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万能适配器

base-adapter

Android 万能的Adapter for ListView,GridView等，支持多种Item类型的情况。

可以直接导入项目参考，在Android Studio中，使用Import Module进行导入，如下图：

单种类型Item

listView.setAdapter(new CommonAdapter<Bean>(getActivity(), mDatas,
                R.layout.item_single_listview)
{
      @Override
      public void convert(final ViewHolder holder, final Bean bean)
      {
          holder.setText(R.id.id_title, bean.getTitle())
                  .setText(R.id.id_desc, bean.getDesc())
                  .setText(R.id.id_time, bean.getTime())
                  .setText(R.id.id_phone, bean.getPhone());

          holder.setOnClickListener(R.id.id_title, new View.OnClickListener()
          {
              @Override
              public void onClick(View view)
              {
                  Toast.makeText(getActivity(), bean.getTitle(), Toast.LENGTH_SHORT).show();
              }
          });
      }

});

只需要简单的将Adapter继承CommonAdapter，复写convert方法即可。省去了自己编写ViewHolder等大量的重复的代码。

可以通过holder.getView(id)拿到任何控件。
ViewHolder中封装了大量的常用的方法，比如holder.setText(id,text)，holder.setOnClickListener(id,listener)等，可以支持使用。

效果图：

多种类型的Item

package com.zhy.quickdev.adapter.sample.adapter;

import android.content.Context;

import com.zhy.quickdev.adapter.MultiItemCommonAdapter;
import com.zhy.quickdev.adapter.MultiItemTypeSupport;
import com.zhy.quickdev.adapter.R;
import com.zhy.quickdev.adapter.ViewHolder;
import com.zhy.quickdev.adapter.sample.bean.ChatMessage;

import java.util.List;

/**
 * Created by zhy on 15/9/4.
 */
public class ChatAdapter extends MultiItemCommonAdapter<ChatMessage>
{
    public ChatAdapter(Context context, List<ChatMessage> datas)
    {
        super(context, datas, new MultiItemTypeSupport<ChatMessage>()
        {
            @Override
            public int getLayoutId(int position, ChatMessage msg)
            {
                if (msg.isComMeg())
                {
                    return R.layout.main_chat_from_msg;
                }
                return R.layout.main_chat_send_msg;
            }

            @Override
            public int getViewTypeCount()
            {
                return 2;
            }
            @Override
            public int getItemViewType(int postion, ChatMessage msg)
            {
                if (msg.isComMeg())
                {
                    return ChatMessage.RECIEVE_MSG;
                }
                return ChatMessage.SEND_MSG;
            }
        });
    }

    @Override
    public void convert(ViewHolder holder, ChatMessage chatMessage)
    {

        switch (holder.getLayoutId())
        {
            case R.layout.main_chat_from_msg:
                holder.setText(R.id.chat_from_content, chatMessage.getContent());
                holder.setText(R.id.chat_from_name, chatMessage.getName());
                holder.setImageResource(R.id.chat_from_icon, chatMessage.getIcon());
                break;
            case R.layout.main_chat_send_msg:
                holder.setText(R.id.chat_send_content, chatMessage.getContent());
                holder.setText(R.id.chat_send_name, chatMessage.getName());
                holder.setImageResource(R.id.chat_send_icon, chatMessage.getIcon());
                break;
        }
    }
}

需要在构造中传入MultiItemTypeSupport对象，然后在convert方法中，根据holder.getLayoutId()，根据不同的layoutId进行相应的控件初始化即可。

效果图：

 1 package com.example.adapter;
 2 
 3 import java.util.List;
 4 
 5 import android.content.Context;
 6 import android.view.LayoutInflater;
 7 import android.view.View;
 8 import android.view.ViewGroup;
 9 import android.widget.BaseAdapter;
10 
11 public abstract class CommonAdapter<T> extends BaseAdapter {
12     protected Context mContext;
13     protected List<T> mDatas;
14     protected LayoutInflater mInflater;
15     private int layoutId;
16 
17     public CommonAdapter(Context context, List<T> datas, int layoutId) {
18         this.mContext = context;
19         mInflater = LayoutInflater.from(context);
20         this.mDatas = datas;
21         this.layoutId = layoutId;
22     }
23 
24     @Override
25     public int getCount() {
26         return mDatas.size();
27     }
28 
29     @Override
30     public T getItem(int position) {
31         return mDatas.get(position);
32     }
33 
34     @Override
35     public long getItemId(int position) {
36         return position;
37     }
38 
39     @Override
40     public View getView(int position, View convertView, ViewGroup parent) {
41         ViewHolder holder = ViewHolder.get(mContext, convertView, parent,
42                 layoutId, position);
43         convert(holder, getItem(position));
44         return holder.getConvertView();
45     }
46 
47     public abstract void convert(ViewHolder holder, T t);
48 
49 }

