The CalculateQualityIndexes implements a method that calculates the index for different sections of photo qualities, and returns them as an array.

QualityUtils.java

/**
     * <h1>Calculate Index of Photo Resolutions</h1>
     * The CalculateQualityIndexes implements a method
     * that calculates the index for different sections
     * of photo qualities, and returns them as an array.
     * <h2>Example usage:</h2>
     * <p> Calculating the indexes for High, Medium and Low
     *  resolution photos fetched as JSONArray from Facebook
     *  GraphAPIs images field of photo endpoint,
     *  and stored in a LinkedHashMap.
     * </p>
     * <h2>Author's Remark</h2>
     * <p>I have used this in my closed-source KPCExplorer
     * Android App</p>
     *
     * @author haideralipunjabi
     * @version 1.0
     * @since 05-03-2017
     */
public class QualityUtils{
    /**
     * This method returns an int array containing the indexes
     * for specified number of qualities divided into
     * specified number of sections
     *
     * @param qualities This is the total number of qualities
     * @param sections This is the total number of sections
     * @return int[] This returns all the calculated indexes
     * as an int array
     */


    public static int[] CalculateQualityIndexes(int qualities, int sections) {
        final int[] mIndexes = new int[sections];
        final int[] mSizes = new int[sections];
        final int mQuotient = qualities / sections;
        final int mRemainder = qualities % sections;
        for (int i = 0; i < sections; i++) {
            int size = 0;
            if (i <= mRemainder && i > 0) {
                mSizes[i] = mQuotient + 1;
            } else {
                mSizes[i] = mQuotient;
            }
            mIndexes[i] = addSize(mSizes, i);


        }

        return mIndexes;
    }

    /**
     * This method adds the size of sections present
     * before the specified index
     * @param sizes Array of all the calculated sizes
     * @param index index of section before which the 
     *              total size is to be calculated
     * @return int The total sum of sizes
     */

    private static int addSize(int[] sizes, int index) {
        if (index == 0) {
            return 0;
        }
        return sizes[index - 1] + addSize(sizes, index - 1);
    }
}