button's state but I don't want to change the image based on the state. I want to change the color of the button based on the state (the images have transparent backgrounds).
I'm really trying to avoid modifying the button images themselves.
I believe the solution involves making a selector with a layer-list but this is new territory for me.

Create a xml named colors.xml in res/values folder:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="red">#ff0000</color>
<color name="green">#00ff00</color>
</resources>
In drawable folder, create a xml file my_btn_toggle.xml:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="false" android:drawable="#color/red" />
<item android:state_checked="true" android:drawable="#color/green" />
</selector>
and in xml section define your toggle button:
<ToggleButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btntoggle"
android:background="#drawable/my_btn_toggle"/>

I think you are looking for tinting attributes - mentioned here.
In your case, try to set ColoStateList to android:tint attribute. In ColorStateList doc you have example that shows color selector - like drawable selector, but for colors.
(I'm not sure it's already support pre-Lollipop devices or you should do it programatically with PorterDuff filters for older versions.)

What apparently one needs to do is create a layered drawable in the selector like this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true">
<layer-list>
<item android:drawable="#color/gold"
android:gravity="fill"/>
<item android:drawable="#drawable/image"
android:gravity="fill"/>
</layer-list>
</item>
<item android:state_checked="false">
<layer-list>
<item android:drawable="#color/white"
android:gravity="fill"/>
<item android:drawable="#drawable/image"
android:gravity="fill"/>
</layer-list>
</item>
</selector>
The standard approach to variable state button selectors is what Priyank mentions above. Just the graphic must be transparent and declared like above, such that it will be layered with a background color to pull off the color state change

How to deal with scaling and transparency of a bitmap as android:windowBackground

I am trying to set a global background image for my android application. The image is a PNG file with transparency. I set it in the following way:
<style name="MyAppTheme" parent="#style/Theme.AppCompat">
<item name="android:windowBackground">#drawable/background_main</item>
</style>
And drawable/background_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<bitmap
xmlns:android="http://schemas.android.com/apk/res/android"
android:src="#drawable/background_main_bitmap"
android:gravity="bottom|center_horizontal" />
My PNG file should sit at the bottom of the screen always, being scaled to match the screen size always. With the above code, however, I am facing two problems.
The transparent background of the PNG file is black while I want it to be white.
The PNG file is larger than the screen width and hence, I can only see a portion of it. It is not scaled to match the width of the screen.
How can I accomplish these two things, possibly without havin to write Java code? (Although it would be better than nothing...)

Problem #1 can be solved with a layer-list in drawable/background_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<solid android:color="#ffffff"/>
</shape>
</item>
<item>
<bitmap
xmlns:android="http://schemas.android.com/apk/res/android"
android:src="#drawable/background_main_bitmap"
android:gravity="bottom|center_horizontal|fill_horizontal" />
</item>
</layer-list>
Problem #2 remains though...

just change the property of android:gravity like following:
<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:src="#drawable/flush"
android:gravity="fill_horizontal|fill_vertical"/>

Actually, using layer-list may give you expected scaling:
All drawable items are scaled to fit the size of the containing View, by default. Thus, placing your images in a layer list at different positions might increase the size of the View and some images scale as appropriate. To avoid scaling items in the list, use a <bitmap> element inside the <item> element to specify the drawable and define the gravity to something that does not scale, such as "center"
Thus, the following drawable will suit your request:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#android:color/white" />
<item android:drawable="#drawable/background_main_bitmap" />
</layer-list>

Creating a Custom Compound Button Bar

I have to create a custom compound button bar control in Android like the one here. To create a button bar like this, I am thinking of extending a LinearLayout and add my buttons to it. The buttons have a black background but with a gradient fill; I am not keen on using PNGs since the color of the buttons can change at runtime.
How can I get similar effect in Android?
Thanks.

u have to use imageview as button.
set two image view you can change color the button
use xml file to src of that imageview like
<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="false"
android:drawable="#drawable/back_normal" />
<item android:state_pressed="true"
android:drawable="#drawable/back_pressed" />
</selector>
for gredient style.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient android:angle="90" android:startColor="#663300"
android:centerColor="#330000"
android:endColor="#330000"/>
</shape>
thats it.