CommonAdapter.java

 1 package com.example.adapter;
 2 
 3 import android.content.Context;
 4 import android.view.View;
 5 import android.view.ViewGroup;
 6 
 7 import java.util.List;
 8 
 9 public abstract class MultiItemCommonAdapter<T> extends CommonAdapter<T> {
10 
11     protected MultiItemTypeSupport<T> mMultiItemTypeSupport;
12 
13     public MultiItemCommonAdapter(Context context, List<T> datas,
14             MultiItemTypeSupport<T> multiItemTypeSupport) {
15         super(context, datas, -1);
16         mMultiItemTypeSupport = multiItemTypeSupport;
17     }
18 
19     @Override
20     public int getViewTypeCount() {
21         if (mMultiItemTypeSupport != null)
22             return mMultiItemTypeSupport.getViewTypeCount();
23         return super.getViewTypeCount();
24     }
25 
26     @Override
27     public int getItemViewType(int position) {
28         if (mMultiItemTypeSupport != null)
29             return mMultiItemTypeSupport.getItemViewType(position,
30                     mDatas.get(position));
31         return super.getItemViewType(position);
32 
33     }
34 
35     @Override
36     public View getView(int position, View convertView, ViewGroup parent) {
37         if (mMultiItemTypeSupport == null)
38             return super.getView(position, convertView, parent);
39 
40         int layoutId = mMultiItemTypeSupport.getLayoutId(position,
41                 getItem(position));
42         ViewHolder viewHolder = ViewHolder.get(mContext, convertView, parent,
43                 layoutId, position);
44         convert(viewHolder, getItem(position));
45         return viewHolder.getConvertView();
46     }
47 
48 }

MultiItemCommonAdapter.java

1 package com.example.adapter;
2 
3 public interface MultiItemTypeSupport<T> {
4     int getLayoutId(int position, T t);
5 
6     int getViewTypeCount();
7 
8     int getItemViewType(int postion, T t);
9 }

