Android之GridView

GridView也是一种ViewGroup，它以二维，可滚动的表格来显示内容。通过使用一个ListAdapter，将要显示的内容将自动被插入到此布局中。本文将给出一个简单示例：

创建一个图片列表（表格），点击之后，提示出位置。

1. 布局文件 ：main.xml

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/learn_view_gridview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:columnWidth="90dp"
    android:numColumns="auto_fit"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:stretchMode="columnWidth"
    android:gravity="center"/>

2. 源代码文件：LearnGridView.java

import com.learn.R;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

public class LearnGridView extends Activity{
	@Override
	public void onCreate(Bundle onSaveInstanceState){
		super.onCreate(onSaveInstanceState);
		setContentView(R.layout.learnviewgridview);
		
		GridView gv = (GridView)findViewById(R.id.learn_view_gridview);
		gv.setAdapter(new ImageAdapter(this));
		
		gv.setOnItemClickListener(new OnItemClickListener(){
			public void onItemClick(AdapterView<?> parent, View v, int position, long id){
				Toast.makeText(LearnGridView.this, " " + position, Toast.LENGTH_LONG).show();
			}
		});		
	}
	
	public class ImageAdapter extends BaseAdapter{
		private Context mContext;
		
		public ImageAdapter(Context c){
			mContext = c;
		}
		
		public int getCount(){
			return mThumbIds.length;
		}
		
		public Object getItem(int position){
			return null;
		}
		
		public long getItemId(int position){
			return 0;
		}
		
		// create a new ImageView for each item referenced by the Adapter
		public View getView(int position, View convertView, ViewGroup parent){
			ImageView imageView;
			if(convertView == null){// if it's not recycled, initialize some attributes
				imageView = new ImageView(mContext);
	            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
	            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
	            imageView.setPadding(8, 8, 8, 8);
	        } else {
	            imageView = (ImageView) convertView;
	        }

	        imageView.setImageResource(mThumbIds[position]);
	        return imageView;
	    }

	    // references to our images
	    private Integer[] mThumbIds = {
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5,
            R.drawable.sample_0, R.drawable.sample_1,
            R.drawable.sample_2, R.drawable.sample_3,
            R.drawable.sample_4, R.drawable.sample_5
	    };
	}
}

3. 运行效果：

仿主菜单式的参考：

http://www.iteye.com/problems/64810