玩转Android-UI篇-GridView（网格格局）

GridView按照行列的方式来显示内容，一般适合显示图标、图片等内容，主要用于设置Adapter

在这里主要是基础BaseAdapter类，重写其中的方法，主要是重写getView方法设置图片的显示格式

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实例代码如下

GridViewTest.java

/* * @author hualang */package org.hualang.grid;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.GridView;import android.widget.ImageView;public class GridViewTest extends Activity {    /** Called when the activity is first created. */	private GridView gv;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                //通过findViewById方法获得GridView对象        gv=(GridView)findViewById(R.id.GridView01);        //设置GridView的行数        gv.setNumColumns(4);        gv.setAdapter(new MyAdapter(this));    }    //自定义适配器    class MyAdapter extends BaseAdapter    {    	//图片id数组    	private Integer[] imgs={    			R.drawable.img01,    			R.drawable.img02,    			R.drawable.img03,    			R.drawable.img04,    			R.drawable.img05,    			R.drawable.img06,    			R.drawable.img07,    			R.drawable.img08,    			    			R.drawable.img01,    			R.drawable.img02,    			R.drawable.img03,    			R.drawable.img04,    			R.drawable.img05,    			R.drawable.img06,    			R.drawable.img07,    			R.drawable.img08    	};    	//上下文对象    	Context context;    	//构造方法    	MyAdapter(Context context)    	{    		this.context=context;    	}    	//获得数量    	public int getCount()    	{    		return imgs.length;    	}    	//获得当前选项    	public Object getItem(int item)    	{    		return item;    	}    	//获得当前选项id    	public long getItemId(int id)    	{    		return id;    	}    	    	//创建View方法    	public View getView(int position,View convertView,ViewGroup parent)    	{    		ImageView imageView;    		if(convertView==null)    		{    			//实例化ImageView对象    			imageView=new ImageView(context);    			//设置ImageView对象布局    			imageView.setLayoutParams(new GridView.LayoutParams(45,45));    			//设置边界对齐    			imageView.setAdjustViewBounds(false);    			//设置刻度类型    			imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);    			//设置间距    			imageView.setPadding(8,8,8,8);    		}else    		{    			imageView=(ImageView)convertView;    		}    		//为ImageView设置图片资源    		imageView.setImageResource(imgs[position]);    		return imageView;    	}		    }}

?main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><GridView 	android:id="@+id/GridView01" 	android:layout_width="wrap_content" 	android:layout_height="wrap_content"></GridView></LinearLayout>

?运行结果如下