Android动态自动匹配输入框

Posted 2021-02-01 yhw-miracle

动态自动匹配输入框,可以分为单匹配和多匹配两种，如百度搜索框和邮箱发件人的输入框。

1.1 单匹配(AutoCompleteTextView)

1. 初始化 AutoCompleteTextView 控件
2. 需要一个适配器
3. 初始化数据源
4. 将 adapter 与 acTextView 绑定

1 AutoCompleteTextView acTextView = (AutoCompleteTextView)findViewById(R.id.AutoCompleteTextView1);
2 String[] data1 = {"android","Book","system","haha","hehe","shabi"};
3 ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,data1);
4 acTextView.setAdapter(adapter1);

1.2 多匹配(MultiAutoCompleteTextView)

1. 初始化 MultiAutoCompleteTextView 控件
2. 需要一个适配器
3. 初始化数据源
4. 将 adapter 与 acTextView 绑定
5. 设置分隔符

1 MultiAutoCompleteTextView macTextView = (MultiAutoCompleteTextView)findViewById(R.id.MultiAutoCompleteTextView1);
2 String[] data2 = {"123","12345","haharr","httt,"rr"};
3 ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,data2);
4 macTextView.setAdapter(adapter2);
5 macTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());

该方法只支持逗号连接，若需要自定义分隔符，需要自定义类，然后用语句

1 macTextView.setTokenizer(new SemicolonTokenizer(‘;‘));

执行。自定义分隔符类的代码如下。

 1 import android.text.SpannableString;
 2 import android.text.Spanned;
 3 import android.text.TextUtils;
 4 import android.widget.MultiAutoCompleteTextView;
 5 
 6 /**
 7  * Created by yhw-miracle on 2017/9/13.
 8  * @effect 自定义 MultiAutoCompleteTextView 添加分隔符
 9  */
10 
11 public class SemicolonTokenizer implements MultiAutoCompleteTextView.Tokenizer {
12 
13     private char charS;
14     private String mSTring;
15 
16     public SemicolonTokenizer(char charS) {
17         this.charS = charS;
18         mSTring = String.valueOf(charS);
19     }
20 
21     @Override
22     public int findTokenStart(CharSequence text, int cursor) {
23         int i = cursor;
24 
25         while (i > 0 && text.charAt(i - 1) != charS) {
26             i--;
27         }
28         while (i < cursor && text.charAt(i) == ‘ ‘) {
29             i++;
30         }
31 
32         return i;
33     }
34 
35     @Override
36     public int findTokenEnd(CharSequence text, int cursor) {
37         int i = cursor;
38         int len = text.length();
39 
40         while (i < len) {
41             if (text.charAt(i) == charS) {
42                 return i;
43             } else {
44                 i++;
45             }
46         }
47 
48         return len;
49     }
50 
51     @Override
52     public CharSequence terminateToken(CharSequence text) {
53         int i = text.length();
54 
55         while (i > 0 && text.charAt(i - 1) == ‘ ‘) {
56             i--;
57         }
58 
59         if (i > 0 && text.charAt(i - 1) == charS) {
60             return text;
61         } else {
62             if (text instanceof Spanned) {
63                 SpannableString sp = new SpannableString(text + mSTring);
64                 TextUtils.copySpansFrom((Spanned) text, 0, text.length(), Object.class, sp, 0);
65                 return sp;
66             } else {
67                 return text + mSTring;
68             }
69         }
70     }
71 }