Android 正则表达式实例

editText正则表达式的使用 检查输入是否符合规则 

import Android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
/** 
* Class which shows how to validate user input with regular expression 
* 
* @author FaYnaSoft Labs 
*/ 
public class Main extends Activity { 
private EditText editText; 
private Button button; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
  editText = (EditText) findViewById(R.id.textId); 
  editText.setText("EditText element"); 
  button = (Button) findViewById(R.id.btnId); 
  button.setText("Check"); 
  button.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View v) { 
    if(checkString(editText.getText().toString())) { 
     editText.setText("Corect"); 
    } 
   } 
  }); 
} 
/** 
  * This method checks if String is correct 
  * @param s - String which need to check 
  * @return value of matching 
  */ 
private boolean checkString(String s) { 
  return s.matches("\\w*[.](Java|cpp|class)"); 
} 
} 

 

正则表达式查找字符 

文章分类:移动开发 
String s_Result="Distance: 2.8km (about 9 mins)"; 

//Distance parsing 
Pattern p = Pattern.compile("Distance: (\\d+(\\.\\d+)?)(.*?)\\b"); 
Matcher m = p.matcher(s_Result); 
if(m.find()){ 
    MatchResult mr=m.toMatchResult(); 
    f_Distance=mr.group(1);//2.8 
    m_DistanceUnit=mr.group(3);//km 
} 

//Time parsing 
p = Pattern.compile("about (\\d+(\\.\\d+)?) (.*)\\b"); 
m = p.matcher(s_Result); 
if(m.find()){ 
    MatchResult mr=m.toMatchResult(); 
    f_timeEst=mr.group(1);//9 
    m_timeEstUnit=mr.group(3);//min 
} 
或者 
String s_Result="Distance: 2.8km (about 9 mins)"; 
Pattern p = Pattern.compile("(\\d+(\\.\\d+)?) ?(\\w+?)\\b"); 
Matcher m = p.matcher(s_Result); 
while(m.find()){ 
    MatchResult mr=m.toMatchResult(); 
    String value=mr.group(1);//2.8 and 9 come here 
    String units=mr.group(3);//km and mins come here 
} 


正则表达式以过滤特殊字符 


在网上找了好久也没找到个合适的正则表达式以过滤特殊字符；自己学习了下，写了两个，实现要求。 
Java 代码 
// 过滤特殊字符  
    public   static   String StringFilter(String   str)   throws   PatternSyntaxException   {     
                // 只允许字母和数字       
                // String   regEx  =  "[^a-zA-Z0-9]";                     
                   // 清除掉所有特殊字符  
          String regEx="[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……& amp;*（）——+|{}【】‘；：”“’。，、？]";  
          Pattern   p   =   Pattern.compile(regEx);     
          Matcher   m   =   p.matcher(str);     
          return   m.replaceAll("").trim();     
          }     
    @Test         
    public    void   testStringFilter()   throws   PatternSyntaxException   {     
          String   str   =   "*adCVs*34_a _09_b5*[/435^*&城池()^$$&*). {}+.|.)%%*(*.中国}34{45[]12.fd'*&999下面是中文的字符￥……{}【】。，；’“‘”？";     
          System.out.println(str);     
          System.out.println(StringFilter(str));     
          }    
// 过滤特殊字符 public static String StringFilter(String str) throws PatternSyntaxException { // 只允许字母和数字 // String regEx = "[^a-zA-Z0-9]"; // 清除掉所有特殊字符 String regEx="[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]"; Pattern p = Pattern.compile(regEx); Matcher m = p.matcher(str); return m.replaceAll("").trim(); } @Test public void testStringFilter() throws PatternSyntaxException { String str = "*adCVs*34_a _09_b5*[/435^*&城池()^$$&*).{}+.|.)%%*(*.中国}34{45[]12.fd'*&999下面是中文的字符￥……{}【】。，；’“‘”？"; System.out.println(str); System.out.println(StringFilter(str)); } 

 

评论

1 楼 mcxiaoke 2010-11-02  

用InputFilter就可以了

android.text.InputFilter
Known Indirect Subclasses
DateKeyListener, DateTimeKeyListener, DialerKeyListener, DigitsKeyListener, InputFilter.AllCaps, InputFilter.LengthFilter, LoginFilter, LoginFilter.PasswordFilterGMail, LoginFilter.UsernameFilterGMail, LoginFilter.UsernameFilterGeneric, NumberKeyListener, TimeKeyListener