Android之GridView和BaseAdapter

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.test17.MainActivity" >

   <GridView 
       android:id="@+id/gv_gridView"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:numColumns="4">
   </GridView>
   <GridView 
       android:id="@+id/gv_gridView2"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:numColumns="4">
   </GridView>
 
</RelativeLayout>

package com.example.test17;


import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {
	private GridView gridView;
	private GridView gridView2;
	private String[] address={"北京","天津","上海","深圳","成都"};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		gridView=(GridView) findViewById(R.id.gv_gridView);
		gridView2=(GridView) findViewById(R.id.gv_gridView2);
		//创建适配器
		ArrayAdapter<String> adapter=new ArrayAdapter<String>(
				this,
				R.layout.grid_item,
				R.id.tv_textView,
				address);
		gridView.setAdapter(adapter);
		gridView2.setAdapter(new MyAdapter());
	}
	
	class MyAdapter extends BaseAdapter{
		//设置数据源
		private int[] images={
				R.drawable.a,R.drawable.b,R.drawable.c,R.drawable.d,R.drawable.e
		};
		private String[] names={
				"name1","name2","name3","name4","name5"
		};
		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return images.length;
		}

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

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

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			View view;
			ViewHolder holder;
			if(convertView==null){
				holder=new ViewHolder();
				view=LayoutInflater.from(MainActivity.this).inflate(R.layout.grid2_item, null);
				holder.image=(ImageView) view.findViewById(R.id.iv_image2);
				holder.tv=(TextView) view.findViewById(R.id.tv_textView2);
				view.setTag(holder);
			}else{
				view=convertView;
				holder=(ViewHolder) view.getTag();
			}
			ImageView image=holder.image;
			image.setImageResource(images[position]);
			TextView tv=holder.tv;
			tv.setText(names[position]);
			return view;
		}
	}
	
	class ViewHolder{
		 ImageView image;
		 TextView tv;
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <ImageView
        android:id="@+id/iv_image2"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@drawable/ic_launcher"/>

    <TextView
        android:id="@+id/tv_textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="name1"
        />

</LinearLayout>