实现自定义的BaseAdapter

package com.yunfox.hellogridview;

import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
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.ListAdapter;
import android.widget.TextView;
import android.widget.Toast;

public class HelloGridView extends Activity {
	private GridView gridview;
	private ImageAdapter imageAdapter;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.mail);
		
		gridview = (GridView) findViewById(R.id.gridview);
		
		imageAdapter = new ImageAdapter(this);
	    gridview.setAdapter(imageAdapter);

	    gridview.setOnItemClickListener(new OnItemClickListener() {
	        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
	            Toast.makeText(HelloGridView.this, "" + position, Toast.LENGTH_SHORT).show();
	            
	            GridView parentGridView = (GridView) parent;
	            ImageAdapter imageadapter = (ImageAdapter) parentGridView.getAdapter();
	            
	    	    imageadapter.setViewImage(v);
	        }
	    });
	}	

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.hello_grid_view, menu);
		return true;
	}
	
	public class ImageAdapter extends BaseAdapter {
		
		private Context mContext;
		private LayoutInflater mInflater;

	    public ImageAdapter(Context c) {
	        mContext = c;
	        this.mInflater = LayoutInflater.from(c);
	    }


		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return mThumbIds.length;
		}

		@Override
		public Object getItem(int arg0) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public long getItemId(int arg0) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			View cellView;
			if(convertView == null)
			{
				cellView = mInflater.inflate(R.layout.grid_view, null);
				TextView textView = (TextView) cellView.findViewById(R.id.dateTextView);
				textView.setText(String.valueOf(position));
			}
	        else
	        {
	            cellView = convertView;
	        }

	        
	        return cellView;
		}
		
		public void setViewImage(View view)
		{
			TextView textView = (TextView) view.findViewById(R.id.dateTextView);
			textView.setText("hahaha");
		}

		// references to our images
	    private Integer[] mThumbIds = {
	            R.drawable.sample_2, R.drawable.sample_3,
	            R.drawable.sample_4, R.drawable.sample_5,
	            R.drawable.sample_6, R.drawable.sample_7,
	            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_6, R.drawable.sample_7,
	            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_6, R.drawable.sample_7
	    };
	}
}