Formatter.java

package se.slide.sgu;

import java.text.DecimalFormat;
import java.text.NumberFormat;

// https://github.com/augusto/android-sandbox/blob/master/src/com/augusto/mymediaplayer/common/Formatter.java
public final class Formatter {
    private Formatter() {}
    
    
    private static NumberFormat numberFormat = new DecimalFormat("00");
    
    /**
     * Formats time from milliseconds in the format m:ss
     * 
     * @param timeInMillis time in milliseconds
     * @return
     */
    public static String formatTimeFromMillis(int timeInMillis) {
        int minutes = timeInMillis/60000;
        int seconds = (timeInMillis%60000)/1000;
        
        return minutes + ":" + numberFormat.format(seconds);
    }
    
    public static int convertStartToSeconds(String start) {
        int colonIndex = start.indexOf(":");
        String minutes = start.substring(0, colonIndex);
        String seconds = start.substring(colonIndex + 1);
        
        int secA = Integer.valueOf(minutes) * 60;
        int secB = Integer.valueOf(seconds);
        
        return secA + secB;
    }
    
    public static String convertBytesToMegabytes(int bytes) {
        return Integer.toString(bytes / 1024 / 1024);
    }
}