Develop Reference

Change hover image button without selector on android

I have many buttons for my view. Each button has different image resource. I want to change the click and hover effect for each button like this:
Button 1
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/btn1_selector"
android:text="name"
/>
btn1_selector:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/hover_btn" android:state_pressed="true"></item>
<item android:drawable="#drawable/hover_btn" android:state_focused="true">/item>
<item android:drawable="#drawable/btn1"></item>
</selector>
Button 2
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/btn2_selector"
android:text="name"
/>
btn2_selector:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/hover_btn" android:state_pressed="true"></item>
<item android:drawable="#drawable/hover_btn" android:state_focused="true">/item>
<item android:drawable="#drawable/btn2"></item>
</selector>
// etc...
The problem is that I have to create many selectors for all buttons. But I just need to change the hover state for all of them with 1 image hover_btn.png. Is there any way to have a hover state by default without creating all selectors for all buttons?

Changing Button UI in Android

I am trying to customize a Button UI in Android.
I tried the following things:
btn.setBackgroundColor
btn.setBackgroundResource
btn.setBackgroundColor
But all of these are increasing the size of the Button, and because of that the Buttons near by can not be segregated (??).
Please suggest something.

If you want to apply a Hover effect then you have to do this in your XML where button layout is like
Button
android:id="#+id/xyz"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginTop="15dp"
android:background="#drawable/general_btn_hover_effect"
android:onClick="somefunction"
android:text="#string/search_number"
android:textColor="#ffffff"
android:textSize="20sp"
/>
Notice android:background="#drawable/general_btn_hover_effect" there and then in #drawable folder make a general_btn_hover_effect.xml and write this into it
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/blank_normal_bg" android:state_focused="true" android:state_pressed="false"/>
<item android:drawable="#drawable/blank_hover_bg" android:state_focused="true" android:state_pressed="true"/>
<item android:drawable="#drawable/blank_hover_bg" android:state_focused="false" android:state_pressed="true"/>
<item android:drawable="#drawable/blank_normal_bg"/>
</selector>

Changing background color can not change size of button. Maybe you changed size in xml layout. Check again

custom button selector

Im trying to create custom button and i cant see my problem.
i create in res/drawable/ custom.xml
<?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/forwardpress"></item>
<item android:state_focused="true" android:drawable="#drawable/forwardhover"></item>
<item android:drawable="#drawable/forward"></item>
</selector>
and on main.xml i have this button
<Button
android:id="#+id/bFor"
android:background="#drawable/custom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="right" />
The problem is, button is stay presed without animation, (yes i have 3 diferent picture in drawable folder)

Funny thing is, I for one button works but the other does not
i try this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/backpress" android:state_pressed="true"/>
<item android:drawable="#drawable/back"/>
its work but for second button i try the same process
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/forwardpress" android:state_pressed="true"/>
<item android:drawable="#drawable/forward"/>
</selector>
for second button doesnt work, wierd...

Clean and build your project again.

Cannot change focus/state for button png using selector element

Android Studio 0.3.7
Hello,
I have created 2 buttons png and patched using draw9patch.
The buttons will indicate whether the buttons is pressed or unpressed.
I have the following buttons_colours.xml in my values directory
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="false"
android:state_pressed="true"
android:drawable="#drawable/rd_btn_press"/> <!-- pressed -->
<item android:state_focused="true"
android:state_pressed="false"
android:drawable="#drawable/rd_btn"/> <!-- unpressed -->
<!-- Default -->
<item android:drawable="#drawable/rd_btn"/>
</selector>
In my layout for the button I have this:
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start"
android:id="#+id/button"
android:layout_gravity="center_horizontal"
android:background="#drawable/rd_btn"/>
Problem 1: I get an element selector must be declared in my buttons_colours.xml
Problem 2: Not sure if this is related to problem 1, but the button never changes to my rd_btn_press state when I press it.
Many thanks for any suggestions,

you have set wrong background for the button. Replace #drawable/rd_btn with `buttons_colours :
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start"
android:id="#+id/button"
android:layout_gravity="center_horizontal"
android:background="#drawable/buttons_colours"/>
also, I don't know why you have two states in your items in the selector. Here an example of working selector:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/rd_btn_press"
android:state_pressed="true" />
<item android:drawable="#drawable/rd_btn"
android:state_focused="true" />
<item android:drawable="#drawable/rd_btn" />
</selector>

changing image of imagebutton till it is pressed

I want that in my android application, the ImageButton change its image when it is pressed and released, and when it is pressed released again, the image for ImageButton will be changed back , how to do that?
I have tried it with selector.
But it is not working.
Please anyone help me.
Thanks

make file in drawable folder a.xml ::
<?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/oneImage" />
<item
android:state_pressed="false"
android:drawable="#drawable/secondImage" />
</selector>
and in your main file :: button have implment following code ::
<ImageButton android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="anything"
android:id="#+id/first"
android:background="#drawable/a"
android:textColor="#FFFFFF"
android:textStyle="bold"
></ImageButton>

use the following selector.
<?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/pressedImage"/>
<item
android:state_focused="true"
android:drawable="#drawable/normalImage"/>
<item android:drawable="#drawable/normalImage"/>
</selector>