Introduction to Android Development (14) Display Image 14.2 Imageswitcher

The previous section describes how to combine the use of gallery and ImageView. However, sometimes when you click a picture in gallery, you may not want a picture to "suddenly" appear in the ImageView. For example, you might want to set some toggle animation for a picture. At this point, you need to use Imageswitcher and gallery. The following shows how to use Imageswitcher.

1. Create a project, Imageswitcher.

2. Code in the Main.xml.

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android=    
"http://schemas.android.com/apk/" Res/android " 
    android:layout_width=" fill_parent " 
    android:layout_height=" fill_parent " 
    android:o" rientation= "vertical" >    
           
    <textview 
        android:layout_width= "Fill_parent" 
        Wrap_content " 
        android:text=" Images of San Francisco "/> <gallery android:id=" 
        @+id/gallery1 " 
        android:layout_width= "fill_parent" 
        android:layout_height= "wrap_content"/>    
       
    <imageswitcher 
        android:id= "@+id/switcher1" 
        android:layout_width= "fill_parent" 
        android:layout_height= "Fill_" Parent " 
        android:layout_alignparentleft=" true " 
        android:layout_alignparentright=" true " 
        Android: Layout_alignparentbottom= "true"/>    
       
</LinearLayout>

3. Create a new file under the Res/values folder, Attrs.xml.

4. Code in the Attrs.xml.

<?xml version= "1.0" encoding= "Utf-8"?>    
<resources>    
    <declare-styleable name= "Gallery1" >    
        <attr name= "Android:galleryitembackground"/>    
    </declare-styleable>    
</resources>

5. Put some pictures in the res/drawable-mdpi.