BaseAdapter封装 实现万能适配器

1.封装ViewHodler

 1 package com.example.utils;
 2
 3 import android.content.Context;
 4 import android.graphics.Bitmap;
 5 import android.util.SparseArray;
 6 import android.view.LayoutInflater;
 7 import android.view.View;
 8 import android.view.ViewGroup;
 9 import android.widget.ImageView;
10 import android.widget.TextView;
11
12 public class ViewHolder {
13
14     private SparseArray<View> mViews;
15     private int mPostion;
16     private View mConverView;
17     private View view;
18
19     public ViewHolder(Context context, View converview, ViewGroup parent,
20             int layoutid, int postion) {
21
22         this.mPostion = postion;
23         mConverView = LayoutInflater.from(context).inflate(layoutid, parent,false);
24         mViews = new SparseArray<View>();
25         mConverView.setTag(this);
26     }
27
28     public static ViewHolder get(Context context, View converView,
29             ViewGroup parent, int layoutid, int postion) {
30
31         if (converView == null) {
32             return new ViewHolder(context, converView, parent, layoutid,postion);
33         } else {
34             ViewHolder holder = (ViewHolder) converView.getTag();
35             holder.mPostion = postion;
36             return holder;
37         }
38
39     }
40
41     public View getConverView() {
42         return mConverView;
43     }
44
45     /**
46      * @author 通过id获取控件
47      *
48      * */
49
50     public <T extends View> T getView(int viewId) {
51
52         View view = mViews.get(viewId);
53         if (view == null) {
54             view = mConverView.findViewById(viewId);
55             mViews.put(viewId, view);
56         }
57         return (T) view;
58
59     }
60     public   ViewHolder  getTextView(int  id,String  tv){
61
62         TextView  mTextView = getView(id);
63         mTextView.setText(tv);
64         return  this;
65     }
66
67     public  ViewHolder  getImageResoure(int  id,int  color){
68
69         ImageView   img=getView(id);
70         img.setImageResource(color);
71         return this;
72     }
73
74     public  ViewHolder  getImageBitmap(int  id,Bitmap  map){
75
76         ImageView   view=getView(id);
77         view.setImageBitmap(map);
78         return this;
79     }
80 }

2.    封装BaseAdapter

 1 package com.example.utils;
 2
 3 import java.util.List;
 4 import android.content.Context;
 5 import android.view.LayoutInflater;
 6 import android.view.View;
 7 import android.view.ViewGroup;
 8 import android.widget.BaseAdapter;
 9
10 public abstract class CommonAdapter<T> extends BaseAdapter {
11
12     protected  Context  mContext;
13     protected  List<T> mDatas;
14     protected  LayoutInflater  mInflater;
15     protected  int  mlayoutId;
16     public CommonAdapter(Context  context,List<T> data,int  layoutId) {
17
18         this.mContext=context;
19         this.mDatas=data;
20         mInflater=LayoutInflater.from(mContext);
21         this.mlayoutId=layoutId;
22     }
23
24     @Override
25     public int getCount() {
26         return mDatas.size();
27     }
28
29     @Override
30     public T getItem(int postion) {
31         return mDatas.get(postion);
32     }
33
34     @Override
35     public long getItemId(int postion) {
36         return postion;
37     }
38
39     @Override
40     public View getView(int postion, View converview, ViewGroup group){
41         ViewHolder  holder=ViewHolder.get(mContext, converview, group, mlayoutId, postion);
42         convert(holder, getItem(postion));
43         return  holder.getConverView();
44       };
45
46      public  abstract   void  convert(ViewHolder  holder,T t);
47 }

3.自己的MyAdapter

 1 package com.example.utils;
 2
 3 import java.util.List;
 4
 5 import android.content.Context;
 6 import com.example.adapter.R;
 7 import com.example.bean.Bean;
 8
 9 public class MyAdapter extends CommonAdapter<Bean>{
10
11     public MyAdapter(Context context, List<Bean> data, int layoutId) {
12         super(context, data, layoutId);
13     }
14
15     @Override
16     public void convert(ViewHolder holder, Bean bean) {
17
18         holder.getTextView(R.id.tv_title, bean.getTitle());
19         holder.getTextView(R.id.tv_time, bean.getTime());
20         holder.getTextView(R.id.tv_from, bean.getForm());
21     }
22 }