安卓學習記錄，BaseAdapter的使用

PersonBean類：

package com.example.ln.baseadapterdemo;

/**
 * Created by Ln on 2016/3/1.
 */
public class PersonBean {

    private String name;
    private String desc;

    public PersonBean() {
    }

    public PersonBean(String name, String desc) {
        this.name = name;
        this.desc = desc;
    }

    public String getName() {
        return name;
    }

    public String getDesc() {
        return desc;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    @Override
    public String toString() {
        return "PersonBean{" +
                "name='" + name + '\'' +
                ", desc='" + desc + '\'' +
                '}';
    }
}

MyAdapter類：

package com.example.ln.baseadapterdemo;

import android.content.Context;
import android.text.Layout;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.
public class MyAdapter extends BaseAdapter {
    private LayoutInflater inflater;
    private List<PersonBean> list;

    public MyAdapter(List<PersonBean> personlist, Context context) {
        list = personlist;
        inflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        Log.i("test", "" + position);
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

//        //方式一：
//        View view = inflater.inflate(R.layout.item, null);
//        TextView tv_name = (TextView) view.findViewById(R.id.item_tv_name);
//        TextView tv_desc = (TextView) view.findViewById(R.id.item_tv_desc);
//
//        PersonBean personBean = list.get(position);
//        tv_name.setText(personBean.getName());
//        tv_desc.setText(personBean.getDesc());
//        return view;

        //方式二：
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.item, null);

        }

        TextView tv_name = (TextView) convertView.findViewById(R.id.item_tv_name);
        TextView tv_desc = (TextView) convertView.findViewById(R.id.item_tv_desc);

        PersonBean personBean = list.get(position);
        tv_name.setText(personBean.getName());
        tv_desc.setText(personBean.getDesc());

        return convertView;

//        //第三種 方式：
//
//        Viewholder viewholder = null;
//        if (convertView == null) {
//            viewholder = new Viewholder();
//            convertView = inflater.inflate(R.layout.item,null);
//            viewholder.tv_name = (TextView) convertView.findViewById(R.id.item_tv_name);
//            viewholder.tv_desc = (TextView) convertView.findViewById(R.id.item_tv_desc);
//            convertView.setTag(viewholder);
//        }
//        PersonBean personBean = list.get(position);
//        viewholder = (Viewholder) convertView.getTag();
//        viewholder.tv_name.setText(personBean.getName());
//        viewholder.tv_desc.setText(personBean.getDesc());
//        return convertView;
    }

    public class Viewholder{
        private TextView tv_name;
        private TextView tv_desc;
    }
}