Develop Reference

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..

How to add a click effect to a button on click event?

How would I add a click effect similar to the below image for a button click event?
The button in my activity already has it's background set to an image so I'm not sure how I would add a background of a state also as in this tutorial:
Android Button color changing on onClick?

You need two image, one for normal state and another for pressed state. At first create a selector
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/pressed_image" android:state_pressed="true"/>
<item android:drawable="#drawable/normal_image"/>
</selector>
Add this selector in your button as a background.

Here's something similar. I am not sure though, if this fits your solution.
EDIT: It uses selector, just like #Raghunandan suggested above.

ImageButton Android round Image without square border

When I create a round ImageButton, there is also a transparent square border around the object. It shows wenn I click on the ImageButton in the Graphical Layout of the xml file.
How can I remove this border?

You can set custom background for the button,
You can specify two images(rounded) for the two states(pressed and not pressed), so that the only two round shaped images wold cover your image, default rectangular would go. I hope It helps you.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/skyblueBackground" android:state_pressed="true" />
<item android:drawable="#color/transparentBackground" />
</selector>
I tried with colors, you can use images. You just want to save it in your drowable folder and specify it for the background of button

Holo theme and custom background for my button

I have some problems to add the blue color over the button when the user press it. It works if there is no drawable in background for this button but in my case, i have to add a custom background and i want the blue color when the user clicks on the button.
Here is my code
<Button
android:id="#+id/create_profile"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/info_account"
android:layout_centerHorizontal="true"
android:background="#drawable/btn_create_profile" />

Blue color is not something that platform draws for you. Standard buttons have a selector drawable as their background, which involves a set of images for a view. So for button for example it is a standard button image, pressed button image (with blue overlay drawn above), disabled (half transparent), etc.
Button knows it's current state and displays appropriate image.
So what you want to do is to draw a pressed button yourself and create a selector drawable like this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="#drawable/your_pressed_button/>
<item android:drawable="#drawable/your_normal_button/>
</selector>
I believe it's worth reading about Drawable Resources. You can also find examples of button states generated here.

You should make custom drawable :
For this you have to simply create a xml file in your drawable folder and write :
<?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/ic_back" />
<item android:state_pressed="true"
android:drawable="#drawable/ic_back_pressed" />
<item android:state_focused="true"
android:drawable="#drawable/ic_back_pressed" />
</selector>
and now set this drawable in background of your button.
Here, in normal state background id ic_back
and pressed and focus state background is ic_back_pressed
For creating solid drawable shapes (for example, if you want solid color backround as drawable you can go here.. )

Android Button lighting border

Is it any way to light the borders of a button whilte pressing on it (you can see the effect when you place an ImageView and click on it). Needed to say, that i have a background on the buttone.

You need to have two images and assign each of them to one button state. You should make a state list drawable: just create an xml file "button.xml" and place it in your res/drawable folder. The xml would look like this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:drawable="#drawable/buttonwithglow" />
<item android:state_pressed="false"
android:drawable="#drawable/buttonwithoutglow" />
</selector>

Use a StateListDrawable.