万能适配器(2) 抽取CommonAdapter

万能适配器(2) 抽取CommonAdapter

   BaseAdapter中的数据和方法基本一致

getCount(), getItemId(), getItem() 

   主要是getView实现不同，

将提取出共性方法

<span style="font-size:18px;">package com.example.utils;


import java.util.List;


import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import com.example.magicAdapter.R;
/*
 *  提供一个  CommonAdatper  
 * 
 */
public abstract class CommonAdapter<T> extends BaseAdapter {
<span style="white-space:pre">	</span>protected Context context;
<span style="white-space:pre">	</span>protected LayoutInflater minInflater;
<span style="white-space:pre">	</span>protected List<T> mDatas;
protected int layoutId;
<span style="white-space:pre">	</span>public CommonAdapter(Context context, 
<span style="white-space:pre">			</span>List<T> mDatas,int layoutId) {
<span style="white-space:pre">		</span>super();
<span style="white-space:pre">		</span>this.context = context;
<span style="white-space:pre">		</span>this.layoutId =layoutId;
<span style="white-space:pre">		</span>minInflater = LayoutInflater.from(context);
<span style="white-space:pre">		</span>this.mDatas = mDatas;
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public int getCount() {
<span style="white-space:pre">		</span>// TODO Auto-generated method stub
<span style="white-space:pre">		</span>return mDatas.size();
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public T getItem(int position) {
<span style="white-space:pre">		</span>// TODO Auto-generated method stub
<span style="white-space:pre">		</span>return  mDatas.get(position);
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public long getItemId(int position) {
<span style="white-space:pre">		</span>// TODO Auto-generated method stub
<span style="white-space:pre">		</span>return position;
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>
<span style="white-space:pre">	</span>/**
<span style="white-space:pre">	</span> * 供子类实现的
<span style="white-space:pre">	</span> */
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public  View getView(int position, View convertView, ViewGroup parent){
<span style="white-space:pre">		</span>//首先获取MagicViewHolder 
<span style="white-space:pre">		</span>MagicViewHolder magicViewHolder 
<span style="white-space:pre">				</span>= MagicViewHolder.get(context, convertView, parent, 
<span style="white-space:pre">						</span>layoutId, position);<span style="white-space:pre">		</span> 
<span style="white-space:pre">		</span> //通过magicViewHolder和item中的viewid 获取指定的view,并设置值
<span style="white-space:pre">		</span>convert(magicViewHolder, getItem(position));
<span style="white-space:pre">		</span>
<span style="white-space:pre">		</span>//通过ViewHolder获取convertView
<span style="white-space:pre">		</span>return magicViewHolder.getConvertView();
<span style="white-space:pre">	</span>}


<span style="white-space:pre">	</span>/**
<span style="white-space:pre">	</span> * //通过magicViewHolder和item中的viewid 获取指定的view,并设置值
<span style="white-space:pre">	</span> */
<span style="white-space:pre">	</span>public abstract void convert(MagicViewHolder magicViewHolder, T t);
}





</span>

再来看一下简化后的MagicAdapter

（1）继承自定义CommonAdapter

 (2)  主要实现为控件赋值的方法convert();\

package com.example.utils;


import java.util.List;


import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;


import com.example.baseAdapter.Bean;
import com.example.magicAdapter.R;


public class MyMagicAdapter extends <span style="color:#ff0000;">CommonAdapter<Bean></span> {
<span style="white-space:pre">	</span>public MyMagicAdapter(Context context,   List<Bean> mDatas, int layoutId) {
<span style="white-space:pre">		</span>super(context, mDatas, layoutId);
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public void convert(MagicViewHolder magicViewHolder, Bean bean) {
<span style="white-space:pre">		</span>//通过magicViewHolder和item中的viewid 获取指定的view,并设置值
<span style="white-space:pre">		</span>((TextView)(magicViewHolder.getView(R.id.item_title))).setText(bean.getTitle());
<span style="white-space:pre">		</span>((TextView)(magicViewHolder.getView(R.id.item_desc))).setText(bean.getDesc());
<span style="white-space:pre">		</span>((TextView)(magicViewHolder.getView(R.id.item_time))).setText(bean.getTime());
<span style="white-space:pre">		</span>((TextView)(magicViewHolder.getView(R.id.item_phone))).setText(bean.getPhone());
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span> 
}

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