android开发分享Android Studio 实现九宫格功能

  <?xml version="1.0" encoding="utf-8"?>    <relativelayout xmlns:android="https://schemas.android.com/apk/res/android"   xmlns:tools="https://schemas.android.com/tools"   android:layout_width="match_parent"   android:layout_height="match_parent">     <gridview   android:id="@+id/gridview"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:verticalspacing="10dp"   android:columnwidth="90dp"   android:numcolumns="3"   android:stretchmode="columnwidth"   android:gravity="center"   android:background="#f3dcf3">   </gridview>   <!--   容器大小和父容器一样大：match_parent   每列之间的间距为27dp：android:verticalspacing="27dp"   指定列宽为90dp：android:columnwidth="90dp"   每一行自动填充3个：android:numcolumns="3"   空余的位置均分给列填充：android:stretchmode="columnwidth"   显示位置居中：android:gravity="center"   -->  </relativelayout>

  <?xml version="1.0" encoding="utf-8"?>  <relativelayout xmlns:android="https://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="wrap_content"   android:background="#f3dcf3">       <imageview   android:id="@+id/itemimage"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_centerhorizontal="true">   </imageview>     <textview   android:id="@+id/itemtext"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_below="@+id/itemimage"   android:layout_centerhorizontal="true" >   </textview>   <!--   该控件设置在相对于父控件水平居中的位置:layout_centerhorizontal="true"   该控件位于@+id的下面：layout_below="@+id/itemimage"   -->      </relativelayout>

  package edu.hrbust.syoneninelayout;    import android.annotation.suppresslint;  import android.app.activity;  import android.os.bundle;  import android.view.view;  import android.widget.adapterview;  import android.widget.adapterview.onitemclicklistener;  import android.widget.gridview;  import android.widget.simpleadapter;  import android.widget.toast;    import java.util.arraylist;  import java.util.hashmap;    public class mainactivity extends activity {   // 调用活动   @override   protected void oncreate(bundle savedinstancestate) {   super.oncreate(savedinstancestate);   // 关联activity_main.xml 和 控件gridview   setcontentview(r.layout.activity_main);   gridview gridview = (gridview) findviewbyid(r.id.gridview);   // 构建arraylist是hashmap格式，hashmap格式是<string,object>   arraylist<hashmap<string,object>> meumlist = new arraylist<hashmap<string, object>>();   // 向arraylist填入数据 图片+i i设置为1~9,形成九宫格   for(int i = 1; i < 10; i++){    hashmap<string,object> map = new hashmap<string, object>();    //r.mipmap.ic_luminggai是关联的图片 我的图片在res的mipmap下面    map.put("itemimage",r.mipmap.ic_luminggai);    map.put("itemtext",""+i);    meumlist.add(map);   }   // 构建数据适配器   simpleadapter saitem = new simpleadapter(this,    meumlist,    r.layout.item,    new string[]{"itemimage","itemtext"},    new int[]{r.id.itemimage,r.id.itemtext});   // 应用适配器   gridview.setadapter(saitem);   gridview.setonitemclicklistener(    new onitemclicklistener() {     @suppresslint("wrongconstant")     public void onitemclick(adapterview<?> arg0, view arg1, int arg2, long arg3) {     int index = arg2 + 1;     toast.maketext(getapplicationcontext(),"点击了选项：" + index,0).show();     }    }   );   }  }