How to findout unused resources in Android Project

1. Download the AndroidUnusedResources.jar from the following link https://code.google.com/p/android-unused-resources/

2. Once the download is done , copy the AndroidUnusedResources.jar to your project Folder.

3.Open the command prompt and navigate to your project Folder

4. Than type the following command for generating the list of unused resources in your Android Project
java -jar AndroidUnusedResources.jar

How to Split a string at every nth position in Java

The Splitting of a String can be achieved by using the regex

Using the following code below  we can split the  string using regex

String[] thiscombo2 = st.split("(?<=\\G..)");

where

i.  The st indicates the String that needs to be split

ii.  The 3 dots after the G indicates every nth position to split. In this case, the 3 dots indicate every 3 positions.

Input : String st = "123124125134135145234235245"

Output :  123 124 125 134 135 145 234 235 245

But using the regex for splitting a  String will have certain delay

So to overcome this problem we provide an alternative way

The following code below will split a String at every nth position according to the user's requirements 

  private String[] splitStringEvery(String s, int interval) {

        int arrayLength = (int) Math.ceil(((s.length() / (double) interval)));

        String[] result = new String[arrayLength];

        int j = 0;

        int lastIndex = result.length - 1;

        for (int i = 0; i < lastIndex; i++) {

            result[i] = s.substring(j, j + interval);

            j += interval;

        } // Add the last bit

        result[lastIndex] = s.substring(j);

        return result;

    }

Performance Tests using the regex split and splitStringEvery()

200 characters long string - interval is 3

Using split(" (<=\\G.{"+count+"})") performance (in Milliseconds):

3,1,1,1,0,1,1,2,0,0

Using splitStringEvery() ( substring () ) performance (in Milliseconds):

1,0,0,0,0,0,0,0,0,0