玩转Android---UI篇---GridView（网格布局）
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
