Android PopupWindow嵌套ListView（模仿分类下拉菜单效果）

1:布局文件

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1. <span style="font-size:18px;"><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
2. "http://schemas.android.com/tools"  
3. "match_parent"  
4. "match_parent"  
5.  >  
6.   
7.        <TextView   
8. "@+id/tv_text_age"  
9. "wrap_content"  
10. "wrap_content"  
11. "@drawable/choolse_bg"  
12. "不限"  
13. "12dp"  
14. "#9d72d2"  
15. "true"  
16. "center_vertical"  
17.                 />  
18. </RelativeLayout></span>  

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1. package com.jackie.popupwindow;  
2. import java.util.ArrayList;  
3. import java.util.List;  
4.   
5. import android.app.Activity;  
6. import android.graphics.Color;  
7. import android.graphics.drawable.ColorDrawable;  
8. import android.os.Bundle;  
9. import android.view.LayoutInflater;  
10. import android.view.View;  
11. import android.view.View.OnClickListener;  
12. import android.view.ViewGroup;  
13. import android.view.ViewGroup.LayoutParams;  
14. import android.widget.AdapterView;  
15. import android.widget.AdapterView.OnItemClickListener;  
16. import android.widget.BaseAdapter;  
17. import android.widget.ListView;  
18. import android.widget.PopupWindow;  
19. import android.widget.TextView;  
20.   
21. public class MainActivity extends Activity implements OnClickListener {  
22.     private TextView tv_text_age;  
23.     private PopupWindow pop;  
24. listView = null;  
25. <String> datas;  
26.     private SelectAgeAdapter mSelectAdapter;  
27.     private LayoutInflater inflater;  
28.     @Override  
29.     protected void onCreate(Bundle savedInstanceState) {  
30.         super.onCreate(savedInstanceState);  
31.         setContentView(R.layout.activity_main);  
32.         initData();  
33. inflater = LayoutInflater.from(this);  
34. tv_text_age = (TextView) findViewById(R.id.tv_text_age);  
35.         tv_text_age.setOnClickListener(this);  
36.     }  
37.     private void initData() {  
38. datas = new ArrayList<String>();  
39. i = 0; i < 50; i++){  
40.             datas.add("HelloWorld - " + i);  
41.         }  
42.     }  
43.     @Override  
44.     public void onClick(View v) {  
45.         if(v.getId() == R.id.tv_text_age){  
46. pop == null) {  
47. listView = new ListView(this);  
48.                 listView.setDividerHeight(1);  
49.                 listView.setBackgroundResource(R.drawable.kge_feek_bg);  
50.                 listView.setCacheColorHint(0x00000000);  
51. mSelectAdapter = new SelectAgeAdapter();  
52. pop = new PopupWindow(listView, tv_text_age.getWidth(), LayoutParams.WRAP_CONTENT, true);  
53.             }  
54.             listView.setAdapter(mSelectAdapter);  
55.             pop.setBackgroundDrawable(new ColorDrawable(Color.RED));
56.             pop.showAsDropDown(tv_text_age, 0, 0);  
57.               
58.             listView.setOnItemClickListener(new OnItemClickListener() {  
59.                 @Override  
60. <?> parent, View view,  
61.                         int position, long id) {  
62.                     tv_text_age.setText(datas.get(position));  
63.                     dismissPopWindow();  
64.                 }  
65.             });  
66.         }  
67.     }  
68.     public void dismissPopWindow() {  
69.         if(pop != null && pop.isShowing()){  
70.             pop.dismiss();  
71.         }  
72.     }  
73.       
74.     class SelectAgeAdapter extends BaseAdapter {  
75.   
76.         @Override  
77.         public int getCount() {  
78. > 0 ? datas.size() : 0;  
79.         }  
80.   
81.         @Override  
82.         public Object getItem(int position) {  
83.             return datas.get(position);  
84.         }  
85.   
86.         @Override  
87.         public long getItemId(int position) {  
88.             return position;  
89.         }  
90.   
91.         @Override  
92.         public View getView(int position, View convertView, ViewGroup parent) {  
93.             ViewHolder holder;  
94. convertView == null) {  
95. holder = new ViewHolder();  
96. convertView = inflater.inflate(R.layout.item, null);  
97. holder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);  
98.                 convertView.setTag(holder);  
99.                   
100.             } else {  
101. holder = (ViewHolder) convertView.getTag();  
102.             }  
103.             holder.tv_name.setText(datas.get(position));  
104.             return convertView;  
105.         }  
106.     }  
107.     class ViewHolder {  
108.         TextView tv_name;  
109.     }  
110. }