MultiItemTypeSupport.java

  1 package com.example.adapter;
  2 
  3 import android.annotation.SuppressLint;
  4 import android.content.Context;
  5 import android.graphics.Bitmap;
  6 import android.graphics.Paint;
  7 import android.graphics.Typeface;
  8 import android.graphics.drawable.Drawable;
  9 import android.os.Build;
 10 import android.text.util.Linkify;
 11 import android.util.SparseArray;
 12 import android.view.LayoutInflater;
 13 import android.view.View;
 14 import android.view.ViewGroup;
 15 import android.view.animation.AlphaAnimation;
 16 import android.widget.Checkable;
 17 import android.widget.ImageView;
 18 import android.widget.ProgressBar;
 19 import android.widget.RatingBar;
 20 import android.widget.TextView;
 21 
 22 public class ViewHolder {
 23     private SparseArray<View> mViews;
 24     private int mPosition;
 25     private View mConvertView;
 26     private Context mContext;
 27     private int mLayoutId;
 28 
 29     public ViewHolder(Context context, ViewGroup parent, int layoutId,
 30             int position) {
 31         mContext = context;
 32         mLayoutId = layoutId;
 33         this.mPosition = position;
 34         this.mViews = new SparseArray<View>();
 35         mConvertView = LayoutInflater.from(context).inflate(layoutId, parent,
 36                 false);
 37         mConvertView.setTag(this);
 38     }
 39 
 40     public static ViewHolder get(Context context, View convertView,
 41             ViewGroup parent, int layoutId, int position) {
 42         if (convertView == null) {
 43             return new ViewHolder(context, parent, layoutId, position);
 44         } else {
 45             ViewHolder holder = (ViewHolder) convertView.getTag();
 46             holder.mPosition = position;
 47             return holder;
 48         }
 49     }
 50 
 51     public int getPosition() {
 52         return mPosition;
 53     }
 54 
 55     public int getLayoutId() {
 56         return mLayoutId;
 57     }
 58 
 59     /**
 60      * 通过viewId获取控件
 61      * 
 62      * @param viewId
 63      * @return
 64      */
 65     public <T extends View> T getView(int viewId) {
 66         View view = mViews.get(viewId);
 67         if (view == null) {
 68             view = mConvertView.findViewById(viewId);
 69             mViews.put(viewId, view);
 70         }
 71         return (T) view;
 72     }
 73 
 74     public View getConvertView() {
 75         return mConvertView;
 76     }
 77 
 78     /**
 79      * 设置TextView的值
 80      * 
 81      * @param viewId
 82      * @param text
 83      * @return
 84      */
 85     public ViewHolder setText(int viewId, String text) {
 86         TextView tv = getView(viewId);
 87         tv.setText(text);
 88         return this;
 89     }
 90 
 91     public ViewHolder setImageResource(int viewId, int resId) {
 92         ImageView view = getView(viewId);
 93         view.setImageResource(resId);
 94         return this;
 95     }
 96 
 97     public ViewHolder setImageBitmap(int viewId, Bitmap bitmap) {
 98         ImageView view = getView(viewId);
 99         view.setImageBitmap(bitmap);
100         return this;
101     }
102 
103     public ViewHolder setImageDrawable(int viewId, Drawable drawable) {
104         ImageView view = getView(viewId);
105         view.setImageDrawable(drawable);
106         return this;
107     }
108 
109     public ViewHolder setBackgroundColor(int viewId, int color) {
110         View view = getView(viewId);
111         view.setBackgroundColor(color);
112         return this;
113     }
114 
115     public ViewHolder setBackgroundRes(int viewId, int backgroundRes) {
116         View view = getView(viewId);
117         view.setBackgroundResource(backgroundRes);
118         return this;
119     }
120 
121     public ViewHolder setTextColor(int viewId, int textColor) {
122         TextView view = getView(viewId);
123         view.setTextColor(textColor);
124         return this;
125     }
126 
127     public ViewHolder setTextColorRes(int viewId, int textColorRes) {
128         TextView view = getView(viewId);
129         view.setTextColor(mContext.getResources().getColor(textColorRes));
130         return this;
131     }
132 
133     @SuppressLint("NewApi")
134     public ViewHolder setAlpha(int viewId, float value) {
135         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
136             getView(viewId).setAlpha(value);
137         } else {
138             // Pre-honeycomb hack to set Alpha value
139             AlphaAnimation alpha = new AlphaAnimation(value, value);
140             alpha.setDuration(0);
141             alpha.setFillAfter(true);
142             getView(viewId).startAnimation(alpha);
143         }
144         return this;
145     }
146 
147     public ViewHolder setVisible(int viewId, boolean visible) {
148         View view = getView(viewId);
149         view.setVisibility(visible ? View.VISIBLE : View.GONE);
150         return this;
151     }
152 
153     public ViewHolder linkify(int viewId) {
154         TextView view = getView(viewId);
155         Linkify.addLinks(view, Linkify.ALL);
156         return this;
157     }
158 
159     public ViewHolder setTypeface(Typeface typeface, int... viewIds) {
160         for (int viewId : viewIds) {
161             TextView view = getView(viewId);
162             view.setTypeface(typeface);
163             view.setPaintFlags(view.getPaintFlags() | Paint.SUBPIXEL_TEXT_FLAG);
164         }
165         return this;
166     }
167 
168     public ViewHolder setProgress(int viewId, int progress) {
169         ProgressBar view = getView(viewId);
170         view.setProgress(progress);
171         return this;
172     }
173 
174     public ViewHolder setProgress(int viewId, int progress, int max) {
175         ProgressBar view = getView(viewId);
176         view.setMax(max);
177         view.setProgress(progress);
178         return this;
179     }
180 
181     public ViewHolder setMax(int viewId, int max) {
182         ProgressBar view = getView(viewId);
183         view.setMax(max);
184         return this;
185     }
186 
187     public ViewHolder setRating(int viewId, float rating) {
188         RatingBar view = getView(viewId);
189         view.setRating(rating);
190         return this;
191     }
192 
193     public ViewHolder setRating(int viewId, float rating, int max) {
194         RatingBar view = getView(viewId);
195         view.setMax(max);
196         view.setRating(rating);
197         return this;
198     }
199 
200     public ViewHolder setTag(int viewId, Object tag) {
201         View view = getView(viewId);
202         view.setTag(tag);
203         return this;
204     }
205 
206     public ViewHolder setTag(int viewId, int key, Object tag) {
207         View view = getView(viewId);
208         view.setTag(key, tag);
209         return this;
210     }
211 
212     public ViewHolder setChecked(int viewId, boolean checked) {
213         Checkable view = (Checkable) getView(viewId);
214         view.setChecked(checked);
215         return this;
216     }
217 
218     /**
219      * 关于事件的
220      */
221     public ViewHolder setOnClickListener(int viewId,
222             View.OnClickListener listener) {
223         View view = getView(viewId);
224         view.setOnClickListener(listener);
225         return this;
226     }
227 
228     public ViewHolder setOnTouchListener(int viewId,
229             View.OnTouchListener listener) {
230         View view = getView(viewId);
231         view.setOnTouchListener(listener);
232         return this;
233     }
234 
235     public ViewHolder setOnLongClickListener(int viewId,
236             View.OnLongClickListener listener) {
237         View view = getView(viewId);
238         view.setOnLongClickListener(listener);
239         return this;
240     }
241 
242 }

ViewHolder.java

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原文地址：https://www.cnblogs.com/xqxacm/p/4843717.html