Android应用开发学习之表格视图

作者：刘昊昱 

博客：http://blog.csdn.net/liuhaoyutz

本文我们来学习一个使用表格视图的程序，下图是该程序的运行效果：

该程序主Activity文件内容如下：

package com.liuhaoyu;

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 MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        GridView gridview = (GridView) findViewById(R.id.gridView); 
        
		int[] imageId = new int[] { R.drawable.image01, R.drawable.image02,
				R.drawable.image03, R.drawable.image04, R.drawable.image05,
				R.drawable.image06, R.drawable.image07, R.drawable.image08, 
				R.drawable.image09, R.drawable.image10 }; 
		String[] title = new String[] { "时钟", "E-mail", "音乐", "电话", "日历",
				"游戏", "YouTube", "地图", "Google+", "通讯录" }; 
		List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); 
		
		for (int i = 0; i < imageId.length; i++) {
			Map<String, Object> map = new HashMap<String, Object>(); // 实例化Map对象
			map.put("image", imageId[i]);
			map.put("title", title[i]);
			listItems.add(map); 
		}

		SimpleAdapter adapter = new SimpleAdapter(this, 
												listItems,
												R.layout.items, 
												new String[] { "title", "image" }, 
												new int[] {R.id.title, R.id.image }); 
		gridview.setAdapter(adapter); 
		
		gridview.setNumColumns(4);
    }
}

该程序使用了SimpleAdapter类，关于这个类的使用，请参考我的上一篇博客《Android应用开发学习之列表视图》。

主布局文件main.xml内容如下：

<?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:orientation="vertical" >

    <GridView 
    	android:id="@+id/gridView" 
    	android:layout_height="wrap_content" 
    	android:layout_width="match_parent"/>

</LinearLayout>

根据SimpleAdapter类的需要，针对每一个单元格，定义布局文件items.xml，其内容如下：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
  <ImageView
      android:id="@+id/image"
      android:layout_gravity="center"
      android:layout_height="wrap_content"
      android:layout_width="wrap_content"/>  
  <TextView  
      android:id="@+id/title" 
      android:layout_below="@id/image"
      android:layout_centerHorizontal="true"
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content"/>	 
</RelativeLayout>