private class MyAdapter extends BaseAdapter {@Overridepublic int getCount() {// TODO Auto-generated method stubreturn 0;}@Overridepublic Object getItem(int arg0) {// TODO Auto-generated method stubreturn null;}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubreturn null;}
}

<?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"><TextViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="Welcome to Mr Wei's Blog" /><Spinnerandroid:id="@+id/spinner"android:layout_width="fill_parent"android:layout_height="wrap_content"/><ListViewandroid:id="@+id/listview"android:layout_width="fill_parent"android:layout_height="wrap_content"/><GridViewandroid:id="@+id/gridview"android:layout_width="fill_parent"android:layout_height="wrap_content"/>
</LinearLayout>

package com.tutor.baseadapter;import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;public class BaseAdapterDemo extends Activity {private Spinner mSpinner;private ListView mListView;private GridView mGridView;private MyAdapter mMyAdapter;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);setupViews();}public void setupViews() {mMyAdapter = new MyAdapter();mSpinner = (Spinner) findViewById(R.id.spinner);mSpinner.setAdapter(mMyAdapter);mListView = (ListView) findViewById(R.id.listview);mListView.setAdapter(mMyAdapter);mGridView = (GridView) findViewById(R.id.gridview);mGridView.setAdapter(mMyAdapter);mGridView.setNumColumns(2);}// 定义自己的适配器,注意getCount和getView方法private class MyAdapter extends BaseAdapter {@Overridepublic int getCount() {// 这里我就返回10了，也就是一共有10项数据项return 10;}@Overridepublic Object getItem(int arg0) {return arg0;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// position就是位置从0开始，convertView是Spinner,ListView中每一项要显示的view// 通常return 的view也就是convertView// parent就是父窗体了，也就是Spinner,ListView,GridView了.TextView mTextView = new TextView(getApplicationContext());mTextView.setText("BaseAdapterDemo");mTextView.setTextColor(Color.RED);return mTextView;}}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal"android:layout_width="fill_parent"android:layout_height="fill_parent"><ImageViewandroid:id="@+id/imageView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/icon"/><TextViewandroid:id="@+id/textview"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="BaseAdapter"/>
</LinearLayout>

@Override
public View getView(int position, View convertView, ViewGroup parent) {// position就是位置从0开始，convertView是Spinner,ListView中每一项要显示的view// 通常return 的view也就是convertView// parent就是父窗体了，也就是Spinner,ListView,GridView了.// TextView mTextView = new TextView(getApplicationContext());// mTextView.setText("BaseAdapterDemo");// mTextView.setTextColor(Color.RED);// return mTextView;//LayoutInflater不会的参照我的 Android 高手进阶教程(五)convertView = LayoutInflater.from(getApplicationContext()).inflate(R.layout.baseadapter_provider,null);TextView mTextView = (TextView)convertView.findViewById(R.id.textview);mTextView.setText("BaseAdapterDemo" + position);mTextView.setTextColor(Color.RED);return convertView;
}