Android-grid view (GridView) instance

The Main.xml code is as follows:

<?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" >    <gridview        android:id= "@+id/mygridview" android:layout_width= "Fill_        Parent "        android:layout_height=" wrap_content "        android:numcolumns=" 3 "        android:stretchmode=" ColumnWidth ">    </GridView></LinearLayout>

The Grid_layout.xml code is as follows:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" match_parent "    android:layout_height=" match_parent "    android:o rientation= "vertical" >    <imageview        android:id= "@+id/img"        android:layout_width= "Wrap_content"        android:layout_height= "wrap_content"        android:scaletype= "center"        android:padding= "3px"/></ Linearlayout>

. Java code is as follows:

Package Org.lxh.demo;import Java.lang.reflect.field;import Java.util.arraylist;import java.util.HashMap;import Java.util.list;import Java.util.map;import Android.app.activity;import Android.os.bundle;import Android.widget.gridview;import Android.widget.simpleadapter;public class Hello extends Activity {private List<map <string, integer>> list = new arraylist<map<string, integer>> ();p rivate simpleadapter Simpleadapter = null;private GridView GridView = Null;public void OnCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Life cycle Method Super.setcontentview (R.layout.main); Set the layout manager this.initadapter () to use, This.gridview = (GridView) Super.findviewbyid (R.id.mygridview); This.gridView.setAdapter (This.simpleadapter);} private void Initadapter () {field[] fields = R.drawable.class.getdeclaredfields ();//reflection mechanism for (int x = 0; x < Fields.leng Th X + +) {if (Fields[x].getname () startsWith ("Png_")) {map<string, integer> Map = new hashmap<string, Integer>(), try {map.put ("img", Fields[x].getint (R.drawable.class)),} catch (IllegalArgumentException e) {e.printstacktrace ( );} catch (Illegalaccessexception e) {e.printstacktrace ();} This.list.add (map);} This.simpleadapter = new Simpleadapter (this, this.list,r.layout.grid_layout, new string[] {"img"},new int[] {R.id.img} );}}}

The effect is as follows:

Android-grid view (GridView) instance