Learn android<gallery drag components from scratch. 27 .>

The gallery component enables the gallery display of pictures. Loop a picture in the gallery

The inheritance structure is as follows

Java.lang.Object
?	Android.view.View
	   ?	android.view.viewgroup
		&NBSP;&NBSP;&NBSP;?	android.widget.adapterview<t extends  Android.widget.adapter>
			?	Android.widget.AbsSpinner
				?	Android.widget.Gallery

using the gallery component also uses the adapter to configure the data

Here we use Baseadapter to configure the data

XML file

<span style= "FONT-SIZE:18PX;" ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/android"    xmlns:tools= "http// Schemas.android.com/tools "    android:layout_width=" match_parent "    android:layout_height=" Match_parent "    android:paddingbottom= "@dimen/activity_vertical_margin"    android:paddingleft= "@dimen/activity_ Horizontal_margin "    android:paddingright=" @dimen/activity_horizontal_margin "    android:paddingtop=" @dimen /activity_vertical_margin "    tools:context=". Mainactivity ">    <gallery        android:layout_margintop=" 20DP "        android:id=" @+id/gallery        " Android:layout_width= "Fill_parent"        android:layout_height= "wrap_content"         /></relativelayout> </span>

Java files

<span style= "FONT-SIZE:18PX;" >package Com.example.gallery;import android.os.bundle;import Android. R.integer;import Android.app.activity;import Android.view.menu;import Android.view.view;import Android.view.viewgroup;import Android.widget.baseadapter;import Android.widget.gallery;import Android.widget.gallery.layoutparams;import Android.widget.imageview;public class Mainactivity extends Activity { Private Gallery gallery;//declaration galleryprivate int images[] = {r.drawable.a1, r.drawable.a2, r.drawable.a3,r.drawable.a4, R . Drawable.a5, R.drawable.a6, R.drawable.a7,r.drawable.a8, r.drawable.a9, r.drawable.a10, R.DRAWABLE.A11, R.drawable.a12, R.drawable.a13, r.drawable.a14};//picture data @overrideprotected void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); gallery= (gallery) This.findViewById ( R.id.gallery);//Get Gallerygallery.setadapter (New Myadapter ());} New class inherits Baseadapterclass Myadapter extends baseadapter{@Overridepublic int GetCount ({//TODO auto-generated method stub//Data amount is the maximum value of the shaping data return integer.max_value;} @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 MyView, ViewGroup parent) {//TODO auto-generated method stub//New I that View object ImageView image=new ImageView (Getapplicationcontext ());//Set Picture data Image.setimageresource (images[position% Images.length]);//Set the alignment of the picture Image.setscaletype (ImageView.ScaleType.FIT_XY);//Set the size of the picture image.setlayoutparams (new Gallery.layoutparams (Layoutparams.wrap_content, layoutparams.wrap_content));//returns ImageView return image;}} </span>

Effects such as

Gallery is to load the data through adapter and then display the gallery in the UI

Next section forecast: GridView grid view

Learn android<gallery drag components from scratch. 27 .>