自定义任意MyAdapter extends BaseAdapter（纯Java）

自定义任意MyAdapter extends BaseAdapter（纯Java）

适用于与Spinner、AutoCompleteTextView、Gallery、GridView、ListView等 

主要完成下面两个函数

public int getCount() {}

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

1. import java.util.*;  
2.   
3. import Android.content.Context;  
4. import android.view.*;  
5. import android.widget.*;  
6. import android.widget.ImageView.ScaleType;  
7.   
8. public class MyAdapter extends BaseAdapter{  
9.       
10.     Context context=null;  
11.     List<Map<String,Object>> list=null;  
12.       
13.     MyAdapter(Context context){  
14.         this.context=context;  
15.         //数据初始化   
16.         list=new ArrayList<Map<String,Object>>();  
17.         Map<String,Object> item;  
18.         item=new HashMap<String,Object>();  
19.         item.put("头像",R.drawable.icon);  
20.         item.put("姓名","三爷同学");  
21.         item.put("性别","男");  
22.         item.put("年龄", "15岁");  
23.         list.add(item);  
24.         item=new HashMap<String,Object>();  
25.         item.put("头像",R.drawable.icon);  
26.         item.put("姓名","木木同学");  
27.         item.put("性别","男");  
28.         item.put("年龄", "15岁");  
29.         list.add(item);  
30.         item=new HashMap<String,Object>();  
31.         item.put("头像",R.drawable.icon);  
32.         item.put("姓名","小四同学");  
33.         item.put("性别","女");  
34.         item.put("年龄", "14岁");  
35.         list.add(item);  
36.     }  
37.     public int getCount() {return list.size();}  
38.     public Object getItem(int position) {return position;}  
39.     public long getItemId(int position) {return position;}  
40.   
41.     public View getView(int position, View convertView, ViewGroup parent) {  
42.         //头像   
43.         ImageView iv=new ImageView(context);  
44.         RelativeLayout.LayoutParams lp_iv=new RelativeLayout.LayoutParams(-2,-2);  
45.         lp_iv.addRule(RelativeLayout.ALIGN_PARENT_LEFT);  
46.         iv.setLayoutParams(lp_iv);  
47.         iv.setScaleType(ScaleType.CENTER_INSIDE);  
48.         iv.setImageResource((Integer)((list.get(position)).get("头像")));  
49.         //姓名   
50.         TextView name=new TextView(context);  
51.         RelativeLayout.LayoutParams lp_tv=new RelativeLayout.LayoutParams(-2,-2);  
52.         lp_tv.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);  
53.         name.setLayoutParams(lp_tv);  
54.         name.setTextSize(name.getTextSize()+10);  
55.         name.setText((String)(list.get(position).get("姓名")));  
56.         //性别   
57.         TextView sex=new TextView(context);  
58.         RelativeLayout.LayoutParams lp_sex=new RelativeLayout.LayoutParams(-2,-2);  
59.         lp_sex.addRule(RelativeLayout.ALIGN_PARENT_LEFT);  
60.         sex.setLayoutParams(lp_sex);  
61.         sex.setText((String)(list.get(position).get("性别")));  
62.         //年龄   
63.         TextView  age=new TextView(context);  
64.         RelativeLayout.LayoutParams lp_age=new RelativeLayout.LayoutParams(-2,-2);  
65.         lp_age.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);  
66.         age.setLayoutParams(lp_age);  
67.         age.setText((String)(list.get(position).get("年龄")));  
68.         //相对布局1   
69.         RelativeLayout rl1=new RelativeLayout(context);  
70.         rl1.setLayoutParams(new RelativeLayout.LayoutParams(-1,-2));  
71.         rl1.addView(iv);  
72.         rl1.addView(name);  
73.         //相对布局2   
74.         RelativeLayout rl2=new RelativeLayout(context);  
75.         rl2.setLayoutParams(new LinearLayout.LayoutParams(-1,-2));  
76.         rl2.addView(sex);  
77.         rl2.addView(age);  
78.         //返回视图   
79.         LinearLayout returnView=new LinearLayout(context);  
80.         returnView.setLayoutParams(new ListView.LayoutParams(-1,-2));//注意:ListView.LayoutParams   
81.         returnView.setOrientation(LinearLayout.VERTICAL);  
82.         returnView.addView(rl1);  
83.         returnView.addView(rl2);  
84.   
85.         return returnView;  
86.     }  
87.   
88. }