android,regex,text , Exctract values from given text in android


Exctract values from given text in android

Question:

Tag: android,regex,text

I am trying to extract values from a given text.

Here is the text:

String 1: $.675.00 was spent on your CAPITAL ONE CREDIT Card ending 2123 on 2015-05-04:15:28:08 at Best Buy

String 2: $ 1,310.00 was spent on your Credit Card 5178XXXXXXXX6040 on MAY-04-15 at Amazon Stores.

I want to extract the following from string:

  1. Amount after $
  2. Credit Card text
  3. Credit card number (in this case - 2123 or 5178XXXXXXXX6040)
  4. at which place (in this case Best Buy or Amazon Stores).

To start I was trying extract all the numbers from the string: I tried the following:

Pattern p = Pattern.compile("\\d+");
Matcher m = p.matcher(string1);
Log.e("Value","from String"+m.group(0));

I am always getting the following error:

05-05 10:09:35.532: E/AndroidRuntime(13618): java.lang.IllegalStateException: No successful match so far
05-05 10:09:35.532: E/AndroidRuntime(13618):    at java.util.regex.Matcher.ensureMatch(Matcher.java:471)
05-05 10:09:35.532: E/AndroidRuntime(13618):    at java.util.regex.Matcher.group(Matcher.java:578)

Why isn't it matching even though the text has numbers?

Thanks!


Answer:

As @justhecuke told there is no strict format for your string values to split using Patterns so I did using String functions, give a try

    String crType1 = "CREDIT Card ending ";//mind the space at end
    String crType2 = "Credit Card ";//mind the space at end

    String rate, cardNo, at;

    if (string1.contains(crType1)) {
        rate = getStringValue(string1, "$", " ");
        cardNo = getStringValue(string1, crType1, " ");
        at = getAddress(string1);
    } else {
        rate = getStringValue(string1, "$", " ");
        cardNo = getStringValue(string1, crType2, " ");
        at = getAddress(string1);
    }

    System.out.println(String.format("Rate : %s Card No : %s Address : %s", rate, cardNo, at));

Methods

public static String getAddress(String string) {
    return string.substring(string.lastIndexOf("at") + 2, string.length()).trim();
}

public static String getStringValue(String string, String startString, String endString) {
    int startAt = string.indexOf(startString) + startString.length();
    int endAt = string.indexOf(endString, startAt);
    return string.substring(startAt, endAt).trim();
}

Happy_Coding... :)


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