Selector in Android

Android Background Selector Selector Usage Summary (2011-04-19 13:40:00) reproduced

Tags: &NBSP; android&NBSP; selector< Span class= "SG_TXTB" > &NBSP; Background selector &NBSP; It

Category:  java/vb/ Android

A Create XML file, location:drawable/xxx.xml, in the same directory remember to put related pictures

<?xml version= "1.0" encoding= "Utf-8"?>
<selector xmlns:android= "Http://schemas.android.com/apk/res/android" >
<!--Background picture By default-
<item android:drawable= "@drawable/pic1"/>&NBSP;&NBSP;&NBSP;
<!--  Background picture without focus  -->  
  < Item android:state_window_focused= "false"  &NBSP;&NBSP;
         android:drawable= "@drawable/pic1"/> &NBSP;&NBSP;
<!--  the background picture when you get focus in non-touch mode and click   -->  
  <item android:state_focused= "true"  android:state_ Pressed= "true"   android:drawable= "@drawable/pic2"/>&NBSP;

<!-- the background picture when clicked in touch mode --

<item android:state_focused= "false" android:state_pressed= "true" android:drawable= "@drawable/pic3"/>

<!--picture background When selected- -

<item android:state_selected= "true" android:drawable= "@drawable/pic4"/>

<!-- picture background when getting focus -

<item android:state_focused= "true" android:drawable= "@drawable/pic5"/>
</selector>
two . Use XML file:

1. Method One: Configure the android:listselector= "@drawable/xxx in the ListView
Or add properties to the ListView item android:background= "@drawable/xxx"

2. Method Two:drawable drawable = Getresources (). getdrawable (R.DRAWABLE.XXX);
listview.setselector (drawable); however, this can occur when the list is sometimes black and needs to be added:android:cachecolorhint= "@android: color/ Transparent "make it transparent.

Related properties:

Android:state_selected is selected
Android:state_focused is gaining focus
Android:state_pressed is click
Android:state_enabled is the set response event , which refers to all events

The selector effect of the button can also be set according to these states . You can also set selector to change The state of text in a button.

The following is the text effect in the configuration button:
Drawable/button_font.xml
<?xml version= "1.0" encoding= "Utf-8"?>
<selector xmlns:android= "Http://schemas.android.com/apk/res/android" >
<item android:state_selected= "true" android:color= "#FFF"/>
<item android:state_focused= "true" android:color= "#FFF"/>
<item android:state_pressed= "true" android:color= "#FFF"/>
<item android:color= "#000"/>
</selector>
ButtonYou can also achieve more complex effects, such as gradients
Drawable/button_color.xml
<?xml version= "1.0" encoding= "Utf-8"?>
<selector xmlns:android= "Http://schemas.android.com/apk/res/android" >       &NBSP;/&NBSP
<item android:state_pressed= "true" >// definition when button  in Span lang= "en-US" >pressed  State of the form.  
   < Span class= "Apple-converted-space" >             &NBSP;<SHAPE>

                  <gradient  android:startcolor=" #8600ff "/>&NBSP;

<stroke android:width= "2DP" android:color= "#000000"/&G T
<corners android:radius= "5DP"/>
<padding android:left= "10DP" android:top= "10DP" /c4>
android:bottom= "10DP" android:right= "10DP"/&G  T
</shape> </item>
<item android:state_focused= "true" >// Define whenButton getsThe shape of focus
<shape>
<gradient android:startcolor= "#eac100"/>
<stroke android:width= "2DP" android:color= "#333333" color= "#ffffff"/>
<corners android:radius= "8DP"/>
<padding android:left= "10DP" android:top= "10DP"
Android:bottom= "10DP" android:right= "10DP"/>       < Span class= "Apple-converted-space" >   &NBSP;&NBSP;&NBSP;
                  </shape>  
 </item>
</selector> 
Finally, you need to include   button xml file added two items. For example main.xml  file, required in <button/ > Riga two android: Focusable= "true" android:background= "@drawable/button_color"

Selector in Android