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android: Set ToggleButton background back to default

I changed the background for a ToggleButton and wish to reset it back to its default state.
Changed the background:
btn.setBackgroundColor(Color.parseColor("#FF2929"));
Tried changing it back:
btn.setBackgroundResource(0); //Just text, no button
btn.setBackgroundColor(android.R.drawable.btn_default); //Normal button not toggle

you are setting a drawable in Color, use btn.setBackgroundResource(android.R.drawable.btn_default).
This should set something in your button.

Create an xml file under drawable folder and put this code , currently the xml file name I put is check.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="#color/Your color"
android:state_checked="true" />
<!-- When not selected, use white-->
<item android:drawable="#color/Your color"
android:state_checked="false"/>
</selector>
Put this code in your toggle button layout xml
android:background="#drawable/check"
This may help you.

Why does a Button loses its original behaviour after changing its color?

I am writing an Android app and now I am styling it. I am using a custom theme which is a child of Theme.Holo.Light. I really like Theme.Holo.Light because its buttons have a special effect when you click and hold it. Like the lower button in the picture below:
Not click:
click:
The upper button has been changed color. Now when I click on that button, it doesn't have that effect. I really don't understand why. Can anyone tell me why this happens and how can I get the same effect with a colored button?
And also, the colored button seems fatter.

This is because the button uses a selector to display different colors/effects/drawables based on the state of the click. You can check out the link on Color State List Resource.
To create your own you have to create a slecetor cml file and put it in your drawables folder.
For example.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/shape_btn_default_normal_gray" android:state_enabled="true" android:state_pressed="false"/>
<item android:drawable="#drawable/shape_btn_default_pressed_gray" android:state_pressed="true"/>
<item android:drawable="#drawable/shape_btn_default_disabled_gray"/>
</selector>
or with colors
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/dark_green" android:state_enabled="true" android:state_pressed="false"/>
<item android:drawable="#color/light_green" android:state_pressed="true"/>
<item android:drawable="#color/gray"/>
</selector>
To apply this you have to set the background drawable in your layout xml like this.
<Button
android:id="#+id/my_btn"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Some text"
android:background="#drawable/selector_btn_default_gray"/>

That is the "ripple effect" of material design.You have define you own style for that effect.Link below may help you or you may search for many other answers on StackOverflow. Material effect on button with background color

It does not loses its behavior you can see after click (in your second image) the button show same scale as the above have...so by default the background is set as to show that it is button (like with padding or so) and can changes to show oncklick effect...
So when you set your desire background to button...It takes complete change on what is on presently on it and then you have to manually set onclick effect..

Android - Enable Button click on disabled state (android:enabled="false")

I have a ListView and a Button. The button should always be clickable, but the button background image should be disabled(grayed) when the ListView is empty and enabled(actual background) when the ListView has items.
I know this can be achieved from code by always setting the state enabled as true and changing the background image. But I am looking to achieve this in XML using selector.

Take a look at the following code:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:constantSize="true" android:dither="true">
<item android:drawable="#drawable/button_enabled" android:state_enabled="true" />
<item android:drawable="#drawable/button_disabled" android:state_enabled="false" />
</selector>
Use this code in your drawables folder (as an XML resource).
Afterwards you use this drawable and set it as a background property to your button. (android:background="#drawable/your_selector_file" without the .xml extension, of course)
If you need more information just consult the following link: http://developer.android.com/guide/topics/resources/drawable-resource.html#StateList

How to change check box border color via programmatically in android?

In my XML contains one CheckBox. How to change check box border color via programmatically in android.
My Sample ScreenShot is here
ScreenShot
Thanks.

you can set
check.setButtonDrawable(mContext.getResources().getDrawable(
R.drawable.radio));
in radio.xml you can set any background to your check box.
in radio.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/option_unselected" android:state_checked="false"/>
<item android:drawable="#drawable/option_selected" android:state_checked="true"/>
</selector>
here option_selected and option_selected are the graphics for selected and unslected state.
for more you can check http://developer.android.com/guide/topics/resources/drawable-resource.html#StateList

how to change button color when it is clicked in android

By default when button is clicked something like orange color will surround the button for short time, that indicates buttons is clicked. But this feature is not working when button contains background image. This is happening in list view too.why ? Any Ideas? TIA
I used setBackgroundColor(Color.BLUE); But here the color is applied and not gone...

You need to use a selector as your background resource :
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="#drawable/button_pressed" />
<item android:state_focused="true" android:drawable="#drawable/button_focus" />
<item android:drawable="#drawable/button_normal" />
</selector>
This selector makes use of 3 separate drawables to change the image of the button , you may use the same image for pressed and focuses.
You need to put this XML into your drawables directory and use it as a background for your button.
For another solution refer : Standard Android Button with a different color

i too had the same problem. so instead of setting the background color,i included three images of button in three different colors , so based on state focused,pressed,default the respective image will replace the other. and it looks like change in the color of the button.
**<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/c2"
android:state_pressed="true" />
<item android:drawable="#drawable/c1"
android:state_focused="true" />
<item android:drawable="#drawable/c1" />
</selector>**
above is the content of the xml file,which must be assigned to the background of the respective button
android:background="#drawable/drawable_button
hope this might be helpful for you