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>