驗證Android使用者輸入日期

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如何驗證使用者輸入的日期是有效還是無效？

private Pattern pattern;private Matcher matcher;private static final String DATE_PATTERN =        "(0?[1-9]|1[012]) [/.-] (0?[1-9]|[12][0-9]|3[01]) [/.-] ((19|20)\\d\\d)";/*** Validate date format with regular expression* @param date date address for validation* @return true valid date format, false invalid date format*/public boolean validate(final String date){  matcher = pattern.matcher(date);  if(matcher.matches()){      matcher.reset();      if(matcher.find()){          String day = matcher.group(1);          String month = matcher.group(2);          int year = Integer.parseInt(matcher.group(3));          if (day.equals("31") &&            (month.equals("4") || month .equals("6") || month.equals("9") ||                   month.equals("11") || month.equals("04") || month .equals("06") ||                   month.equals("09"))) {             return false; // only 1,3,5,7,8,10,12 has 31 days          }                   }      else{           return false;      }          }  else{      return false;  }              }

private Pattern pattern;private Matcher matcher;private static final String DATE_PATTERN =        "(0?[1-9]|1[012]) [/.-] (0?[1-9]|[12][0-9]|3[01]) [/.-] ((19|20)\\d\\d)";  /**   * Validate date format with regular expression   * @param date date address for validation   * @return true valid date format, false invalid date format   */public boolean validate(final String date){  matcher = pattern.matcher(date);  if(matcher.matches()){      matcher.reset();      if(matcher.find()){          String day = matcher.group(1);          String month = matcher.group(2);          int year = Integer.parseInt(matcher.group(3));          if (day.equals("31") &&             (month.equals("4") || month .equals("6") || month.equals("9") ||                   month.equals("11") || month.equals("04") || month .equals("06") ||                   month.equals("09"))) {             return false; // only 1,3,5,7,8,10,12 has 31 days          }           else if (month.equals("2") || month.equals("02")) {               //leap year               if(year % 4==0){                   if(day.equals("30") || day.equals("31")){                       return false;                   }                   else{                       return true;                   }              }              else{                  if(day.equals("29")||day.equals("30")||day.equals("31")){                      return false;                  }                  else{                      return true;                  }              }          }          else{                             return true;                          }      }      else{           return false;      }          }  else{      return false;  }              }

再將下面的代碼放到onClick()中：

matcher = Pattern.compile(DATE_PATTERN).matcher(Birthday);//Birthday validator    else if (!matcher.matches()) {    Toast.makeText(getApplicationContext(), "Invalid Birthday!", Toast.LENGTH_SHORt).show();                    }

 

驗證Android使用者輸入日期