I currently have a keypad in my application 0 - 9, I require an on and off state for each button.
To do this I've used a StateList as follows:
<?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/dialpad_1_off" />
<item android:state_pressed="true"
android:drawable="#drawable/dialpad_1_on" />
</selector>
However this is only for one button, each button has a different on and off graphic, dialpad_2_off, dialpad_3_on etc...
So do I have to create a Statelist for every single button or is there a way to do it within one Statelist XML file?
You could make the background of the image change state and use that common background for all of the buttons. Then you could use either text or an image as the button foreground.
Related
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..
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
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.
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
I want to remove the default orange focus color from GridView and from the EditText.
I have tried the android:focusable="false" but it is not working.
I think if this works as the other views, you have to use a selector in which you define various states for your view. A selector is a drawable (stored in the drawable folder) and you use it as if it was just an image. For instance, you could do something like that, if you want the focus to be red instead of orange :
selectorgridview.xml :
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:color="#color/darkred" />
<item android:color="#color/white" />
</selector>
Then, you put the background of your GridView with it : android:background="selectorgridview"
I actually never tried it on a GridView but I think it works as the other views. More infos in the docs from google