Android之自定义适配器

activity_main.xml

items.xml

MainActivity.java

package com.example.android_listview_adapter;

import java.util.ArrayList;
import java.util.List;

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.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

	private ListView listView;
	private MyAdapter myAdapter;//自定义适配器
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		listView=(ListView) this.findViewById(R.id.listView1);
		myAdapter=new MyAdapter(getData());//把数据加进去
		listView.setAdapter(myAdapter);
	}
	
	public List getData(){
		List list=new ArrayList();
		for(int i=0;i<100;i++){
			list.add("ccnu"+i);
		}
		return list;
	}
	
	/**
	 * 
	 * @author liuya
	 *
	 *一个基本的适配器有四个属性getCount，getItem，getItemId，getView
	 */
	//由于json数据太复杂，所以要自定义适配器，声明适配器的类
	public class MyAdapter extends BaseAdapter{

		private List list;
		
		//构造方法，通过构造方法传递参数
		public MyAdapter(List list) {
			// TODO Auto-generated constructor stub
			this.list=list;
		}
		
		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return list.size();//得到适配器中填充的集合的个数，即是适配器的个数
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return list.get(position);//得到数据集的选项
		}

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

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			View view=LayoutInflater.from(MainActivity.this).inflate(R.layout.items, null);//手工加载一个布局
			TextView textView=(TextView) view.findViewById(R.id.textView1);//把items.xml中的TextView加载到页面
			textView.setText(list.get(position));
			System.out.println("---->>"+position);
			return view;
		}
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
}

效果图如下