BaseAdapter使listview设置不同背景图片并添加selector

时间：2023-03-10 07:53:55
BaseAdapter使listview设置不同背景图片并添加selector

前段时间为了实现根据item不同的内容实现不同的背景色google了好久只找到了个隔行换色，通过自定义SimpleAdapter终于实现了此功能，但是定义了selector并没有触发点击效果。今天重新想了一遍终于把这个问题解决了。在自定义的getView里就给每个convertView定义它的背景色和selector。

[代码]自定义SimpleAdapter     

01 public class MySimpleAdapter extends BaseAdapter {
02     private LayoutInflater mInflater;
03  
04     private List<HashMap<String, Object>> dataList;
05  
06     public MySimpleAdapter(Context context, List<HashMap<String, Object>> data) {
07         mInflater = LayoutInflater.from(context);
08         this.dataList = data;
09     }
10  
11     @Override
12     public int getCount() {
13         return dataList.size();
14     }
15  
16     @Override
17     public Object getItem(int position) {
18         return position;
19     }
20  
21     @Override
22     public long getItemId(int position) {
23         return position;
24     }
25  
26     @Override
27     public View getView(int position, View convertView, ViewGroup parent) {
28         ViewHolder holder;
29         if (convertView == null) {
30             convertView = mInflater.inflate(R.layout.color_list_item, null);
31             holder = new ViewHolder();
32             holder.blue = (TextView)convertView.findViewById(R.id.blue_item);
33             holder.red = (TextView)convertView.findViewById(R.id.red_item);
34             holder.green = (TextView)convertView.findViewById(R.id.green_item);
35             holder.yellow = (TextView)convertView.findViewById(R.id.yellow_item);
36  
37             convertView.setTag(holder);
38  
39         } else {
40             holder = (ViewHolder)convertView.getTag();
41  
42         }
43         holder.blue.setText((CharSequence)dataList.get(position).get("blue"));
44         holder.red.setText((CharSequence)dataList.get(position).get("red"));
45         holder.green.setText((CharSequence)dataList.get(position).get("green"));
46         holder.yellow.setText((CharSequence)dataList.get(position).get("yellow"));
47         if ("blue".equals(dataList.get(position).get("status").toString())) {
48             convertView.setBackgroundResource(R.drawable.item_chang_blue);
49         } else if ("red".equals(dataList.get(position).get("status").toString())) {
50             convertView.setBackgroundResource(R.drawable.item_chang_red);
51         } else if ("green".equals(dataList.get(position).get("status").toString())) {
52             convertView.setBackgroundResource(R.drawable.flightinfo_item_chang_green);
53         } else if ("yellow".equals(dataList.get(position).get("status").toString())) {
54             convertView.setBackgroundResource(R.drawable.flightinfo_item_chang_yellow);
55         }
56         return convertView;
57     }
58  
59     @Override
60     public void notifyDataSetChanged() {
61         super.notifyDataSetChanged();
62     }
63  
64     class ViewHolder {
65         TextView blue;
66         TextView red;
67         TextView green;
68         TextView yellow;
69     }
70      
71 }

2. [代码]选择器item_chang_blue.xml 其他同理     

01 <?xml version="1.0" encoding="utf-8"?>
02 <selector
03   xmlns:android="http://schemas.android.com/apk/res/android">
04      
05 <!-- 非触摸模式下获得焦点并单击时的背景图片 --> 
06  <item
07     android:state_focused="true"
08     android:state_pressed="true"
09  android:drawable= "@drawable/list_item_pressed"/>  
10 <!-- 触摸模式下单击时的背景图片 -->
11    
12   <item 
13  android:state_focused="false" 
14     android:state_pressed="true"   
15     android:drawable="@drawable/list_item_pressed" /> 
16  
17  
18 <!--选中时的图片背景  --> 
19  <item
20  android:state_selected="true"
21     android:drawable="@drawable/list_item_pressed"/> 
22 <!--获得焦点时的图片背景  --> 
23  <item
24     android:state_focused="true"
25     android:drawable="@drawable/list_item_pressed"/>
26     <!--默认背景  -->  ​
27     <item android:drawable="@drawable/status_blue" />
28 </selector>
29 ​​