Android Studio 实现九宫格功能

<?xml version="1.0" encoding="utf-8"?>

<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">

 <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="http://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();
   }
  }
 );
 }
}