Android Learning Note 15--galley

<span id="Label3"></p><p><p><span style="line-height: 1.5;">Gallery==> Gallery View</span></p></p><p><p>Gallery and Spinnery are the same--absspinner, indicating that both Garrey and spinner are a list box.</p></p><p><p>The difference between the two is:<strong>spinner shows a vertical list box, gallery displays a horizontal list box</strong> ;</p></p><p><p>The role of spinner is for the user to choose, while gallery allows the user to drag to view the previous and next list Items.</p></p><p><p>Garrey Common XML Attributes:</p></p> <table style="height: 88px; width: 689px;" border="0" align="left"> <tbody> <tr> <td><strong><span style="font-size: 13px;">Android:animationduration</span></strong></td> <td><strong><span style="font-size: 13px;">Setanimationduration (int)</span></strong></td> <td><strong><span style="font-size: 13px;">Set the animation frame duration when a list item is toggled</span></strong></td> </tr> <tr> <td><strong><span style="font-size: 13px;">Android:gravity</span></strong></td> <td><strong><span style="font-size: 13px;">Setgravity (int)</span></strong></td> <td><strong><span style="font-size: 13px;">Set the way to it</span></strong></td> </tr> <tr> <td><strong><span style="font-size: 13px;">Android:spacing</span></strong></td> <td><strong><span style="font-size: 13px;">Setspacing (int)</span></strong></td> <td><strong><span style="font-size: 13px;">Set the spacing between list items within a gallery</span></strong></td> </tr> <tr> <td><strong><span style="font-size: 13px;">Android:unselectedalpha</span></strong></td> <td><strong><span style="font-size: 13px;">Setunselectedalpha (float)</span></strong></td> <td><strong><span style="font-size: 13px;">Sets the transparency of a list item that is not selected</span></strong></td> </tr> </tbody> </table><p><p></p></p><p><p></p></p><p><p></p></p><p><p>Attention:</p></p><p><p>Gallery usage is similar to spinner, using adapter to provide a data source, the view returned by adapter GetView () will be the list item of the gallery list;</p></p><p><p>Monitor the selection changes through the Onitemselectedlistener listener.</p></p><p><p><strong>Instance One</strong></p></p><pre class="brush:csharp;gutter:true;">Layout file = = "<linearlayout xmlns:android=" http://schemas.android.com/apk/res/android "xmlns:tools="/http Schemas.android.com/tools "android:orientation=" Vertical "android:layout_width=" match_parent "android:layout_heig ht= "match_parent" tools:context= ". Mainactivity "> <imageswitcher android:id=" @+id/switcher "android:layout_width=" 320dp "andro id:layout_height= "320dp"/> <gallery android:id= "@+id/gallery" android:layout_width= "match_parent" android:layout_height= "wrap_content" android:spacing= "3pt" android:unselectedalpha= "0.6"/></li nearlayout> code Implementation = = "package Com.example.mygrallery;import android.os.bundle;import Android.annotation.suppresslint;import Android.app.activity;import Android.app.actionbar.layoutparams;import Android.content.res.typedarray;import Android.view.menu;import Android.view.view;import android.view.ViewGroup; Import Android.view.animation.animationutils;import Android.widgeT.adapterview;import Android.widget.adapterview.onitemselectedlistener;import Android.widget.BaseAdapter;import Android.widget.gallery;import Android.widget.imageswitcher;import Android.widget.imageview;import android.widget.ViewSwitcher.ViewFactory; @SuppressWarnings ("deprecation") @SuppressLint ("inlinedapi") public class Mainactivity extends activity{private int[] imageids = new int[]{r.drawable.one, r.drawable.tw, r.drawable.th, R.drawabl e.eight, r.drawable.ele,r.drawable.five, r.drawable.four, r.drawable.nice, r.drawable.seven, R.drawable.six, r.drawable.sl, r.drawable.ss, r.drawable.sw, r.drawable.ten, r.drawable.tw,r.drawable.oneowne}; @Overrideprotected void OnCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); setcontentview (r.layout.activity_ main), final Imageswitcher switcher = (imageswitcher) This.findviewbyid (r.id.switcher); final Gallery Gallery = (Gallery) This.findviewbyid (r.id.gallery); switcher.setfactory (new viewfactory () {@Overridepublic View makeview () {ImaGeview img = new ImageView (mainactivity.this); img.setbackgroundcolor (0xff0000); img.setscaletype ( ImageView.ScaleType.FIT_CENTER); img.setlayoutparams (new imageswitcher.layoutparams (layoutparams.wrap_content, layoutparams.wrap_content)); return img;}}); /set Picture Replacement animation effect Switcher.setinanimation (animationutils.loadanimation (this, android. r.anim.fade_in)); switcher.setoutanimation (animationutils.loadanimation (this, android. R.anim.fade_out));//create DataAdapter object, provide data for gallery Baseadapter adapter = new Baseadapter () {@Overridepublic int GetCount () {//TODO auto-generated Method Stubreturn imageids.length;} @Overridepublic Object getItem (int position) {//TODO auto-generated method Stubreturn position;} @Overridepublic long getitemid (int position) {//TODO auto-generated method Stubreturn position;} @Overridepublic View GetView (int position, view convertview, viewgroup parent) {ImageView img = new ImageView (mainactivity . this); Img.setimageresource (imageids[position% imageids.length]);//set The zoom type of the ImageView Img.setscaLetype (ImageView.ScaleType.FIT_XY); img.setlayoutparams (new gallery.layoutparams);//TypedArray arr= Obtainstyledattributes (R.) Img.setbackgroundresource (resid); return img;}}; Gallery.setadapter (adapter); gallery.setonitemselectedlistener (new onitemselectedlistener () {@Overridepublic void onitemselected (adapterview<?> parent, View view, int position, long id) {//TODO auto-generated method Stubswitcher. Setimageresource (imageids[position% imageids.length]);} @Overridepublic void onnothingselected (adapterview<?> parent) {//TODO auto-generated method stub}}); @Overridepublic boolean oncreateoptionsmenu (menu menu) {//inflate The menu; this adds items to the action Bar if it is pre Sent.getmenuinflater (). Inflate (r.menu.main, menu); return true;}}</pre><p><p>The implementation results are as Follows:</p></p><p><p></p></p><p><p></p></p><p><p>Android Learning Note 15--galley</p></p></span>