Android uses selector custom buttons

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Android uses selector custom buttons

When you previously defined a button, you would always use a custom button to get it in the activity and then rewrite the button's Ontouchlistener and then toggle the background image of the button. Not only does this make the code in the activity bloated, but the button cannot be reused.

Later came into contact with the Android selector very useful, the following details how to use selector, first create an XML file under the Res\drawable folder

650) this.width=650; "Src=" http://img.blog.csdn.net/20141020204242187?watermark/2/text/ ahr0cdovl2jsb2cuy3nkbi5uzxqvdtaxmtc4mjuyoa==/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/gravity/ Center "/>

Then add the image you want to apply to the button in the drawable file, including the pressed picture and the not-on-time picture.

Then add it in the file: drawable

<?xml version= "1.0"  encoding= "Utf-8"? ><selector xmlns:android= "http// Schemas.android.com/apk/res/android " >     <!--defines the picture to display when the button gets focus-->      <item                    android:state_focused =  "true"                     android:drawable =   "@drawable/image_btn_down"/>        <!--define a realistic picture when the button is selected  -->        <item                    android:state_selected =  " True "                    android:drawable =  "@drawable/image_btn_down "/>    <!--define the displayed picture when the button is clicked-->             <item                    android:state_pressed =  "true"                      android:drawable =  "@drawable/image_btn_down"/>     <!-- The default button is not selected when the picture is displayed-->                <item android:drawable =  "@drawable/image_btn_up"  />   </ Selector>

The file name is called Button_selector.xml, after the completion of the button you want to apply the Drawable property to @drawable/button_selector can be as follows:

<Button                         android:id= "@+id/button_add"                           android:layout_width= "115DP"                          android:layout_height= "Wrap_content"                          android:layout_margin= "5px"                          android: layout_weight= "1"                          android:background= "@drawable/button_selector"                          android: text= "Customize Button"  />

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Android uses selector custom buttons